/* Compact layouts share the same controls, task feed and download authorization. */
.mobile-only { display: none; }

@media (max-width: 900px) {
    html, body { width: 100%; height: 100%; }
    button, a, summary { touch-action: manipulation; }
    button:focus-visible, a:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
    #cobalt-app {
        top: var(--mobile-viewport-top, 0px);
        height: 100dvh;
        height: var(--mobile-viewport-height, 100dvh);
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(0, 1fr) auto;
    }
    #sidebar {
        grid-row: 2;
        width: 100%; height: auto;
        flex-direction: row;
        border-right: 0;
        border-top: 1px solid var(--sidebar-stroke);
        padding: 6px max(12px, env(safe-area-inset-right)) max(6px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    }
    #sidebar .sidebar-top { display: none; }
    .sidebar-bottom.sidebar-tab-group { flex-direction: row; justify-content: space-around; gap: 4px; }
    .sidebar-tab { flex: 1; min-width: 44px; max-width: 100px; height: 50px; padding: 5px; }
    .sidebar-tab.mobile-only { display: flex; }
    .mobile-keyboard-open #sidebar { display: none; }
    #content {
        order: -1;
        min-height: 0; height: auto;
        margin: 0; padding: env(safe-area-inset-top) env(safe-area-inset-right) 20px env(safe-area-inset-left);
        scroll-padding-block: 16px;
        overscroll-behavior-y: contain;
    }
    #supported-services {
        position: static;
        width: calc(100% - 32px);
        max-width: 648px;
        margin: 12px 16px 0;
        flex-shrink: 0;
        gap: 6px;
    }
    #supported-services .services-pill { width: 100%; min-width: 0; max-width: 100%; padding: 2px 10px; }
    .platform-strip { flex: 1; min-height: 36px; scroll-padding-inline: 8px; }
    .service-item { font-size: 11px; }
    #supported-services .service-check-btn { min-width: 44px; min-height: 44px; font-size: 11px; padding-inline: 8px; }
    #cobalt-save-container { margin: 0; padding: 20px 16px; gap: 18px; flex-shrink: 0; }
    .hero-mark { flex-direction: row; gap: 10px; margin: 0 0 4px; }
    .hero-logo-box, .hero-stage { width: 48px; height: 48px; }
    .hero-title { font-size: 23px; }
    #omnibox { width: 100%; }
    #input-container { min-height: 56px; height: 56px; }
    #input-icon { display: none; }
    #link-area { min-width: 0; width: 0; font-size: 16px; padding-left: 14px; }
    #link-area::placeholder { font-size: 14px; }
    #clear-button, #paste-button { flex: 0 0 44px; width: 44px; height: 44px; margin: 0 4px 0 0; }
    #paste-button {
        display: flex; align-items: center; justify-content: center;
        background: transparent; border: 0; border-radius: 8px;
        color: var(--secondary); font-size: 12px;
    }
    #input-container.has-content #paste-button { display: none; }
    #download-button {
        flex: 0 0 56px; width: 56px; min-width: 56px;
        background: var(--secondary); color: var(--primary);
    }
    #download-button:hover:not(:disabled) { background: var(--secondary); }
    #download-button:disabled { background: var(--button-hover); color: var(--gray); }
    #action-container { flex-direction: row; gap: 0; }
    #action-container .action-right-group { display: none; }
    #action-container .switcher { display: grid; width: 100%; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 3px; }
    .switcher-btn { min-width: 0; height: 46px; padding: 6px 4px; justify-content: center; gap: 5px; font-size: 12px; }
    .switcher-btn svg { flex-shrink: 0; }
    #queue-section { margin-top: 4px; gap: 10px; }
    .queue-header, .queue-header.has-retention-hint {
        display: grid; grid-template-columns: minmax(0, 1fr) auto;
        gap: 8px; padding: 0; align-items: center;
    }
    .queue-tabs {
        display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
        grid-column: 1 / -1; width: 100%; gap: 0; padding: 3px; border-radius: 14px;
    }
    .queue-tab-btn { min-width: 0; min-height: 44px; justify-content: center; padding: 6px 2px; font-size: 12px; gap: 4px; border-radius: 10px; }
    .tab-badge { font-size: 10px; }
    .queue-retention-hint { order: 0; font-size: 11px; line-height: 1.6; min-width: 0; }
