/* Site Styles - V5.10 Portal Dark Theme */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border: #30363d;
    --success: #3fb950;
    --warning: #d29922;
    --radius: 8px;
    --shadow: 0 8px 24px rgba(0,0,0,0.4);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo:hover { color: var(--accent); }

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--text-primary); }

.lang-switch {
    display: flex;
    gap: 8px;
}

.lang-btn {
    padding: 6px 12px;
    border-radius: var(--radius);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.lang-btn:hover, .lang-btn.active {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-bottom: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
}

.hero h1 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.btn {
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s;
    border: 1px solid transparent;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent);
}

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

/* Topics */
.topics {
    padding: 60px 0;
    background: var(--bg-primary);
}

.topics h2, .latest h2 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.topic-card {
    display: block;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-decoration: none;
    transition: all 0.2s;
}

.topic-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.topic-icon {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 12px;
    display: inline-block;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius);
}

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

.topic-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Latest Articles */
.latest {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.article-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.article-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.article-item:hover {
    background: var(--bg-tertiary);
}

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

.article-item a {
    text-decoration: none;
}

.article-title {
    display: block;
    color: var(--accent);
    font-weight: 500;
    font-size: 1rem;
    margin-bottom: 4px;
}

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

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

.article-item.placeholder .article-title {
    color: var(--text-secondary);
}

.view-all {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
}

.view-all a {
    color: var(--accent);
    text-decoration: none;
}

.view-all a:hover {
    text-decoration: underline;
}

/* Article Grid */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.article-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all 0.2s;
    overflow: hidden;
}

.article-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.article-card a {
    display: block;
    padding: 20px;
    text-decoration: none;
}

.article-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.article-card h3 a {
    color: var(--accent);
    text-decoration: none;
}

.article-card h3 a:hover {
    color: var(--accent-hover);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.card-category {
    background: var(--accent);
    color: var(--bg-primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
}

.card-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.card-title {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.card-excerpt {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

.lang-tag {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-right: 8px;
}

.loading {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 40px 0;
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-links a:hover { color: var(--text-primary); }

.copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Section Hubs */
.sections {
    padding: 60px 0;
    background: var(--bg-primary);
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.section-hub {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.hub-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.hub-icon {
    font-size: 1.5rem;
}

.hub-header h3 {
    flex: 1;
    font-size: 1rem;
    color: var(--text-primary);
}

.hub-count {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 4px 8px;
    border-radius: 12px;
}

.hub-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.hub-links li {
    padding: 8px 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

.hub-links li:last-child {
    border-bottom: none;
}

.hub-links a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    transition: color 0.2s;
}

.hub-links a:hover {
    color: var(--accent-hover);
}

/* Trending Section */
.trending {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.trending h2, .sections h2 {
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* Article List Enhanced */
.article-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.article-lang {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
}

.article-excerpt {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* Page Header */
.page-header {
    background: var(--bg-secondary);
    padding: 40px 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.page-header h1 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.page-header p {
    color: var(--text-secondary);
}

/* All Articles Section */
.all-articles {
    padding: 60px 0;
    background: var(--bg-primary);
}

.all-articles h2 {
    text-align: center;
    margin-bottom: 40px;
}

/* Article Content Styles */
.article-content {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.article-content h2 {
    color: var(--accent);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.article-content h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 24px 0 12px;
}

.article-content h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 20px 0 10px;
}

.article-content p {
    margin: 16px 0;
    color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
    margin: 16px 0;
    padding-left: 24px;
    color: var(--text-secondary);
}

.article-content li {
    margin: 8px 0;
    line-height: 1.6;
}

.article-content a {
    color: var(--accent);
    text-decoration: none;
}

.article-content a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.article-content code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

.article-content pre {
    background: var(--bg-tertiary);
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 16px 0;
}

.article-content pre code {
    background: none;
    padding: 0;
}

.article-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-muted);
    font-style: italic;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.article-content th,
.article-content td {
    padding: 12px;
    border: 1px solid var(--border);
    text-align: left;
}

.article-content th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 16px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.8rem; }
    .hero { padding: 60px 0; }
    .nav-links { display: none; }
    .hero-cta { flex-direction: column; align-items: center; }
    .topic-grid { grid-template-columns: 1fr; }
    .section-grid { grid-template-columns: 1fr; }
    .card-grid { grid-template-columns: 1fr; }
    .view-all { flex-direction: column; align-items: center; }
}