/**
 * Lahochi System - Unified Components CSS
 * 統一組件樣式庫
 * 
 * 命名規範：使用 .u- 前綴表示統一組件
 * 
 * 目錄：
 * 1. 卡片系統 (.u-card)
 * 2. 徽章系統 (.u-badge)
 * 3. 資訊列表 (.u-info)
 * 4. 統計區塊 (.u-stats)
 * 5. 空狀態 (.u-empty)
 * 6. 區塊標題 (.u-section)
 * 7. 表格系統 (.u-table)
 * 8. 詳情項目 (.u-detail)
 */

/* ========================================
   1. 卡片系統 (.u-card)
   ======================================== */

.u-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-5);
    margin-bottom: var(--spacing-4);
    border: 1px solid var(--color-border-light);
}

.u-card--elevated {
    box-shadow: var(--shadow-md);
    border: none;
}

.u-card--hover:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.u-card--bordered {
    border: 1px solid var(--color-border);
    box-shadow: none;
}

/* 卡片頭部 */
.u-card__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding-bottom: var(--spacing-4);
    margin-bottom: var(--spacing-4);
    border-bottom: 2px solid var(--color-border-light);
}

.u-card__header--gradient {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    margin: calc(var(--spacing-5) * -1);
    margin-bottom: var(--spacing-4);
    padding: var(--spacing-4) var(--spacing-5);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-bottom: 2px solid var(--color-border);
}

.u-card__icon {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.u-card__icon--lg {
    font-size: 1.75rem;
}

.u-card__title {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.u-card__title--lg {
    font-size: var(--font-size-2xl);
}

/* 卡片內容 */
.u-card__body {
    color: var(--color-text-secondary);
}

/* 卡片底部 */
.u-card__footer {
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-border-light);
}

/* ========================================
   2. 徽章系統 (.u-badge)
   ======================================== */

/* 基礎徽章 */
.u-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
    line-height: 1.4;
}

/* 放大版徽章 */
.u-badge--lg {
    padding: 0.45rem 0.9rem;
    font-size: 1rem;
}

/* 特大版徽章 */
.u-badge--xl {
    padding: 0.5rem 1rem;
    font-size: 1.0625rem;
}

/* 徽章顏色 - 成功/綠色 */
.u-badge--success {
    background-color: var(--color-success);
    color: white;
}

.u-badge--success-light {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

/* 徽章顏色 - 警告/橙色 */
.u-badge--warning {
    background-color: var(--color-warning);
    color: white;
}

.u-badge--warning-light {
    background-color: #fff3e0;
    color: #e65100;
    border: 1px solid #ffcc80;
}

/* 徽章顏色 - 資訊/藍色 */
.u-badge--info {
    background-color: var(--color-info);
    color: white;
}

.u-badge--info-light {
    background-color: #e3f2fd;
    color: #1565c0;
    border: 1px solid #90caf9;
}

/* 徽章顏色 - 錯誤/紅色 */
.u-badge--error {
    background-color: var(--color-error);
    color: white;
}

/* 徽章顏色 - 主色 */
.u-badge--primary {
    background-color: var(--color-primary);
    color: white;
}

.u-badge--primary-light {
    background-color: #e3f0f7;
    color: var(--color-primary);
    border: 1px solid #90caf9;
}

/* 徽章顏色 - 紫色 */
.u-badge--purple {
    background-color: #9C27B0;
    color: white;
}

/* 徽章顏色 - 灰色/次要 */
.u-badge--secondary {
    background-color: #e2e3e5;
    color: #383d41;
}

.u-badge--purple-light {
    background-color: #f3e5f5;
    color: #7b1fa2;
    border: 1px solid #ce93d8;
}

/* 課程類型專用徽章 */
.u-badge--course-oneday {
    background-color: #e3f2fd;
    color: #1565c0;
    border: 1px solid #90caf9;
}

.u-badge--course-facilitator {
    background-color: #f3e5f5;
    color: #7b1fa2;
    border: 1px solid #ce93d8;
}

.u-badge--course-application {
    background-color: #fff3e0;
    color: #e65100;
    border: 1px solid #ffcc80;
}

.u-badge--course-intro {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

/* ========================================
   3. 資訊列表 (.u-info)
   ======================================== */

/* 資訊列表容器 */
.u-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

/* 單行資訊 - 同列排版 */
.u-info-row {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

/* 標籤 */
.u-info-label {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    min-width: 100px;
    flex-shrink: 0;
}

.u-info-label--lg {
    font-size: var(--font-size-lg);
}

/* 值 */
.u-info-value {
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    flex: 1;
}

.u-info-value--lg {
    font-size: var(--font-size-lg);
}

/* 帶圖示的資訊行 */
.u-info-row--icon {
    align-items: center;
}

.u-info-row--icon .u-info-icon {
    width: 20px;
    text-align: center;
    color: var(--color-primary);
    font-size: 1rem;
    flex-shrink: 0;
}

/* 區塊式資訊（例如自我介紹） */
.u-info-block {
    padding: var(--spacing-3);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
}

.u-info-block--lg {
    font-size: var(--font-size-lg);
}

/* ========================================
   4. 統計區塊 (.u-stats)
   ======================================== */

/* 統計摘要 - 單行版 */
.u-stats-summary {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-5);
    background: linear-gradient(135deg, rgba(44, 95, 141, 0.1) 0%, rgba(44, 95, 141, 0.05) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.u-stats-summary__icon {
    font-size: 1.35rem;
    flex-shrink: 0;
}

.u-stats-summary__text {
    font-size: var(--font-size-lg);
}

.u-stats-summary__number {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
}

/* 統計卡片 - 多數字版 */
.u-stats-card {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: linear-gradient(135deg, rgba(44, 95, 141, 0.08) 0%, rgba(44, 95, 141, 0.03) 100%);
    border-radius: var(--radius-lg);
}

.u-stats-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
    min-width: 80px;
}

