/* ============================================
   My Bookmarks - 响应式样式
   移动端优先，逐步增强
   作者：AI虎哥 QQ：282865654 https://3se.cc
   ============================================ */

/* --- CSS 变量 --- */
:root {
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #eef2ff;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;
    --sidebar-width: 240px;
    --header-height: 60px;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 6px 10px rgba(0,0,0,0.08);
    --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 200;
    gap: 12px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
}

.logo svg { flex-shrink: 0; }

.header-center {
    flex: 1;
    max-width: 480px;
    min-width: 0;
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    height: 40px;
    padding: 0 36px 0 40px;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background: var(--color-bg);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    display: none;
    padding: 2px;
    border-radius: 50%;
}

.search-clear:hover { color: var(--color-text); }
.search-clear.visible { display: block; }

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}
.btn-secondary:hover { background: var(--color-border); }

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover { background: var(--color-danger-hover); }

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
    flex-shrink: 0;
}
.btn-icon:hover { background: var(--color-bg); }

/* --- Dropdown --- */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    min-width: 180px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    z-index: 300;
    display: none;
}

.dropdown-menu.show { display: block; }

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: background var(--transition);
    text-align: left;
}
.dropdown-item:hover { background: var(--color-bg); }

.dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: 4px 0;
}

/* --- Main Wrapper --- */
.main-wrapper {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: 280px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    z-index: 150;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    top: var(--header-height);
    background: rgba(0,0,0,0.3);
    z-index: 140;
    display: none;
}

.sidebar-overlay.show { display: block; }

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 16px 8px;
}

.sidebar-header h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    font-weight: 600;
}

.btn-add-category {
    width: 32px;
    height: 32px;
    color: var(--color-text-muted);
}
.btn-add-category:hover { color: var(--color-primary); }

.category-list {
    padding: 0 8px 16px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.category-item:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.category-item.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
}

.category-icon {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.category-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.category-count {
    font-size: 0.75rem;
    background: var(--color-bg);
    padding: 2px 8px;
    border-radius: 10px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.category-item.active .category-count {
    background: rgba(79, 70, 229, 0.15);
    color: var(--color-primary);
}

.category-divider {
    height: 1px;
    background: var(--color-border);
    margin: 8px 12px;
}

/* --- Content --- */
.content {
    flex: 1;
    padding: 20px 16px;
    max-width: 100%;
    min-width: 0;
}

/* --- Toolbar --- */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 12px;
}

.toolbar-left {
    display: flex;
    align-items: baseline;
    gap: 12px;
    min-width: 0;
}

.current-title {
    font-size: 1.25rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bookmark-count {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.view-toggle {
    color: var(--color-text-muted);
}

/* --- Bookmark Grid --- */
.bookmark-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.bookmark-grid.list-view {
    grid-template-columns: 1fr !important;
}

/* --- Bookmark Card --- */
.bookmark-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px;
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow: hidden;
    min-width: 0;
    max-width: 100%;
}

.bookmark-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.bookmark-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    overflow: hidden;
}

.bookmark-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.bookmark-icon img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.bookmark-icon .icon-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    border-radius: var(--radius-sm);
}

.bookmark-info {
    flex: 1;
    min-width: 0;
}

.bookmark-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    word-break: break-all;
}

.bookmark-url {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    word-break: break-all;
}

.bookmark-desc {
    font-size: 0.825rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bookmark-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 500;
}

.bookmark-actions {
    position: absolute;
    top: 12px;
    right: 12px;
    display: none;
    gap: 4px;
}

.bookmark-card:hover .bookmark-actions {
    display: flex;
}

.bookmark-actions .btn-icon {
    width: 32px;
    height: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.bookmark-actions .btn-icon:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* List view card */
.list-view .bookmark-card {
    flex-direction: row;
    align-items: center;
    padding: 12px 16px;
    gap: 16px;
}

.list-view .bookmark-card-header {
    flex: 1;
    min-width: 0;
}

.list-view .bookmark-desc { display: none; }
.list-view .bookmark-tags { display: none; }

/* --- Loading & Empty States --- */
.loading-state, .empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
    text-align: center;
}

