/* Shared mobile-only layout fixes. Desktop styles intentionally remain untouched. */
@media (max-width: 768px) {
    :root {
        --page-padding: 12px;
        --surface-radius: 16px;
        --surface-radius-sm: 12px;
    }

    html {
        min-width: 0;
        scroll-padding-top: calc(var(--site-header-height, 64px) + 12px);
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }

    body {
        min-width: 0;
        overflow-x: clip;
    }

    body.mobile-nav-open {
        overflow: hidden;
        touch-action: none;
    }

    .header {
        background: var(--bg-header) !important;
        -webkit-backdrop-filter: blur(16px) !important;
        backdrop-filter: blur(16px) !important;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    }

    .header-content {
        width: 100%;
        min-height: 64px;
        padding: 10px max(12px, env(safe-area-inset-right)) 10px max(12px, env(safe-area-inset-left)) !important;
        display: grid;
        grid-template-columns: minmax(0, 1fr) 44px auto;
        gap: 8px;
        align-items: center;
    }

    .logo {
        min-width: 0;
        gap: 8px;
    }

    .logo-icon {
        width: 36px !important;
        height: 36px !important;
        border-radius: 11px;
    }

    .logo-text {
        min-width: 0;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 17px !important;
    }

    .mobile-menu-btn {
        display: inline-grid !important;
        width: 44px;
        height: 44px;
        padding: 0 !important;
        place-items: center;
        border: 1px solid var(--border-light) !important;
        border-radius: 12px;
        background: rgba(53, 132, 247, 0.08) !important;
        color: var(--text-primary) !important;
        font-size: 21px !important;
        line-height: 1;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }

    .mobile-menu-btn:active {
        background: rgba(53, 132, 247, 0.16) !important;
    }

    .nav {
        position: fixed !important;
        top: var(--site-header-height, 64px) !important;
        left: max(8px, env(safe-area-inset-left)) !important;
        right: max(8px, env(safe-area-inset-right)) !important;
        width: auto !important;
        max-height: calc(100dvh - var(--site-header-height, 64px) - 12px);
        padding: 12px !important;
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        overscroll-behavior: contain;
        background: var(--bg-tertiary) !important;
        -webkit-backdrop-filter: none !important;
        backdrop-filter: none !important;
        border: 1px solid var(--border-color) !important;
        border-top: 0 !important;
        border-radius: 0 0 16px 16px;
        box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
        transform: translateY(-12px) !important;
        opacity: 0 !important;
        visibility: hidden !important;
        pointer-events: none;
        z-index: 1001;
    }

    .nav.active {
        transform: translateY(0) !important;
        opacity: 1 !important;
        visibility: visible !important;
        pointer-events: auto;
    }

    .nav a {
        width: 100%;
        min-width: 0;
        min-height: 46px;
        max-width: none !important;
        padding: 10px 9px !important;
        justify-content: center !important;
        gap: 7px;
        border-radius: 11px !important;
        background: rgba(53, 132, 247, 0.08) !important;
        font-size: 13px !important;
        line-height: 1.25 !important;
        text-align: center !important;
        white-space: normal !important;
        overflow: visible !important;
        touch-action: manipulation;
    }

    .nav a.active {
        background: rgba(53, 132, 247, 0.17) !important;
    }

    .user-area {
        min-width: 0;
        justify-self: end;
        flex-wrap: nowrap !important;
        gap: 6px !important;
    }

    .btn-login,
    .btn-register {
        min-height: 40px;
        padding: 8px 12px !important;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 5px;
        border-radius: 14px !important;
        font-size: 13px !important;
        line-height: 1.1;
        white-space: nowrap;
    }

    .user-avatar {
        width: 36px !important;
        height: 36px !important;
    }

    .notification-badge {
        min-width: 40px;
        min-height: 40px;
        padding: 8px !important;
        justify-content: center;
        border-radius: 12px !important;
    }