.u-stats-item__number {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.u-stats-item__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ========================================
   5. 空狀態 (.u-empty)
   ======================================== */

.u-empty {
    text-align: center;
    padding: var(--spacing-10) var(--spacing-6);
    color: var(--color-text-secondary);
}

.u-empty__icon {
    font-size: 4rem;
    color: var(--color-border);
    margin-bottom: var(--spacing-4);
}

.u-empty__text {
    font-size: var(--font-size-lg);
    margin: 0;
}

.u-empty__text--lg {
    font-size: var(--font-size-xl);
}

.u-empty__action {
    margin-top: var(--spacing-4);
}

/* 小型空狀態 */
.u-empty--sm {
    padding: var(--spacing-6) var(--spacing-4);
}

.u-empty--sm .u-empty__icon {
    font-size: 2.5rem;
}

.u-empty--sm .u-empty__text {
    font-size: var(--font-size-base);
}

/* ========================================
   6. 區塊標題 (.u-section)
   ======================================== */

.u-section-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.u-section-header--border {
    padding-bottom: var(--spacing-3);
    border-bottom: 2px solid var(--color-border);
}

.u-section-header--gradient {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    margin: 0;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 子區塊標題的圖示和文字 */
.u-section-header--gradient .u-section-icon {
    font-size: 1.25rem;
    color: #2C5F8D;
}

.u-section-header--gradient .u-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2C5F8D;
    margin: 0;
}

.u-section-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.u-section-icon--lg {
    font-size: 1.75rem;
}

.u-section-title {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.u-section-title--lg {
    font-size: var(--font-size-2xl);
}

/* ========================================
   7. 表格系統 (.u-table)
   ======================================== */

/* 響應式表格容器 */
.u-table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* 基礎表格 */
.u-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-base);
}

.u-table--lg {
    font-size: 1.0625rem;
}

/* 表頭 */
.u-table thead {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
}

.u-table th {
    padding: var(--spacing-3) var(--spacing-3);
    text-align: left;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

.u-table th i {
    margin-right: var(--spacing-2);
}

/* 表格內容 */
.u-table td {
    padding: var(--spacing-3) var(--spacing-3);
    border-bottom: 1px solid var(--color-border-light);
    vertical-align: middle;
}

.u-table tbody tr {
    transition: background var(--transition-fast);
}

.u-table tbody tr:hover {
    background-color: var(--color-bg-light);
}

.u-table--striped tbody tr:nth-child(even) {
    background-color: var(--color-bg-light);
}

/* 置中對齊 */
.u-table .text-center {
    text-align: center;
}

/* ========================================
   8. 詳情項目 (.u-detail)
   ======================================== */

/* 詳情列表 */
.u-detail-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

/* 詳情項目 - 帶圖示 */
.u-detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.u-detail-item--lg {
    font-size: 1.0625rem;
    gap: var(--spacing-3);
}

.u-detail-item__icon {
    width: 20px;
    text-align: center;
    color: var(--color-primary);
    font-size: 1rem;
    flex-shrink: 0;
}

.u-detail-item__text {
    flex: 1;
}

/* ========================================
   9. 手機版卡片列表 (.u-card-list)
   ======================================== */

.u-card-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.u-card-item {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: var(--shadow-sm);
}

.u-card-item__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-3);
    gap: var(--spacing-2);
}

.u-card-item__badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.u-card-item__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0 0 var(--spacing-3) 0;
}

.u-card-item__title--lg {
    font-size: var(--font-size-xl);
}

/* ========================================
   響應式調整
   ======================================== */

@media (max-width: 768px) {
    /* 卡片調整 */
    .u-card {
        padding: var(--spacing-4);
    }
    
    .u-card__header--gradient {
        margin: calc(var(--spacing-4) * -1);
        margin-bottom: var(--spacing-3);
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .u-card__title {
        font-size: var(--font-size-lg);
    }
    
    .u-card__title--lg {
        font-size: var(--font-size-xl);
    }
    
    .u-card__icon {
        font-size: 1.25rem;
    }
    
    /* 資訊列表調整 */
    .u-info-label {
        min-width: 80px;
        font-size: var(--font-size-sm);
    }
    
    .u-info-label--lg {
        font-size: var(--font-size-base);
    }
    
    .u-info-value {
        font-size: var(--font-size-sm);
    }
    
    .u-info-value--lg {
        font-size: var(--font-size-base);
    }
    
    /* 統計區塊調整 */
    .u-stats-summary {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: var(--font-size-base);
    }
    
    .u-stats-summary__number {
        font-size: var(--font-size-xl);
    }
    
    /* 區塊標題調整 */
    .u-section-title {
        font-size: var(--font-size-lg);
    }
    
    .u-section-title--lg {
        font-size: var(--font-size-xl);
    }
    
    .u-section-icon {
        font-size: 1.25rem;
    }
    
    /* 徽章調整 */
    .u-badge--lg {
        padding: 0.35rem 0.75rem;
        font-size: var(--font-size-sm);
    }
    
    .u-badge--xl {
        padding: 0.4rem 0.85rem;
        font-size: 0.95rem;
    }
    
    /* 詳情項目調整 */
    .u-detail-item--lg {
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    /* 卡片調整 */
    .u-card {
        padding: var(--spacing-3);
    }
    
    /* 資訊行可選擇垂直排列 */
    .u-info-row--stack-mobile {
        flex-direction: column;
        gap: var(--spacing-1);
    }
    
    .u-info-row--stack-mobile .u-info-label {
        min-width: auto;
    }
    
    /* 統計區塊調整 */
    .u-stats-summary {
        gap: var(--spacing-1);
        font-size: var(--font-size-sm);
    }
    
    .u-stats-summary__text {
        font-size: var(--font-size-sm);
    }
    
    .u-stats-summary__number {
        font-size: var(--font-size-lg);
    }
    
    /* 徽章調整 */
    .u-badge--lg {
        padding: 0.3rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .u-badge--xl {
        padding: 0.35rem 0.7rem;
        font-size: 0.875rem;
    }
}