.loading-state p, .empty-state h3 {
    margin-top: 16px;
}

.empty-state p {
    margin-top: 8px;
    font-size: 0.9rem;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- FAB (Floating Action Button) --- */
.fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-lg);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: transform var(--transition), box-shadow var(--transition);
}

.fab:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 30px rgba(79, 70, 229, 0.35);
}

.fab:active { transform: scale(0.95); }

.mobile-search-toggle { display: none; }

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s, visibility 0.25s;
    padding: 16px;
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px) scale(0.97);
    transition: transform 0.25s;
}

.modal-overlay.show .modal {
    transform: translateY(0) scale(1);
}

.modal-sm { max-width: 420px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-body {
    padding: 20px 24px 24px;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.modal-footer-right {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

/* --- Form --- */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text-secondary);
}

.required { color: var(--color-danger); }

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group input[type="number"]:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea { resize: vertical; }

/* --- Tag Input --- */
.tag-input-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    min-height: 42px;
    cursor: text;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.tag-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.tag-input-wrapper input {
    border: none;
    background: none;
    outline: none;
    padding: 2px 4px;
    flex: 1;
    min-width: 120px;
    font-size: 0.875rem;
}

.tag-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.tag-remove {
    cursor: pointer;
    display: flex;
    align-items: center;
    opacity: 0.6;
    transition: opacity var(--transition);
}
.tag-remove:hover { opacity: 1; }

/* --- Category Manage List --- */
.category-add-form {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.category-add-form input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    outline: none;
}

.category-add-form input:focus {
    border-color: var(--color-primary);
}

.category-manage-list {
    list-style: none;
}

.category-manage-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9rem;
}

.category-manage-item:last-child { border-bottom: none; }

.category-manage-actions {
    display: flex;
    gap: 4px;
}

.category-manage-actions .btn-icon {
    width: 32px;
    height: 32px;
    color: var(--color-text-muted);
}

.category-manage-actions .btn-icon:hover {
    color: var(--color-danger);
}

/* --- File Drop Zone --- */
.file-drop-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition);
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.file-drop-zone p {
    margin-top: 8px;
    font-size: 0.85rem;
}

.file-name {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* --- Toast --- */
.toast-container {
    position: fixed;
    top: calc(var(--header-height) + 12px);
    right: 16px;
    z-index: 600;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    pointer-events: auto;
    animation: toastIn 0.3s ease;
    max-width: 360px;
}

.toast.success { border-left: 4px solid var(--color-success); }
.toast.error { border-left: 4px solid var(--color-danger); }
.toast.warning { border-left: 4px solid var(--color-warning); }
.toast.info { border-left: 4px solid var(--color-primary); }

.toast.hiding { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(40px); }
}

/* --- Search Highlight --- */
mark {
    background: #fef08a;
    color: inherit;
    padding: 0 1px;
    border-radius: 2px;
}

/* --- Sort Dropdown --- */
.sort-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.sort-select {
    appearance: none;
    -webkit-appearance: none;
    height: 36px;
    padding: 0 28px 0 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.sort-select:hover { border-color: var(--color-border-hover); }
.sort-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.sort-arrow {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 24px;
    padding: 16px 0;
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: all var(--transition);
    cursor: pointer;
}

.pagination-btn:hover:not(:disabled):not(.active) {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.pagination-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    font-weight: 600;
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-dots {
    display: inline-flex;
    align-items: center;
    padding: 0 4px;
    color: var(--color-text-muted);
}

.pagination-info {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0 8px;
    white-space: nowrap;
}

.pagination-jump {
    width: 60px;
    height: 36px;
    padding: 0 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    font-size: 0.85rem;
    text-align: center;
    outline: none;
    transition: border-color var(--transition);
}

.pagination-jump:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* ============================================
   响应式断点
   ============================================ */

/* 移动端 (<768px) - 基础样式已覆盖 */
@media (max-width: 767px) {
    .header-center { display: none; }
    .header-center.mobile-show {
        display: block;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        padding: 8px 16px;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        z-index: 190;
        max-width: 100%;
        animation: slideDown 0.2s ease;
    }
    .header-center.mobile-show .search-box { max-width: 100%; }
    .header-center.mobile-show .search-box input { height: 44px; font-size: 16px; }

