:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --bg-color: #f8fafc;
    --bg-secondary: #f1f5f9;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --bg-secondary: #1e293b;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    min-height: 100dvh;
    transition: var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Site Header */
.site-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    flex-shrink: 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-desc {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-form {
    display: flex;
    background: var(--bg-secondary);
    border-radius: 50px;
    overflow: hidden;
    border: 2px solid transparent;
    transition: var(--transition);
}

.search-form:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.search-form input {
    border: none;
    padding: 10px 18px;
    font-size: 0.9rem;
    background: transparent;
    width: 220px;
    outline: none;
    color: var(--text-color);
}

.search-form input::placeholder {
    color: var(--text-muted);
}

.search-form button {
    background: var(--gradient-primary);
    border: none;
    padding: 10px 16px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.search-form button:hover {
    transform: scale(1.05);
}

.admin-link,
.submit-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 8px 16px;
    border-radius: 50px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
    white-space: nowrap;
    font-weight: 500;
}

.admin-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.submit-link {
    background: var(--gradient-secondary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.submit-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--primary-color);
    transform: rotate(15deg);
}

/* Category Nav */
.category-nav {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    position: sticky;
    top: 74px;
    z-index: 90;
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 50px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--bg-secondary);
    transition: var(--transition);
    white-space: nowrap;
    border: 2px solid transparent;
}

.nav-item:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.nav-item.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.nav-icon {
    width: 18px;
    height: 18px;
    border-radius: 4px;
}

.subcategory-nav {
    background: var(--bg-secondary);
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.subcategory-nav .nav-item {
    background: var(--card-bg);
    font-size: 0.8rem;
}

/* Main Content */
.main-content {
    padding: 30px 0;
    min-height: calc(100vh - 300px);
}

.search-result-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 16px 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.search-result-info strong {
    color: var(--primary-color);
}

/* Link Section */
.link-section {
    margin-bottom: 48px;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.subcat-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 4px;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.link-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}

.link-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.link-card:hover::before {
    opacity: 1;
}

.link-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.link-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.link-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-color);
}

.favorite-star {
    font-size: 0.85rem;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.link-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.link-meta {
    flex-shrink: 0;
    text-align: right;
}

.click-count {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 4px 10px;
    border-radius: 50px;
    font-weight: 500;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    animation: fadeInUp 0.5s ease;
}

.empty-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.empty-state h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* Footer */
.site-footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: var(--transition);
}

.disclaimer-section {
    max-width: 800px;
    margin: 24px auto 0;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    text-align: left;
}

.disclaimer-section h4 {
    color: var(--text-color);
    font-size: 1rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.disclaimer-section > p {
    font-size: 0.85rem;
    line-height: 1.7;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.disclaimer-list {
    margin: 0 0 16px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.disclaimer-item {
    margin-bottom: 8px;
    line-height: 1.6;
    padding-left: 16px;
    position: relative;
}

.disclaimer-item::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.contact-link {
    text-align: center;
    padding-top: 16px;
    border-top: 1px dashed var(--border-color);
}

.contact-link a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 10px 20px;
    border-radius: 50px;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}

.contact-link a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Modal */
.image-modal {
    display: none !important;
    position: fixed !important;
    z-index: 99999 !important;
    left: 0 !important;
    top: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background-color: rgba(0, 0, 0, 0.95) !important;
    justify-content: center !important;
    align-items: center !important;
    cursor: pointer;
    flex-direction: row !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.image-modal .modal-content {
    max-width: 85vw !important;
    max-height: 85vh !important;
    width: auto !important;
    height: auto !important;
    object-fit: contain !important;
    border-radius: var(--radius) !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5) !important;
    animation: zoomIn 0.3s ease !important;
    margin: auto !important;
    display: block !important;
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.image-modal .close-btn {
    position: fixed;
    top: 24px;
    right: 32px;
    color: #fff;
    font-size: 36px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    z-index: 10000;
    background: rgba(255, 255, 255, 0.1);
}

