@media (max-width: 920px) {
    .profile-account-grid,
    .profile-frame-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .profile-frame-card {
        grid-template-columns: 150px minmax(0, 1fr);
        grid-template-areas:
            "thumb content"
            "actions content";
    }

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

@media (max-width: 620px) {
    .profile-main {
        padding: 12px;
        padding-bottom: calc(var(--tabbar-height) + 16px);
    }

    .profile-hero {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .profile-logout-form {
        grid-column: 1 / -1;
    }

    .profile-account-grid,
    .profile-frame-grid {
        grid-template-columns: 1fr;
    }

    .profile-frame-card {
        grid-template-columns: 1fr;
        grid-template-areas:
            "thumb"
            "actions"
            "content";
    }

    .profile-detail-modal {
        padding: 12px;
        align-items: flex-end;
    }

    .profile-detail-dialog {
        max-height: calc(100vh - 24px);
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .profile-detail-media {
        min-height: 220px;
    }

    .profile-detail-body {
        padding: 0;
    }

    .profile-detail-stats {
        grid-template-columns: 1fr;
    }

    .profile-inline-upload {
        grid-template-columns: 1fr;
    }

    .profile-section-head {
        display: grid;
    }
}

@media (max-width: 640px) {
    .design-frame-main {
        padding: 12px;
    }

    .design-frame-panel {
        padding: 14px;
    }

    .design-frame-library-grid,
    .design-icon-library-grid,
    .design-built-in-icons {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .design-tool-title {
        align-items: flex-start;
    }

    .design-tool-title-actions {
        gap: 5px;
    }

    .design-library-pager {
        min-height: 32px;
    }

    .design-control-grid {
        grid-template-columns: 1fr;
    }

    .design-editor-toolbar {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .design-canvas-shell,
    .design-result-wrap {
        min-height: 300px;
    }

    .convert-guide-trigger {
        width: 30px;
        height: 30px;
    }

    .convert-guide-modal {
        padding: 14px;
    }

    .convert-guide-dialog {
        width: min(100%, calc(100vw - 20px));
        max-height: calc(100vh - 24px);
        padding: 20px 16px;
        border-radius: 16px;
    }

    .convert-guide-grid {
        grid-template-columns: 1fr;
    }

    .convert-guide-dialog h2 {
        padding-right: 42px;
    }
}

@media (max-width: 460px) {
    body {
        font-size: 14px;
    }

    .header-title {
        max-width: 42vw;
    }

    .header-menu a,
    .header-menu button {
        padding: 7px 8px;
        font-size: 13px;
    }

    .header-usage-alert {
        max-width: 132px;
        line-height: 1.1;
    }

    .header-backhome {
        font-size: 0 !important;
        gap: 0;
    }

    .utility-bill-page .header-backhome {
        font-size: var(--font-size-heading) !important;
        gap: 6px;
    }

    .header-account-link {
        font-size: 0 !important;
        gap: 0;
    }

    .header-account-link .header-avatar,
    .header-account-link > svg {
        width: 22px;
        height: 22px;
    }

    .header-backhome svg {
        display: block;
        width: 20px;
        height: 20px;
        margin: 0 !important;
    }

    .container {
        padding: 10px;
    }

    .left,
    .right,
    .resize-panel,
    .cartoon-panel,
    .home-feature-panel,
    #inlineCropPanel {
        padding: 12px;
    }

    .home-quick-access-grid {
        gap: 8px;
    }

    .home-quick-access-item {
        min-height: 96px;
        padding: 12px 8px 10px;
    }

    .home-quick-access-icon {
        width: 44px;
        height: 44px;
        flex-basis: 44px;
    }

    .home-feature-media-stage {
        max-height: 420px;
    }

    .home-feature-video-modal {
        padding: 12px;
    }

    .home-feature-video-dialog {
        max-height: calc(100vh - 24px);
        padding: 12px;
    }

    .home-feature-video-dialog video {
        max-height: calc(100vh - 120px);
    }

    .frame-grid {
        --frame-card-size: clamp(70px, 21vw, 96px);
        grid-template-columns: repeat(4, calc((100% - 24px) / 4));
        grid-auto-columns: calc((100% - 24px) / 4);
        gap: 8px;
    }

    .frame-overview-stats,
    .overview-mini-grid,
    .overview-category-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .overview-use-side {
        grid-template-columns: 1fr;
    }

    #overviewSelectedFramePreview {
        width: min(100%, 220px);
        margin: 0 auto;
    }

    button,
    #downloadBtn,
    #resultPreview a {
        width: 100%;
    }

    .site-footer-link {
        width: auto;
    }

    .site-footer-main-nav .site-footer-link {
        width: 100%;
        min-height: 40px;
        padding-inline: 6px;
        gap: 5px;
        font-size: 12px;
    }

