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

:root {
    --primary: #f59e0b;
    --primary-light: #fbbf24;
    --primary-dark: #d97706;
    --gold: #fbbf24;
    --gold-dark: #b45309;
    --orange: #f97316;
    --green: #10b981;
    --green-light: #34d399;
    
    --bg-body: #f8f8fa;
    --bg-card: #ffffff;
    --bg-light: #f0f0f0;
    --bg-dark: #e8e8e8;
    
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-muted: #6b728b;
    
    --border: #e5e7eb;
    --border-light: #d4d4d4;
    
    --shadow: 0 2px 8px rgba(0,0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    --radius: 12px;
    --radius-lg: 16px;
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
}

a { color: var(--gold); text-decoration: none; transition: all 0.3s; }
a:hover { color: var(--orange); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--orange) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

.nav { display: flex; gap: 4px; }

.nav a {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 8px;
    font-size: 0.95rem;
}

.nav a:hover { background: var(--bg-light); color: var(--text-primary); }
.nav a.active { background: linear-gradient(135deg, var(--gold), var(--orange)); color: #000; font-weight: 600; }

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #fff9e0 0%, #f8f8fa 50%, #fff7e0 100%);
    padding: 70px 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(251, 191, 36, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    position: relative;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
    position: relative;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    position: relative;
}

.stat-item { text-align: center; }
.stat-number { 
    font-size: 2.2rem; 
    font-weight: 800; 
    background: linear-gradient(135deg, var(--gold), var(--orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label { font-size: 0.9rem; color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary { 
    background: linear-gradient(135deg, var(--gold), var(--orange)); 
    color: #000; 
    box-shadow: 0 4px 16px rgba(251, 191, 36, 0.3);
}
.btn-primary:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 6px 24px rgba(251, 191, 36, 0.4);
}

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

.btn-accent { background: linear-gradient(135deg, var(--gold), var(--orange)); color: #000; font-weight: 600; }
.btn-accent:hover { box-shadow: 0 4px 16px rgba(251, 191, 36, 0.4); }

.btn-danger { background: #ef4444; color: white; }
.btn-success { background: var(--green); color: white; }

/* Ad Banner */
.ad-banner {
    background: var(--bg-card);
    border: 2px dashed var(--border-light);
    border-radius: var(--radius);
    padding: 20px;
    margin: 20px 0;
    text-align: center;
    color: var(--text-muted);
}

.ad-inline { margin: 30px 0; }

.ad-sidebar {
    background: var(--bg-card);
    border: 2px dashed var(--border-light);
    border-radius: var(--radius);
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    margin: 20px 0;
}

/* Section */
.section { margin: 40px 0; }

.section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-title h2 {
    font-size: 1.4rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title a { font-size: 0.9rem; font-weight: 500; }

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.video-grid-featured {
    grid-template-columns: repeat(4, 1fr);
}

.video-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.featured-video-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.video-card.video-large {
    display: flex;
    flex-direction: column;
}

.video-card.video-large .video-thumbnail {
    aspect-ratio: 16/9;
}

.video-card.video-large .video-placeholder-inner {
    font-size: 4rem;
}

.video-card.video-large .video-info {
    padding: 20px;
}

.video-card.video-large .video-title {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.video-card.video-large .video-desc {
    display: block;
}

.video-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    border: 1px solid var(--border);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.15);
    border-color: var(--gold);
}

.video-card.featured {
    grid-column: span 2;
    grid-row: span 2;
}

.video-thumbnail {
    position: relative;
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #e8e8e8 0%, #f0f0f0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-placeholder-inner {
    font-size: 3rem;
    opacity: 0.9;
}

.video-card.featured .video-placeholder-inner {
    font-size: 5rem;
}

.video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--gold), var(--orange));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #000;
    opacity: 0;
    transition: all 0.3s;
}

.video-card:hover .video-play { opacity: 1; }

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.85);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: white;
}

.video-info { padding: 14px; }

.video-category {
    display: inline-block;
    padding: 3px 10px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(249, 115, 22, 0.2));
    color: var(--gold);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 8px;
}

.video-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
    line-height: 1.4;
    color: var(--text-primary);
}

.video-card.featured .video-title { font-size: 1.2rem; }

.video-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.video-meta {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Method Grid */
.method-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.method-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.method-card:hover {
    border-color: var(--gold);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.1);
}

.method-icon { font-size: 2.5rem; margin-bottom: 12px; }

.method-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.method-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.method-count {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--gold), var(--orange));
    color: #000;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 20px;
}

/* Article Grid */
.article-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.article-grid-small { grid-template-columns: repeat(2, 1fr); }

/* Article List */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.article-item {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 18px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.article-item:hover {
    border-color: var(--gold);
}

.article-item-category {
    display: inline-block;
    padding: 3px 10px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(249, 115, 22, 0.2));
    color: var(--gold);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 10px;
}

.article-item-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.article-item-title a {
    color: var(--text-primary);
}

.article-item-title a:hover {
    color: var(--gold);
}

.article-item-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-item-meta {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Home Split */
.home-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.home-split-left {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.home-split-right {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.video-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.card:hover { border-color: var(--gold); }

.card-body { padding: 18px; }

.card-category {
    display: inline-block;
    padding: 3px 10px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(249, 115, 22, 0.2));
    color: var(--gold);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 10px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-title a { color: var(--text-primary); }
.card-title a:hover { color: var(--gold); }

.card-meta {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Video Page */
.video-page-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 30px;
}

.video-player {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
}

.video-player-wrapper {
    aspect-ratio: 16/9;
    background: #000;
    position: relative;
}

.video-player-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-player-info { padding: 20px; }
.video-player-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 12px; }
.video-player-meta { display: flex; gap: 16px; color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
.video-player-desc { color: var(--text-secondary); line-height: 1.7; }

