:root {
    --app-viewport-h: 100svh;
    --compact-page-pad-x: 14px;
    --compact-page-pad-y: 8px;
    --compact-panel-pad: 10px;
    --compact-gap: 8px;
    --compact-control-h: 34px;
    --compact-action-h: 38px;
    --bottom-action-h: 38px;
}

body {
    letter-spacing: 0;
    height: var(--app-viewport-h);
    min-height: var(--app-viewport-h);
    overscroll-behavior-y: none;
}

:root[data-app-fullscreen="on"],
:root[data-app-fullscreen="on"] body {
    width: 100%;
    height: var(--app-viewport-h);
    min-height: var(--app-viewport-h);
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: none;
}

:root[data-app-fullscreen="on"] body {
    position: fixed;
    inset: 0;
    max-height: var(--app-viewport-h);
}

:root[data-app-fullscreen="on"] {
    position: fixed;
    inset: 0;
}

:root[data-app-fullscreen="on"] .app,
:root[data-app-fullscreen="on"] .main,
:root[data-app-fullscreen="on"] .work-panel,
:root[data-app-fullscreen="on"] .work-panel > .step,
:root[data-app-fullscreen="on"] .prompt-box,
:root[data-app-fullscreen="on"] .result-panel,
:root[data-app-fullscreen="on"] .result-box {
    overscroll-behavior: none;
    touch-action: none;
}

:root[data-app-fullscreen="on"] textarea,
:root[data-app-fullscreen="on"] select,
:root[data-app-fullscreen="on"] input,
:root[data-app-fullscreen="on"] button,
:root[data-app-fullscreen="on"] a,
:root[data-app-fullscreen="on"] .result-variants,
:root[data-app-fullscreen="on"] .asset-library-modal,
:root[data-app-fullscreen="on"] .image-edit-modal,
:root[data-app-fullscreen="on"] .result-viewer {
    touch-action: manipulation;
}

:root[data-app-fullscreen="on"] textarea,
:root[data-app-fullscreen="on"] .result-variants,
:root[data-app-fullscreen="on"] .asset-library-modal,
:root[data-app-fullscreen="on"] .image-edit-modal,
:root[data-app-fullscreen="on"] .result-viewer {
    touch-action: pan-y;
    overscroll-behavior: contain;
}

@supports (height: 100dvh) {
    :root {
        --app-viewport-h: 100dvh;
    }
}

.app {
    gap: var(--compact-gap);
    padding:
        max(var(--compact-page-pad-y), env(safe-area-inset-top))
        max(var(--compact-page-pad-x), env(safe-area-inset-right))
        max(var(--compact-page-pad-y), env(safe-area-inset-bottom))
        max(var(--compact-page-pad-x), env(safe-area-inset-left));
}

.topbar {
    min-height: 54px;
}

.brand {
    gap: 9px;
}

.brand-mark,
.brand-logo {
    width: 52px;
    height: 52px;
}

.brand-text {
    margin-left: -4px;
}

.brand h1 {
    font-size: 22px;
    letter-spacing: 0;
}

.brand p {
    margin-top: 2px;
    font-size: 12px;
}

.top-actions {
    gap: 7px;
}

.icon-btn,
.text-btn {
    min-height: var(--compact-action-h);
    border-radius: 8px;
    padding: 0 12px;
}

.icon-btn {
    width: var(--compact-action-h);
}

.main {
    gap: 10px;
    grid-template-columns: minmax(560px, 3fr) minmax(420px, 2fr);
}

.work-panel,
.result-panel {
    padding: var(--compact-panel-pad);
    gap: 8px;
}

.panel {
    border-width: 1px;
}

:root[data-theme="night"] .panel {
    box-shadow: 0 18px 44px rgba(0, 0, 0, .30);
}

.work-panel {
    --mode-step-h: clamp(238px, 26vh, 286px);
    --settings-step-h: clamp(150px, 15vh, 172px);
    --mode-param-h: 56px;
    --settings-grid-h: 48px;
    --generate-row-h: 38px;
    --message-row-h: 18px;
    --step-gap: 6px;
    --upload-frame-offset: calc(24px + var(--step-gap));
    grid-template-rows: minmax(138px, 1fr) var(--mode-step-h) var(--settings-step-h);
}

.work-panel > .step:nth-of-type(3) {
    grid-template-rows: auto var(--settings-grid-h) minmax(0, 1fr) var(--message-row-h) var(--generate-row-h);
}

.work-panel > .step {
    border-radius: 8px;
}

.step-head,
.result-head {
    min-height: 24px;
    gap: 8px;
}

.step-title {
    gap: 7px;
    font-size: 13px;
    line-height: 1.15;
}

.step-badge {
    width: 22px;
    height: 22px;
    font-size: 11px;
}

.hint,
label,
.status-pill,
.message {
    font-size: 11px;
}

.mode-switch {
    margin-left: 5px;
    padding: 2px;
    gap: 2px;
}

.mode-switch-btn {
    min-height: 27px;
    padding: 0 10px;
    border-radius: 7px;
    font-size: 11px;
}

.dropzone {
    padding: 10px;
    border-width: 1px;
    border-radius: 8px;
}

.empty-upload {
    gap: 8px;
}

.upload-icon {
    width: 40px;
    height: 40px;
}

.upload-actions {
    gap: 7px;
}

.primary-btn,
.secondary-btn {
    min-height: var(--compact-action-h);
    border-radius: 8px;
    gap: 7px;
    padding: 0 12px;
    font-size: 12px;
}

:root[data-theme="night"] .primary-btn {
    box-shadow: 0 12px 26px rgba(0, 0, 0, .30), inset 0 0 0 1px rgba(255, 255, 255, .10);
}

.prompt-box,
.mode-controls,
.mode-extra {
    gap: 6px;
}

.quick-grid {
    gap: 6px;
    padding: 0 5px;
}

.quick-btn {
    min-height: 30px;
    border-radius: 8px;
    padding: 3px 8px;
    font-size: 12px;
    font-weight: 800;
}

.mode-control-group {
    gap: 6px;
}

.mode-control-group .field,
.settings > .field {
    gap: 3px;
    padding: 4px 7px;
    border-radius: 8px;
}

.mode-control-group .field {
    grid-template-rows: 12px minmax(0, 30px);
}

.mode-control-group select,
select {
    height: 30px;
    border-radius: 8px;
    padding: 0 8px;
    font-size: 11px;
}

textarea {
    padding: 7px 9px;
    border-radius: 8px;
    font-size: 11px;
    line-height: 1.35;
}

.settings {
    gap: 6px;
    padding: 0 5px;
}

.settings > .field {
    grid-template-rows: 12px minmax(0, 30px);
}

.generate-row {
    gap: 7px;
    grid-row: 5;
    height: var(--generate-row-h);
}

.generate-row .primary-btn,
.generate-row > .concurrency-field,
.generate-row > .concurrency-field select {
    height: var(--generate-row-h);
    min-height: var(--generate-row-h);
}

.message {
    display: block;
    grid-row: 4;
    height: var(--message-row-h);
    line-height: calc(var(--message-row-h) - 2px);
    padding: 0 9px;
    visibility: visible;
    border: 1px solid rgba(158, 189, 177, .10);
    background: rgba(255, 255, 255, .018);
    opacity: .72;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message.show {
    position: static;
    display: block;
    visibility: visible;
    height: var(--message-row-h);
    line-height: calc(var(--message-row-h) - 2px);
    opacity: 1;
}

.result-panel {
    --variant-strip-h: 88px;
    --variant-card-w: 92px;
    grid-template-rows: auto minmax(180px, 1fr) auto;
}

.result-panel.has-variants {
    grid-template-rows: auto minmax(160px, 1fr) var(--variant-strip-h) auto;
}

.status-pill {
    min-height: 23px;
    padding: 3px 8px;
    gap: 6px;
}

.status-dot {
    width: 6px;
    height: 6px;
}

.result-box {
    border-radius: 8px;
}

.result-placeholder {
    gap: 9px;
    padding: 16px;
}

.result-brand {
    width: clamp(76px, 15vw, 104px);
}

.result-actions {
    gap: 7px;
}

.result-actions .secondary-btn {
    height: var(--bottom-action-h);
    min-height: var(--bottom-action-h);
}

@media (min-width: 1440px) {
    :root {
        --compact-page-pad-x: 16px;
        --compact-page-pad-y: 9px;
        --compact-panel-pad: 11px;
    }

    .main {
        gap: 12px;
    }

    .work-panel {
        --mode-step-h: clamp(250px, 27vh, 296px);
        --settings-step-h: clamp(154px, 15vh, 176px);
        grid-template-rows: minmax(150px, 1fr) var(--mode-step-h) var(--settings-step-h);
    }
}

@media (min-width: 2200px) {
    :root {
        --compact-page-pad-x: 24px;
        --compact-page-pad-y: 14px;
        --compact-panel-pad: 18px;
        --compact-gap: 16px;
        --compact-action-h: 52px;
        --bottom-action-h: 54px;
    }

    .app {
        gap: var(--compact-gap);
    }

    .topbar {
        min-height: 82px;
    }

    .brand {
        gap: 14px;
    }

    .brand-mark,
    .brand-logo {
        width: 74px;
        height: 74px;
    }

    .brand h1 {
        font-size: 34px;
        line-height: 1.08;
    }

    .brand p {
        margin-top: 5px;
        font-size: 17px;
    }

    .top-actions {
        gap: 12px;
    }

    .icon-btn,
    .text-btn {
        min-height: var(--compact-action-h);
        border-radius: 10px;
        padding: 0 18px;
        font-size: 17px;
    }

    .icon-btn {
        width: var(--compact-action-h);
    }

    .main {
        gap: 18px;
        grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    }

    .work-panel,
    .result-panel {
        padding: var(--compact-panel-pad);
        gap: 14px;
    }

    .work-panel {
        --mode-step-h: clamp(430px, 27vh, 580px);
        --settings-step-h: 258px;
        --mode-param-h: 82px;
        --settings-grid-h: 74px;
        --generate-row-h: 56px;
        --message-row-h: 26px;
        --step-gap: 11px;
        --upload-frame-offset: calc(34px + var(--step-gap));
        grid-template-rows: minmax(560px, 1fr) var(--mode-step-h) var(--settings-step-h);
    }

    .work-panel > .step {
        border-radius: 10px;
    }

    .step-head,
    .result-head {
        min-height: 34px;
        gap: 12px;
    }

    .step-title {
        gap: 10px;
        font-size: 18px;
    }

    .step-badge {
        width: 32px;
        height: 32px;
        font-size: 15px;
    }

    .hint,
    label,
    .status-pill,
    .message {
        font-size: 15px;
    }

    .mode-switch {
        margin-left: 8px;
        padding: 3px;
        gap: 4px;
    }

    .mode-switch-btn {
        min-height: 40px;
        padding: 0 18px;
        border-radius: 9px;
        font-size: 15px;
    }

    .dropzone {
        padding: 18px;
        border-radius: 10px;
    }

    .empty-upload {
        gap: 14px;
    }

    .upload-icon {
        width: 62px;
        height: 62px;
    }

    .upload-actions {
        gap: 12px;
    }

    .primary-btn,
    .secondary-btn {
        min-height: var(--compact-action-h);
        border-radius: 10px;
        gap: 10px;
        padding: 0 18px;
        font-size: 17px;
    }

    .prompt-box,
    .mode-controls,
    .mode-extra {
        gap: 10px;
    }

    .quick-grid {
        gap: 10px;
        padding: 0 8px;
    }

    .quick-btn {
        min-height: 48px;
        border-radius: 10px;
        padding: 5px 12px;
        font-size: 17px;
    }

    .mode-control-group {
        gap: 12px;
    }

    .mode-control-group .field,
    .settings > .field {
        gap: 5px;
        padding: 7px 11px;
        border-radius: 10px;
    }

    .mode-control-group .field,
    .settings > .field {
        grid-template-rows: 18px minmax(0, 44px);
    }

    .mode-control-group select,
    select {
        height: 44px;
        border-radius: 10px;
        padding: 0 12px;
        font-size: 16px;
    }

    textarea {
        padding: 11px 13px;
        border-radius: 10px;
        font-size: 16px;
        line-height: 1.42;
    }

    .settings {
        gap: 12px;
        padding: 0 8px;
    }

    .generate-row {
        gap: 12px;
    }

    .message {
        padding: 0 12px;
        line-height: calc(var(--message-row-h) - 2px);
    }

    .result-panel {
        --variant-strip-h: 150px;
        --variant-card-w: 150px;
    }

    .result-panel.has-variants {
        grid-template-rows: auto minmax(360px, 1fr) var(--variant-strip-h) auto;
    }

    .status-pill {
        min-height: 34px;
        padding: 5px 12px;
        gap: 9px;
    }

    .status-dot {
        width: 8px;
        height: 8px;
    }

    .result-box {
        border-radius: 10px;
    }

    .result-placeholder {
        gap: 14px;
        padding: 28px;
    }

    .result-brand {
        width: 150px;
    }

    .result-placeholder h2 {
        font-size: 26px;
    }

    .result-placeholder p {
        font-size: 16px;
        line-height: 1.45;
    }

    .result-actions {
        gap: 12px;
    }

    .result-actions .secondary-btn {
        height: var(--bottom-action-h);
        min-height: var(--bottom-action-h);
    }
}

@media (max-width: 1180px) {
    :root {
        --compact-page-pad-x: 8px;
        --compact-page-pad-y: 6px;
        --compact-panel-pad: 9px;
        --compact-gap: 8px;
        --compact-action-h: 34px;
        --bottom-action-h: 34px;
    }

    .topbar {
        min-height: 40px;
    }

    .brand {
        gap: 9px;
    }

    .brand-mark,
    .brand-logo {
        width: 36px;
        height: 36px;
    }

    .brand-logo {
        margin-top: 0;
    }

    .brand-text {
        margin-left: 0;
    }

    .brand h1 {
        font-size: 18px;
    }

    .brand p {
        display: none;
    }

    .icon-btn,
    .text-btn {
        min-height: var(--compact-action-h);
        padding: 0 9px;
        font-size: 11px;
    }

    .icon-btn {
        width: var(--compact-action-h);
    }

    .main {
        grid-template-columns: minmax(0, 3fr) minmax(260px, 2fr);
        gap: 8px;
    }

    .work-panel,
    .result-panel {
        padding: var(--compact-panel-pad);
        gap: 8px;
    }

    .work-panel {
        --mode-step-h: 276px;
        --settings-step-h: 154px;
        --mode-param-h: 62px;
        --settings-grid-h: 44px;
        --generate-row-h: 34px;
        --message-row-h: 16px;
        --step-gap: 6px;
        --upload-frame-offset: calc(20px + var(--step-gap));
        grid-template-rows: minmax(104px, 1fr) var(--mode-step-h) var(--settings-step-h);
    }

    .step-title {
        font-size: 12px;
        gap: 6px;
    }

    .step-badge {
        width: 20px;
        height: 20px;
        font-size: 10px;
    }

    .hint,
    label,
    .status-pill,
    .message {
        font-size: 10px;
    }

