:root {
    --bg-primary: #F5F7FA;
    --bg-secondary: #E8EEF5;
    --bg-card: #FFFFFF;
    --primary: #6B8AF6;
    --primary-light: #A8C0FF;
    --primary-dark: #5A7AE5;
    --text-primary: #1A1F36;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border: rgba(107, 138, 246, 0.1);
    --shadow-light: rgba(107, 138, 246, 0.08);
    --shadow-medium: rgba(107, 138, 246, 0.12);
    --shadow-dark: rgba(107, 138, 246, 0.2);
    --radius: 16px;
    --radius-sm: 12px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(245, 247, 250, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px var(--shadow-light);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.35rem;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.6rem;
}

.logo-text {
    background: linear-gradient(135deg, #8B5CF6 0%, #A855F7 50%, #6366F1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: -0.5px;
    font-size: 1.15rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 10px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(107, 138, 246, 0.08);
}

.nav-link.active {
    color: var(--primary);
    background: rgba(107, 138, 246, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.main-content {
    padding: 120px 0 80px;
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: 48px;
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.page-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 0 16px;
}

.category-tab {
    padding: 12px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.category-tab:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.category-tab.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(107, 138, 246, 0.3);
}

.bookmarks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.bookmark-card {
    display: block;
    background: linear-gradient(165deg, #ffffff 0%, #f8f9fb 50%, #f0f2f5 100%);
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.04),
        0 4px 8px rgba(0, 0, 0, 0.08),
        0 8px 16px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.6);
    position: relative;
    overflow: hidden;
}

.bookmark-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 8px;
    right: 8px;
    height: 4px;
    background: linear-gradient(90deg, transparent, rgba(107, 138, 246, 0.15), transparent);
    border-radius: 0 0 14px 14px;
    opacity: 0;
    transition: var(--transition);
}

.bookmark-card:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.06),
        0 8px 16px rgba(0, 0, 0, 0.1),
        0 16px 32px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.bookmark-card:hover::after {
    opacity: 1;
}

.bookmark-card-content {
    display: flex;
    flex-direction: column;
    padding: 16px 18px;
    min-height: 75px;
}

.bookmark-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.bookmark-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

.bookmark-category-tag {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    background: linear-gradient(135deg, rgba(107, 138, 246, 0.12) 0%, rgba(139, 92, 246, 0.12) 100%);
    color: var(--primary-dark);
    font-size: 0.65rem;
    font-weight: 600;
    border-radius: 10px;
    white-space: nowrap;
    flex-shrink: 0;
    letter-spacing: 0.2px;
    margin-top: 2px;
}

.bookmark-category-tag.tag-1 {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.12) 0%, rgba(239, 68, 68, 0.18) 100%);
    color: #ef4444;
}

.bookmark-category-tag.tag-2 {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12) 0%, rgba(59, 130, 246, 0.18) 100%);
    color: #3b82f6;
}

.bookmark-category-tag.tag-3 {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.12) 0%, rgba(34, 197, 94, 0.18) 100%);
    color: #22c55e;
}

.bookmark-category-tag.tag-4 {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.12) 0%, rgba(249, 115, 22, 0.18) 100%);
    color: #f97316;
}

.bookmark-category-tag.tag-5 {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.12) 0%, rgba(168, 85, 247, 0.18) 100%);
    color: #a855f7;
}

.bookmark-category-tag.tag-6 {
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.12) 0%, rgba(20, 184, 166, 0.18) 100%);
    color: #14b8a6;
}

.bookmark-category-tag.tag-7 {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(99, 102, 241, 0.18) 100%);
    color: #6366f1;
}

.bookmark-category-tag.tag-8 {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.12) 0%, rgba(236, 72, 153, 0.18) 100%);
    color: #ec4899;
}

.bookmark-category-tag.tag-9 {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.12) 0%, rgba(14, 165, 233, 0.18) 100%);
    color: #0ea5e9;
}

.bookmark-category-tag.tag-10 {
    background: linear-gradient(135deg, rgba(234, 179, 8, 0.12) 0%, rgba(234, 179, 8, 0.18) 100%);
    color: #eab308;
}

.bookmark-category-tag.tag-11 {
    background: linear-gradient(135deg, rgba(132, 204, 22, 0.12) 0%, rgba(132, 204, 22, 0.18) 100%);
    color: #84cc16;
}

.bookmark-category-tag.tag-12 {
    background: linear-gradient(135deg, rgba(244, 63, 94, 0.12) 0%, rgba(244, 63, 94, 0.18) 100%);
    color: #f43f5e;
}

.bookmark-category-tag.tag-13 {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.12) 0%, rgba(6, 182, 212, 0.18) 100%);
    color: #06b6d4;
}

.bookmark-category-tag.tag-14 {
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.12) 0%, rgba(251, 146, 60, 0.18) 100%);
    color: #fb923c;
}