/* ========================================
   桌面版與手機版切換
   ======================================== */

/* 桌面版顯示 */
.u-desktop-only {
    display: block;
}

.u-mobile-only {
    display: none !important;
}

@media (max-width: 768px) {
    .u-desktop-only {
        display: none !important;
    }
    
    .u-mobile-only {
        display: block !important;
    }
    
    /* 特別處理 flex 容器 */
    .u-mobile-only.u-card-list {
        display: flex !important;
    }
}

/* ========================================
   課程管理頁面 (manage_course.php)
   ======================================== */

/* 頁面容器 */
.mc-wrapper {
    padding: 2rem 0;
    min-height: calc(100vh - 250px);
    background: linear-gradient(135deg, #f5f9fc 0%, #e8f4f8 100%);
}

.mc-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 返回按鈕 */
.mc-back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    color: #495057;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
    margin-bottom: 1.5rem;
}

.mc-back-button:hover {
    background: #f8f9fa;
    border-color: var(--color-primary);
    color: var(--color-primary);
    text-decoration: none;
}

/* 課程資訊卡片 */
.mc-course-info-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mc-course-info-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.mc-course-info-header h2 {
    margin: 0;
    color: var(--color-primary);
    font-size: 1.5rem;
}

.mc-course-type-badge {
    padding: 0.35rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.mc-badge-one-day {
    background: #d4edda;
    color: #155724;
}

.mc-badge-facilitator {
    background: #cce5ff;
    color: #004085;
}

.mc-course-info-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.mc-course-info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #495057;
}

.mc-course-info-item i {
    color: var(--color-primary);
    width: 20px;
}

/* 分頁導覽 */
.mc-tabs-nav {
    display: flex;
    gap: 0.5rem;
    background: white;
    border-radius: 12px;
    padding: 0.75rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mc-tab-link {
    flex: 1;
    padding: 0.75rem 1.5rem;
    text-align: center;
    text-decoration: none;
    color: #6c757d;
    background: transparent;
    border-radius: 8px;
    transition: all 0.3s;
    font-weight: 500;
}

.mc-tab-link:hover {
    background: #f8f9fa;
    color: var(--color-primary);
    text-decoration: none;
}

.mc-tab-link.active {
    background: var(--color-primary);
    color: white;
}

.mc-tab-link i {
    margin-right: 0.5rem;
}

/* 內容卡片 */
.mc-content-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mc-content-card h3 {
    margin: 0 0 1.5rem 0;
    color: var(--color-primary);
    font-size: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e9ecef;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .mc-wrapper {
        padding: 1rem 0;
    }
    
    .mc-course-info-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .mc-tabs-nav {
        flex-direction: column;
    }
    
    .mc-tab-link {
        padding: 1rem;
    }
    
    .mc-content-card {
        padding: 1.5rem;
    }
}

/* ========================================
   課程管理 - 登記學員組件 (manage_course_students.php)
   ======================================== */

/* 搜尋區塊 */
.mcs-search-section {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 12px;
}

.mcs-search-box h4,
.mcs-create-box h4 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.mcs-search-form {
    display: flex;
    gap: 0.75rem;
}

.mcs-search-form .form-control {
    flex: 1;
}

.mcs-divider {
    padding: 1rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    text-align: center;
}

.mcs-create-box {
    text-align: center;
}

.mcs-search-result {
    margin-top: 1rem;
}

/* 搜尋結果狀態 */
.mcs-loading,
.mcs-no-result,
.mcs-error {
    text-align: center;
    padding: 1.5rem;
    border-radius: 8px;
    background: white;
}

.mcs-no-result {
    color: var(--color-text-secondary);
}

.mcs-no-result i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.mcs-search-results {
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

.mcs-user-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.mcs-user-result:last-child {
    border-bottom: none;
}

.mcs-user-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.mcs-user-info small {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

.mcs-register-form {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
}

.mcs-register-form h5 {
    margin: 0 0 1rem 0;
    color: var(--color-primary);
}

/* 建立使用者表單 */
.mcs-create-user-form {
    margin-top: 2rem;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 12px;
}

.mcs-create-user-form h4 {
    margin: 0 0 1.5rem 0;
    color: var(--color-primary);
}

/* 學員列表區塊 */
.mcs-attendees-section {
    margin-top: 3rem;
}

.mcs-attendees-section h4 {
    margin: 0 0 1.5rem 0;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.mcs-attendees-section .mcs-badge {
    background: var(--color-primary);
    color: white;
    padding: 0.35rem 0.75rem;
    border-radius: 12px;
    font-size: 0.9rem;
}

/* 空狀態 */
.mcs-empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-secondary);
}

.mcs-empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    opacity: 0.5;
}

/* 學員列表 */
.mcs-attendees-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* 學員卡片 */
.mcs-attendee-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s;
}

.mcs-attendee-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(44, 95, 141, 0.1);
}

.mcs-attendee-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mcs-attendee-name {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.mcs-attendee-name i {
    color: var(--color-primary);
}

.mcs-attendee-details {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.mcs-attendee-details span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.mcs-attendee-status {
    display: flex;
    gap: 0.5rem;
}

.mcs-badge-type {
    background: #17a2b8;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.mcs-badge-mode {
    background: #ffc107;
    color: #000;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.mcs-badge-success {
    background: #28a745;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.mcs-attendee-actions {
    display: flex;
    gap: 0.5rem;
}

.mcs-btn-icon {
    padding: 0.5rem;
    border: none;
    background: #dc3545;
    color: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.mcs-btn-icon:hover {
    background: #c82333;
    transform: scale(1.1);
}

/* 響應式 */
@media (max-width: 768px) {
    .mcs-search-section {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .mcs-divider {
        display: none;
    }
    
    .mcs-search-form {
        flex-direction: column;
    }
    
    .mcs-attendee-card {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .mcs-attendee-details {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .mcs-attendee-actions {
        justify-content: flex-end;
    }
}