    .dropzone {
        padding: 8px;
    }

    .upload-actions,
    .settings,
    .generate-row,
    .quick-grid,
    .mode-control-group,
    .result-actions {
        gap: 6px;
    }

    .primary-btn,
    .secondary-btn {
        min-height: var(--compact-action-h);
        padding: 0 10px;
        gap: 6px;
        font-size: 11px;
    }

    .quick-btn {
        min-height: 28px;
        padding: 3px 6px;
        font-size: 10px;
    }

    .mode-switch-btn {
        min-height: 28px;
        padding: 0 9px;
        font-size: 10px;
    }

    .mode-control-group .field,
    .settings > .field {
        padding: 4px 6px;
        grid-template-rows: 10px minmax(0, 30px);
    }

    select,
    .mode-control-group select {
        height: 32px;
        padding: 0 8px;
        font-size: 11px;
    }

    textarea {
        min-height: 0;
        height: 100%;
        padding: 7px 9px;
        font-size: 11px;
        line-height: 1.34;
    }

    .message {
        padding: 0 8px;
        line-height: calc(var(--message-row-h) - 2px);
    }

    .result-panel {
        --variant-strip-h: 84px;
        --variant-card-w: 84px;
        grid-template-rows: auto minmax(160px, 1fr) auto;
    }

    .result-placeholder {
        padding: 12px;
        gap: 8px;
    }

    .result-brand {
        width: min(92px, 28vw);
    }
}

@media (min-width: 921px) and (max-width: 1180px) {
    .generate-row .primary-btn,
    .generate-row > .concurrency-field,
    .generate-row > .concurrency-field select,
    .result-actions .secondary-btn {
        height: var(--compact-action-h);
        min-height: var(--compact-action-h);
    }
}

@media (max-width: 920px) {
    body {
        overflow: auto;
    }

    .app {
        height: auto;
        min-height: 100svh;
        overflow: visible;
        grid-template-rows: auto auto;
    }

    .main {
        grid-template-columns: 1fr;
        height: auto;
        overflow: visible;
    }

    .work-panel,
    .result-panel {
        height: auto;
        overflow: visible;
    }

    .work-panel {
        --mode-step-h: auto;
        --settings-step-h: auto;
        --mode-param-h: auto;
        --settings-grid-h: auto;
        --generate-row-h: 42px;
        --message-row-h: 20px;
        display: block;
        min-height: 780px;
    }

    .work-panel > .step {
        margin: 0;
        overflow: visible;
    }

    .work-panel > .step + .step {
        margin-top: 8px;
    }

    .work-panel > .step:first-child {
        min-height: 330px;
        grid-template-rows: auto minmax(210px, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 210px;
    }

    .work-panel > .step:nth-of-type(2),
    .work-panel > .step:nth-of-type(3) {
        min-height: 0;
    }

    .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto auto;
    }

    .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto auto minmax(92px, auto) var(--message-row-h) var(--generate-row-h);
    }

    .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .mode-control-group,
    .settings {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .result-panel {
        min-height: 58svh;
        grid-template-rows: auto minmax(360px, 58svh) auto;
    }

    .result-box {
        min-height: 360px;
    }

    .result-actions {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    :root {
        --compact-page-pad-x: 7px;
        --compact-page-pad-y: 7px;
        --compact-panel-pad: 8px;
        --compact-action-h: 42px;
        --bottom-action-h: 42px;
    }

    .topbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .brand h1 {
        font-size: 20px;
    }

    .brand-mark,
    .brand-logo {
        width: 38px;
        height: 38px;
    }

    .top-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 42px 1fr 42px;
        gap: 7px;
    }

    .top-actions .text-btn {
        width: 100%;
    }

    .top-actions .text-btn span {
        display: inline;
    }

    .work-panel {
        --generate-row-h: 42px;
        --message-row-h: 20px;
        --step-gap: 7px;
        min-height: 1124px;
    }

    .work-panel > .step:first-child {
        min-height: 300px;
        grid-template-rows: auto minmax(184px, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 184px;
    }

    .step-head {
        align-items: flex-start;
        gap: 6px;
    }

    .step-title {
        font-size: 12px;
    }

    .mode-head-actions {
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .mode-switch {
        margin-left: 0;
    }

    .quick-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .quick-btn {
        min-height: 36px;
        font-size: 12px;
    }

    .mode-control-group,
    .settings {
        grid-template-columns: 1fr;
    }

    .mode-control-group .field,
    .settings > .field {
        grid-template-rows: 13px 34px;
    }

    select,
    .mode-control-group select {
        height: 34px;
        font-size: 12px;
    }

    textarea {
        min-height: 112px;
        font-size: 12px;
    }

    .generate-row {
        grid-template-columns: 1fr;
        height: auto;
    }

    .generate-row .primary-btn,
    .generate-row > .concurrency-field,
    .generate-row > .concurrency-field select {
        grid-column: auto;
        height: var(--generate-row-h);
        min-height: var(--generate-row-h);
    }

    .upload-actions,
    .result-actions {
        grid-template-columns: 1fr;
    }

    .primary-btn,
    .secondary-btn {
        width: 100%;
        min-height: var(--compact-action-h);
        font-size: 13px;
    }

    .empty-upload .hint {
        white-space: normal;
    }

    .result-panel {
        min-height: 66svh;
        grid-template-rows: auto minmax(330px, 66svh) auto;
    }
}

.font-scale-btn {
    font-weight: 800;
    white-space: nowrap;
}

.font-scale-btn.is-active {
    border-color: var(--accent);
    color: var(--accent-strong);
    background: var(--accent-soft);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
}

:root[data-theme="night"] .font-scale-btn.is-active {
    color: var(--accent-strong);
}

:root[data-font-scale="large"] .brand h1 {
    font-size: 24px;
}

:root[data-font-scale="large"] .brand p {
    font-size: 13px;
}

:root[data-font-scale="large"] .step-title {
    font-size: 15px;
}

:root[data-font-scale="large"] .hint,
:root[data-font-scale="large"] label,
:root[data-font-scale="large"] .status-pill,
:root[data-font-scale="large"] .message,
:root[data-font-scale="large"] select,
:root[data-font-scale="large"] textarea,
:root[data-font-scale="large"] .quick-btn,
:root[data-font-scale="large"] .primary-btn,
:root[data-font-scale="large"] .secondary-btn,
:root[data-font-scale="large"] .mode-switch-btn,
:root[data-font-scale="large"] .text-btn,
:root[data-font-scale="large"] .icon-btn {
    font-size: 13px;
}

:root[data-font-scale="large"] .mode-control-group select,
:root[data-font-scale="large"] select {
    height: 32px;
}

@media (min-width: 2200px) {
    :root[data-font-scale="large"] .brand h1 {
        font-size: 38px;
    }

    :root[data-font-scale="large"] .brand p,
    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn {
        font-size: 18px;
    }

    :root[data-font-scale="large"] .step-title {
        font-size: 20px;
    }

    :root[data-font-scale="large"] .hint,
    :root[data-font-scale="large"] label,
    :root[data-font-scale="large"] .status-pill,
    :root[data-font-scale="large"] .message {
        font-size: 16px;
    }
}

@media (max-width: 920px) {
    body {
        overflow: hidden;
    }

    .app {
        height: var(--app-viewport-h);
        min-height: 0;
        overflow: hidden;
        grid-template-rows: auto minmax(0, 1fr);
    }

    .topbar {
        align-items: center;
        flex-direction: row;
        min-height: 40px;
    }

    .main {
        grid-template-columns: minmax(0, 1fr) minmax(0, .72fr);
        height: 100%;
        min-height: 0;
        overflow: hidden;
    }

    .work-panel,
    .result-panel {
        height: 100%;
        min-height: 0;
        overflow: hidden;
    }

    .work-panel {
        --mode-step-h: 276px;
        --settings-step-h: 154px;
        --mode-param-h: 62px;
        --settings-grid-h: 44px;
        --generate-row-h: 34px;
        --message-row-h: 16px;
        display: grid;
        min-height: 0;
        grid-template-rows: minmax(104px, 1fr) var(--mode-step-h) var(--settings-step-h);
    }

    .work-panel > .step {
        margin: calc(-1 * var(--step-border-width));
        overflow: hidden;
    }

    .work-panel > .step + .step {
        margin-top: calc(-1 * var(--step-border-width));
    }

    .work-panel > .step:first-child {
        min-height: 0;
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 0;
    }

    .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
    }

    .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) minmax(0, 1fr) var(--message-row-h) var(--generate-row-h);
    }

    .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .mode-control-group,
    .settings {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .generate-row {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        height: var(--generate-row-h);
    }

    .generate-row .primary-btn {
        grid-column: span 2;
    }

    .result-panel {
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    .result-box {
        min-height: 0;
    }

    .result-actions {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .top-actions .font-scale-btn {
        min-width: 68px;
    }

    .top-actions .font-scale-btn span {
        display: inline;
    }
}

@media (max-width: 640px) {
    :root {
        --compact-page-pad-x: 5px;
        --compact-page-pad-y: 5px;
        --compact-panel-pad: 5px;
        --compact-gap: 5px;
        --compact-action-h: 28px;
        --bottom-action-h: 28px;
    }

    .topbar {
        min-height: 42px;
        gap: 6px;
    }

    .brand {
        gap: 5px;
        flex: 1 1 auto;
    }

    .brand-mark,
    .brand-logo {
        width: 32px;
        height: 32px;
    }

    .brand h1 {
        font-size: 15px;
    }

    .brand p {
        display: none;
    }

    .top-actions {
        width: auto;
        display: flex;
        flex: 0 0 auto;
        gap: 4px;
    }

    .top-actions .text-btn:not(.font-scale-btn) span {
        display: none;
    }

    .icon-btn,
    .text-btn {
        min-height: var(--compact-action-h);
        border-radius: 7px;
        padding: 0 7px;
        font-size: 10px;
    }

    .icon-btn {
        width: var(--compact-action-h);
        padding: 0;
    }

    .font-scale-btn {
        min-width: 48px;
    }

    .main {
        grid-template-columns: minmax(0, 1fr) minmax(0, .64fr);
        gap: 5px;
    }

    .work-panel,
    .result-panel {
        padding: var(--compact-panel-pad);
        gap: 5px;
    }

    .work-panel {
        --mode-step-h: clamp(232px, 31vh, 260px);
        --settings-step-h: clamp(190px, 27vh, 226px);
        --mode-param-h: 52px;
        --settings-grid-h: 37px;
        --generate-row-h: 28px;
        --message-row-h: 12px;
        --step-gap: 4px;
        --upload-frame-offset: calc(18px + var(--step-gap));
        grid-template-rows: minmax(96px, 1fr) var(--mode-step-h) var(--settings-step-h);
    }

    .step-head,
    .result-head {
        min-height: 18px;
        gap: 4px;
    }

    .step-title {
        gap: 4px;
        font-size: 9px;
    }

    .step-badge {
        width: 16px;
        height: 16px;
        font-size: 8px;
    }

    .hint,
    label,
    .status-pill,
    .message {
        font-size: 8px;
    }

    .dropzone {
        padding: 5px;
        border-radius: 7px;
    }

    .empty-upload {
        gap: 5px;
    }

    .empty-upload .upload-icon {
        width: 28px;
        height: 28px;
    }

    .empty-upload .hint {
        white-space: normal;
    }

    .upload-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 4px;
    }

    .primary-btn,
    .secondary-btn {
        min-height: var(--compact-action-h);
        width: 100%;
        border-radius: 7px;
        gap: 3px;
        padding: 0 4px;
        font-size: 8px;
    }

    .mode-switch {
        margin-left: 3px;
        padding: 1px;
        gap: 1px;
    }

    .mode-switch-btn {
        min-height: 20px;
        border-radius: 6px;
        padding: 0 5px;
        font-size: 8px;
    }

    .quick-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 4px;
        padding: 0 3px;
    }

    .quick-btn {
        min-height: 23px;
        border-radius: 7px;
        padding: 2px 3px;
        font-size: 8px;
    }

    .mode-control-group {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 4px;
    }

    .mode-control-group .field,
    .settings > .field {
        gap: 2px;
        padding: 3px 4px;
        border-radius: 7px;
        grid-template-rows: 9px minmax(0, 24px);
    }

    .settings {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 4px;
        padding: 0 3px;
    }

    select,
    .mode-control-group select {
        height: 24px;
        border-radius: 7px;
        padding: 0 4px;
        font-size: 8px;
    }

    textarea {
        min-height: 0;
        height: 100%;
        padding: 5px;
        border-radius: 7px;
        font-size: 8px;
        line-height: 1.25;
    }

    .message {
        padding: 0 5px;
        line-height: calc(var(--message-row-h) - 2px);
    }

    .generate-row {
        gap: 4px;
    }

    .generate-row .primary-btn,
    .generate-row > .concurrency-field,
    .generate-row > .concurrency-field select {
        height: var(--generate-row-h);
        min-height: var(--generate-row-h);
    }

    .result-panel {
        --variant-strip-h: 58px;
        --variant-card-w: 58px;
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    .status-pill {
        min-height: 18px;
        padding: 2px 5px;
        gap: 3px;
    }

    .status-dot {
        width: 5px;
        height: 5px;
    }

    .result-placeholder {
        padding: 6px;
        gap: 5px;
    }

    .result-brand {
        width: min(58px, 26vw);
    }

    .result-placeholder h2 {
        font-size: 11px;
    }

    .result-placeholder p {
        font-size: 8px;
        line-height: 1.25;
    }

    .result-actions {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .result-actions .secondary-btn {
        height: 25px;
        min-height: 25px;
    }

    :root[data-font-scale="large"] .brand h1 {
        font-size: 16px;
    }

    :root[data-font-scale="large"] .step-title,
    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .mode-switch-btn,
    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn {
        font-size: 9px;
    }

    :root[data-font-scale="large"] .hint,
    :root[data-font-scale="large"] label,
    :root[data-font-scale="large"] .status-pill,
    :root[data-font-scale="large"] .message {
        font-size: 8.5px;
    }
}

.fullscreen-btn {
    font-weight: 800;
    white-space: nowrap;
}

.fullscreen-btn.is-active {
    border-color: var(--accent);
    color: var(--accent-strong);
    background: var(--accent-soft);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
}

.fullscreen-btn.is-exit-armed {
    border-color: color-mix(in srgb, var(--accent) 72%, #ffffff 0%);
    color: #ffffff;
    background: color-mix(in srgb, var(--accent) 82%, #111111 18%);
    box-shadow:
        inset 0 0 0 1px color-mix(in srgb, #ffffff 30%, transparent),
        0 0 0 2px color-mix(in srgb, var(--accent) 22%, transparent);
}

:root[data-theme="night"] .fullscreen-btn.is-active {
    color: var(--accent-strong);
}

:root[data-app-fullscreen="on"] body {
    overflow: hidden;
    background: var(--bg);
}

:root[data-app-fullscreen="on"] .app {
    max-width: none;
    width: 100%;
    height: var(--app-viewport-h);
    max-height: var(--app-viewport-h);
    padding:
        max(4px, env(safe-area-inset-top))
        max(4px, env(safe-area-inset-right))
        max(4px, env(safe-area-inset-bottom))
        max(4px, env(safe-area-inset-left));
    gap: 6px;
}