    .notification-badge span {
        display: none;
    }

    .vip-notification {
        width: auto;
        max-width: none;
        margin: 12px max(12px, env(safe-area-inset-right)) 12px max(12px, env(safe-area-inset-left)) !important;
        padding: 12px !important;
        display: grid !important;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: start !important;
        gap: 10px !important;
        border-radius: 14px !important;
        text-align: left !important;
    }

    .vip-notification-left {
        min-width: 0;
        flex-direction: row !important;
        align-items: flex-start !important;
        gap: 10px !important;
    }

    .vip-notification-icon {
        width: 36px !important;
        height: 36px !important;
        flex: 0 0 36px;
        font-size: 15px !important;
    }

    .vip-notification-text {
        min-width: 0;
    }

    .vip-notification-title {
        margin-bottom: 2px !important;
        font-size: 14px;
        line-height: 1.35;
    }

    .vip-notification-desc {
        font-size: 12px !important;
        line-height: 1.55;
        overflow-wrap: anywhere;
    }

    .vip-node-list {
        margin-top: 3px !important;
        display: flex;
        flex-wrap: wrap;
        gap: 2px 8px;
        white-space: normal !important;
    }

    .vip-node-list span {
        display: inline !important;
    }

    .vip-node-list .vip-node-separator {
        display: none !important;
    }

    .vip-notification-actions {
        grid-column: 1 / -1;
        width: 100%;
        justify-content: flex-end;
        gap: 8px !important;
    }

    .vip-notification-hide,
    .vip-notification-close {
        min-height: 38px;
        padding: 7px 11px !important;
        border-radius: 10px !important;
        font-size: 12px !important;
        touch-action: manipulation;
    }

    .vip-notification-hide {
        min-width: 0 !important;
        flex: 1 1 auto;
        max-width: 170px;
    }

    .vip-notification-close {
        width: 38px;
        flex: 0 0 38px;
    }

    .page-shell,
    .page-container,
    .content-container {
        width: calc(100% - 24px) !important;
        min-width: 0;
    }

    /* Reduce vertical whitespace between content blocks without shrinking card interiors. */
    .hero {
        padding-top: 24px !important;
        padding-bottom: 28px !important;
    }

    .search-page,
    main.container,
    .main-content {
        padding-top: 14px !important;
        padding-bottom: 16px !important;
    }

    .breadcrumb {
        margin-bottom: 12px !important;
    }

    .section-header,
    .results-header,
    .card-header,
    .panel-header {
        margin-bottom: 12px !important;
    }

    .content-grid,
    .categories-grid,
    .hap-grid,
    .stats-grid,
    .form-grid,
    .settings-grid,
    .profile-grid,
    .dashboard-grid,
    .category-service-grid {
        row-gap: 12px !important;
    }

    .app-header,
    .profile-header {
        row-gap: 16px !important;
    }

    main > section + section,
    main > .section + .section,
    .container > .card + .card,
    .container > .section-card + .section-card,
    .container > .surface-card + .surface-card,
    .container > .panel + .panel,
    .container > .form-section + .form-section,
    .main-content > .card + .card,
    .main-content > .panel + .panel {
        margin-top: 12px !important;
    }

    .form-section,
    .content-section,
    .settings-section {
        margin-bottom: 14px !important;
    }

    main,
    main > *,
    .container,
    .main-content,
    .content-grid,
    .card,
    .section-card,
    .surface-card,
    form,
    fieldset {
        min-width: 0;
        max-width: 100%;
    }

    img,
    video,
    canvas,
    iframe {
        max-width: 100%;
    }

    input:not([type="checkbox"]):not([type="radio"]),
    textarea,
    select {
        max-width: 100%;
        min-width: 0;
        font-size: 16px !important;
    }

    textarea {
        resize: vertical;
    }

    button,
    [role="button"],
    .btn,
    .button,
    .tab-btn,
    .page-btn {
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }

    .btn,
    .button,
    .agreement-btn {
        min-height: 42px;
    }

    .tabs,
    .tab-list,
    .tab-nav,
    .filter-tabs,
    .category-tabs {
        max-width: 100%;
        justify-content: flex-start !important;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
    }