/* ========================================
   課程管理 - 開課確認組件 (course_confirm_attendance.php)
   ======================================== */

/* 組件容器 */
.cca-wrapper {
    max-width: 100%;
}

/* 學員確認列表 */
.cca-attendees-section {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.cca-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--color-border);
}

.cca-section-title {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cca-bulk-actions {
    display: flex;
    gap: 0.5rem;
}

.cca-attendee-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cca-attendee-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.cca-attendee-item.confirmed {
    background: #d4edda;
    border-color: #28a745;
}

.cca-attendee-info {
    flex: 1;
    display: grid;
    grid-template-columns: 2fr 2fr 1fr 1fr;
    gap: 1rem;
    align-items: center;
}

.cca-info-col h4 {
    margin: 0 0 0.25rem 0;
    color: var(--color-primary);
    font-size: 1rem;
}

.cca-info-col p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.cca-attendee-actions {
    display: flex;
    gap: 0.5rem;
}

.cca-status-badge {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.85rem;
}

.cca-status-confirmed {
    background: #28a745;
    color: white;
}

/* 完成課程區塊 */
.cca-finish-section {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
}

.cca-finish-section h3 {
    color: #856404;
    margin: 0 0 1rem 0;
}

.cca-finish-section p {
    color: #856404;
    margin-bottom: 1.5rem;
}

.cca-btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* 空狀態 */
.cca-empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-secondary);
    background: white;
    border-radius: var(--radius-lg);
}

.cca-empty-state i {
    font-size: 4rem;
    color: var(--color-border);
    margin-bottom: 1rem;
}

/* 動畫 */
@keyframes ccaSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 響應式 */
@media (max-width: 768px) {
    .cca-attendee-info {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .cca-attendee-item {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .cca-attendee-actions {
        justify-content: stretch;
    }
    
    .cca-attendee-actions button {
        flex: 1;
    }
    
    .cca-section-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .cca-bulk-actions {
        width: 100%;
    }
    
    .cca-bulk-actions button {
        flex: 1;
    }
}


/* ========================================
   Dashboard 分頁統一樣式 v2.0
   以「建立交換場訊息」為標準設計
   ======================================== */

/* 統一卡片背景色 - 灰色底色 */
.dashboard-container .card,
.tabs-content .card,
.create-course,
.course-history-box,
.create-exchange-box,
.system-file-download,
.course-files-viewer,
.profile-info-box,
.profile-edit-box,
.course-plan-box,
.student-list-box,
.exchange-schedule-box,
.course-records-box {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 0;
    overflow: hidden;
}

/* 統一標題區塊樣式 - 藍色漸層背景 */
.u-card__header--gradient,
.u-section-header--gradient,
.component-header,
.card-header,
.create-course .card-header,
.profile-header-centered {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
}

.u-card__header--gradient i,
.u-section-header--gradient i,
.component-header i,
.card-header i,
.create-course .card-header i,
.u-section-icon {
    font-size: 1.5rem;
    color: var(--color-primary, #2C5F8D);
    flex-shrink: 0;
}

.u-card__header--gradient h3,
.u-card__header--gradient h4,
.u-section-header--gradient h3,
.u-section-header--gradient h4,
.component-header h3,
.component-header h4,
.card-header h3,
.card-header h4,
.create-course .card-header h3,
.u-section-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary, #2C5F8D);
}

/* 標題區塊預設靠左 */
.profile-header-centered {
    justify-content: flex-start;
}

/* 表單內容區域 - 統一 padding */
.create-course form,
.create-exchange-box form,
.course-history-box .search-form,
.course-history-box .stats-row,
.course-history-box .course-list,
.system-file-download .file-viewer-container,
.course-files-viewer .file-viewer-container,
.profile-info-list,
.profile-edit-box form,
.course-plan-box .content,
.student-list-box .content,
.exchange-schedule-box .content,
.course-records-box .content {
    padding: 1.25rem;
}

/* ========================================
   開課歷史 - 表單文字更大
   ======================================== */

.course-history-box .search-form {
    padding: 1.25rem;
}

.course-history-box .search-label {
    font-size: 1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.course-history-box .search-input,
.course-history-box .search-form select,
.course-history-box .search-form input {
    font-size: 1rem;
    padding: 0.75rem 1rem;
    min-height: 48px;
}

.course-history-box .search-controls {
    gap: 1rem;
}

.course-history-box .search-field {
    margin-bottom: 0.75rem;
}

/* ========================================
   檔案下載 - 統一卡片樣式
   ======================================== */

.system-file-download,
.course-files-viewer {
    background: #f8f9fa;
}

.system-file-download .component-header,
.course-files-viewer .component-header {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
}

.system-file-download .file-viewer-container,
.course-files-viewer .file-viewer-container {
    background: #f8f9fa;
    padding: 1.25rem;
}

/* ========================================
   基本資訊 - 標題靠左 + 列表樣式
   ======================================== */

.profile-info-box {
    background: #f8f9fa;
}

.profile-info-box .u-section-header--gradient,
.profile-info-box .profile-header-centered {
    justify-content: flex-start;
    text-align: left;
}

.profile-info-list {
    padding: 1.25rem;
}

.profile-info-row {
    padding: 0.875rem 0;
    border-bottom: 1px solid #e9ecef;
}

.profile-info-row:last-child {
    border-bottom: none;
}

.profile-actions {
    padding: 1.25rem;
    padding-top: 0;
}

/* ========================================
   創建課程 - 統一樣式
   ======================================== */

.create-course {
    background: #f8f9fa;
}

.create-course .card-header {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.create-course .card-header i {
    font-size: 1.5rem;
    color: var(--color-primary, #2C5F8D);
}

.create-course .card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary, #2C5F8D);
}

.create-course form {
    padding: 1.25rem;
}

/* ========================================
   建立交換場 - 保持現有風格（標準）
   ======================================== */

.create-exchange-box {
    background: #f8f9fa;
}

.create-exchange-box .u-card__header--gradient {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
}

