/* ==========================================
   子項目共用模板專用樣式 (subpage.css)
   ========================================== */

/* 1. 頁面標題與返回鍵 */
.subpage-header {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 24px;
}

.back-link {
    display: inline-block;
    color: var(--text-muted, #666);
    font-size: 0.9rem;
    margin-bottom: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--primary-green, #2c5e3b);
}

/* 2. 課程列表容器 */
.course-catalog {
    max-width: 1000px;
    margin: 0 auto 60px;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* 手風琴外層容器 */
.course-accordion-item {
    background: var(--bg-white, #ffffff);
    border: 1px solid var(--border-color, #e0e0e0);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition, all 0.3s ease);
}

.course-accordion-item:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    border-color: var(--primary-green, #2c5e3b);
}

/* 展開狀態下保持主體邊框高亮 */
.course-accordion-item[open] {
    border-color: var(--primary-green, #2c5e3b);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

/* summary 充當原本的卡片主體 */
.course-accordion-item summary.course-item-card {
    list-style: none;
    cursor: pointer;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
    outline: none;
}

/* 移除預設黑色三角形 */
.course-accordion-item summary::-webkit-details-marker {
    display: none;
}
.course-accordion-item summary::marker {
    display: none;
}

.course-info {
    flex: 1;
}

.course-tag {
    display: inline-block;
    background: var(--accent-gold-light, #fcf8e3);
    color: var(--accent-gold, #c69500);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.course-info h2 {
    font-size: 1.25rem;
    color: var(--primary-green, #2c5e3b);
    margin-bottom: 10px;
}

.course-meta {
    font-size: 0.9rem;
    color: var(--text-muted, #666);
    margin: 4px 0;
}

.course-meta.deadline-text {
    color: #c93b2b;
    font-weight: 500;
}

.course-desc {
    font-size: 0.95rem;
    color: var(--text-body, #333);
    margin-top: 10px;
    line-height: 1.6;
}

/* 展開指示提示文字 */
.expand-hint {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 14px;
    font-size: 0.85rem;
    color: var(--text-muted, #666);
    font-weight: 500;
    transition: color 0.2s ease;
}

.course-accordion-item summary:hover .expand-hint {
    color: var(--primary-green, #2c5e3b);
}

.course-accordion-item[open] .expand-hint {
    color: var(--primary-green, #2c5e3b);
}

/* 3. 按鈕與操作區塊 */
.course-action {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
    min-width: 140px;
}

.price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-green, #2c5e3b);
}

.btn-primary-cta {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-green, #2c5e3b);
    color: #ffffff;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    transition: background 0.2s ease;
}

.btn-primary-cta:hover {
    background-color: #1e4228;
}

.btn-primary-cta.disabled {
    background-color: #b0b0b0;
    color: #ffffff;
    cursor: not-allowed;
    pointer-events: none;
}

/* 4. 手風琴展開後的詳細內容抽屜 */
.course-detail-panel {
    padding: 24px 30px 30px;
    border-top: 1px dashed var(--border-color, #e0e0e0);
    background-color: #fafbfc;
}

.markdown-content {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-body, #333);
}

.markdown-content h3 {
    font-size: 1.1rem;
    color: var(--primary-green, #2c5e3b);
    margin-top: 20px;
    margin-bottom: 10px;
    padding-left: 10px;
    border-left: 3px solid var(--primary-green, #2c5e3b);
}

.markdown-content h3:first-child {
    margin-top: 0;
}

.markdown-content p {
    margin-bottom: 12px;
}

.markdown-content ul, 
.markdown-content ol {
    padding-left: 20px;
    margin-bottom: 12px;
}

/* 講師照片樣式 */
.markdown-content img {
    max-width: 180px;
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 12px 0;
    display: block;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.no-courses {
    text-align: center;
    color: var(--text-muted, #666);
    padding: 40px 0;
    font-size: 1rem;
}

/* 5. 響應式調整 (RWD Media Query) */
@media (max-width: 768px) {
    .course-accordion-item summary.course-item-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        gap: 20px;
    }
    
    .course-action {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        border-top: 1px solid var(--border-color, #e0e0e0);
        padding-top: 15px;
    }

    .course-detail-panel {
        padding: 20px;
    }

    .markdown-content img {
        max-width: 100%;
    }

    /* 將 Intro Grid 在手機版改為單欄排列，避免擠壓 */
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .intro-card {
        padding: 24px 20px;
    }
}