body {
    background-color: #f8f9fa;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
}
.post-card {
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    border-radius: 12px;
}
.post-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}
.topic-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 20px;
}
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    flex-shrink: 0;
}
.comment-card {
    border-left: 3px solid #667eea;
    background: #f8f9fc;
    border-radius: 0 8px 8px 0;
}
.reply-card {
    border-left: 3px solid #e0e0e0;
    background: #ffffff;
    border-radius: 0 8px 8px 0;
    margin-left: 48px;
}
.comment-time {
    font-size: 0.8rem;
    color: #999;
}
.post-content {
    line-height: 1.8;
}
.post-content p {
    margin-bottom: 1rem;
}
.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}
.post-content table th,
.post-content table td {
    border: 1px solid #dee2e6;
    padding: 0.6rem 0.8rem;
    text-align: left;
}
.post-content table thead th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-weight: 600;
    border-color: #5a6fd6;
}
.post-content table tbody tr:nth-child(even) {
    background-color: #f8f9fa;
}
.post-content table tbody tr:hover {
    background-color: #e9ecef;
}
.post-content h3 {
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    color: #333;
}
.post-content h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: #495057;
}
.post-content ul,
.post-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}
.post-content li {
    margin-bottom: 0.3rem;
}
.stats-badge {
    font-size: 0.85rem;
    color: #6c757d;
}
footer {
    margin-top: 3rem;
    padding: 2rem 0 1rem;
    border-top: 1px solid #e9ecef;
    color: #999;
    font-size: 0.85rem;
    background-color: #f1f3f5;
}
.footer-heading {
    font-size: 1rem;
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.75rem;
}
.footer-topic-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-topic-list li {
    margin-bottom: 0.4rem;
}
.footer-topics a {
    color: #6c757d;
    text-decoration: none;
    font-size: 0.85rem;
}
.footer-topics a:hover {
    color: #667eea;
    text-decoration: underline;
}
.footer-topic-list a {
    color: #6c757d;
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s;
}
.footer-topic-list a:hover {
    color: #667eea;
    text-decoration: underline;
}