.create-exchange-box .exchange-form {
    padding: 1.25rem;
}

/* ========================================
   課程紀錄 - 統一樣式
   ======================================== */

.course-records-box {
    background: #f8f9fa;
}

/* ========================================
   手機版響應式調整
   ======================================== */

@media (max-width: 768px) {
    /* 標題區塊調整 */
    .u-card__header--gradient,
    .u-section-header--gradient,
    .component-header,
    .card-header,
    .profile-header-centered {
        padding: 0.875rem 1rem;
    }
    
    .u-card__header--gradient i,
    .u-section-header--gradient i,
    .component-header i,
    .card-header i,
    .u-section-icon {
        font-size: 1.25rem;
    }
    
    .u-card__header--gradient h3,
    .u-card__header--gradient h4,
    .u-section-header--gradient h3,
    .u-section-header--gradient h4,
    .component-header h3,
    .component-header h4,
    .card-header h3,
    .card-header h4,
    .u-section-title {
        font-size: 1.1rem;
    }
    
    /* 表單內容調整 */
    .create-course form,
    .create-exchange-box form,
    .create-exchange-box .exchange-form,
    .course-history-box .search-form,
    .system-file-download .file-viewer-container,
    .course-files-viewer .file-viewer-container,
    .profile-info-list,
    .profile-actions {
        padding: 1rem;
    }
    
    /* 開課歷史表單文字在手機版也保持較大 */
    .course-history-box .search-label {
        font-size: 0.95rem;
    }
    
    .course-history-box .search-input,
    .course-history-box .search-form select,
    .course-history-box .search-form input {
        font-size: 1rem;
        min-height: 44px;
    }
}


/* ========================================
   編輯個人資料 - 標題區按鈕
   ======================================== */

.profile-edit-header {
    justify-content: flex-start;
}

.profile-edit-header .btn-edit-profile {
    margin-left: auto;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    border-radius: 8px;
    background: var(--color-primary, #2C5F8D);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.profile-edit-header .btn-edit-profile:hover {
    background: #1a3d5c;
    transform: translateY(-1px);
}

.profile-edit-section {
    background: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
}

/* ========================================
   課程紀錄 - 統一樣式
   ======================================== */

.course-records-box .component-header,
.student-list-box .component-header,
.course-plan-box .component-header,
.exchange-schedule-box .component-header {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.course-records-box .component-header i,
.student-list-box .component-header i,
.course-plan-box .component-header i,
.exchange-schedule-box .component-header i {
    font-size: 1.5rem;
    color: var(--color-primary, #2C5F8D);
}

.course-records-box .component-header h3,
.student-list-box .component-header h3,
.course-plan-box .component-header h3,
.exchange-schedule-box .component-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary, #2C5F8D);
}


/* ========================================
   空狀態 - 統一樣式
   ======================================== */

.empty-state-box,
.u-empty {
    text-align: center;
    padding: 3rem 1.5rem;
    color: #6c757d;
}

.empty-state-box i,
.u-empty__icon {
    font-size: 3rem;
    color: #adb5bd;
    margin-bottom: 1rem;
    display: block;
}

.empty-state-box p,
.u-empty__text {
    font-size: 1.1rem;
    margin: 0;
    color: #495057;
}

.empty-state-box .help-text,
.u-empty__hint {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 0.5rem;
    display: block;
}

/* ========================================
   開課計畫、學員列表、交換場日程 - 內容區域
   ======================================== */

.course-plan-box .course-list,
.course-plan-box .u-empty,
.student-list-box .student-tabs,
.student-list-box .student-content,
.student-list-box .u-empty,
.exchange-schedule-box .u-table-responsive,
.exchange-schedule-box .u-empty,
.course-records-box .u-table-responsive,
.course-records-box .u-empty {
    padding: 1.25rem;
}

.course-plan-box .u-empty,
.student-list-box .u-empty,
.exchange-schedule-box .u-empty,
.course-records-box .u-empty {
    padding: 2rem 1.25rem;
}


/* ========================================
   覆蓋舊 card-header 樣式
   使用更高特定性確保統一樣式生效
   ======================================== */

/* 創建課程 */
.tabs-content .create-course .u-card__header,
.tabs-content .create-course .u-card__header--gradient,
.dashboard-container .create-course .u-card__header,
.dashboard-container .create-course .u-card__header--gradient {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
    margin-bottom: 0;
    padding-bottom: 1rem;
}

/* 編輯個人資料 */
.tabs-content .profile-edit-section .u-card__header,
.tabs-content .profile-edit-section .u-card__header--gradient,
.dashboard-container .profile-edit-section .u-card__header,
.dashboard-container .profile-edit-section .u-card__header--gradient {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
}

/* 所有分頁的統一卡片標題 */
.tab-panel .u-card__header--gradient,
.tabs-content .u-card__header--gradient {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 1rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    border-radius: 12px 12px 0 0;
    margin: 0;
    margin-bottom: 0;
}

.tab-panel .u-card__header--gradient + form,
.tab-panel .u-card__header--gradient + .search-form,
.tab-panel .u-card__header--gradient + .file-viewer-container,
.tab-panel .u-card__header--gradient + .u-info-list {
    margin-top: 0;
}

/* 修正手機版編輯按鈕樣式 */
@media (max-width: 768px) {
    .profile-edit-header .btn-edit-profile {
        position: absolute;
        right: 1rem;
        top: 50%;
        transform: translateY(-50%);
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }
    
    .profile-edit-header {
        position: relative;
        padding-right: 100px;
    }
}


/* ============================================================================
   從 tab-content-unified.css 合併而來
   ============================================================================ */

/* ========================================
   1. 統一分頁標題樣式（以課程紀錄為基準）
   ======================================== */

.tab-content-header,
.viewer-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 1.5rem;
}

.tab-content-header i,
.viewer-header i {
    font-size: 1.5rem;
    color: var(--color-primary);
    flex-shrink: 0;
}

