:root {
    --bg-main: #f4f6f9;
    --bg-header: #0b1325;
    --bg-card: #ffffff;
    --bg-sub: #ebf0f7;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --primary: #1e40af;
    --primary-hover: #1d4ed8;
    --border: #e2e8f0;
    --danger: #dc2626;
    --success: #16a34a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--bg-header);
    border-bottom: 3px solid var(--primary);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-area {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

.brand-area img {
    height: 40px;
}

.brand-area span {
    color: #ffffff;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 1px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
    align-items: center;
}

nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover, nav a.active {
    color: #ffffff;
}

.btn-auth {
    background-color: var(--primary);
    color: #ffffff !important;
    padding: 8px 16px;
    border-radius: 4px;
}

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

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
    flex: 1;
    width: 100%;
}

.alert {
    padding: 12px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-danger {
    background-color: #fef2f2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #f0fdf4;
    color: var(--success);
    border: 1px solid #bbf7d0;
}

.hero {
    background-color: var(--bg-header);
    color: #ffffff;
    padding: 40px;
    border-radius: 4px;
    margin-bottom: 30px;
}

.hero h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

.hero p {
    color: #94a3b8;
    font-size: 16px;
    max-width: 700px;
}

.section-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 2px solid var(--border);
}

.category-block {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-bottom: 25px;
}

.category-header {
    background-color: var(--bg-sub);
    padding: 12px 20px;
    font-weight: 700;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
}

.channel-row {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border);
}

.channel-row:last-child {
    border-bottom: none;
}

.channel-info {
    flex: 2;
}

.channel-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    display: block;
    margin-bottom: 4px;
}

.channel-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.channel-stats {
    flex: 1;
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
}

.channel-last-post {
    flex: 1.5;
    font-size: 12px;
    color: var(--text-muted);
    text-align: right;
}

.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 4px;
    max-width: 500px;
    margin: 40px auto;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    font-size: 14px;
}

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

.btn-secondary {
    background-color: #64748b;
}

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

.rank-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.forum-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.forum-table th, .forum-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 14px;
}

.forum-table th {
    background-color: var(--bg-sub);
    font-weight: 600;
}

.post-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    margin-bottom: 15px;
}

.post-author {
    width: 200px;
    background: var(--bg-sub);
    padding: 20px;
    border-right: 1px solid var(--border);
    text-align: center;
}

.post-author .username {
    font-weight: 700;
    display: block;
    margin-bottom: 5px;
}

.post-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.post-header {
    font-size: 12px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
    margin-bottom: 15px;
    display: flex;
    justify-content: space-between;
}

.post-body {
    font-size: 15px;
    line-height: 1.6;
}

.post-footer {
    margin-top: 20px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.admin-layout {
    display: flex;
    gap: 20px;
}

.admin-sidebar {
    width: 240px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.admin-sidebar a {
    display: block;
    padding: 12px 20px;
    color: var(--text-dark);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    font-weight: 500;
}

.admin-sidebar a:hover, .admin-sidebar a.active {
    background: var(--bg-sub);
    color: var(--primary);
}

.admin-content {
    flex: 1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 20px;
    border-radius: 4px;
    text-align: center;
}

.stat-card .number {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 5px;
}

footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 20px 0;
    text-align: center;
    margin-top: 40px;
    border-top: 1px solid #1e293b;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-content p {
    margin: 0;
    font-size: 14px;
}

.footer-link {
    color: #3b82f6;
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: #60a5fa;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    .channel-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .channel-stats, .channel-last-post {
        text-align: left;
    }
    .post-box {
        flex-direction: column;
    }
    .post-author {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .admin-layout {
        flex-direction: column;
    }
    .admin-sidebar {
        width: 100%;
    }
}