/* 教育课程平台 - 前端样式 */

/* 通用样式 */
.ecp-courses-container,
.ecp-course-detail,
.ecp-vip-panel,
.ecp-user-courses,
.ecp-redeem-card {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 课程列表 */
.ecp-courses-header {
    margin-bottom: 30px;
}

.ecp-course-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.filter-btn {
    padding: 8px 20px;
    border: 1px solid #ddd;
    border-radius: 20px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

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

.ecp-course-card {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.ecp-course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.course-thumbnail {
    position: relative;
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.course-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
}

.badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    color: white;
}

.badge-featured {
    background: #ff6b6b;
}

.badge-vip {
    background: #ffd700;
    color: #333;
}

.course-content {
    padding: 15px;
}

.course-title {
    font-size: 16px;
    margin: 0 0 10px;
}

.course-title a {
    color: #333;
    text-decoration: none;
}

.course-excerpt {
    font-size: 14px;
    color: #666;
    margin: 10px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-meta {
    display: flex;
    gap: 15px;
    font-size: 12px;
    color: #999;
    margin: 15px 0;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}

.course-price .price-current {
    color: #ff6b6b;
    font-size: 20px;
    font-weight: bold;
}

.price-vip,
.price-free {
    color: #28a745;
    font-weight: bold;
}

.btn {
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    cursor: pointer;
    border: none;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-primary {
    background: #007bff;
    color: white;
}

.btn-primary:hover {
    background: #0056b3;
}

.btn-outline {
    background: transparent;
    border: 1px solid #007bff;
    color: #007bff;
}

/* VIP面板 */
.vip-status {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    border-radius: 12px;
    margin-bottom: 30px;
    text-align: center;
}

.vip-plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.vip-plan-card {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    position: relative;
    transition: all 0.3s;
}

.vip-plan-card:hover {
    border-color: #007bff;
    box-shadow: 0 5px 20px rgba(0,123,255,0.2);
}

.plan-price {
    font-size: 48px;
    font-weight: bold;
    color: #007bff;
    margin: 20px 0;
}

.plan-tag {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: #ff6b6b;
    color: white;
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 12px;
}

/* 用户课程 */
.user-course-card {
    display: flex;
    gap: 20px;
    padding: 20px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    margin-bottom: 20px;
}

.user-course-card .course-thumbnail {
    width: 200px;
    flex-shrink: 0;
}

.course-info {
    flex: 1;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    background: #28a745;
    transition: width 0.3s;
}

/* 卡密兑换 */
.redeem-container {
    max-width: 600px;
    margin: 0 auto;
}

.redeem-form {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 8px;
    margin: 30px 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.redeem-result {
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    text-align: center;
}

.redeem-result.success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.redeem-result.error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

/* 分页 */
.ecp-pagination {
    margin: 40px 0;
    text-align: center;
}

.ecp-pagination a,
.ecp-pagination span {
    display: inline-block;
    padding: 8px 12px;
    margin: 0 4px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
}

.ecp-pagination .current {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

/* 响应式 */
@media (max-width: 768px) {
    .ecp-courses-grid {
        grid-template-columns: 1fr;
    }

    .user-course-card {
        flex-direction: column;
    }

    .user-course-card .course-thumbnail {
        width: 100%;
    }

    .vip-plans {
        grid-template-columns: 1fr;
    }
}