.tab-content-header h3,
.viewer-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.4;
}

/* ========================================
   2. 統一空狀態樣式（補充）
   ======================================== */

.content-placeholder {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--color-text-secondary);
    background: white;
    border-radius: var(--radius-lg);
}

.content-placeholder i {
    font-size: 4rem;
    color: var(--color-border);
    margin-bottom: 1rem;
    display: block;
}

.content-placeholder p {
    margin: 0.5rem 0;
    font-size: 1.1rem;
}

.empty-state .help-text {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 0.5rem;
}

/* ========================================
   3. 統一搜尋表單樣式
   ======================================== */

.search-form,
.filter-form {
    margin-bottom: 1.5rem;
    background: var(--color-bg-light);
    padding: 1rem;
    border-radius: var(--radius-lg);
}

.search-controls,
.filter-controls {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.search-field,
.filter-field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 140px;
    flex: 1;
}

.search-label,
.filter-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.search-input,
.filter-input {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.search-input:focus,
.filter-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-buttons,
.filter-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}


/* ========================================
   4. 統一表格容器樣式
   ======================================== */

.table-container,
.data-table-container {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 1.5rem;
    border: 1px solid var(--color-border);
}

/* 統一表格樣式 */
.history-table,
.records-table,
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.history-table thead,
.records-table thead,
.data-table thead {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
}

.history-table th,
.records-table th,
.data-table th {
    padding: 0.75rem 0.5rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
    font-size: 0.85rem;
}

.history-table th i,
.records-table th i,
.data-table th i {
    margin-right: 0.4rem;
}

.history-table td,
.records-table td,
.data-table td {
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.history-table tbody tr,
.records-table tbody tr,
.data-table tbody tr {
    transition: background var(--transition-fast);
}

.history-table tbody tr:hover,
.records-table tbody tr:hover,
.data-table tbody tr:hover {
    background: var(--color-bg-light);
}

.history-table tbody tr:last-child td,
.records-table tbody tr:last-child td,
.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* ========================================
   5. 統一按鈕樣式
   ======================================== */

.btn-view,
.btn-action {
    padding: 0.375rem 0.75rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.8rem;
    white-space: nowrap;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.btn-view:hover,
.btn-action:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.btn-view i,
.btn-action i {
    font-size: 0.85rem;
}

/* ========================================
   6. 統一統計/摘要樣式
   ======================================== */

.statistics,
.summary-box,
.records-summary {
    background: rgba(44, 95, 141, 0.1);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.statistics i,
.summary-box i,
.records-summary i {
    font-size: 1.1rem;
}

.statistics strong,
.summary-box strong,
.records-summary strong {
    font-weight: 600;
}


/* ========================================
   7. 統一檔案樹狀結構樣式
   ======================================== */

/* 檔案項目（補充）*/
.folder-item {
    margin-bottom: 1rem;
}

.folder-item-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    border: 2px solid #d0e8f2;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.folder-item-header:hover {
    background: linear-gradient(135deg, #d0e8f2 0%, #e8f4f8 100%);
    box-shadow: 0 2px 8px rgba(44, 95, 141, 0.2);
    transform: translateX(2px);
}

/* ========================================
   8. 統一載入狀態
   ======================================== */

.loading,
.loading-state {
    text-align: center;
    padding: 1rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.loading i,
.loading-state i {
    margin-right: 0.5rem;
}

.no-data,
.no-files,
.no-attendees {
    text-align: center;
    padding: 1rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

.error-message {
    text-align: center;
    padding: 1rem;
    color: var(--color-error);
}

/* ========================================
   9. 統一預覽區域樣式（補充）
   ======================================== */

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 2px solid var(--color-border);
    background: linear-gradient(135deg, #f5f9fc 0%, #e8f4f8 100%);
}

.preview-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.preview-title i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.preview-title h4 {
    margin: 0;
    font-size: 1.1rem;
    word-break: break-word;
    color: var(--color-text-primary);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
    border: none;
    cursor: pointer;
}

.btn-download:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    color: white;
}

/* ========================================
   10. 響應式設計（補充）
   ======================================== */

@media (max-width: 768px) {
    .tab-content-header,
    .viewer-header {
        padding-bottom: 0.75rem;
        margin-bottom: 1rem;
    }

    .tab-content-header i,
    .viewer-header i {
        font-size: 1.25rem;
    }

    .tab-content-header h3,
    .viewer-header h3 {
        font-size: 1.1rem;
    }

    .search-controls,
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-field,
    .filter-field {
        min-width: 100%;
    }

    .search-buttons,
    .filter-buttons {
        justify-content: stretch;
    }

    .search-buttons button,
    .filter-buttons button {
        flex: 1;
    }

    .table-container,
    .data-table-container {
        overflow-x: auto;
    }

    .history-table,
    .records-table,
    .data-table {
        min-width: 600px;
    }

    .statistics,
    .summary-box,
    .records-summary {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.875rem 1rem;
    }
}


/* ============================================================================
   從 file-viewer-unified.css 合併而來
   ============================================================================ */

/* ========================================
   檔案查看器容器
   ======================================== */

.file-viewer-container,
.viewer-container {
    display: flex;
    gap: 1.5rem;
    min-height: 500px;
    position: relative;
}

/* ========================================
   左側邊欄（檔案樹）
   ======================================== */

.file-viewer-sidebar,
.viewer-sidebar {
    flex: 0 0 35%;
    max-width: 400px;
    border-right: 2px solid var(--color-border);
    padding-right: 1.5rem;
    overflow-y: auto;
    max-height: 600px;
}

.file-viewer-sidebar-content {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* ========================================
   大類節點（課程/分類）
   ======================================== */

.tree-node,
.course-node {
    margin-bottom: 0.75rem;
}

/* 大類標題 */
.tree-node-header,
.course-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem;
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    border: 2px solid #d0e8f2;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.tree-node-header:hover,
.course-header:hover {
    background: linear-gradient(135deg, #d0e8f2 0%, #e8f4f8 100%);
    box-shadow: 0 2px 8px rgba(44, 95, 141, 0.2);
    transform: translateX(2px);
}

