/* 任课堂页面样式 */

/* 横幅 */
.classroom-banner {
    margin: 16px;
    padding: 24px 20px;
    border-radius: 16px;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    position: relative;
    box-shadow: var(--shadow-md);
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.banner-subtitle {
    font-size: 13px;
    color: #666;
    margin-bottom: 12px;
}

.banner-btn {
    background: linear-gradient(135deg, #42A5F5, #E3F2FD);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: transform 0.2s;
}

.banner-btn:active {
    transform: scale(0.98);
}

.banner-indicator {
    position: absolute;
    bottom: 16px;
    right: 20px;
    background: rgba(0, 0, 0, 0.2);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
}

/* 分类区域 */
.category-section {
    padding: 0 16px 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.view-all {
    font-size: 13px;
    color: var(--text-light);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.category-card {
    background: white;
    border-radius: 16px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    min-height: 100px;
}

.category-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.category-content {
    flex: 1;
}

.category-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.category-desc {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.6;
}

.category-icon {
    flex-shrink: 0;
    opacity: 0.8;
}

/* 工具区域 */
.tools-section {
    padding: 0 16px 20px;
}

.tools-grid {
    display: grid;
    gap: 12px;
}

.tool-card {
    background: white;
    border-radius: 16px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.tool-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tool-content {
    flex: 1;
}

.tool-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

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

.tool-image {
    flex-shrink: 0;
    margin-left: 16px;
}

.tool-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 课程区域 */
.courses-section {
    padding: 0 16px 20px;
}

.tabs-header {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-light);
    position: relative;
    transition: color 0.2s;
}

.tab-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px 2px 0 0;
}

.course-card {
    background: white;
    border-radius: 16px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
}

.course-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.course-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 500;
    z-index: 1;
}

.free-badge {
    background: linear-gradient(135deg, #26DE81, #20BF6B);
    color: white;
}

.course-content {
    flex: 1;
    padding-right: 12px;
}

.course-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-light);
}

.course-views {
    display: flex;
    align-items: center;
    gap: 4px;
}

.course-thumbnail {
    flex-shrink: 0;
}

/* 响应式调整 */
@media (max-width: 375px) {
    .category-grid {
        gap: 10px;
    }
    
    .category-card {
        padding: 14px;
        min-height: 90px;
    }
    
    .category-title {
        font-size: 14px;
    }
}