:root[data-app-fullscreen="on"] .topbar {
    min-height: 40px;
}

@media (max-width: 920px), (max-width: 1366px) and (max-height: 920px) {
    body {
        overflow: hidden;
    }

    .app {
        height: var(--app-viewport-h);
        min-height: 0;
        overflow: hidden;
    }

    .topbar {
        min-height: 42px;
    }

    .main {
        height: 100%;
        min-height: 0;
    }

    .work-panel,
    .result-panel {
        min-height: 0;
        overscroll-behavior: contain;
    }

    .work-panel > .step {
        min-height: 0;
    }

    .work-panel > .step:first-child {
        min-height: 304px;
        grid-template-rows: auto minmax(250px, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }

    .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
    }

    .mode-extra,
    textarea,
    #prompt {
        min-height: calc(3 * 1.35em + 18px);
    }

    textarea,
    #prompt {
        height: auto;
        line-height: 1.35;
    }

    .top-actions .fullscreen-btn {
        min-width: 76px;
    }

    .top-actions .font-scale-btn span,
    .top-actions .fullscreen-btn span {
        display: inline;
    }
}

@media (max-width: 920px) and (orientation: portrait), (max-width: 1366px) and (pointer: coarse) and (orientation: portrait) {
    .main {
        grid-template-columns: minmax(min(250px, 64vw), 1fr) minmax(112px, .58fr);
        grid-template-rows: minmax(0, 1fr);
        gap: 6px;
        overflow: hidden;
    }

    .work-panel {
        --mode-step-h: clamp(220px, 28svh, 292px);
        --settings-step-h: clamp(178px, 21svh, 230px);
        display: grid;
        grid-template-rows: minmax(304px, 1fr) var(--mode-step-h) var(--settings-step-h);
        overflow: auto;
    }

    .result-panel {
        overflow: hidden;
    }

    .result-box {
        min-height: 0;
    }
}

@media (max-width: 920px) and (orientation: landscape), (max-width: 1366px) and (max-height: 920px) and (orientation: landscape) {
    .main {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(276px, 1fr) minmax(44px, .18fr);
        gap: 6px;
        overflow: auto;
    }

    .work-panel,
    .result-panel {
        padding: 5px;
    }

    .step-head,
    .result-head {
        min-height: 18px;
    }

    .work-panel {
        --mode-step-h: clamp(212px, 34svh, 268px);
        --settings-step-h: clamp(168px, 28svh, 220px);
        display: grid;
        grid-template-columns: minmax(250px, .78fr) minmax(260px, 1fr) minmax(238px, .84fr);
        grid-template-rows: minmax(0, 1fr);
        overflow: hidden;
    }

    .result-panel {
        min-height: 44px;
        overflow: hidden;
    }
}

@media (max-width: 640px) {
    .top-actions .text-btn:not(.font-scale-btn):not(.fullscreen-btn) span {
        display: none;
    }

    .top-actions .text-btn.font-scale-btn span,
    .top-actions .text-btn.fullscreen-btn span {
        display: inline;
    }

    .top-actions .fullscreen-btn {
        min-width: 54px;
    }

    .fullscreen-btn {
        padding: 0 6px;
    }

    .mode-extra,
    textarea,
    #prompt {
        min-height: calc(3 * 1.35em + 16px);
    }

    .work-panel > .step:first-child {
        min-height: 300px;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }
}

/* Final responsive repair: keep controls accessible instead of clipping them. */
@media (max-width: 920px), (max-width: 1366px) and (max-height: 920px) {
    .work-panel > .step,
    .result-panel,
    .result-box {
        min-width: 0;
    }

    .work-panel > .step:nth-of-type(2),
    .work-panel > .step:nth-of-type(3),
    .prompt-box,
    .mode-param-slot,
    .settings,
    .result-box {
        overflow: visible;
    }

    .result-placeholder,
    .result-placeholder h2,
    .result-placeholder p {
        min-width: 0;
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .result-brand {
        max-width: min(80%, 120px);
    }
}

@media (max-width: 920px) and (orientation: portrait) {
    .main {
        grid-template-columns: minmax(244px, 1fr) minmax(124px, .52fr);
        grid-template-rows: minmax(0, 1fr);
        overflow: hidden;
    }

    .work-panel {
        grid-template-rows: 304px 276px minmax(190px, 1fr);
        overflow: hidden;
    }

    .work-panel > .step:first-child {
        min-height: 304px;
        grid-template-rows: auto minmax(250px, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }

    .work-panel > .step:nth-of-type(2) {
        min-height: 276px;
    }

    .work-panel > .step:nth-of-type(3) {
        min-height: 190px;
        --settings-grid-h: 46px;
    }

    .settings > .field {
        min-height: 46px;
    }

    .result-panel {
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    .result-box {
        min-height: 0;
    }
}

@media (max-width: 640px) and (orientation: portrait) {
    .main {
        grid-template-columns: minmax(242px, 1fr) minmax(124px, .5fr);
        gap: 4px;
    }

    .work-panel {
        --mode-step-h: 276px;
        --settings-step-h: 190px;
        --settings-grid-h: 46px;
        grid-template-rows: 304px 276px minmax(190px, 1fr);
    }

    .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(247px, 1fr);
    }

    .prompt-box {
        align-content: start;
    }

    .settings {
        min-height: 46px;
    }

    .result-placeholder {
        padding: 4px;
    }

    .result-placeholder h2 {
        font-size: 10px;
        line-height: 1.2;
    }

    .result-placeholder p {
        font-size: 8px;
        line-height: 1.25;
    }

    .result-actions {
        gap: 3px;
    }
}

@media (max-width: 920px) and (orientation: landscape), (max-width: 1366px) and (max-height: 920px) and (orientation: landscape) {
    .main {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(304px, 1fr) minmax(180px, .42fr);
        overflow: hidden;
    }

    .work-panel {
        min-height: 304px;
        grid-template-columns: minmax(250px, .78fr) minmax(260px, 1fr) minmax(238px, .84fr);
        grid-template-rows: minmax(0, 1fr);
        overflow: visible;
    }

    .work-panel > .step:first-child {
        min-height: 304px;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }

    .work-panel > .step:nth-of-type(2) {
        min-height: 276px;
    }

    .work-panel > .step:nth-of-type(3) {
        min-height: 266px;
    }

    .result-panel {
        min-height: 180px;
        grid-template-rows: auto minmax(96px, 1fr) auto;
        overflow: visible;
    }

    .result-box {
        min-height: 0;
    }
}

@media (max-height: 520px) and (orientation: landscape) {
    .app {
        overflow: hidden;
    }

    .main {
        grid-template-rows: 304px 180px;
        overflow: auto;
        align-content: start;
    }

    .work-panel {
        height: 304px;
        overflow: visible;
    }

    .result-panel {
        min-height: 180px;
    }
}

/* Final fit audit fixes: avoid clipping in narrow tablet and phone layouts. */
@media (max-width: 920px), (max-width: 1366px) and (max-height: 920px) {
    .main,
    .work-panel,
    .result-panel,
    .work-panel > .step,
    .dropzone,
    .empty-upload,
    .empty-upload > div,
    .source-list,
    .source-card,
    .result-box,
    .result-placeholder,
    .result-actions,
    .upload-actions,
    .primary-btn,
    .secondary-btn {
        min-width: 0;
        max-width: 100%;
        box-sizing: border-box;
    }

    .empty-upload {
        width: 100%;
        justify-items: center;
        text-align: center;
    }

    .empty-upload > div:last-child {
        width: 100%;
        min-width: 0;
        max-width: 100%;
    }

    .empty-upload strong,
    .empty-upload .hint,
    .source-name,
    .source-role,
    .result-placeholder h2,
    .result-placeholder p,
    .result-placeholder .result-hint,
    .result-placeholder .result-contact,
    .message,
    .status-pill {
        max-width: 100%;
        white-space: normal;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    .result-placeholder {
        width: 100%;
        grid-template-columns: minmax(0, 1fr);
        justify-items: center;
        text-align: center;
    }

    .result-brand {
        width: min(92px, 78%);
        max-width: 100%;
    }

    .result-actions {
        width: 100%;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .result-actions .secondary-btn {
        width: 100%;
        min-width: 0;
        padding-inline: 6px;
    }

    .upload-actions {
        width: 100%;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .upload-actions .secondary-btn {
        width: 100%;
        min-width: 0;
        padding-inline: 6px;
    }

    .work-panel > .step:first-child {
        overflow: auto;
        overscroll-behavior: contain;
    }
}

@media (max-width: 920px) and (orientation: portrait), (max-width: 1366px) and (pointer: coarse) and (orientation: portrait) {
    .main {
        overflow: hidden;
    }

    .work-panel,
    .result-panel {
        overflow: auto;
        overscroll-behavior: contain;
    }

    .result-panel {
        min-width: 124px;
    }
}

@media (max-width: 640px) and (orientation: portrait) {
    .app {
        padding-inline: max(4px, env(safe-area-inset-left)) max(4px, env(safe-area-inset-right));
        gap: 4px;
    }

    .main {
        grid-template-columns: minmax(242px, 1fr) minmax(124px, .5fr);
    }

    .empty-upload {
        gap: 6px;
    }

    .empty-upload .upload-icon,
    .result-placeholder .upload-icon {
        width: 30px;
        height: 30px;
    }

    .result-brand {
        width: min(62px, 76%);
    }

    .result-actions {
        gap: 3px;
    }

    .result-actions .secondary-btn {
        min-height: 32px;
        height: 32px;
        padding-inline: 3px;
    }

    .result-actions .secondary-btn span {
        display: none;
    }

    .upload-actions .secondary-btn span {
        display: none;
    }

    .upload-actions .secondary-btn {
        min-height: 32px;
        height: 32px;
        padding-inline: 3px;
    }

    .upload-actions .secondary-btn i {
        width: 15px;
        height: 15px;
    }

    .result-actions .secondary-btn i {
        width: 15px;
        height: 15px;
    }
}

@media (max-width: 920px) and (orientation: landscape), (max-width: 1366px) and (max-height: 920px) and (orientation: landscape) {
    .upload-actions .secondary-btn span {
        display: none;
    }
}

@media (max-width: 920px) and (orientation: landscape), (max-width: 1366px) and (max-height: 920px) and (orientation: landscape) {
    .main {
        overflow: auto;
        align-content: start;
    }

    .work-panel {
        overflow: auto;
        overscroll-behavior: contain;
    }

    .result-panel {
        overflow: auto;
        overscroll-behavior: contain;
    }

    .dropzone {
        overflow: auto;
    }
}

@media (max-height: 520px) and (orientation: landscape) {
    .main {
        overflow: auto;
    }

    .work-panel,
    .result-panel {
        overflow: auto;
    }
}

/* Desktop non-fullscreen repair: keep the normal tool usable in ordinary windows. */
@media (min-width: 921px) and (pointer: fine) {
    :root:not([data-app-fullscreen="on"]) .main {
        grid-template-columns: minmax(0, 1.56fr) minmax(300px, .74fr);
        grid-template-rows: minmax(0, 1fr);
        align-content: stretch;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel {
        --settings-grid-h: 48px;
        display: grid;
        grid-template-columns: minmax(260px, .92fr) minmax(260px, 1fr) minmax(240px, .82fr);
        grid-template-rows: minmax(0, 1fr);
        min-height: 0;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step {
        min-height: 0;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child {
        grid-template-rows: auto minmax(250px, 1fr) auto;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        align-content: start;
        gap: 5px;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .step-head,
    :root:not([data-app-fullscreen="on"]) .step-title,
    :root:not([data-app-fullscreen="on"]) .hint {
        min-width: 0;
    }

    :root:not([data-app-fullscreen="on"]) .step-title span:last-child,
    :root:not([data-app-fullscreen="on"]) .hint {
        white-space: normal;
        overflow-wrap: anywhere;
    }

    :root:not([data-app-fullscreen="on"]) .settings,
    :root:not([data-app-fullscreen="on"]) .upload-actions,
    :root:not([data-app-fullscreen="on"]) .result-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions {
        width: 100%;
        margin: 0;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn {
        width: auto;
        min-width: 0;
        padding-inline: 8px;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn {
        flex: 1 1 0;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn span,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn span {
        display: inline;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel {
        min-height: 0;
        grid-template-rows: auto minmax(0, 1fr) auto;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .result-box {
        min-height: 0;
    }
}

@media (min-width: 921px) and (max-width: 1100px) and (pointer: fine) {
    :root:not([data-app-fullscreen="on"]) .main {
        grid-template-columns: minmax(0, 1fr) minmax(270px, .42fr);
        gap: 8px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel {
        grid-template-columns: minmax(205px, .9fr) minmax(225px, 1fr) minmax(188px, .82fr);
        gap: 7px;
        padding: 6px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child {
        grid-template-rows: auto minmax(250px, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn {
        gap: 4px;
        font-size: 10px;
        padding-inline: 6px;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn i,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn i {
        width: 14px;
        height: 14px;
    }
}

/* Orientation correction: landscape keeps the original left/right tool layout; portrait stacks work over result. */
@media (orientation: landscape) {
    .main {
        grid-template-columns: minmax(0, 1.56fr) minmax(260px, .68fr);
        grid-template-rows: minmax(0, 1fr);
        align-content: stretch;
        overflow: hidden;
    }

    .work-panel {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(320px, 1fr) minmax(168px, .52fr) minmax(110px, .34fr);
        min-height: 0;
        overflow: hidden;
    }

    .result-panel {
        min-height: 0;
        grid-template-rows: auto minmax(0, 1fr) auto;
        overflow: hidden;
    }

    .result-box {
        min-height: 0;
    }
}

@media (orientation: landscape) and (max-width: 920px) {
    .main {
        grid-template-columns: minmax(0, 1fr) minmax(222px, .36fr);
        grid-template-rows: minmax(0, 1fr);
        gap: 4px;
        overflow: hidden;
    }

    .work-panel {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(250px, .72fr) minmax(118px, .38fr) minmax(92px, .28fr);
        gap: 5px;
        padding: 5px;
        height: 100%;
        align-content: stretch;
        overflow: auto;
    }

    .work-panel > .step:first-child {
        min-height: 0;
        grid-template-rows: auto minmax(250px, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }

    .upload-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 4px;
        margin: 0;
        width: 100%;
    }

    .upload-actions .secondary-btn {
        width: 100%;
        min-width: 0;
        min-height: 29px;
        height: 29px;
        padding-inline: 3px;
    }

    .work-panel > .step:nth-of-type(2),
    .work-panel > .step:nth-of-type(3) {
        min-height: 0;
    }

    .work-panel > .step:nth-of-type(2) .step-head {
        gap: 4px;
    }

    .work-panel > .step:nth-of-type(2) .step-title {
        gap: 5px;
    }

    .mode-switch {
        margin-left: 2px;
        padding: 2px;
        gap: 2px;
    }

    .mode-switch-btn {
        min-height: 24px;
        padding-inline: 6px;
        font-size: 10px;
    }

    .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 3px;
        padding: 0;
    }

    .quick-btn {
        min-height: 24px;
        padding: 2px 3px;
        font-size: 10px;
        line-height: 1.15;
    }