    .footer-about-menu {
        width: auto;
    }

    .footer-about-menu > .site-footer-link {
        width: 100%;
        min-height: 40px;
        padding-inline: 8px;
        font-size: 13px;
    }

    .footer-about-submenu {
        left: 0;
        right: 0;
        width: 100%;
    }

    .footer-info-modal {
        padding: 12px;
    }

    .footer-info-dialog {
        padding: 26px 20px 22px;
        border-radius: 16px;
    }

    .qr-two-col,
    .qr-output-actions {
        grid-template-columns: 1fr;
    }

    .qr-submit,
    .qr-output-actions a,
    .qr-output-actions button {
        width: 100%;
    }

    .qr-options-toggle {
        width: auto;
    }

    .crop-tool-row button,
    .crop-actions button,
    .frame-refresh-button,
    .frame-overview-button {
        width: auto;
        flex: 1 1 auto;
    }

    .frame-refresh-button,
    .frame-overview-button {
        width: 38px;
        flex: 0 0 38px;
    }

    #photoUploadForm button,
    #frameUploadForm button,
    #cartoonUploadForm button {
        width: 100%;
    }

    .upload-action-row .mobile-camera-button,
    .frame-share-upload-row .mobile-camera-button {
        width: auto;
        min-width: 108px;
        padding-inline: 10px;
    }

    .convert-action-row {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 6px;
    }

    .convert-action-row .convert-primary,
    .convert-action-row .convert-secondary {
        min-height: 38px;
        padding: 7px 6px;
        font-size: 12px;
    }

    .pdf-converter-page-nav {
        grid-template-columns: 1fr;
    }

    .pdf-converter-page-nav span {
        text-align: center;
    }

    .pdf-converter-meta-grid,
    .pdf-converter-action-row {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
    }
}

.header-mobile-icon,
.header-audio-submenu .header-mobile-hub {
    display: none;
}

.header-utility-menu.has-menu-controller:not(.is-open) .header-utility-submenu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
}

/* Shared mobile app shell: one control per menu, at least 44px per target. */
@media (max-width: 860px) {
    .header-bar,
    .header-bar.has-ai-voice,
    .header-bar.has-featured-voices {
        container-type: inline-size;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: stretch;
        min-height: 0;
        gap: 6px;
        padding: calc(8px + env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) 8px max(10px, env(safe-area-inset-left));
    }

    .header-bar .header-left,
    .header-bar.has-ai-voice .header-left {
        flex: 0 0 auto;
        width: 100%;
        min-width: 0;
        gap: 8px;
    }

    .header-bar .header-logo { width: 32px; height: 32px; }
    .header-bar .header-title { flex: 1; max-width: none; font-size: clamp(18px, 5vw, 24px); }

    .header-bar .header-menu,
    .header-bar.has-ai-voice .header-menu,
    .header-bar.has-featured-voices .header-menu {
        display: grid;
        grid-template-columns: repeat(var(--mobile-menu-items, 7), minmax(44px, 1fr));
        align-items: stretch;
        justify-content: stretch;
        flex: 0 0 auto;
        width: 100%;
        max-width: none;
        min-width: 0;
        margin: 0;
        gap: 4px;
    }

    .header-bar .header-menu[data-menu-items="0"] { display: none; }
    .header-bar .header-menu[data-menu-items="8"] { gap: 2px; }
    .utility-bill-page .header-bar .header-menu[data-menu-items] { grid-template-columns: repeat(auto-fit, minmax(44px, 1fr)); }

    .header-bar .header-menu > a:not(.header-usage-alert),
    .header-bar .header-menu > button,
    .header-bar .header-menu > .header-audio-menu > a,
    .header-bar .header-menu > .header-audio-menu > button,
    .header-bar .header-menu > .header-utility-menu > button {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 100%;
        min-width: 44px;
        min-height: 60px;
        margin: 0;
        padding: 4px 2px !important;
        gap: 3px;
        border-radius: 8px !important;
        border-left-width: 1px !important;
        font-size: 0 !important;
        line-height: 1;
        touch-action: manipulation;
    }

    .header-bar .header-menu [data-mobile-label]::after {
        content: attr(data-mobile-label);
        display: block;
        width: 100%;
        height: 24px;
        max-width: 100%;
        white-space: normal;
        text-align: center;
        font-family: var(--font-base);
        font-size: 10px;
        font-weight: 650;
        line-height: 12px;
    }

    .header-bar .header-menu > .header-trend::after { color: #9a4b08; }
    .header-bar .header-menu .header-menu-label,
    .header-bar .header-menu .header-account-name,
    .header-bar .header-menu .header-audio-chevron,
    .header-bar .header-menu .header-utility-chevron,
    .header-bar .header-menu > .is-split-menu > .header-audio-tools { display: none; }