/* 展開狀態 */
.tree-node.expanded > .tree-node-header,
.course-node .course-header.expanded {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary-dark);
}

.tree-node.expanded > .tree-node-header *,
.course-header.expanded * {
    color: white !important;
}

/* 大類圖示 */
.tree-node-icon,
.course-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
    flex-shrink: 0;
    width: 32px;
    text-align: center;
}

.tree-node.expanded .tree-node-icon,
.course-header.expanded .course-icon {
    color: white;
}

/* 大類資訊 */
.tree-node-info,
.course-info {
    flex: 1;
    min-width: 0;
}

.tree-node-title,
.course-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.course-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.course-meta i {
    margin-right: 0.25rem;
    font-size: 0.75rem;
}

.course-date,
.course-city {
    display: flex;
    align-items: center;
}

/* 展開箭頭 */
.tree-node-expand,
.expand-icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
    color: var(--color-primary);
}

.tree-node.expanded .tree-node-expand,
.course-header.expanded .expand-icon {
    transform: rotate(90deg);
    color: white;
}


/* ========================================
   大類子項目容器
   ======================================== */

.tree-node-children,
.course-files-list {
    display: none;
    padding-left: 1rem;
    padding-top: 0.75rem;
    padding-bottom: 0.5rem;
}

.tree-node.expanded > .tree-node-children,
.course-files-list[style*="display: block"] {
    display: block;
}

/* ========================================
   資料夾項目
   ======================================== */

/* 資料夾標題 */
.folder-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.8rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.folder-header:hover {
    background: var(--color-bg-light);
    border-color: var(--color-primary-light);
}

.folder-item-icon,
.folder-header i {
    color: var(--color-primary);
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

.folder-item-title,
.folder-name {
    flex: 1;
}

.folder-item-count,
.file-count {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: normal;
    background: var(--color-bg-light);
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
}

.folder-item-toggle,
.folder-toggle {
    color: var(--color-primary);
    transition: transform var(--transition-base);
    font-size: 0.85rem;
}

.folder-item.expanded .folder-item-toggle,
.file-folder.expanded .folder-toggle {
    transform: rotate(90deg);
}

/* 資料夾檔案列表 */
.folder-item-files,
.folder-files {
    display: none;
    padding-left: 0.5rem;
    margin-top: 0.5rem;
}

.folder-item.expanded > .folder-item-files,
.file-folder.expanded > .folder-files {
    display: block;
}

/* ========================================
   檔案項目
   ======================================== */

.file-list-item,
.file-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0.6rem;
    margin: 0.25rem 0;
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid #e9ecef;
}

.file-list-item:hover,
.file-item:hover {
    background: var(--color-bg-light);
    border-color: var(--color-border-dark);
    transform: translateX(2px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.file-list-item.active,
.file-item.active {
    background: #e3f2fd;
    border-color: #90caf9;
}

/* 檔案圖示 */
.file-list-item-icon,
.file-icon {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    min-width: 28px;
    text-align: center;
}

.file-list-item.active .file-list-item-icon,
.file-item.active .file-icon {
    color: #1976d2;
}

/* 檔案資訊 */
.file-list-item-info,
.file-details {
    flex: 1;
    min-width: 0;
}

.file-list-item-name,
.file-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 0.2rem;
    line-height: 1.4;
    word-break: break-word;
}

.file-list-item.active .file-list-item-name,
.file-item.active .file-name {
    color: #1976d2;
    font-weight: 600;
}

.file-list-item-meta,
.file-meta {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.file-list-item.active .file-list-item-meta,
.file-item.active .file-meta {
    color: #1976d2;
    opacity: 0.8;
}


/* ========================================
   右側內容區（檔案預覽）
   ======================================== */

.file-viewer-content,
.viewer-content {
    flex: 1;
    min-width: 0;
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

/* 預覽佔位符 */
.file-preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--color-text-secondary);
    padding: 3rem 2rem;
}

.file-preview-placeholder i {
    font-size: 4rem;
    color: var(--color-border);
    margin-bottom: 1rem;
}

.file-preview-placeholder p {
    margin: 0;
    font-size: 1.1rem;
}

/* 預覽包裝器 */
.file-preview-wrapper {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* 預覽標題 */
.file-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 2px solid var(--color-border);
    background: linear-gradient(135deg, #f5f9fc 0%, #e8f4f8 100%);
    gap: 1rem;
    flex-wrap: wrap;
}

.file-preview-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.file-preview-title i {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.file-preview-title h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1.1rem;
    word-break: break-word;
    color: var(--color-text-primary);
}

.file-preview-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

.file-preview-meta span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.file-preview-meta i {
    font-size: 0.8rem;
}

/* 預覽主體 */
.file-preview-body,
.preview-body {
    flex: 1;
    padding: 1.5rem;
    overflow: auto;
}

/* 預覽底部 */
.file-preview-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

/* 媒體預覽 */
.media-preview,
.preview-image,
.preview-video,
.preview-pdf {
    width: 100%;
    max-width: 100%;
    border-radius: var(--radius-lg);
}

.preview-image {
    height: auto;
    display: block;
    margin: 0 auto;
}

.preview-video {
    max-height: 600px;
}

.preview-pdf {
    height: 600px;
    border: none;
}

/* 音訊預覽 */
.audio-preview-container,
.preview-audio-container {
    text-align: center;
    padding: 2rem;
}

.audio-icon {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    display: block;
}

.audio-preview-container h4,
.preview-audio-container h4 {
    margin-bottom: 1rem;
    color: var(--color-primary);
}

/* 不支援預覽 */
.preview-unsupported {
    text-align: center;
    padding: 3rem 2rem;
}

.preview-unsupported i {
    font-size: 5rem;
    color: var(--color-border);
    margin-bottom: 1.5rem;
}

