/* 后台管理系统样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #4a90e2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --light-gray: #f8f9fa;
    --dark-gray: #343a40;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f5f5f5;
}

/* 管理后台布局 */
.admin-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: var(--dark-gray);
    color: white;
    padding: 20px;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.sidebar h2 {
    margin: 0 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.admin-main {
    flex: 1;
    padding: 20px;
    max-width: calc(100% - 250px);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    color: white;
    background-color: var(--primary-color);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

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

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

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

.btn-warning {
    background-color: var(--warning-color);
    color: #000;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1rem;
}

.form-control {
    display: block;
    width: 100%;
    padding: 8px 12px;
    font-size: 1rem;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    border: 1px solid #ced4da;
    border-radius: 4px;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0,102,204,0.25);
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.table th,
.table td {
    padding: 12px;
    border-bottom: 1px solid #dee2e6;
    text-align: left;
}

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

.table tr:hover {
    background-color: rgba(0,0,0,0.02);
}

/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
    padding: 1.25rem;
}

.card-header {
    padding: 0.75rem 1.25rem;
    margin: -1.25rem -1.25rem 1rem -1.25rem;
    background-color: var(--light-gray);
    border-bottom: 1px solid #dee2e6;
}

/* 警告和提示信息 */
.alert {
    padding: 12px 20px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 4px;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeeba;
}

/* 导航菜单 */
.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu li {
    margin-bottom: 0.5rem;
}

.nav-menu a {
    display: block;
    padding: 8px 16px;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-menu a:hover {
    background-color: rgba(255,255,255,0.1);
}

.nav-menu a.active {
    background-color: var(--primary-color);
}

/* 编辑器容器 */
.editor-container {
    border: 1px solid #ced4da;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.editor-toolbar {
    border-bottom: 1px solid #ced4da;
    padding: 8px;
    background-color: var(--light-gray);
}

.editor-content {
    min-height: 300px;
    padding: 16px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .admin-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        padding: 10px;
    }
    
    .admin-main {
        max-width: 100%;
        padding: 10px;
    }
    
    .table {
        display: block;
        overflow-x: auto;
    }
}