.bookmark-category-tag.tag-15 {
    background: linear-gradient(135deg, rgba(192, 132, 252, 0.12) 0%, rgba(192, 132, 252, 0.18) 100%);
    color: #c084fc;
}

.bookmark-category-tag.tag-16 {
    background: linear-gradient(135deg, rgba(45, 212, 191, 0.12) 0%, rgba(45, 212, 191, 0.18) 100%);
    color: #2dd4bf;
}

.bookmark-category-tag.tag-17 {
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.12) 0%, rgba(129, 140, 248, 0.18) 100%);
    color: #818cf8;
}

.bookmark-category-tag.tag-18 {
    background: linear-gradient(135deg, rgba(251, 113, 133, 0.12) 0%, rgba(251, 113, 133, 0.18) 100%);
    color: #fb7185;
}

.bookmark-category-tag.tag-19 {
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.12) 0%, rgba(74, 222, 128, 0.18) 100%);
    color: #4ade80;
}

.bookmark-category-tag.tag-20 {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.12) 0%, rgba(96, 165, 250, 0.18) 100%);
    color: #60a5fa;
}

.bookmark-category-tag.tag-0 {
    background: linear-gradient(135deg, rgba(149, 165, 166, 0.12) 0%, rgba(127, 140, 141, 0.18) 100%);
    color: #7f8c8d;
}

.bookmark-body {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    flex: 1;
}

.bookmark-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex: 1;
    min-width: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bookmark-arrow {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: var(--transition);
    flex-shrink: 0;
    align-self: flex-start;
    margin-top: 2px;
}

.bookmark-card:hover .bookmark-arrow {
    color: var(--primary);
    transform: translateX(3px);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.empty-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.admin-content {
    padding: 120px 0 80px;
    min-height: 100vh;
}

.admin-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 32px;
}

.admin-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: 0 4px 16px var(--shadow-light);
}

.admin-section .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.admin-section .section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    justify-content: center;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: white;
    box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background: var(--border);
}

.category-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.category-item.active {
    background: linear-gradient(135deg, rgba(107, 138, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    border-left: 3px solid var(--primary);
    box-shadow: 0 2px 8px rgba(107, 138, 246, 0.2);
}

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

.category-name {
    flex: 1;
    font-weight: 500;
    color: var(--text-primary);
}

.category-order {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.category-actions {
    display: flex;
    gap: 8px;
}

.btn-icon-only {
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 8px;
    transition: var(--transition);
}

.btn-icon-only:hover {
    background: var(--border);
}

.btn-icon-only.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.bookmark-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 600px;
    overflow-y: auto;
}

.bookmark-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.bookmark-item:hover {
    background: var(--bg-secondary);
}

.bookmark-info {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
    min-width: 0;
}

.bookmark-favicon {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    flex-shrink: 0;
}

.bookmark-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.bookmark-item .bookmark-name {
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    max-width: none;
}

.bookmark-item .bookmark-url {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}

.bookmark-item .bookmark-category-tag {
    font-size: 0.7rem;
    padding: 2px 8px;
}

.bookmark-desc-preview {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
}

.bookmark-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    width: 100%;
    max-width: 440px;
    margin: 20px;
    transform: translateY(-20px);
    transition: var(--transition);
}

.modal-content.modal-lg {
    max-width: 520px;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: var(--transition);
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(107, 138, 246, 0.1);
}

.required {
    color: #ef4444;
    margin-left: 2px;
}

.char-count {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 28px;
}

.footer {
    padding: 40px 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, #D8E2F0 100%);
    border-top: 1px solid var(--border);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo {
    font-size: 1.75rem;
}

.footer-name {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, #8B5CF6 0%, #A855F7 50%, #6366F1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--primary);
}

.footer-domain {
    font-size: 1rem;
    font-weight: 500;
}

.footer-divider {
    color: var(--text-muted);
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--text-muted);
}

@media (max-width: 1024px) {
    .admin-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        box-shadow: 0 10px 40px var(--shadow-medium);
        border-radius: 0 0 var(--radius) var(--radius);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .main-content,
    .admin-content {
        padding: 100px 0 60px;
    }

    .category-tabs {
        gap: 8px;
    }

    .category-tab {
        padding: 10px 20px;
        font-size: 0.875rem;
    }

    .bookmarks-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .bookmark-item .bookmark-url {
        max-width: 200px;
    }

    .admin-section {
        padding: 20px;
    }

    .bookmark-list {
        max-height: 400px;
    }

    .modal-content {
        margin: 16px;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .page-title {
        font-size: 1.75rem;
    }

    .bookmark-card-content {
        padding: 12px 14px;
    }

    .bookmark-name {
        font-size: 0.85rem;
    }

    .bookmark-category-tag {
        font-size: 0.6rem;
        padding: 2px 6px;
    }

    .bookmark-desc {
        font-size: 0.72rem;
    }

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