    .prompt-box {
        --mode-param-h: 44px;
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.35em + 16px), 1fr);
        gap: 4px;
    }

    .result-panel {
        min-width: 0;
        min-height: 0;
        overflow: hidden;
    }

    .result-actions {
        gap: 3px;
    }

    .result-actions .secondary-btn {
        min-width: 0;
        padding-inline: 3px;
    }

    .result-actions .secondary-btn span {
        display: none;
    }
}

@media (orientation: portrait) {
    .main {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(0, 1fr) minmax(120px, .26fr);
        align-content: stretch;
        overflow: hidden;
    }

    .work-panel {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(250px, 1fr) minmax(132px, .54fr) minmax(116px, .42fr);
        min-height: 0;
        overflow: hidden;
    }

    .work-panel > .step:first-child {
        min-height: 0;
        grid-template-rows: auto minmax(250px, 1fr) auto;
    }

    .work-panel > .step:first-child .dropzone {
        min-height: 250px;
    }

    .work-panel > .step:nth-of-type(2),
    .work-panel > .step:nth-of-type(3) {
        min-height: 0;
    }

    .result-panel {
        min-height: 0;
        grid-template-rows: auto minmax(0, 1fr) auto;
        overflow: hidden;
    }

    .result-box {
        min-height: 0;
    }
}

@media (orientation: portrait) and (max-width: 640px) {
    .main {
        grid-template-rows: minmax(0, 1fr) minmax(154px, .24fr);
        gap: 4px;
    }

    .work-panel {
        grid-template-rows: minmax(250px, 1fr) minmax(118px, .38fr) minmax(104px, .34fr);
        gap: 5px;
        padding: 5px;
    }

    .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
        overflow: hidden;
    }

    .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        overflow: hidden;
    }

    .work-panel > .step:first-child {
        overflow: hidden;
    }

    .upload-actions {
        margin: 0;
        width: 100%;
    }

    .result-panel {
        min-height: 154px;
    }
}

@media (orientation: portrait) and (max-width: 640px) {
    .app {
        padding-top: max(3px, env(safe-area-inset-top));
        padding-bottom: max(3px, env(safe-area-inset-bottom));
        gap: 3px;
    }

    .topbar {
        min-height: 34px;
    }

    .work-panel {
        grid-template-rows: 306px minmax(188px, 1fr) minmax(112px, .34fr);
    }

    .work-panel > .step:first-child {
        grid-template-rows: auto minmax(250px, 1fr) auto;
    }

    .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 3px;
        padding: 0;
    }

    .quick-btn {
        min-height: 24px;
        padding: 2px 3px;
        font-size: 10px;
        line-height: 1.15;
    }

    .prompt-box {
        --mode-param-h: 44px;
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.35em + 16px), 1fr);
        gap: 4px;
    }

    .mode-controls,
    .mode-extra {
        gap: 4px;
    }

    .upload-actions .secondary-btn {
        min-height: 29px;
        height: 29px;
    }

    .work-panel > .step:nth-of-type(3) {
        --settings-grid-h: 38px;
        --message-row-h: 11px;
        --generate-row-h: 26px;
    }

    .work-panel > .step:nth-of-type(3) .settings,
    .work-panel > .step:nth-of-type(3) .settings > .field {
        min-height: 38px;
    }

    .main {
        grid-template-rows: minmax(0, 1fr) minmax(148px, .22fr);
    }

    .result-panel {
        min-height: 148px;
        gap: 3px;
        padding: 4px;
    }

    .result-actions .secondary-btn {
        min-height: 26px;
        height: 26px;
    }

    .result-placeholder {
        gap: 2px;
        padding: 2px;
    }

    .result-brand {
        width: min(54px, 70%);
    }

    .result-placeholder .result-contact {
        margin-top: 1px;
    }
}

/* Final structure lock: landscape uses two large columns; the left column stacks sections 1, 2, 3 vertically. */
@media (orientation: landscape) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(309px, .7fr) minmax(204px, .5fr) minmax(112px, .28fr);
        align-content: stretch;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child {
        grid-template-rows: auto minmax(251px, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child .dropzone {
        min-height: 251px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        min-height: 0;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: 42px;
        --settings-grid-h: 40px;
        --generate-row-h: 28px;
        --message-row-h: 24px;
        --step-gap: 4px;
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) minmax(0, 1fr) var(--message-row-h) var(--generate-row-h);
        gap: 4px;
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
    :root[data-app-fullscreen="on"] .result-panel.has-variants {
        grid-template-rows: auto minmax(0, 72svh) var(--variant-strip-h) auto;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions,
    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .upload-actions,
    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn {
        height: 28px;
        min-height: 28px;
    }

    :root:not([data-app-fullscreen="on"]) .quick-grid,
    :root[data-app-fullscreen="on"] .quick-grid {
        gap: 4px;
        padding: 0;
    }

    :root:not([data-app-fullscreen="on"]) .quick-btn,
    :root[data-app-fullscreen="on"] .quick-btn {
        min-height: 22px;
        padding: 2px 5px;
        line-height: 1.15;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.25em + 12px), 1fr);
        gap: 4px;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .mode-controls,
    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root[data-app-fullscreen="on"] .mode-controls,
    :root[data-app-fullscreen="on"] .mode-extra {
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root:not([data-app-fullscreen="on"]) textarea,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] textarea,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: calc(3 * 1.25em + 12px);
        line-height: 1.25;
    }

    :root:not([data-app-fullscreen="on"]) textarea,
    :root[data-app-fullscreen="on"] textarea {
        padding: 5px 7px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group .field,
    :root:not([data-app-fullscreen="on"]) .settings > .field,
    :root[data-app-fullscreen="on"] .mode-control-group .field,
    :root[data-app-fullscreen="on"] .settings > .field {
        gap: 2px;
        padding: 2px 5px;
        grid-template-rows: 10px minmax(0, 24px);
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group .field label,
    :root:not([data-app-fullscreen="on"]) .settings > .field label,
    :root[data-app-fullscreen="on"] .mode-control-group .field label,
    :root[data-app-fullscreen="on"] .settings > .field label {
        line-height: 10px;
        font-size: 10px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group select,
    :root:not([data-app-fullscreen="on"]) .settings select,
    :root[data-app-fullscreen="on"] .mode-control-group select,
    :root[data-app-fullscreen="on"] .settings select {
        height: 24px;
        min-height: 24px;
    }

    :root:not([data-app-fullscreen="on"]) .settings,
    :root[data-app-fullscreen="on"] .settings {
        gap: 5px;
        padding: 0;
        min-height: var(--settings-grid-h);
    }

    :root:not([data-app-fullscreen="on"]) .settings > .field,
    :root[data-app-fullscreen="on"] .settings > .field {
        min-height: var(--settings-grid-h);
    }

    :root:not([data-app-fullscreen="on"]) .generate-row,
    :root[data-app-fullscreen="on"] .generate-row {
        gap: 5px;
        height: var(--generate-row-h);
    }

    :root:not([data-app-fullscreen="on"]) .generate-row .primary-btn,
    :root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field,
    :root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field select,
    :root[data-app-fullscreen="on"] .generate-row .primary-btn,
    :root[data-app-fullscreen="on"] .generate-row > .concurrency-field,
    :root[data-app-fullscreen="on"] .generate-row > .concurrency-field select {
        height: var(--generate-row-h);
        min-height: var(--generate-row-h);
    }

    :root:not([data-app-fullscreen="on"]) .message,
    :root[data-app-fullscreen="on"] .message {
        height: var(--message-row-h);
        line-height: var(--message-row-h);
        padding: 0 6px;
    }
}

/* Mobile portrait balance: keep the upload preview and result preview the same visual height. */
@media (orientation: portrait) and (max-width: 640px) {
    .main {
        grid-template-rows: minmax(0, 1fr) minmax(236px, .28fr);
        gap: 4px;
    }

    .work-panel {
        --mode-param-h: 38px;
        --settings-grid-h: 38px;
        --generate-row-h: 28px;
        --message-row-h: 12px;
        --step-gap: 4px;
        grid-template-rows: 238px 190px 112px;
        gap: 5px;
    }

    .work-panel > .step:first-child {
        grid-template-rows: auto 180px auto;
    }

    .work-panel > .step:first-child .dropzone {
        height: 180px;
        min-height: 180px;
    }

    .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
        gap: 4px;
    }

    .quick-grid {
        gap: 4px;
        padding: 0;
    }

    .quick-btn {
        min-height: 20px;
        padding: 2px 4px;
        line-height: 1.12;
    }

    .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.2em + 10px), 1fr);
        gap: 4px;
        overflow: hidden;
    }

    .mode-extra,
    textarea,
    #prompt {
        min-height: calc(3 * 1.2em + 10px);
        line-height: 1.2;
    }

    textarea {
        padding: 5px 7px;
    }

    .mode-control-group .field,
    .settings > .field {
        gap: 2px;
        padding: 2px 5px;
        grid-template-rows: 9px minmax(0, 24px);
    }

    .mode-control-group select,
    .settings select {
        height: 23px;
        min-height: 23px;
    }

    .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        gap: 4px;
    }

    .settings {
        min-height: var(--settings-grid-h);
        gap: 5px;
        padding: 0;
    }

    .settings > .field {
        min-height: var(--settings-grid-h);
    }

    .generate-row,
    .generate-row .primary-btn,
    .generate-row > .concurrency-field,
    .generate-row > .concurrency-field select {
        height: var(--generate-row-h);
        min-height: var(--generate-row-h);
    }

    .message {
        height: var(--message-row-h);
        line-height: var(--message-row-h);
        padding: 0 6px;
    }

    .result-panel {
        min-height: 236px;
        grid-template-rows: auto 180px auto;
        gap: 4px;
    }

    .result-box {
        height: 180px;
        min-height: 180px;
    }
}

@media (orientation: landscape) and (min-width: 1400px) and (min-height: 900px) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: 58px;
        --settings-grid-h: 46px;
        --message-row-h: 24px;
        grid-template-rows: minmax(309px, 1fr) minmax(188px, .64fr) 140px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
    :root[data-app-fullscreen="on"] .result-panel.has-variants {
        --variant-strip-h: 76px;
        --variant-card-w: 84px;
        grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) auto;
    }

    :root:not([data-app-fullscreen="on"]) .quick-btn,
    :root[data-app-fullscreen="on"] .quick-btn {
        min-height: 24px;
        padding: 3px 6px;
        line-height: 1.2;
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group .field,
    :root[data-app-fullscreen="on"] .mode-control-group .field {
        gap: 4px;
        padding: 4px 7px;
        grid-template-rows: 14px minmax(0, 30px);
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group .field label,
    :root[data-app-fullscreen="on"] .mode-control-group .field label {
        line-height: 14px;
        font-size: 12px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group select,
    :root[data-app-fullscreen="on"] .mode-control-group select {
        height: 30px;
        min-height: 30px;
        line-height: 1.2;
        font-size: 13px;
    }

    :root:not([data-app-fullscreen="on"]) .settings > .field,
    :root[data-app-fullscreen="on"] .settings > .field {
        gap: 2px;
        padding: 2px 5px;
        grid-template-rows: 14px minmax(0, 26px);
    }

    :root:not([data-app-fullscreen="on"]) .settings > .field label,
    :root[data-app-fullscreen="on"] .settings > .field label {
        line-height: 14px;
        font-size: 12px;
    }

    :root:not([data-app-fullscreen="on"]) .settings select,
    :root[data-app-fullscreen="on"] .settings select {
        height: 26px;
        min-height: 26px;
        line-height: 1.2;
        font-size: 13px;
    }
}

/* Normal/fullscreen parity: the ordinary window uses the same one-screen shell and structure as fullscreen. */
:root:not([data-app-fullscreen="on"]) body {
    overflow: hidden;
    background: var(--bg);
}

:root:not([data-app-fullscreen="on"]) .app {
    max-width: none;
    width: 100%;
    height: var(--app-viewport-h);
    min-height: 0;
    overflow: hidden;
    padding:
        max(4px, env(safe-area-inset-top))
        max(4px, env(safe-area-inset-right))
        max(4px, env(safe-area-inset-bottom))
        max(4px, env(safe-area-inset-left));
    gap: 6px;
}

:root:not([data-app-fullscreen="on"]) .topbar {
    min-height: 40px;
}

:root:not([data-app-fullscreen="on"]) .main {
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

:root:not([data-app-fullscreen="on"]) .work-panel,
:root:not([data-app-fullscreen="on"]) .result-panel {
    min-height: 0;
    overflow: hidden;
}

@media (orientation: landscape) {
    :root:not([data-app-fullscreen="on"]) .main {
        grid-template-columns: minmax(0, 1.56fr) minmax(260px, .68fr);
        grid-template-rows: minmax(0, 1fr);
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(309px, .7fr) minmax(204px, .5fr) minmax(112px, .28fr);
        align-content: stretch;
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child {
        grid-template-rows: auto minmax(251px, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone {
        min-height: 251px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) minmax(0, 1fr) var(--message-row-h) var(--generate-row-h);
        align-content: stretch;
    }
}

@media (orientation: landscape) and (min-width: 1400px) and (min-height: 900px) {
    :root:not([data-app-fullscreen="on"]) .work-panel {
        grid-template-rows: minmax(309px, 1fr) minmax(204px, .72fr) 128px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
    }
}

@media (orientation: landscape) and (min-width: 2200px) and (min-height: 1200px) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --generate-row-h: 54px;
        --message-row-h: var(--settings-grid-h);
        grid-template-rows: minmax(309px, 1fr) minmax(170px, .56fr) 196px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
    }

    :root:not([data-app-fullscreen="on"]) .generate-row,
    :root:not([data-app-fullscreen="on"]) .generate-row .primary-btn,
    :root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field,
    :root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field select,
    :root[data-app-fullscreen="on"] .generate-row,
    :root[data-app-fullscreen="on"] .generate-row .primary-btn,
    :root[data-app-fullscreen="on"] .generate-row > .concurrency-field,
    :root[data-app-fullscreen="on"] .generate-row > .concurrency-field select {
        height: var(--generate-row-h);
        min-height: var(--generate-row-h);
    }

    :root:not([data-app-fullscreen="on"]) .generate-row,
    :root[data-app-fullscreen="on"] .generate-row {
        transform: none;
    }
}

@media (orientation: landscape) and (max-height: 520px) {
    :root:not([data-app-fullscreen="on"]) .app,
    :root[data-app-fullscreen="on"] .app {
        padding:
            max(2px, env(safe-area-inset-top))
            max(2px, env(safe-area-inset-right))
            max(2px, env(safe-area-inset-bottom))
            max(2px, env(safe-area-inset-left));
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .topbar,
    :root[data-app-fullscreen="on"] .topbar {
        min-height: 30px;
    }

    :root:not([data-app-fullscreen="on"]) .brand,
    :root[data-app-fullscreen="on"] .brand {
        gap: 6px;
    }

    :root:not([data-app-fullscreen="on"]) .brand-mark,
    :root:not([data-app-fullscreen="on"]) .brand-logo,
    :root[data-app-fullscreen="on"] .brand-mark,
    :root[data-app-fullscreen="on"] .brand-logo {
        width: 28px;
        height: 28px;
    }