.preview-unsupported h3 {
    margin: 0 0 0.5rem 0;
    color: var(--color-text-primary);
}

.preview-unsupported .file-info {
    color: var(--color-text-secondary);
    margin: 0.5rem 0;
}


/* ========================================
   載入狀態（補充）
   ======================================== */

.loading-files,
.loading-placeholder {
    text-align: center;
    padding: 1rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.loading-files i,
.loading-placeholder i {
    margin-right: 0.5rem;
}

/* ========================================
   樹節點 Meta 資訊
   ======================================== */

.tree-node-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

.tree-node-meta span {
    display: flex;
    align-items: center;
}

.tree-node-meta i {
    margin-right: 0.25rem;
    font-size: 0.7rem;
}

.tree-node.expanded .tree-node-meta {
    color: rgba(255, 255, 255, 0.85);
}

.tree-node.expanded .tree-node-meta i {
    color: rgba(255, 255, 255, 0.85);
}

/* ========================================
   手機版支援
   ======================================== */

.mobile-back-btn {
    display: none;
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 25px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    font-weight: 600;
    z-index: 1000;
}

.mobile-back-btn i {
    margin-right: 0.5rem;
}

/* ========================================
   檔案下載/預覽按鈕
   ======================================== */

.btn-file-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-file-download:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1a3d5c 100%);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: white;
}

.btn-file-download.btn-block {
    display: flex;
    width: 100%;
}

/* 新分頁開啟按鈕 */
.btn-file-preview {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-file-preview:hover {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* PDF 預覽 iframe 样式 */
iframe.preview-pdf {
    width: 100%;
    height: 600px;
    border: none;
    border-radius: var(--radius-md);
    background: #f5f5f5;
}

/* ========================================
   標題區域按鈕組
   ======================================== */

.file-preview-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.btn-header-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

/* 新分頁開啟按鈕 */
.btn-header-action.btn-preview-tab {
    background: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-header-action.btn-preview-tab:hover {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* 下載按鈕 */
.btn-header-action.btn-download {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border: 2px solid transparent;
}

.btn-header-action.btn-download:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1a3d5c 100%);
    box-shadow: var(--shadow-sm);
    color: white;
}


/* ========================================
   檔案查看器響應式設計
   ======================================== */

@media (max-width: 1024px) {
    .file-viewer-sidebar,
    .viewer-sidebar {
        flex: 0 0 35%;
    }
}

@media (max-width: 768px) {
    .file-viewer-container,
    .viewer-container {
        flex-direction: column;
        gap: 0;
    }

    .file-viewer-sidebar,
    .viewer-sidebar {
        flex: 1;
        max-width: 100%;
        border-right: none;
        padding-right: 0;
        max-height: none;
    }

    .file-viewer-content,
    .viewer-content {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 999;
        border-radius: 0;
        display: none;
    }

    .file-viewer-content.mobile-show,
    .viewer-content.mobile-show {
        display: flex;
    }

    .mobile-back-btn {
        display: flex;
        align-items: center;
    }

    .file-viewer-sidebar.mobile-hide,
    .viewer-sidebar.mobile-hide {
        display: none;
    }

    .file-preview-actions {
        width: 100%;
        justify-content: flex-end;
        margin-top: 0.75rem;
    }
    
    .btn-header-action {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .btn-header-action .btn-text {
        display: none;
    }
    
    .btn-header-action i {
        margin: 0;
    }
}

@media (max-width: 480px) {
    .file-preview-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .file-preview-actions {
        width: 100%;
        justify-content: stretch;
    }
    
    .btn-header-action {
        flex: 1;
    }
}


/* ============================================================================
   個人資料頁面子區塊統一樣式
   ============================================================================ */

/* 子區塊卡片 */
.profile-section-card {
    background: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1rem;
    padding: 0;
}

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

/* 子區塊標題 */
.profile-section-card .u-section-header--gradient {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%);
    padding: 0.875rem 1.25rem;
    border-bottom: 2px solid #d0e8f2;
    margin: 0;
}

/* 子區塊內容 */
.profile-section-card .u-info-list {
    padding: 0;
}

.profile-section-card .u-info-row {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid #e9ecef;
}

.profile-section-card .u-info-row:last-child {
    border-bottom: none;
}

.profile-section-card .u-info-block {
    padding: 1rem 1.25rem;
}

/* u-card--bordered 內的子區塊也套用相同風格 */
.u-card--bordered {
    padding: 0;
    overflow: hidden;
}

.u-card--bordered .u-section-header--gradient {
    border-radius: 0;
}


/* ============================================================================
   強制覆蓋：確保子區塊標題顯示漸層背景
   ============================================================================ */

/* 編輯個人資料頁面的子區塊 */
.view-mode-container .u-card .u-section-header--gradient,
.profile-edit-section .u-card .u-section-header--gradient,
#viewMode .u-card .u-section-header--gradient {
    background: linear-gradient(135deg, #e8f4f8 0%, #f5f9fc 100%) !important;
    padding: 0.875rem 1.25rem !important;
    border-bottom: 2px solid #d0e8f2 !important;
    margin: 0 !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.75rem !important;
}

.view-mode-container .u-card .u-section-header--gradient i,
.profile-edit-section .u-card .u-section-header--gradient i,
#viewMode .u-card .u-section-header--gradient i {
    font-size: 1.25rem !important;
    color: #2C5F8D !important;
}

.view-mode-container .u-card .u-section-header--gradient h4,
.profile-edit-section .u-card .u-section-header--gradient h4,
#viewMode .u-card .u-section-header--gradient h4 {
    font-size: 1.1rem !important;
    font-weight: 600 !important;
    color: #2C5F8D !important;
    margin: 0 !important;
}

/* 子區塊卡片背景 */
.view-mode-container .u-card--bordered,
.profile-edit-section .u-card--bordered,
#viewMode .u-card--bordered {
    background: #f8f9fa;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1rem;
    padding: 0;
    border: 1px solid #e9ecef;
}