/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

a {
    text-decoration: none;
    color: #2196F3;
}

/* 登录页面样式 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-title {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 24px;
}

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

.login-form label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.login-form .form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.login-form .form-control:focus {
    outline: none;
    border-color: #667eea;
}

.login-form .btn-block {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
}

/* 后台管理布局 */
.admin-body {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: 250px;
    background: #2c3e50;
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

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

.sidebar-header h2 {
    font-size: 20px;
    margin-bottom: 15px;
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-logout {
    color: #e74c3c;
    font-size: 12px;
    padding: 5px 10px;
    border-radius: 3px;
    transition: background 0.3s;
}

.btn-logout:hover {
    background: rgba(231, 76, 60, 0.2);
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s;
}

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

.nav-item.active {
    background: #3498db;
    color: white;
}

.nav-icon {
    margin-right: 10px;
    font-size: 18px;
}

.nav-text {
    font-size: 14px;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 0;
}

.content-header {
    background: white;
    padding: 20px 30px;
    border-bottom: 1px solid #e0e0e0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.content-header h1 {
    font-size: 24px;
    color: #333;
}

.content-body {
    padding: 30px;
}

/* 模块内容 */
.module-content {
    background: white;
    border-radius: 5px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 工具栏 */
.toolbar {
    margin-bottom: 20px;
}

/* 表格样式 */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.data-table thead {
    background: #f8f9fa;
}

.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.data-table th {
    font-weight: 600;
    color: #555;
    font-size: 13px;
    white-space: nowrap;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 8px 16px;
    font-size: 14px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    background: #e0e0e0;
    color: #333;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary {
    background: #2196F3;
    color: white;
}

.btn-primary:hover {
    background: #1976D2;
}

.btn-warning {
    background: #ff9800;
    color: white;
}

.btn-warning:hover {
    background: #f57c00;
}

.btn-danger {
    background: #f44336;
    color: white;
}

.btn-danger:hover {
    background: #d32f2f;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: #333;
    font-size: 18px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #999;
    padding: 0;
    width: 30px;
    height: 30px;
    line-height: 1;
}

.close-btn:hover {
    color: #333;
}

.modal-form {
    padding: 20px;
}

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

.modal-form label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.modal-form .form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.modal-form .form-control:focus {
    outline: none;
    border-color: #2196F3;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #e0e0e0;
    text-align: right;
}

.modal-footer .btn {
    margin-left: 10px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #2196F3;
}

select.form-control {
    cursor: pointer;
}

/* 警告框样式 */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    border-color: #28a745;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
}

/* 徽章样式 */
.badge {
    display: inline-block;
    padding: 4px 8px;
    font-size: 12px;
    border-radius: 3px;
    font-weight: 500;
}

.badge-success {
    background-color: #28a745;
    color: white;
}

.badge-secondary {
    background-color: #6c757d;
    color: white;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    padding: 20px 0;
}

.pagination .btn {
    margin: 0 5px;
}

.page-info {
    margin: 0 15px;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}