    :root:not([data-app-fullscreen="on"]) .brand h1,
    :root[data-app-fullscreen="on"] .brand h1 {
        font-size: 14px;
        line-height: 1;
    }

    :root:not([data-app-fullscreen="on"]) .brand p,
    :root[data-app-fullscreen="on"] .brand p {
        display: none;
    }

    :root:not([data-app-fullscreen="on"]) .top-actions,
    :root[data-app-fullscreen="on"] .top-actions {
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .icon-btn,
    :root:not([data-app-fullscreen="on"]) .text-btn,
    :root[data-app-fullscreen="on"] .icon-btn,
    :root[data-app-fullscreen="on"] .text-btn {
        min-height: 28px;
        height: 28px;
        padding: 0 7px;
        font-size: 10px;
    }

    :root:not([data-app-fullscreen="on"]) .icon-btn,
    :root[data-app-fullscreen="on"] .icon-btn {
        width: 28px;
    }

    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        grid-template-columns: minmax(0, 1.56fr) minmax(230px, .68fr);
        grid-template-rows: minmax(0, 1fr);
        gap: 4px;
        width: calc(100% - 4px);
        height: calc(100% - 4px);
        margin: 0 auto 2px;
        align-self: start;
        justify-self: center;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .work-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        padding: 4px;
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: 36px;
        --settings-grid-h: 30px;
        --generate-row-h: 22px;
        --message-row-h: 14px;
        --step-gap: 2px;
        --upload-frame-offset: calc(18px + var(--step-gap));
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(110px, 1fr) minmax(82px, .62fr) 106px;
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .step-head,
    :root:not([data-app-fullscreen="on"]) .result-head,
    :root[data-app-fullscreen="on"] .step-head,
    :root[data-app-fullscreen="on"] .result-head {
        min-height: 18px;
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .step-title,
    :root[data-app-fullscreen="on"] .step-title {
        gap: 4px;
        font-size: 10px;
        line-height: 1;
    }

    :root:not([data-app-fullscreen="on"]) .step-badge,
    :root[data-app-fullscreen="on"] .step-badge {
        width: 16px;
        height: 16px;
        font-size: 9px;
    }

    :root:not([data-app-fullscreen="on"]) .hint,
    :root:not([data-app-fullscreen="on"]) label,
    :root:not([data-app-fullscreen="on"]) .status-pill,
    :root:not([data-app-fullscreen="on"]) .message,
    :root[data-app-fullscreen="on"] .hint,
    :root[data-app-fullscreen="on"] label,
    :root[data-app-fullscreen="on"] .status-pill,
    :root[data-app-fullscreen="on"] .message {
        font-size: 8px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child {
        grid-template-rows: auto minmax(0, 1fr) 24px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child .dropzone {
        min-height: 0;
        padding: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .empty-upload,
    :root[data-app-fullscreen="on"] .empty-upload {
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .upload-icon,
    :root[data-app-fullscreen="on"] .upload-icon {
        width: 24px;
        height: 24px;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions,
    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .upload-actions,
    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn {
        height: 24px;
        min-height: 24px;
        gap: 4px;
        padding-inline: 6px;
        font-size: 9px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .quick-grid,
    :root[data-app-fullscreen="on"] .quick-grid {
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .quick-btn,
    :root[data-app-fullscreen="on"] .quick-btn {
        min-height: 18px;
        padding: 1px 4px;
        font-size: 8px;
        line-height: 1;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.1em + 6px), 1fr);
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-controls,
    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root[data-app-fullscreen="on"] .mode-controls,
    :root[data-app-fullscreen="on"] .mode-extra {
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group .field,
    :root:not([data-app-fullscreen="on"]) .settings > .field,
    :root[data-app-fullscreen="on"] .mode-control-group .field,
    :root[data-app-fullscreen="on"] .settings > .field {
        gap: 1px;
        padding: 1px 4px;
        grid-template-rows: 8px minmax(0, 19px);
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group .field label,
    :root:not([data-app-fullscreen="on"]) .settings > .field label,
    :root[data-app-fullscreen="on"] .mode-control-group .field label,
    :root[data-app-fullscreen="on"] .settings > .field label {
        line-height: 8px;
        font-size: 8px;
    }

    :root:not([data-app-fullscreen="on"]) .mode-control-group select,
    :root:not([data-app-fullscreen="on"]) .settings select,
    :root[data-app-fullscreen="on"] .mode-control-group select,
    :root[data-app-fullscreen="on"] .settings select {
        height: 19px;
        min-height: 19px;
        font-size: 9px;
        padding-inline: 5px;
    }

    :root:not([data-app-fullscreen="on"]) textarea,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] textarea,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: calc(3 * 1.1em + 6px);
        padding: 3px 5px;
        font-size: 9px;
        line-height: 1.1;
    }

    :root:not([data-app-fullscreen="on"]) .settings,
    :root[data-app-fullscreen="on"] .settings {
        min-height: var(--settings-grid-h);
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .generate-row,
    :root:not([data-app-fullscreen="on"]) .generate-row .primary-btn,
    :root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field,
    :root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field select,
    :root[data-app-fullscreen="on"] .generate-row,
    :root[data-app-fullscreen="on"] .generate-row .primary-btn,
    :root[data-app-fullscreen="on"] .generate-row > .concurrency-field,
    :root[data-app-fullscreen="on"] .generate-row > .concurrency-field select {
        height: var(--generate-row-h);
        min-height: var(--generate-row-h);
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        grid-template-rows: auto minmax(0, 1fr) 30px;
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .result-box,
    :root[data-app-fullscreen="on"] .result-box {
        min-height: 0;
        height: auto;
    }

    :root:not([data-app-fullscreen="on"]) .result-actions,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .result-actions,
    :root[data-app-fullscreen="on"] .result-actions .secondary-btn {
        height: 30px;
        min-height: 30px;
        gap: 4px;
        padding-inline: 6px;
        font-size: 9px;
    }

    :root:not([data-app-fullscreen="on"]) .message,
    :root[data-app-fullscreen="on"] .message {
        height: var(--message-row-h);
        line-height: calc(var(--message-row-h) - 2px);
        padding: 1px 6px;
        align-self: stretch;
    }
}

.mode-extra.has-aggressive {
    grid-template-rows: minmax(0, 1fr);
    align-content: stretch;
    position: relative;
}

.mode-extra.has-aggressive .aggressive-toggle {
    position: absolute;
    left: 10px;
    top: 10px;
    z-index: 2;
    justify-self: auto;
    width: 86px;
    min-height: 28px;
}

.mode-extra.has-aggressive textarea {
    padding-left: 112px;
}

:root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
:root[data-app-fullscreen="on"] .result-panel.has-variants {
    grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) auto;
}

/* Repair contract: keep the confirmed tool layout stable in normal and fullscreen modes. */
body {
    overflow: hidden;
}

:root:not([data-app-fullscreen="on"]) .app,
:root[data-app-fullscreen="on"] .app {
    width: 100%;
    max-width: none;
    height: var(--app-viewport-h);
    min-height: 0;
    overflow: hidden;
}

:root:not([data-app-fullscreen="on"]) .main,
:root[data-app-fullscreen="on"] .main,
:root:not([data-app-fullscreen="on"]) .work-panel,
:root[data-app-fullscreen="on"] .work-panel,
:root:not([data-app-fullscreen="on"]) .result-panel,
:root[data-app-fullscreen="on"] .result-panel,
:root:not([data-app-fullscreen="on"]) .work-panel > .step,
:root[data-app-fullscreen="on"] .work-panel > .step {
    min-height: 0;
    overflow: hidden;
}

@media (orientation: landscape) {
    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        display: grid;
        grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr);
        grid-template-rows: minmax(0, 1fr);
        gap: clamp(4px, .55vw, 14px);
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: clamp(36px, 5.5vh, 58px);
        --settings-grid-h: clamp(34px, 4.7vh, 56px);
        --message-row-h: clamp(16px, 2.35vh, 28px);
        --generate-row-h: clamp(28px, 4.5vh, 46px);
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(170px, 1fr) minmax(120px, .48fr) minmax(clamp(126px, 17vh, 174px), .34fr);
        gap: clamp(3px, .45vh, 8px);
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child .dropzone {
        min-height: 0;
        height: 100%;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        display: grid;
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        gap: clamp(3px, .38vh, 6px);
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
    :root[data-app-fullscreen="on"] .result-panel.has-variants {
        grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) auto;
    }
}

@media (orientation: landscape) and (min-width: 2200px) and (min-height: 1200px) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --generate-row-h: 54px;
        --message-row-h: 34px;
        --settings-grid-h: 66px;
        --mode-param-h: 76px;
        grid-template-rows: minmax(360px, 1fr) minmax(250px, .55fr) minmax(174px, .28fr);
    }
}

:root:not([data-app-fullscreen="on"]) .mode-control-group .field,
:root:not([data-app-fullscreen="on"]) .settings > .field,
:root[data-app-fullscreen="on"] .mode-control-group .field,
:root[data-app-fullscreen="on"] .settings > .field {
    overflow: hidden;
}

:root:not([data-app-fullscreen="on"]) .mode-control-group .field label,
:root:not([data-app-fullscreen="on"]) .settings > .field label,
:root[data-app-fullscreen="on"] .mode-control-group .field label,
:root[data-app-fullscreen="on"] .settings > .field label {
    position: relative;
    z-index: 1;
    display: block;
    min-height: 1em;
    line-height: 1.15;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

:root:not([data-app-fullscreen="on"]) .settings,
:root[data-app-fullscreen="on"] .settings,
:root:not([data-app-fullscreen="on"]) .mode-control-group,
:root[data-app-fullscreen="on"] .mode-control-group {
    min-height: 0;
    overflow: hidden;
}

:root:not([data-app-fullscreen="on"]) .settings select,
:root:not([data-app-fullscreen="on"]) .mode-control-group select,
:root[data-app-fullscreen="on"] .settings select,
:root[data-app-fullscreen="on"] .mode-control-group select {
    min-height: 0;
}

:root:not([data-app-fullscreen="on"]) .generate-row,
:root[data-app-fullscreen="on"] .generate-row {
    align-items: end;
    height: var(--generate-row-h);
    min-height: var(--generate-row-h);
}

:root:not([data-app-fullscreen="on"]) .generate-row .primary-btn,
:root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field,
:root:not([data-app-fullscreen="on"]) .generate-row > .concurrency-field select,
:root[data-app-fullscreen="on"] .generate-row .primary-btn,
:root[data-app-fullscreen="on"] .generate-row > .concurrency-field,
:root[data-app-fullscreen="on"] .generate-row > .concurrency-field select {
    height: var(--generate-row-h);
    min-height: var(--generate-row-h);
}

:root:not([data-app-fullscreen="on"]) .message,
:root[data-app-fullscreen="on"] .message {
    display: block;
    visibility: visible;
    position: static;
    height: var(--message-row-h);
    min-height: var(--message-row-h);
    line-height: calc(var(--message-row-h) - 2px);
    padding-block: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mode-extra.has-aggressive {
    position: relative;
}

.mode-extra.has-aggressive .aggressive-toggle {
    left: clamp(6px, .8vw, 14px);
    top: clamp(6px, .8vh, 14px);
    width: clamp(78px, 8vw, 132px);
    min-height: clamp(24px, 3.2vh, 36px);
}

.mode-extra.has-aggressive textarea {
    padding-left: clamp(96px, 10vw, 152px);
}

@media (orientation: portrait) {
    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(0, 1fr) minmax(190px, .36fr);
        gap: 5px;
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: 38px;
        --settings-grid-h: 38px;
        --message-row-h: 16px;
        --generate-row-h: 30px;
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(250px, 1fr) minmax(156px, .52fr) minmax(104px, .25fr);
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child .dropzone {
        min-height: 0;
        height: 100%;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        grid-template-rows: auto minmax(0, 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.2em + 10px), 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: calc(3 * 1.2em + 10px);
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
        min-height: 0;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
    :root[data-app-fullscreen="on"] .result-panel.has-variants {
        --variant-strip-h: 68px;
        grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) auto;
    }
}

@media (orientation: portrait) and (max-width: 520px) {
    :root:not([data-app-fullscreen="on"]) .app,
    :root[data-app-fullscreen="on"] .app {
        padding: max(3px, env(safe-area-inset-top)) max(3px, env(safe-area-inset-right)) max(3px, env(safe-area-inset-bottom)) max(3px, env(safe-area-inset-left));
        gap: 4px;
    }

    :root:not([data-app-fullscreen="on"]) .topbar,
    :root[data-app-fullscreen="on"] .topbar {
        min-height: 34px;
    }

    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        grid-template-rows: minmax(0, 1fr) minmax(172px, .32fr);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: 34px;
        --settings-grid-h: 34px;
        --message-row-h: 14px;
        --generate-row-h: 28px;
        grid-template-rows: minmax(250px, 1fr) minmax(132px, .48fr) minmax(96px, .24fr);
    }

    .mode-extra.has-aggressive .aggressive-toggle {
        width: 76px;
        min-height: 22px;
    }

    .mode-extra.has-aggressive textarea {
        padding-left: 88px;
    }
}

@media (orientation: landscape) and (max-height: 560px) {
    :root:not([data-app-fullscreen="on"]) .topbar,
    :root[data-app-fullscreen="on"] .topbar {
        min-height: 30px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: 34px;
        --settings-grid-h: 30px;
        --message-row-h: 12px;
        --generate-row-h: 24px;
        grid-template-rows: minmax(104px, .78fr) minmax(96px, .7fr) minmax(86px, .42fr);
        gap: 3px;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto var(--settings-grid-h) 0 var(--message-row-h) var(--generate-row-h);
        gap: 2px;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(calc(3 * 1.05em + 6px), 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: calc(3 * 1.05em + 6px);
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        grid-template-rows: auto minmax(0, 1fr) auto;
    }

    :root:not([data-app-fullscreen="on"]) .result-box,
    :root[data-app-fullscreen="on"] .result-box {
        min-height: 0;
        height: auto;
        overflow: hidden;
    }
}

@media (orientation: portrait) and (max-width: 520px) {
    :root:not([data-app-fullscreen="on"]) .result-box,
    :root[data-app-fullscreen="on"] .result-box {
        min-height: 0;
        height: auto;
        overflow: hidden;
    }
}

/* Final step-3 fit: keep status text in the strip between selectors and the generate row. */
:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
    --status-chip-h: 20px;
    grid-template-rows: auto max-content var(--status-chip-h) var(--generate-row-h) !important;
    gap: var(--step-gap) !important;
    align-content: start !important;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3).has-message,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3).has-message {
    grid-template-rows: auto max-content var(--status-chip-h) var(--generate-row-h) !important;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) .settings,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) .settings {
    height: auto !important;
    min-height: 0 !important;
    align-self: start !important;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) .settings > .field,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) .settings > .field {
    height: auto !important;
    min-height: 0 !important;
    align-content: start !important;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) .message,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) .message {
    display: none;
    grid-row: 3;
    position: static;
    align-self: start;
    height: var(--status-chip-h);
    min-height: 0;
    margin: 0 6px;
    padding: 0 8px;
    border: 0;
    line-height: var(--status-chip-h);
    font-size: 12px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) .message.show,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) .message.show {
    display: block;
    grid-row: 3;
    position: static;
    align-self: start;
    z-index: 4;
    height: var(--status-chip-h);
    min-height: 0;
    margin: 0 6px;
    padding: 0 8px;
    border: 0;
    line-height: var(--status-chip-h);
    font-size: 12px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    opacity: 1;
    visibility: visible;
    pointer-events: none;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3) .generate-row,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) .generate-row {
    grid-row: 4;
}