    .header-bar .header-menu > .header-audio-menu,
    .header-bar .header-menu > .header-utility-menu { position: static; min-width: 0; }
    .header-bar .header-menu .header-mobile-icon { display: grid; place-items: center; }
    .header-bar .header-menu > a > svg,
    .header-bar .header-menu > button > svg,
    .header-bar .header-menu .header-mobile-icon,
    .header-bar .header-menu .header-mobile-icon > svg,
    .header-bar .header-menu > .header-utility-menu > button > svg:first-child {
        flex: 0 0 auto;
        width: 20px;
        height: 20px;
        margin: 0 !important;
    }
    .header-mobile-icon > svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
    .header-bar .header-account-link .header-avatar { width: 20px; height: 20px; font-size: 12px; }
    .header-bar .header-menu :focus-visible { outline: 3px solid #256fd9; outline-offset: 2px; }

    .header-bar .header-menu .header-audio-submenu,
    .header-bar .header-menu .header-utility-submenu {
        top: calc(100% + 6px);
        left: max(10px, env(safe-area-inset-left));
        right: max(10px, env(safe-area-inset-right));
        width: auto;
        max-width: none;
        max-height: min(440px, calc(100dvh - 180px - env(safe-area-inset-top) - env(safe-area-inset-bottom)));
        padding: 8px;
        overflow-y: auto;
        overscroll-behavior: contain;
        touch-action: pan-y;
    }

    .header-bar .header-menu .header-audio-submenu a,
    .header-bar .header-menu .header-utility-submenu a,
    .header-bar .header-menu .header-utility-submenu button {
        width: 100%;
        min-height: 44px;
        padding: 10px;
        font-size: 15px;
        line-height: 1.4;
        white-space: normal;
        overflow-wrap: anywhere;
    }
    .header-bar .header-audio-submenu .header-mobile-hub { display: flex; }

    .header-bar.has-usage-notice .header-left { min-height: 44px; padding-right: 50px; }
    .header-bar .header-menu > .header-usage-alert {
        position: absolute;
        top: calc(8px + env(safe-area-inset-top));
        right: max(10px, env(safe-area-inset-right));
        width: 44px;
        max-width: none;
        min-height: 44px;
        padding: 0 !important;
        font-size: 0 !important;
        gap: 0;
    }
    .header-bar .header-menu > .header-usage-alert > span { font-size: 16px; }

    .header-bar:has(#framepicsRequestHold) .header-left { min-height: 44px; padding-right: 50px; }
    .header-bar.has-usage-notice:has(#framepicsRequestHold) .header-left { padding-right: 100px; }
    .header-bar .header-menu > #framepicsRequestHold {
        position: absolute;
        top: calc(8px + env(safe-area-inset-top));
        right: max(10px, env(safe-area-inset-right));
        z-index: 1002;
        width: 44px;
        margin: 0;
    }
    .header-bar #framepicsRequestHold > summary {
        flex-direction: column;
        justify-content: center;
        min-width: 44px;
        min-height: 44px;
        padding: 4px 2px;
        gap: 3px;
        font-size: 0;
    }
    .header-bar #framepicsRequestHold > summary::after { content: 'Kết nối'; font-size: 9.5px; line-height: 12px; }
    .header-bar #framepicsRequestHold .request-hold-options {
        position: absolute;
        top: calc(100% + 8px);
        right: 0;
        bottom: auto;
        left: auto;
        width: min(320px, calc(100vw - max(10px, env(safe-area-inset-left)) - max(10px, env(safe-area-inset-right))));
        max-width: none;
        max-height: calc(100dvh - 140px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
        overflow-y: auto;
    }
    .header-bar.has-usage-notice #framepicsRequestHold { right: calc(max(10px, env(safe-area-inset-right)) + 50px); }
    .header-bar.has-usage-notice #framepicsRequestHold .request-hold-options { right: -50px; }
}

/* Viewport fallbacks also cover browsers without container queries. */
@media (max-width: 385px) {
    .header-bar .header-menu[data-menu-items="8"] { grid-template-columns: repeat(4, minmax(44px, 1fr)); }
}
@media (max-width: 351px) {
    .header-bar .header-menu[data-menu-items="7"] { grid-template-columns: repeat(4, minmax(44px, 1fr)); }
}
@container (max-width: 365px) {
    .header-bar .header-menu[data-menu-items="8"] { grid-template-columns: repeat(4, minmax(44px, 1fr)); }
}
@container (max-width: 331px) {
    .header-bar .header-menu[data-menu-items="7"] { grid-template-columns: repeat(4, minmax(44px, 1fr)); }
}