    .queue-clear-btn { grid-column: 2; min-width: 56px; min-height: 44px; justify-content: center; padding: 8px; border-radius: 9px; font-size: 12px; }
    #queue-list { gap: 12px !important; }
    .queue-card { padding: 14px; gap: 10px; border-radius: 14px; }
    .queue-card-top { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: start; }
    .queue-title-wrap { flex-wrap: wrap; gap: 6px; }
    .queue-title {
        flex: 0 0 100%; width: 100%; font-size: 14px; line-height: 1.55;
        white-space: normal; overflow-wrap: anywhere;
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    }
    .platform-badge, .queue-status-badge { font-size: 10px; line-height: 1.5; }
    .queue-status-badge { max-width: 125px; white-space: normal; text-align: right; }
    .queue-progress-track { height: 3px; }
    .queue-card-bottom { display: flex; flex-direction: column; align-items: stretch; gap: 12px; }
    .queue-message { flex: auto; width: 100%; max-width: 100%; white-space: normal; overflow-wrap: anywhere; font-size: 12px; line-height: 1.65; }
    .queue-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 0; max-width: 100%; }
    .queue-actions:empty { display: none; }
    .queue-card .file-action-btn {
        min-height: 44px; min-width: 0; justify-content: center; padding: 10px 6px;
        border-radius: 9px; font-size: 12px; line-height: 1.4; white-space: normal; text-align: center;
    }
    .queue-card .file-action-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
    .queue-card .file-action-primary { grid-column: 1 / -1; min-height: 48px; background: var(--secondary); color: var(--primary); font-size: 14px; }
    .queue-actions .file-action-btn:only-child { grid-column: 1 / -1; }
    .queue-pagination { justify-content: space-between; gap: 12px; }
    .queue-pagination .file-action-btn { min-width: 80px; min-height: 44px; justify-content: center; padding: 8px 12px; border-radius: 9px; }
    .empty-stub { padding: 32px 18px; font-size: 13px; line-height: 1.6; }
    #settings-dialog, #login-tip-dialog, #guide-dialog {
        top: var(--mobile-viewport-top, 0px);
        height: var(--mobile-viewport-height, 100dvh);
        padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
        align-items: end;
    }
    .dialog-container, #guide-dialog .manual-dialog { max-height: 100%; min-height: 0; padding: 16px; gap: 12px; border-radius: 18px; }
    .dialog-header { flex-shrink: 0; gap: 8px; padding-bottom: 10px; }
    .dialog-title { font-size: 15px; }
    .dialog-close { display: grid; place-items: center; width: 44px; height: 44px; flex: 0 0 44px; }
    .dialog-body { min-height: 0; overflow-y: auto; overscroll-behavior: contain; padding: 2px 2px 12px; gap: 18px; }
    .form-label { font-size: 12px; line-height: 1.6; }
    .form-select, .form-input { min-width: 0; min-height: 48px; font-size: 16px; }
    .dialog-body .action-btn, .extension-settings-row .extension-entry { min-height: 44px; height: auto; padding-block: 10px; }
    .dialog-body summary { min-height: 44px; padding-block: 12px; }
    .manual-tabs { gap: 8px; }
    .manual-tab { min-height: 44px; padding: 10px 2px; font-size: 13px; }
    .manual-panels { height: 50dvh; flex: 1 1 auto; }
    .manual-platform-groups { grid-template-columns: 1fr; gap: 18px; }
    .manual-faq summary { min-height: 44px; align-items: center; }
    .manual-faq details { padding: 6px 0; font-size: 13px; }
    .connect-dialog { width: min(440px, calc(100% - 24px)); max-height: calc(var(--mobile-viewport-height, 100dvh) - 32px); padding: 24px 18px; overscroll-behavior: contain; }
    .connect-dialog h2 { padding-right: 34px; }
    .connect-close { width: 44px; height: 44px; top: 8px; right: 8px; }
    .connect-actions button, .connect-actions a, .connect-dialog .step-action { min-height: 44px; }
    .download-toast { top: max(12px, env(safe-area-inset-top)); font-size: 13px; }
}

@media (max-width: 360px) {
    .switcher-btn { font-size: 11px; gap: 3px; }
    .switcher-btn svg { width: 12px; height: 12px; }
    .queue-tab-btn { flex-direction: column; gap: 0; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
    .d-base-wrap, .dolphin-swimmer-wrap, .ripple-ring, .dolphin-glint::after { animation: none; }
}