:root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3).has-message .generate-row,
:root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3).has-message .generate-row {
    grid-row: 4;
}

@media (orientation: landscape) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --step-gap: 3px;
        --settings-grid-h: 40px;
        --generate-row-h: var(--bottom-action-h);
        grid-template-rows: minmax(170px, 1fr) minmax(120px, .48fr) max-content;
        gap: 3px;
    }
}

@media (orientation: landscape) and (min-width: 2200px) and (min-height: 1200px) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --step-gap: 8px;
        --settings-grid-h: 66px;
        --generate-row-h: 54px;
        grid-template-rows: minmax(360px, 1fr) minmax(250px, .55fr) max-content;
        gap: 8px;
    }
}

@media (orientation: landscape) and (max-height: 560px) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        grid-template-rows: minmax(104px, .78fr) minmax(96px, .7fr) max-content;
    }
}

@media (orientation: portrait) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        grid-template-rows: minmax(250px, 1fr) minmax(156px, .52fr) max-content;
    }
}

@media (orientation: portrait) and (max-width: 520px) {
    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        grid-template-rows: minmax(250px, 1fr) minmax(132px, .48fr) max-content;
    }
}

/* Expert mode without visible parameters should give the freed row back to the prompt. */
:root:not([data-app-fullscreen="on"]) .prompt-box.no-param,
:root[data-app-fullscreen="on"] .prompt-box.no-param,
.prompt-box.no-param {
    grid-template-rows: auto minmax(0, 1fr);
}

:root:not([data-app-fullscreen="on"]) .prompt-box.no-param .mode-extra,
:root[data-app-fullscreen="on"] .prompt-box.no-param .mode-extra,
.prompt-box.no-param .mode-extra {
    grid-row: 2;
    min-height: 0;
}

/* Tablet and portrait contract: keep the functional blocks aligned while only
   upload, prompt text, and result preview absorb viewport-height changes. */
@media (orientation: portrait) {
    :root:not([data-app-fullscreen="on"]),
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: clamp(6px, .85svh, 14px);
        --tablet-upload-h: clamp(230px, 23svh, 720px);
        --tablet-result-h: calc(var(--tablet-upload-h) + 40px);
        --tablet-prompt-min-h: calc(3 * 1.35em + 10px);
        --tablet-action-h: 41px;
        --bottom-action-h: var(--tablet-action-h);
    }

    :root:not([data-app-fullscreen="on"]) .app,
    :root[data-app-fullscreen="on"] .app {
        gap: var(--tablet-block-gap);
    }

    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows:
            minmax(var(--tablet-upload-h), var(--tablet-upload-h))
            max-content
            max-content
            minmax(var(--tablet-result-h), var(--tablet-result-h));
        gap: var(--tablet-block-gap);
        align-content: stretch;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --step-gap: clamp(5px, .65svh, 10px);
        --mode-param-h: clamp(38px, 4.6svh, 64px);
        --settings-grid-h: clamp(40px, 4.4svh, 58px);
        --generate-row-h: var(--tablet-action-h);
        --message-row-h: 0px;
        display: contents;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step,
    :root[data-app-fullscreen="on"] .work-panel > .step,
    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        width: 100%;
        min-width: 0;
        min-height: 0;
        margin: 0;
        padding: var(--compact-panel-pad);
        border: 1px solid var(--panel-border);
        border-radius: var(--radius);
        background: var(--panel-fill);
        box-shadow: var(--shadow);
        overflow: hidden;
    }

    :root[data-theme="night"]:not([data-app-fullscreen="on"]) .work-panel > .step,
    :root[data-theme="night"][data-app-fullscreen="on"] .work-panel > .step,
    :root[data-theme="night"]:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-theme="night"][data-app-fullscreen="on"] .result-panel {
        background:
            linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .012)),
            var(--panel-fill);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child {
        grid-row: 1;
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
        border-color: var(--panel-border);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child::before,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child::before {
        top: calc(var(--compact-panel-pad) + 24px + var(--step-gap));
        right: var(--compact-panel-pad);
        bottom: var(--compact-panel-pad);
        left: var(--compact-panel-pad);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child .dropzone,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child .dropzone {
        min-height: 0;
        height: 100%;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        grid-row: 2;
        display: grid;
        grid-template-rows: auto minmax(0, 1fr);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-row: 3;
        display: grid;
        grid-template-rows: auto max-content var(--status-chip-h) var(--generate-row-h) !important;
        gap: var(--step-gap) !important;
        align-content: start !important;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(var(--tablet-prompt-min-h), 1fr);
        min-height: 0;
    }

    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: var(--tablet-prompt-min-h);
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        grid-row: 4;
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
        gap: var(--step-gap);
        height: var(--tablet-result-h);
        align-self: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
    :root[data-app-fullscreen="on"] .result-panel.has-variants {
        --variant-strip-h: clamp(70px, 8svh, 150px);
        grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) auto;
    }

    :root:not([data-app-fullscreen="on"]) .result-box,
    :root[data-app-fullscreen="on"] .result-box {
        min-height: 0;
        height: auto;
        margin: 0 !important;
        overflow: hidden !important;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions,
    :root:not([data-app-fullscreen="on"]) .result-actions,
    :root[data-app-fullscreen="on"] .upload-actions,
    :root[data-app-fullscreen="on"] .result-actions {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: clamp(5px, .75vw, 10px);
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .result-actions .secondary-btn {
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
        width: 100%;
        min-width: 0;
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn span,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn span,
    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn span,
    :root[data-app-fullscreen="on"] .result-actions .secondary-btn span {
        display: inline;
    }
}

@media (orientation: portrait) and (min-width: 1600px) and (min-height: 2400px) {
    :root:not([data-app-fullscreen="on"]),
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: clamp(14px, .75svh, 28px);
        --tablet-upload-h: clamp(560px, 18svh, 760px);
        --tablet-action-h: 54px;
        --compact-panel-pad: 18px;
    }
}

@media (orientation: portrait) and (max-width: 900px) {
    :root:not([data-app-fullscreen="on"]),
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: clamp(5px, .62svh, 8px);
        --tablet-upload-h: clamp(225px, 23svh, 280px);
        --tablet-action-h: 41px;
    }

    :root:not([data-app-fullscreen="on"]) .topbar,
    :root[data-app-fullscreen="on"] .topbar {
        min-height: 38px;
    }
}

@media (orientation: portrait) and (max-width: 520px) {
    :root:not([data-app-fullscreen="on"]),
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: 5px;
        --tablet-upload-h: clamp(170px, 18svh, 210px);
        --tablet-action-h: 36px;
    }
}

@media (orientation: landscape) and (max-width: 1366px) and (max-height: 920px) {
    :root:not([data-app-fullscreen="on"]),
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: clamp(6px, .85vw, 10px);
        --tablet-action-h: 41px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-landscape-prompt-lines: 3;
        --tablet-landscape-prompt-text-min-h: calc(var(--tablet-landscape-prompt-lines) * 1.25em + 10px);
        --tablet-landscape-prompt-text-h: var(--tablet-landscape-prompt-text-min-h);
        --quick-grid-h: 65px;
        --tablet-landscape-prompt-step-h: calc(24px + var(--compact-panel-pad) * 2 + var(--step-gap) * 3 + var(--quick-grid-h) + var(--mode-param-h) + var(--tablet-landscape-prompt-text-h));
    }

    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        display: grid;
        grid-template-columns: minmax(0, 1.52fr) minmax(300px, .88fr);
        grid-template-rows: minmax(0, 1fr);
        gap: var(--tablet-block-gap);
        align-content: stretch;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --step-gap: clamp(4px, .72vh, 7px);
        --settings-grid-h: clamp(38px, 5.1vh, 48px);
        --generate-row-h: var(--tablet-action-h);
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(210px, 1fr) var(--tablet-landscape-prompt-step-h) max-content;
        gap: var(--tablet-block-gap);
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        display: grid;
        grid-template-rows: auto minmax(0, 1fr) auto;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel.has-variants,
    :root[data-app-fullscreen="on"] .result-panel.has-variants {
        --variant-strip-h: clamp(70px, 10vh, 100px);
        grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) auto;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) var(--tablet-landscape-prompt-text-h);
    }

    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: var(--tablet-landscape-prompt-text-min-h);
        max-height: var(--tablet-landscape-prompt-text-h);
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .result-actions .secondary-btn {
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
    }

    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn span,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn span,
    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn span,
    :root[data-app-fullscreen="on"] .result-actions .secondary-btn span {
        display: inline;
    }
}

@media (orientation: portrait) and (min-height: 1800px) {
    :root:not([data-app-fullscreen="on"]),
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: clamp(14px, .62svh, 24px);
        --tablet-upload-flex-h: clamp(460px, 26svh, 820px);
        --tablet-upload-floor-h: clamp(420px, 22svh, 720px);
        --tablet-upload-min-h: var(--tablet-upload-flex-h);
        --tablet-result-h: calc(var(--tablet-upload-flex-h) + 40px);
        --tablet-prompt-flex-h: clamp(360px, 18svh, 560px);
        --tablet-action-h: 54px;
        --compact-panel-pad: 18px;
    }

    :root:not([data-app-fullscreen="on"]) .main,
    :root[data-app-fullscreen="on"] .main {
        display: flex;
        flex-direction: column;
        gap: var(--tablet-block-gap);
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .work-panel,
    :root[data-app-fullscreen="on"] .work-panel {
        --mode-param-h: clamp(48px, 3.4svh, 72px);
        --settings-grid-h: clamp(52px, 3.2svh, 72px);
        --generate-row-h: var(--tablet-action-h);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        flex: 0 0 var(--tablet-prompt-flex-h);
        height: var(--tablet-prompt-flex-h);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:first-child,
    :root[data-app-fullscreen="on"] .work-panel > .step:first-child {
        flex: 1 1 var(--tablet-upload-flex-h);
        min-height: var(--tablet-upload-floor-h);
    }

    :root:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(3),
    :root[data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        flex: 0 0 auto;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto auto minmax(var(--tablet-prompt-min-h), 1fr);
        align-content: stretch;
    }

    :root:not([data-app-fullscreen="on"]) .quick-grid,
    :root:not([data-app-fullscreen="on"]) .mode-param-slot,
    :root[data-app-fullscreen="on"] .quick-grid,
    :root[data-app-fullscreen="on"] .mode-param-slot {
        align-self: start;
    }

    :root:not([data-app-fullscreen="on"]) .result-panel,
    :root[data-app-fullscreen="on"] .result-panel {
        flex: 1 1 var(--tablet-result-h);
        min-height: calc(var(--tablet-upload-floor-h) + 40px);
        height: auto;
    }
}

/* Font-size modes are also layout modes. Small text releases room to upload,
   prompt, and result; large text lets step 3 and the text controls breathe. */
@media (orientation: portrait) and (min-width: 640px) {
    :root[data-font-scale="large"] {
        --tablet-action-h: 48px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-prompt-min-h: calc(3 * 1.45em + 12px);
        --mode-param-h: clamp(60px, 6svh, 86px);
        --settings-grid-h: clamp(62px, 5.8svh, 84px);
        --generate-row-h: var(--tablet-action-h);
        --step-gap: clamp(7px, .9svh, 12px);
    }

    :root[data-font-scale="large"] .step-head,
    :root[data-font-scale="large"] .result-head {
        min-height: 34px;
    }

    :root[data-font-scale="large"] .step-badge {
        width: 30px;
        height: 30px;
        font-size: 15px;
    }

    :root[data-font-scale="large"] .step-title {
        font-size: 18px;
        line-height: 1.18;
    }

    :root[data-font-scale="large"] .hint,
    :root[data-font-scale="large"] label,
    :root[data-font-scale="large"] .status-pill,
    :root[data-font-scale="large"] .message {
        font-size: 15px;
    }

    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .mode-switch-btn,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn,
    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea {
        font-size: 18px;
    }

    :root[data-font-scale="large"] .quick-btn {
        min-height: 46px;
        padding-inline: 12px;
    }

    :root[data-font-scale="large"] .mode-switch-btn {
        min-height: 38px;
        padding-inline: 14px;
    }

    :root[data-font-scale="large"] .mode-control-group .field,
    :root[data-font-scale="large"] .settings > .field {
        gap: 5px;
        padding: 7px 10px;
        grid-template-rows: 18px minmax(0, 42px);
    }

    :root[data-font-scale="large"] .mode-control-group select,
    :root[data-font-scale="large"] select {
        height: 42px;
        min-height: 42px;
        padding-inline: 12px;
    }

    :root[data-font-scale="large"] .work-panel > .step:nth-of-type(3) {
        --status-chip-h: 28px;
    }

    :root[data-font-scale="large"] .message {
        line-height: 1.25;
    }

    :root[data-font-scale="large"] .generate-row,
    :root[data-font-scale="large"] .upload-actions,
    :root[data-font-scale="large"] .result-actions,
    :root[data-font-scale="large"] .generate-row .primary-btn,
    :root[data-font-scale="large"] .generate-row > .concurrency-field,
    :root[data-font-scale="large"] .generate-row > .concurrency-field select,
    :root[data-font-scale="large"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"] .result-actions .secondary-btn {
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
    }

    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn {
        padding-block: 0;
    }

    :root[data-font-scale="large"] .upload-actions,
    :root[data-font-scale="large"] .result-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    :root[data-font-scale="large"] #prompt {
        min-height: var(--tablet-prompt-min-h);
        line-height: 1.45;
        padding: 12px 14px;
    }
}

@media (orientation: portrait) and (min-width: 640px) and (max-width: 1180px) and (max-height: 1400px) {
    :root[data-font-scale="large"] {
        --tablet-action-h: 44px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-upload-h: clamp(250px, 25svh, 306px);
        --tablet-result-h: calc(var(--tablet-upload-h) + 40px);
        --tablet-block-gap: clamp(6px, .72svh, 10px);
        --compact-panel-pad: 10px;
        --tablet-prompt-min-h: calc(3 * 1.34em + 18px);
        --mode-param-h: clamp(46px, 4.4svh, 56px);
        --settings-grid-h: clamp(46px, 4.2svh, 54px);
        --generate-row-h: var(--tablet-action-h);
        --step-gap: clamp(5px, .62svh, 8px);
    }

    :root[data-font-scale="large"] .main {
        grid-template-rows:
            minmax(var(--tablet-upload-h), var(--tablet-upload-h))
            max-content
            max-content
            minmax(var(--tablet-result-h), var(--tablet-result-h));
    }

    :root[data-font-scale="large"] .step-head,
    :root[data-font-scale="large"] .result-head {
        min-height: 28px;
    }