    .tabs::-webkit-scrollbar,
    .tab-list::-webkit-scrollbar,
    .tab-nav::-webkit-scrollbar,
    .filter-tabs::-webkit-scrollbar,
    .category-tabs::-webkit-scrollbar {
        display: none;
    }

    .actions,
    .button-group,
    .btn-group,
    .form-actions,
    .form-actions-bottom,
    .submission-actions,
    .app-actions {
        max-width: 100%;
        flex-wrap: wrap;
    }

    .pagination {
        width: 100%;
        max-width: 100%;
        padding: 16px 0 !important;
        gap: 6px !important;
        flex-wrap: wrap;
    }

    .pagination .page-btn {
        min-width: 38px;
        height: 38px;
        flex: 0 0 auto;
    }

    .pagination .page-dots {
        padding: 0 2px;
    }

    :where(main, .modal-content) table {
        display: block;
        width: 100%;
        max-width: 100%;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
    }

    pre,
    code,
    .code-block {
        max-width: 100%;
        overflow-wrap: anywhere;
        word-break: break-word;
    }

    pre,
    .code-block {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .modal,
    .modal-overlay,
    .agreement-modal-overlay,
    .moderation-overlay {
        padding: 12px !important;
    }

    .modal-content,
    .agreement-modal,
    .moderation-content {
        width: min(100%, 560px) !important;
        max-width: calc(100vw - 24px) !important;
        max-height: calc(100dvh - 24px) !important;
        margin: auto !important;
        overflow-y: auto;
    }

    .agreement-modal-header {
        padding: 18px 16px 14px !important;
    }

    .agreement-modal-header h2 {
        font-size: 20px !important;
    }

    .agreement-modal-body {
        padding: 16px !important;
    }

    .agreement-item {
        gap: 10px !important;
        padding: 12px !important;
        margin-bottom: 10px !important;
    }

    .agreement-item-content label {
        font-size: 14px !important;
        line-height: 1.5;
    }

    .agreement-item-content .desc {
        font-size: 12px !important;
        line-height: 1.5;
    }

    .agreement-modal-footer {
        padding: 14px 16px 16px !important;
    }
}

/* Primary target: 1316x2832 at 560 dpi, approximately 376x809 CSS pixels. */
@media (max-width: 390px) {
    .header-content {
        min-height: 60px;
        grid-template-columns: minmax(0, 1fr) 42px auto;
        padding-top: 9px !important;
        padding-bottom: 9px !important;
    }

    .logo-icon {
        width: 34px !important;
        height: 34px !important;
    }

    .logo-text {
        font-size: 16px !important;
    }

    .mobile-menu-btn {
        width: 42px;
        height: 42px;
    }

    .btn-login,
    .btn-register {
        min-height: 38px;
        padding: 7px 10px !important;
        font-size: 12px !important;
    }

    .nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 10px !important;
    }

    .nav a {
        min-height: 44px;
        font-size: 12px !important;
    }

    .vip-notification {
        margin: 10px !important;
        padding: 11px !important;
    }

    .vip-notification-title {
        font-size: 13px;
    }

    .vip-notification-desc {
        font-size: 11px !important;
    }

    .section-card,
    .surface-card,
    .card {
        border-radius: 14px;
    }
}

@media (max-width: 340px) {
    .header-content {
        gap: 6px;
        padding-left: 8px !important;
        padding-right: 8px !important;
    }

    .logo {
        gap: 6px;
    }

    .logo-text {
        font-size: 15px !important;
    }

    .btn-login,
    .btn-register {
        width: 38px;
        padding: 0 !important;
        font-size: 0 !important;
    }

    .btn-login i,
    .btn-register i {
        font-size: 15px;
    }

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

    .pagination {
        gap: 4px !important;
    }

    .pagination .page-btn {
        min-width: 36px;
        height: 36px;
    }
}

@media (prefers-reduced-motion: reduce) and (max-width: 768px) {
    .nav,
    .mobile-menu-btn {
        transition: none !important;
    }
}