.video-sidebar { display: flex; flex-direction: column; gap: 12px; }

.video-sidebar-item {
    display: flex;
    gap: 12px;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
}

.video-sidebar-item:hover { background: var(--bg-light); }

.video-sidebar-thumb {
    width: 160px;
    aspect-ratio: 16/9;
    background: var(--bg-light);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.video-sidebar-info { padding: 10px 10px 10px 0; flex: 1; }
.video-sidebar-title { font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; line-height: 1.3; }
.video-sidebar-meta { font-size: 0.75rem; color: var(--text-muted); }

/* Message Board */
.message-board {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 30px;
}

.message-board h1 { font-size: 1.5rem; margin-bottom: 8px; }
.message-board > p { color: var(--text-muted); margin-bottom: 24px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.9rem; }

.form-control {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus { outline: none; border-color: var(--gold); }
.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { min-height: 120px; resize: vertical; }

.message-list { margin-top: 30px; }
.message-list h3 { font-size: 1.1rem; margin-bottom: 16px; }

.message-item {
    background: var(--bg-light);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
}

.message-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.message-author { font-weight: 600; color: var(--gold); }
.message-time { font-size: 0.8rem; color: var(--text-muted); }
.message-text { color: var(--text-secondary); line-height: 1.6; }

/* Footer */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 50px 0 30px;
    margin-top: 50px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-section p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }
.footer-section a { display: block; color: var(--text-muted); margin-bottom: 10px; font-size: 0.9rem; }
.footer-section a:hover { color: var(--gold); }

.ad-footer {
    background: var(--bg-card);
    border: 2px dashed var(--border-light);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-muted);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 30px;
}

.pagination a, .pagination span {
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.pagination a:hover, .pagination .active {
    background: linear-gradient(135deg, var(--gold), var(--orange));
    color: #000;
    border-color: var(--gold);
}

/* Filter Bar */
.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.filter-bar .form-control { width: auto; min-width: 180px; }

/* Admin */
.admin-panel { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.admin-panel.hidden, .admin-login.hidden { display: none; }

.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-body);
}

.login-box {
    background: var(--bg-card);
    padding: 36px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 380px;
    border: 1px solid var(--border);
}

.login-box h2 { text-align: center; margin-bottom: 28px; }

.admin-sidebar {
    background: var(--bg-dark);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    position: fixed;
    width: 240px;
    height: 100vh;
}

.admin-logo { padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.admin-logo h2 { font-size: 1.1rem; color: var(--text-primary); }

.admin-nav { list-style: none; }
.admin-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.admin-nav a:hover, .admin-nav a.active {
    background: var(--bg-card);
    color: var(--gold);
}

.admin-main { margin-left: 240px; padding: 24px; background: var(--bg-body); }

.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.admin-header h1 { font-size: 1.5rem; }

.admin-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.admin-card h3 {
    font-size: 1rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--border);
}

.stat-card h4 { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 6px; }
.stat-card .number { 
    font-size: 1.8rem; 
    font-weight: 800; 
    background: linear-gradient(135deg, var(--gold), var(--orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.table-responsive { overflow-x: auto; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { background: var(--bg-light); font-weight: 600; color: var(--text-muted); font-size: 0.8rem; text-transform: uppercase; }
.data-table tr:hover td { background: var(--bg-light); }

.action-btns { display: flex; gap: 6px; }
.action-btns .btn { padding: 6px 12px; font-size: 0.8rem; }

.editor-toolbar {
    display: flex;
    gap: 4px;
    padding: 10px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 8px 8px 0 0;
    flex-wrap: wrap;
}

.editor-toolbar button {
    padding: 8px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.editor-toolbar button:hover { background: var(--gold); color: #000; border-color: var(--gold); }

.editor-content {
    min-height: 250px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 0 0 8px 8px;
    background: var(--bg-light);
    color: var(--text-primary);
    outline: none;
}

.editor-content:focus { border-color: var(--gold); }

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 14px 24px;
    background: var(--green);
    color: white;
    border-radius: 8px;
    z-index: 9999;
    animation: slideIn 0.3s ease;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .video-grid, .video-grid-featured, .video-grid-4 { grid-template-columns: repeat(1, 1fr); }
    .video-card.featured { grid-column: span 2; grid-row: span 1; }
    .featured-video-grid { grid-template-columns: 1fr; }
    .method-grid { grid-template-columns: repeat(1, 1fr); }
    .footer-grid { grid-template-columns: repeat(1, 1fr); }
    .stats-grid { grid-template-columns: repeat(1, 1fr); }
    .video-page-grid { grid-template-columns: 1fr; }
    .home-split { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 12px;
        border-top: 1px solid var(--border);
    }
    .nav.active { display: flex; }
    .mobile-menu-btn { display: block; }
    
    .hero { padding: 40px 0; }
    .hero h1 { font-size: 1.8rem; }
    .hero-stats { gap: 30px; flex-wrap: wrap; }
    .stat-number { font-size: 1.5rem; }
    
    .video-grid, .video-grid-featured, .video-grid-4, .video-grid-2 { grid-template-columns: 1fr; }
    .video-card.featured { grid-column: span 1; }
    .featured-video-grid { grid-template-columns: 1fr; }
    .method-grid { grid-template-columns: 1fr; }
    .article-grid, .article-grid-small { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 20px; }
    .home-split { grid-template-columns: 1fr; }
    
    .admin-panel { grid-template-columns: 1fr; }
    .admin-sidebar { display: none; }
    .admin-main { margin-left: 0; }
    .stats-grid { grid-template-columns: 1fr; }
    
    .filter-bar { flex-direction: column; align-items: stretch; }
    .filter-bar .form-control { width: 100%; }
}