    :root[data-font-scale="large"] .step-badge {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }

    :root[data-font-scale="large"] .step-title {
        font-size: 16px;
        line-height: 1.16;
    }

    :root[data-font-scale="large"] .hint,
    :root[data-font-scale="large"] label,
    :root[data-font-scale="large"] .status-pill,
    :root[data-font-scale="large"] .message {
        font-size: 13px;
    }

    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .mode-switch-btn,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn,
    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea {
        font-size: 15px;
    }

    :root[data-font-scale="large"] .quick-btn {
        min-height: 36px;
        padding-inline: 9px;
    }

    :root[data-font-scale="large"] .mode-switch-btn {
        min-height: 32px;
        padding-inline: 10px;
    }

    :root[data-font-scale="large"] .mode-control-group .field,
    :root[data-font-scale="large"] .settings > .field {
        gap: 4px;
        padding: 5px 8px;
        grid-template-rows: 14px minmax(0, 34px);
    }

    :root[data-font-scale="large"] .mode-control-group select,
    :root[data-font-scale="large"] select {
        height: 34px;
        min-height: 34px;
        padding-inline: 9px;
    }

    :root[data-font-scale="large"] .work-panel > .step:nth-of-type(3) {
        --status-chip-h: 24px;
    }

    :root[data-font-scale="large"] #prompt {
        line-height: 1.34;
        padding: 9px 11px;
    }
}

@media (orientation: portrait) and (min-height: 1800px) {
    :root:not([data-font-scale="large"]) {
        --tablet-action-h: 48px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-upload-flex-h: clamp(520px, 28svh, 900px);
        --tablet-upload-floor-h: clamp(460px, 23svh, 760px);
        --tablet-result-h: calc(var(--tablet-upload-flex-h) + 40px);
        --tablet-prompt-flex-h: clamp(300px, 14svh, 430px);
        --mode-param-h: clamp(44px, 2.9svh, 62px);
        --settings-grid-h: clamp(46px, 2.7svh, 64px);
        --generate-row-h: var(--tablet-action-h);
    }

    :root:not([data-font-scale="large"]) .upload-actions,
    :root:not([data-font-scale="large"]) .result-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        grid-auto-flow: column;
        grid-auto-columns: minmax(0, 1fr);
        align-items: stretch;
        gap: clamp(5px, .75vw, 10px);
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
        max-height: var(--tablet-action-h);
        overflow: hidden;
    }

    :root:not([data-font-scale="large"]) .upload-actions .secondary-btn,
    :root:not([data-font-scale="large"]) .result-actions .secondary-btn {
        width: 100%;
        min-width: 0;
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
    }

    :root[data-font-scale="large"] {
        --tablet-action-h: 54px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-upload-flex-h: clamp(400px, 21svh, 720px);
        --tablet-upload-floor-h: clamp(360px, 18svh, 640px);
        --tablet-result-h: calc(var(--tablet-upload-flex-h) + 40px);
        --tablet-prompt-flex-h: clamp(480px, 22svh, 700px);
        --tablet-prompt-min-h: calc(3 * 1.45em + 30px);
        --tablet-block-gap: clamp(16px, .72svh, 28px);
        --compact-panel-pad: 22px;
        --mode-param-h: clamp(72px, 4.6svh, 104px);
        --settings-grid-h: clamp(76px, 4.2svh, 104px);
        --generate-row-h: var(--tablet-action-h);
    }
}

@media (orientation: landscape) and (min-width: 640px) and (max-width: 1400px) and (max-height: 1180px) {
    :root[data-font-scale="large"] {
        --tablet-action-h: 44px;
        --bottom-action-h: var(--tablet-action-h);
        --mode-param-h: 50px;
        --settings-grid-h: 52px;
        --generate-row-h: var(--tablet-action-h);
        --step-gap: 6px;
        --tablet-landscape-prompt-lines: 3;
        --tablet-landscape-prompt-text-min-h: calc(var(--tablet-landscape-prompt-lines) * 1.34em + 18px);
        --tablet-landscape-prompt-text-h: var(--tablet-landscape-prompt-text-min-h);
        --quick-grid-h: 65px;
        --tablet-landscape-prompt-step-h: calc(24px + var(--compact-panel-pad) * 2 + var(--step-gap) * 3 + var(--quick-grid-h) + var(--mode-param-h) + var(--tablet-landscape-prompt-text-h));
    }

    :root[data-font-scale="large"] .work-panel {
        grid-template-rows: minmax(170px, 1fr) var(--tablet-landscape-prompt-step-h) max-content !important;
    }

    :root[data-font-scale="large"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) var(--tablet-landscape-prompt-text-h) !important;
    }

    :root[data-font-scale="large"] .mode-extra,
    :root[data-font-scale="large"] #prompt {
        min-height: var(--tablet-landscape-prompt-text-min-h);
        max-height: var(--tablet-landscape-prompt-text-h);
    }

    :root[data-font-scale="large"] .step-head,
    :root[data-font-scale="large"] .result-head {
        min-height: 28px;
    }

    :root[data-font-scale="large"] .step-badge {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }

    :root[data-font-scale="large"] .step-title {
        font-size: 16px;
        line-height: 1.16;
    }

    :root[data-font-scale="large"] .hint,
    :root[data-font-scale="large"] label,
    :root[data-font-scale="large"] .status-pill,
    :root[data-font-scale="large"] .message {
        font-size: 13px;
    }

    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .mode-switch-btn,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn,
    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea {
        font-size: 15px;
    }

    :root[data-font-scale="large"] .quick-btn {
        min-height: 36px;
        padding-inline: 9px;
    }

    :root[data-font-scale="large"] .mode-switch-btn {
        min-height: 32px;
        padding-inline: 10px;
    }

    :root[data-font-scale="large"] .mode-control-group .field,
    :root[data-font-scale="large"] .settings > .field {
        gap: 4px;
        padding: 5px 8px;
        grid-template-rows: 14px minmax(0, 34px);
    }

    :root[data-font-scale="large"] .mode-control-group select,
    :root[data-font-scale="large"] select {
        height: 34px;
        min-height: 34px;
        padding-inline: 9px;
    }

    :root[data-font-scale="large"] .work-panel > .step:nth-of-type(3) {
        --status-chip-h: 24px;
    }

    :root[data-font-scale="large"] #prompt {
        line-height: 1.34;
        padding: 9px 11px;
    }

    :root[data-font-scale="large"] .generate-row,
    :root[data-font-scale="large"] .upload-actions,
    :root[data-font-scale="large"] .result-actions,
    :root[data-font-scale="large"] .generate-row .primary-btn,
    :root[data-font-scale="large"] .generate-row > .concurrency-field,
    :root[data-font-scale="large"] .generate-row > .concurrency-field select,
    :root[data-font-scale="large"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"] .result-actions .secondary-btn {
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
    }
}

/* Final tablet contract: fullscreen should visibly return chrome space to the
   three variable areas, and upload/result action rows stay compact one-line grids. */
@media (min-width: 640px) and (max-width: 1400px) and (max-height: 1400px) {
    :root:not([data-app-fullscreen="on"]) {
        --tablet-block-gap: clamp(4px, .52vw, 6px);
    }

    :root[data-app-fullscreen="on"] {
        --compact-page-pad-x: 3px;
        --compact-page-pad-y: 3px;
        --compact-gap: 3px;
        --tablet-block-gap: 3px;
        --compact-panel-pad: 8px;
    }

    :root[data-app-fullscreen="on"] .app {
        height: var(--app-viewport-h);
        gap: var(--compact-gap) !important;
        padding:
            max(var(--compact-page-pad-y), env(safe-area-inset-top))
            max(var(--compact-page-pad-x), env(safe-area-inset-right))
            max(var(--compact-page-pad-y), env(safe-area-inset-bottom))
            max(var(--compact-page-pad-x), env(safe-area-inset-left)) !important;
        overflow: hidden;
    }

    :root:not([data-app-fullscreen="on"]) .main {
        gap: var(--tablet-block-gap) !important;
    }

    :root[data-app-fullscreen="on"] .topbar {
        height: 34px !important;
        min-height: 34px !important;
        max-height: 34px !important;
        padding-block: 0 !important;
        overflow: hidden !important;
    }

    :root[data-app-fullscreen="on"] .brand {
        gap: 6px;
        height: 32px;
        max-height: 32px;
        overflow: hidden;
    }

    :root[data-app-fullscreen="on"] .brand-mark,
    :root[data-app-fullscreen="on"] .brand-logo {
        width: 32px !important;
        height: 32px !important;
        margin-top: 0 !important;
    }

    :root[data-app-fullscreen="on"] .brand h1 {
        font-size: 15px;
        line-height: 1.05;
    }

    :root[data-app-fullscreen="on"] .brand p {
        display: none;
    }

    :root[data-app-fullscreen="on"] .top-actions {
        gap: 4px;
        height: 32px !important;
        max-height: 32px !important;
        align-items: center;
        overflow: hidden;
    }

    :root[data-app-fullscreen="on"] .text-btn,
    :root[data-app-fullscreen="on"] .icon-btn {
        height: 32px !important;
        min-height: 32px !important;
        max-height: 32px !important;
        padding-inline: 8px !important;
    }

    :root[data-app-fullscreen="on"] .icon-btn {
        width: 32px !important;
        padding-inline: 0 !important;
    }

    :root[data-app-fullscreen="on"] .main {
        gap: var(--tablet-block-gap) !important;
        height: 100%;
        overflow: hidden;
    }

    :root[data-app-fullscreen="on"] .work-panel,
    :root[data-app-fullscreen="on"] .result-panel,
    :root[data-app-fullscreen="on"] .work-panel > .step {
        gap: var(--step-gap) !important;
    }

    :root[data-app-fullscreen="on"] .upload-actions,
    :root[data-app-fullscreen="on"] .result-actions,
    :root:not([data-app-fullscreen="on"]) .upload-actions,
    :root:not([data-app-fullscreen="on"]) .result-actions {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
        grid-auto-flow: column;
        grid-auto-columns: minmax(0, 1fr);
        align-items: stretch;
        gap: clamp(3px, .52vw, 6px) !important;
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
        max-height: var(--tablet-action-h);
        overflow: hidden;
    }

    :root[data-app-fullscreen="on"] .upload-actions .secondary-btn,
    :root[data-app-fullscreen="on"] .result-actions .secondary-btn,
    :root:not([data-app-fullscreen="on"]) .upload-actions .secondary-btn,
    :root:not([data-app-fullscreen="on"]) .result-actions .secondary-btn {
        width: 100%;
        min-width: 0;
        height: var(--tablet-action-h);
        min-height: var(--tablet-action-h);
        padding-inline: clamp(5px, .8vw, 10px);
    }
}

@media (orientation: landscape) and (min-width: 640px) and (max-width: 1400px) and (max-height: 920px) {
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: 3px;
        --tablet-action-h: 38px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-landscape-prompt-lines: 3;
        --tablet-landscape-prompt-text-min-h: calc(var(--tablet-landscape-prompt-lines) * 1.2em + 10px);
        --tablet-landscape-prompt-text-h: var(--tablet-landscape-prompt-text-min-h);
        --quick-grid-h: 65px;
        --tablet-landscape-prompt-step-h: calc(24px + var(--compact-panel-pad) * 2 + var(--step-gap) * 3 + var(--quick-grid-h) + var(--mode-param-h) + var(--tablet-landscape-prompt-text-h));
    }

    :root[data-app-fullscreen="on"] .work-panel {
        grid-template-rows: minmax(190px, 1fr) var(--tablet-landscape-prompt-step-h) max-content !important;
        gap: var(--tablet-block-gap) !important;
    }

    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) var(--tablet-landscape-prompt-text-h) !important;
    }

    :root[data-app-fullscreen="on"] .quick-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-template-rows: repeat(2, minmax(0, 31px));
        gap: 3px;
        height: var(--quick-grid-h);
        min-height: 0;
        max-height: var(--quick-grid-h);
        overflow: hidden;
        padding: 0;
    }

    :root[data-app-fullscreen="on"] .quick-btn {
        height: 31px;
        min-height: 31px;
        padding: 0 6px;
        font-size: 13px;
        line-height: 1.05;
    }

    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] #prompt {
        min-height: var(--tablet-landscape-prompt-text-min-h);
        max-height: var(--tablet-landscape-prompt-text-h);
    }

    :root[data-app-fullscreen="on"] .result-panel {
        gap: var(--step-gap) !important;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] {
        --tablet-action-h: 40px;
        --bottom-action-h: var(--tablet-action-h);
        --generate-row-h: var(--tablet-action-h);
        --mode-param-h: 52px;
        --settings-grid-h: 52px;
        --status-chip-h: 20px;
        --variant-strip-h: clamp(54px, 8svh, 72px);
        --tablet-landscape-prompt-lines: 3;
        --tablet-landscape-prompt-text-min-h: calc(var(--tablet-landscape-prompt-lines) * 1.34em + 18px);
        --tablet-landscape-prompt-text-h: var(--tablet-landscape-prompt-text-min-h);
        --quick-grid-h: 65px;
        --tablet-landscape-prompt-step-h: calc(24px + var(--compact-panel-pad) * 2 + var(--step-gap) * 3 + var(--quick-grid-h) + var(--mode-param-h) + var(--tablet-landscape-prompt-text-h));
        --step-gap: 4px;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .work-panel {
        grid-template-rows: minmax(138px, 1fr) var(--tablet-landscape-prompt-step-h) max-content !important;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .work-panel > .step:nth-of-type(3) {
        grid-template-rows: auto max-content var(--status-chip-h) var(--generate-row-h) !important;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .step-head,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-head {
        min-height: 24px;
        max-height: 24px;
        gap: 5px;
        overflow: hidden;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .step-title {
        min-width: 0;
        gap: 5px;
        font-size: 15px;
        line-height: 1.08;
        white-space: nowrap;
        overflow: hidden;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .step-title span:last-child {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .step-badge {
        width: 22px;
        height: 22px;
        font-size: 11px;
        flex: 0 0 auto;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .quick-grid {
        grid-template-rows: repeat(2, minmax(0, 31px));
        gap: 3px;
        height: var(--quick-grid-h);
        max-height: var(--quick-grid-h);
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .quick-btn {
        height: 31px;
        min-height: 31px;
        padding-inline: 6px;
        font-size: 13px;
        line-height: 1.05;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .hint,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .status-pill {
        min-width: 0;
        max-width: 44%;
        font-size: 12px;
        line-height: 1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .status-pill {
        min-height: 20px;
        padding: 2px 7px;
        gap: 5px;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-param-slot {
        height: var(--mode-param-h);
        min-height: var(--mode-param-h);
        overflow: visible;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .settings {
        height: var(--settings-grid-h);
        min-height: var(--settings-grid-h);
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-control-group .field {
        height: var(--mode-param-h);
        min-height: 0;
        padding: 4px 7px;
        grid-template-rows: 14px minmax(0, 28px);
        overflow: hidden;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .settings > .field {
        height: var(--settings-grid-h);
        min-height: 0;
        padding: 3px 7px;
        grid-template-rows: 13px minmax(0, 31px);
        overflow: hidden;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-control-group .field label,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .settings > .field label {
        font-size: 11px;
        line-height: 14px;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-control-group select,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .settings select {
        height: 28px;
        min-height: 28px;
        line-height: 1.15;
        padding-block: 0;
        font-size: 13px;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-panel {
        grid-template-rows: auto minmax(0, 1fr) var(--tablet-action-h) !important;
        gap: var(--step-gap) !important;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-panel.has-variants {
        grid-template-rows: auto minmax(0, 1fr) var(--variant-strip-h) var(--tablet-action-h) !important;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-box {
        min-height: 0;
        height: auto;
        margin: 0 !important;
        overflow: hidden !important;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-placeholder {
        min-height: 100%;
        gap: 8px;
        padding: 10px;
        align-content: center;
        overflow: hidden;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-placeholder .result-brand {
        width: clamp(64px, 10svh, 86px);
        flex: 0 0 auto;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-placeholder strong,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-placeholder .hint {
        line-height: 1.18;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-placeholder .result-contact {
        display: block;
        white-space: nowrap;
        overflow: visible;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-variants {
        height: var(--variant-strip-h);
        min-height: 0;
        max-height: var(--variant-strip-h);
        margin: 0 !important;
        overflow: hidden;
    }