    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .btn-add span { display: none; }
    .btn-add { padding: 8px; }

    .fab { display: flex; }

    .bookmark-actions { display: flex; }

    .menu-toggle { display: flex; }

    .mobile-search-toggle { display: flex; }

    /* 移动端书签卡片自适应优化 */
    .content { padding: 12px 10px; }

    .bookmark-card {
        padding: 12px;
        gap: 8px;
        border-radius: 8px;
        width: 100%;
        box-sizing: border-box;
    }

    .bookmark-card-header {
        gap: 10px;
    }

    .bookmark-icon {
        width: 32px;
        height: 32px;
    }

    .bookmark-icon img {
        width: 20px;
        height: 20px;
    }

    .bookmark-title {
        font-size: 0.9rem;
    }

    .bookmark-url {
        font-size: 0.75rem;
    }

    .bookmark-desc {
        font-size: 0.8rem;
        -webkit-line-clamp: 2;
    }

    /* 移动端工具栏：排序和分页 */
    .toolbar {
        flex-wrap: wrap;
        gap: 8px;
    }

    .toolbar-right {
        flex-wrap: wrap;
        gap: 6px;
    }

    .sort-select {
        font-size: 0.8rem;
        padding: 6px 28px 6px 10px;
        height: 34px;
    }

    /* 移动端分页 */
    .pagination {
        gap: 4px;
    }

    .pagination-btn {
        min-width: 32px;
        height: 32px;
        font-size: 0.8rem;
        padding: 0 6px;
    }

    .pagination-info {
        font-size: 0.75rem;
    }

    .pagination-jump {
        width: 50px;
        height: 32px;
        font-size: 0.8rem;
    }
}

/* 平板 (>=768px) */
@media (min-width: 768px) {
    .header { padding: 0 24px; }

    .menu-toggle { display: none; }

    .sidebar {
        position: static;
        width: var(--sidebar-width);
        transform: none;
        flex-shrink: 0;
    }

    .sidebar-overlay { display: none !important; }

    .content { padding: 24px; }

    .bookmark-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .fab { display: none; }
}

/* 桌面 (>=1024px) */
@media (min-width: 1024px) {
    .content { padding: 24px 32px; }

    .bookmark-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .sidebar { width: 250px; }
}

/* 大屏 (>=1440px) */
@media (min-width: 1440px) {
    .bookmark-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-border-hover); }

/* --- Selection --- */
::selection {
    background: rgba(79, 70, 229, 0.15);
    color: var(--color-text);
}

/* ============================================
   登录页样式
   ============================================ */
.login-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.login-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.login-card {
    background: var(--color-surface);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    padding: 40px 36px;
    width: 100%;
    max-width: 380px;
    text-align: center;
    animation: loginCardIn 0.4s ease;
}

@keyframes loginCardIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-header {
    margin-bottom: 28px;
    color: var(--color-text);
}

.login-header svg {
    color: var(--color-primary);
    margin-bottom: 12px;
}

.login-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-header p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.login-form .form-group {
    margin-bottom: 12px;
}

.login-form input[type="password"] {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border: 2px solid var(--color-border);
    border-radius: 10px;
    font-size: 1rem;
    background: var(--color-bg);
    outline: none;
    text-align: center;
    letter-spacing: 4px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form input[type="password"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.login-form input[type="password"].shake {
    animation: shake 0.4s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-6px); }
    80% { transform: translateX(6px); }
}

.login-error {
    font-size: 0.8rem;
    color: var(--color-danger);
    min-height: 20px;
    margin-bottom: 8px;
}

.login-btn {
    width: 100%;
    height: 48px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    justify-content: center;
}

.login-footer {
    margin-top: 24px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.spinner-sm {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 4px;
}

/* 登录页移动端适配 */
@media (max-width: 420px) {
    .login-card {
        padding: 32px 24px;
    }
    .login-header h2 {
        font-size: 1.2rem;
    }
}