/* 课程页面容器 */
.courses-container {
    padding-top: 40px;
}

/* 左侧筛选栏 */
.course-filters {
    width: 280px;
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 24px;
    position: sticky;
    top: 88px;
    height: fit-content;
}

.filter-section {
    margin-bottom: 32px;
}

.filter-section:last-child {
    margin-bottom: 0;
}

.filter-section h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-section h3::before {
    content: '';
    width: 3px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 2px;
    display: inline-block;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.filter-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: transparent;
}

.filter-option.active {
    background: rgba(76, 154, 255, 0.1);
}

.option-content {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.filter-option input[type="radio"],
.filter-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
    margin: 0;
}

.filter-option input[type="radio"] {
    border: 2px solid #ddd;
    border-radius: 50%;
}

.filter-option input[type="checkbox"] {
    border: 2px solid #ddd;
    border-radius: 4px;
}

.filter-option span {
    font-size: 14px;
    color: var(--text-secondary);
}

.filter-option.active span {
    color: var(--text-primary);
}

.filter-option .count {
    font-size: 14px;
    color: var(--text-secondary);
    min-width: 24px;
    text-align: right;
}

/* 价格区间选项特殊样式 */
.filter-section:last-child .filter-option span {
    color: #666;
}

/* 全部课程选项特殊样式 */
.filter-option.active[for="all-courses"] {
    background: rgba(76, 154, 255, 0.1);
}

/* 主内容区 */
.courses-main {
    flex: 1;
    min-width: 0;
}

.courses-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.courses-header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.courses-sort select {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    cursor: pointer;
    outline: none;
}

.courses-sort select:hover {
    border-color: var(--primary-color);
}

/* 分页控件 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.pagination a:hover {
    background: var(--hover-bg);
    color: var(--primary-color);
}

.pagination a.active {
    background: var(--primary-color);
    color: white;
}

.pagination .next {
    padding: 0 16px;
}

.pagination .next i {
    margin-left: 8px;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .courses-container {
        gap: 20px;
    }
    
    .course-filters {
        width: 240px;
    }

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

@media (max-width: 768px) {
    .courses-container {
        flex-direction: column;
        padding: 20px;
    }
    
    .course-filters {
        width: 100%;
        position: static;
        margin-bottom: 20px;
        padding: 20px;
    }
    
    .courses-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .courses-sort {
        width: 100%;
    }
    
    .courses-sort select {
        width: 100%;
    }

    .course-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
}