/* 主样式文件 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #17a2b8;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.jumbotron {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.card {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.card-header {
    background-color: var(--secondary-color);
    color: white;
    font-weight: 600;
}

.list-group-item:hover {
    background-color: #f8f9fa;
}

.badge {
    font-weight: 500;
}

.thread-content, .reply-content {
    line-height: 1.6;
    font-size: 1.05rem;
}

.thread-content img, .reply-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

.thread-content pre, .reply-content pre {
    background-color: #f4f4f4;
    padding: 10px;
    border-radius: 4px;
    overflow-x: auto;
}

.thread-content code, .reply-content code {
    background-color: #f4f4f4;
    padding: 2px 4px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

/* 标签样式 */
.btn-tag {
    margin: 2px;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-tag:hover {
    transform: scale(1.05);
}

/* 分页样式 */
.pagination {
    margin-bottom: 0;
}

.page-link {
    color: var(--secondary-color);
    border-color: #dee2e6;
}

.page-link:hover {
    background-color: #e9ecef;
    border-color: #dee2e6;
    color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 表单样式 */
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

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

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .navbar-nav {
        margin-top: 10px;
    }
    
    .card-body .row > div:first-child {
        margin-bottom: 15px;
    }
    
    .thread-content, .reply-content {
        font-size: 1rem;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}