.image-modal .close-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    touch-action: manipulation;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8rem;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

/* Skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--border-color) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Page Loader */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.page-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Mobile Optimizations */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 0 12px;
    }

    .site-header {
        padding: 10px 0;
        top: 0;
    }

    .header-content {
        flex-direction: column;
        gap: 10px;
    }

    .logo {
        width: 100%;
        justify-content: center;
    }

    .logo h1 {
        font-size: 1.2rem;
    }

    .site-desc {
        font-size: 0.7rem;
    }

    .header-actions {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr auto auto;
        gap: 8px;
    }

    .search-form {
        grid-column: 1 / -1;
        order: 0;
    }

    .search-form input {
        width: 100%;
        flex: 1;
        padding: 10px 14px;
        font-size: 16px; /* Prevent zoom on iOS */
    }

    .search-form button {
        padding: 10px 14px;
    }

    .admin-link,
    .submit-link {
        font-size: 0.75rem;
        padding: 8px 12px;
        text-align: center;
        justify-content: center;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .category-nav {
        padding: 8px 0;
        top: 60px;
    }

    .nav-wrapper {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 5px;
        gap: 6px;
        scrollbar-width: none;
    }

    .nav-wrapper::-webkit-scrollbar {
        display: none;
    }

    .nav-item {
        font-size: 0.8rem;
        padding: 6px 12px;
        flex-shrink: 0;
    }

    .subcategory-nav {
        padding: 8px 0;
    }

    .main-content {
        padding: 16px 0;
    }

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

    .link-section {
        margin-bottom: 24px;
    }

    .section-title {
        font-size: 1.1rem;
        margin-bottom: 12px;
        padding-bottom: 8px;
    }

    .link-card {
        padding: 14px;
        gap: 12px;
    }

    .link-icon {
        width: 44px;
        height: 44px;
    }

    .link-title {
        font-size: 0.95rem;
    }

    .link-desc {
        font-size: 0.8rem;
    }

    .click-count {
        font-size: 0.7rem;
        padding: 3px 8px;
    }

    .search-result-info {
        flex-direction: column;
        gap: 10px;
        text-align: center;
        padding: 12px 16px;
    }

    .empty-state {
        padding: 60px 16px;
    }

    .empty-icon {
        font-size: 4rem;
    }

    .empty-state h2 {
        font-size: 1.3rem;
    }

    .site-footer {
        padding: 16px 0;
        font-size: 0.8rem;
    }

    .disclaimer-section {
        margin: 16px 12px 0;
        padding: 16px;
    }

    .disclaimer-section h4 {
        font-size: 0.95rem;
    }

    .disclaimer-item {
        font-size: 0.8rem;
        margin-bottom: 6px;
    }

    .contact-link a {
        font-size: 0.85rem;
        padding: 8px 16px;
    }

    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }

    .image-modal .close-btn {
        top: 16px;
        right: 16px;
        width: 40px;
        height: 40px;
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 10px;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1.2rem;
    }

    .header-actions {
        gap: 6px;
    }

    .admin-link,
    .submit-link {
        font-size: 0.7rem;
        padding: 6px 10px;
    }

    .nav-item {
        font-size: 0.75rem;
        padding: 5px 10px;
    }

    .link-card {
        padding: 12px;
        gap: 10px;
    }

    .link-icon {
        width: 40px;
        height: 40px;
    }

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

    .link-desc {
        font-size: 0.75rem;
    }

    .click-count {
        font-size: 0.65rem;
        padding: 2px 6px;
    }

    .disclaimer-section {
        padding: 12px;
    }

    .disclaimer-item {
        line-height: 1.5;
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .link-card:hover {
        transform: none;
    }
    
    .link-card:active {
        transform: scale(0.98);
    }
    
    .nav-item:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
    
    .btn:active {
        transform: scale(0.95);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #0f172a;
        --bg-secondary: #1e293b;
        --card-bg: #1e293b;
        --text-color: #f1f5f9;
        --text-muted: #94a3b8;
        --border-color: #334155;
    }
}