/* 教學文件中心 - 共用樣式 */

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background-color: #f8fafc;
    --card-background: #ffffff;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按鈕樣式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #16a34a;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    background-color: var(--background-color);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* 表單樣式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: white;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* 卡片樣式 */
.card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
}

.card-body {
    padding: 20px;
}

/* 提示訊息 */
.alert {
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* 表格樣式 */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--background-color);
    font-weight: 600;
}

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

/* 導航列 */
.navbar {
    background-color: white;
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
}

.navbar-nav {
    display: flex;
    gap: 24px;
    list-style: none;
}

.navbar-nav a {
    color: var(--text-muted);
    font-weight: 500;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--primary-color);
    text-decoration: none;
}

/* 頁面標題 */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding: 20px 0;
}

.page-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color);
}

/* 麵包屑 */
.breadcrumb {
    display: flex;
    gap: 8px;
    list-style: none;
    margin-bottom: 16px;
    font-size: 14px;
}

.breadcrumb-item::after {
    content: '/';
    margin-left: 8px;
    color: var(--text-muted);
}

.breadcrumb-item:last-child::after {
    display: none;
}

.breadcrumb-item a {
    color: var(--text-muted);
}

.breadcrumb-item a:hover {
    color: var(--primary-color);
}

/* 工具類別 */
.text-muted {
    color: var(--text-muted);
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }

/* Binder 表格 */
.binder-table td {
    vertical-align: middle;
}

.table-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 12px;
    white-space: nowrap;
    flex-shrink: 0;
}

.badge-public {
    background: #dcfce7;
    color: #166534;
}

.badge-link_only {
    background: #fef3c7;
    color: #92400e;
}

.badge-private {
    background: #f1f5f9;
    color: #475569;
}