    :root[data-font-scale="large"][data-app-fullscreen="on"] .generate-row,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .upload-actions,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-actions,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .generate-row .primary-btn,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .generate-row > .concurrency-field,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .generate-row > .concurrency-field select,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .result-actions .secondary-btn {
        height: var(--tablet-action-h) !important;
        min-height: var(--tablet-action-h) !important;
    }
}

@media (orientation: portrait) and (min-width: 640px) and (max-width: 1180px) and (max-height: 1400px) {
    :root[data-app-fullscreen="on"] {
        --tablet-block-gap: 3px;
        --tablet-action-h: 38px;
        --bottom-action-h: var(--tablet-action-h);
        --tablet-upload-h: clamp(250px, 25svh, 310px);
        --tablet-result-h: calc(var(--tablet-upload-h) + 40px);
        --tablet-prompt-min-h: calc(3 * 1.35em + 14px);
    }
}

@media (min-width: 640px) and (max-width: 1400px) and (max-height: 1400px) {
    .source-card {
        grid-template-rows: minmax(0, 1fr);
    }

    .source-meta {
        display: none;
    }
}

@media (orientation: portrait) and (min-width: 640px) and (max-width: 1180px) and (max-height: 1400px) {
    :root[data-font-scale="large"] {
        --compact-panel-pad: 6px;
        --step-gap: 3px;
        --tablet-action-h: 36px;
        --bottom-action-h: var(--tablet-action-h);
        --generate-row-h: var(--tablet-action-h);
        --mode-param-h: 44px;
        --settings-grid-h: 44px;
        --status-chip-h: 18px;
        --tablet-prompt-min-h: calc(3 * 1.34em + 18px);
    }

    :root[data-font-scale="large"] .step-head,
    :root[data-font-scale="large"] .result-head {
        min-height: 24px;
        max-height: 24px;
        overflow: hidden;
    }

    :root[data-font-scale="large"] .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-template-rows: repeat(2, minmax(0, 28px));
        gap: 3px;
        height: 59px;
        overflow: hidden;
    }

    :root[data-font-scale="large"] .quick-btn {
        height: 28px;
        min-height: 28px;
        padding-inline: 6px;
        font-size: 14px;
        line-height: 1.05;
    }

    :root[data-font-scale="large"] .mode-switch-btn {
        min-height: 28px;
        padding-inline: 8px;
    }

    :root[data-font-scale="large"] .mode-param-slot {
        height: var(--mode-param-h);
        min-height: var(--mode-param-h);
        overflow: hidden;
    }

    :root[data-font-scale="large"] .mode-control-group .field,
    :root[data-font-scale="large"] .settings > .field {
        gap: 3px;
        padding: 3px 6px;
        grid-template-rows: 12px minmax(0, 26px);
        overflow: hidden;
    }

    :root[data-font-scale="large"] .mode-control-group select,
    :root[data-font-scale="large"] .settings select {
        height: 26px;
        min-height: 26px;
        padding-block: 0;
        padding-inline: 7px;
        line-height: 1.1;
    }

    :root:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) var(--tablet-prompt-min-h) !important;
    }

    :root:not([data-app-fullscreen="on"]) .mode-extra,
    :root:not([data-app-fullscreen="on"]) #prompt,
    :root[data-app-fullscreen="on"] .mode-extra,
    :root[data-app-fullscreen="on"] #prompt {
        height: var(--tablet-prompt-min-h);
        min-height: var(--tablet-prompt-min-h);
        max-height: var(--tablet-prompt-min-h);
    }
}

/* 4K large-mode contract: orientation changes may resize columns, not text or
   button heights. */
@media (min-width: 1200px) and (min-height: 2000px) {
    :root[data-font-scale="large"] {
        --button-h-4k: 54px;
        --compact-action-h: var(--button-h-4k);
        --bottom-action-h: var(--button-h-4k);
        --tablet-action-h: var(--button-h-4k);
        --generate-row-h: var(--button-h-4k);
        --quick-grid-h: calc(var(--button-h-4k) * 2 + var(--step-gap));
        --mode-param-h: 82px;
        --settings-grid-h: 74px;
        --step-gap: 10px;
        --status-chip-h: 28px;
    }

    :root[data-font-scale="large"] .brand h1 {
        font-size: 34px;
        line-height: 1.08;
    }

    :root[data-font-scale="large"] .brand p,
    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn {
        font-size: 17px;
    }

    :root[data-font-scale="large"] .step-title {
        font-size: 18px;
        line-height: 1.15;
    }

    :root[data-font-scale="large"] .hint,
    :root[data-font-scale="large"] label,
    :root[data-font-scale="large"] .status-pill,
    :root[data-font-scale="large"] .message {
        font-size: 15px;
    }

    :root[data-font-scale="large"] .mode-switch-btn {
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
        font-size: 15px;
        padding-inline: 18px;
    }

    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea {
        font-size: 16px;
    }

    :root[data-font-scale="large"] textarea {
        line-height: 1.42;
        padding: 11px 13px;
    }

    :root[data-font-scale="large"] .mode-control-group select,
    :root[data-font-scale="large"] .settings select,
    :root[data-font-scale="large"] select {
        height: 44px !important;
        min-height: 44px !important;
        font-size: 16px !important;
        line-height: normal !important;
        padding-inline: 12px;
    }

    :root[data-font-scale="large"] .mode-control-group .field,
    :root[data-font-scale="large"] .settings > .field {
        gap: 5px;
        padding: 7px 11px;
        grid-template-rows: 18px minmax(0, 44px);
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .mode-control-group .field,
    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .settings > .field,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-control-group .field,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .settings > .field {
        grid-template-rows: 18px minmax(0, 44px) !important;
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .mode-control-group select,
    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .settings select,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-control-group select,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .settings select {
        height: 44px !important;
        min-height: 44px !important;
        font-size: 16px !important;
        line-height: normal !important;
    }

    :root[data-font-scale="large"] .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-template-rows: repeat(2, minmax(0, var(--button-h-4k)));
        gap: 10px;
        height: var(--quick-grid-h);
        min-height: var(--quick-grid-h);
        max-height: var(--quick-grid-h);
        overflow: hidden;
    }

    :root[data-font-scale="large"] .quick-btn {
        width: 100%;
        min-width: 0;
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
        padding: 5px 12px;
        line-height: 1.14;
    }

    :root[data-font-scale="large"] .icon-btn,
    :root[data-font-scale="large"] .text-btn {
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
    }

    :root[data-font-scale="large"] .icon-btn {
        width: var(--button-h-4k);
        min-width: var(--button-h-4k);
    }

    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn {
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
        padding-block: 0;
    }

    :root[data-font-scale="large"] .upload-actions,
    :root[data-font-scale="large"] .result-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        grid-auto-flow: column;
        grid-auto-columns: minmax(0, 1fr);
        align-items: stretch;
        width: 100%;
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
    }

    :root[data-font-scale="large"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"] .result-actions .secondary-btn {
        width: 100%;
        min-width: 0;
    }

    :root[data-font-scale="large"] .generate-row,
    :root[data-font-scale="large"] .generate-row .primary-btn,
    :root[data-font-scale="large"] .generate-row > .concurrency-field,
    :root[data-font-scale="large"] .generate-row > .concurrency-field select,
    :root[data-font-scale="large"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"] .result-actions .secondary-btn {
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
    }
}

@media (orientation: portrait) and (min-width: 1200px) and (min-height: 2000px) {
    :root[data-font-scale="large"] {
        --mode-param-h: 72px;
        --settings-grid-h: 64px;
        --tablet-prompt-step-head-h: 60px;
        --tablet-prompt-text-min-h: calc(3 * 1.45em + 26px);
        --tablet-prompt-text-target-h: calc(5 * 1.45em + 26px);
        --tablet-prompt-step-chrome-h: calc(var(--tablet-prompt-step-head-h) + var(--compact-panel-pad) * 2 + var(--step-gap) * 3 + var(--quick-grid-h) + var(--mode-param-h));
        --tablet-prompt-step-min-h: calc(var(--tablet-prompt-step-chrome-h) + var(--tablet-prompt-text-min-h));
        --tablet-prompt-step-target-h: calc(var(--tablet-prompt-step-chrome-h) + var(--tablet-prompt-text-target-h));
        --tablet-prompt-flex-h: var(--tablet-prompt-step-target-h);
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-font-scale="large"][data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        flex: 0 1 var(--tablet-prompt-step-target-h);
        height: var(--tablet-prompt-step-target-h);
        min-height: var(--tablet-prompt-step-min-h);
        max-height: var(--tablet-prompt-step-target-h);
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: auto var(--mode-param-h) minmax(var(--tablet-prompt-text-min-h), var(--tablet-prompt-text-target-h)) !important;
        align-content: stretch;
        min-height: 0;
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .mode-extra,
    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) #prompt,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-extra,
    :root[data-font-scale="large"][data-app-fullscreen="on"] #prompt {
        height: min(100%, var(--tablet-prompt-text-target-h));
        min-height: var(--tablet-prompt-text-min-h);
        max-height: var(--tablet-prompt-text-target-h);
    }
}

@media (orientation: portrait) and (min-width: 800px) and (min-height: 1400px) and (min-resolution: 2dppx) {
    :root[data-font-scale="large"] {
        --button-h-4k: 54px;
        --compact-action-h: var(--button-h-4k);
        --bottom-action-h: var(--button-h-4k);
        --tablet-action-h: var(--button-h-4k);
        --generate-row-h: var(--button-h-4k);
        --quick-grid-h: calc(var(--button-h-4k) * 2 + var(--step-gap));
        --mode-param-h: 72px;
        --settings-grid-h: 64px;
        --step-gap: 10px;
        --status-chip-h: 28px;
        --tablet-prompt-step-head-h: 60px;
        --tablet-prompt-text-min-h: calc(3 * 1.45em + 26px);
        --tablet-prompt-text-target-h: calc(5 * 1.45em + 26px);
        --tablet-prompt-step-chrome-h: calc(var(--tablet-prompt-step-head-h) + var(--compact-panel-pad) * 2 + var(--step-gap) * 3 + var(--quick-grid-h) + var(--mode-param-h));
        --tablet-prompt-step-min-h: calc(var(--tablet-prompt-step-chrome-h) + var(--tablet-prompt-text-min-h));
        --tablet-prompt-step-target-h: calc(var(--tablet-prompt-step-chrome-h) + var(--tablet-prompt-text-target-h));
        --tablet-prompt-flex-h: var(--tablet-prompt-step-target-h);
    }

    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] .icon-btn {
        font-size: 17px;
    }

    :root[data-font-scale="large"] .mode-switch-btn {
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
        font-size: 15px;
        padding-inline: 18px;
    }

    :root[data-font-scale="large"] select,
    :root[data-font-scale="large"] textarea {
        font-size: 16px;
    }

    :root[data-font-scale="large"] textarea {
        line-height: 1.42;
        padding: 11px 13px;
    }

    :root[data-font-scale="large"] .quick-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-template-rows: repeat(2, minmax(0, var(--button-h-4k)));
        gap: 10px;
        height: var(--quick-grid-h);
        min-height: var(--quick-grid-h);
        max-height: var(--quick-grid-h);
        overflow: hidden;
    }

    :root[data-font-scale="large"] .quick-btn,
    :root[data-font-scale="large"] .icon-btn,
    :root[data-font-scale="large"] .text-btn,
    :root[data-font-scale="large"] #apiSettingsLink,
    :root[data-font-scale="large"] .primary-btn,
    :root[data-font-scale="large"] .secondary-btn,
    :root[data-font-scale="large"] .upload-actions,
    :root[data-font-scale="large"] .result-actions,
    :root[data-font-scale="large"] .generate-row,
    :root[data-font-scale="large"] .generate-row .primary-btn,
    :root[data-font-scale="large"] .generate-row > .concurrency-field,
    :root[data-font-scale="large"] .generate-row > .concurrency-field select,
    :root[data-font-scale="large"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"] .result-actions .secondary-btn {
        height: var(--button-h-4k) !important;
        min-height: var(--button-h-4k) !important;
        max-height: var(--button-h-4k) !important;
    }

    :root[data-font-scale="large"] .icon-btn,
    :root[data-font-scale="large"] #apiSettingsLink {
        width: var(--button-h-4k) !important;
        min-width: var(--button-h-4k) !important;
    }

    :root[data-font-scale="large"] .upload-actions,
    :root[data-font-scale="large"] .result-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        grid-auto-flow: column;
        grid-auto-columns: minmax(0, 1fr);
        align-items: stretch;
        width: 100%;
    }

    :root[data-font-scale="large"] .upload-actions .secondary-btn,
    :root[data-font-scale="large"] .result-actions .secondary-btn,
    :root[data-font-scale="large"] .quick-btn {
        width: 100%;
        min-width: 0;
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .work-panel > .step:nth-of-type(2),
    :root[data-font-scale="large"][data-app-fullscreen="on"] .work-panel > .step:nth-of-type(2) {
        flex: 0 1 var(--tablet-prompt-step-target-h);
        height: var(--tablet-prompt-step-target-h);
        min-height: var(--tablet-prompt-step-min-h);
        max-height: var(--tablet-prompt-step-target-h);
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .prompt-box,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .prompt-box {
        grid-template-rows: var(--quick-grid-h) var(--mode-param-h) minmax(var(--tablet-prompt-text-min-h), var(--tablet-prompt-text-target-h)) !important;
        align-content: stretch;
        min-height: 0;
    }

    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) .mode-extra,
    :root[data-font-scale="large"]:not([data-app-fullscreen="on"]) #prompt,
    :root[data-font-scale="large"][data-app-fullscreen="on"] .mode-extra,
    :root[data-font-scale="large"][data-app-fullscreen="on"] #prompt {
        height: min(100%, var(--tablet-prompt-text-target-h));
        min-height: var(--tablet-prompt-text-min-h);
        max-height: var(--tablet-prompt-text-target-h);
    }
}