/* ===============================================
   AI写作小程序管理后台 - 现代化UI样式
   =============================================== */

/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主题色 */
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    
    /* 辅助色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 布局 */
    --sidebar-width: 260px;
    --header-height: 64px;
    --border-radius: 12px;
    --box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    /* 动画 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--gray-50);
    overflow-x: hidden;
}

/* ===== 登录页面 ===== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-form {
    background: white;
    padding: 48px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    width: 100%;
    max-width: 420px;
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-form h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 32px;
    text-align: center;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--gray-700);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* ===== 按钮样式 ===== */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

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

.btn-success:hover:not(:disabled) {
    background: #059669;
    transform: translateY(-1px);
}

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

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-sm {
    padding: 6px 4px;
    font-size: 13px;
}

.btn {
    background: white;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
}

.btn:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

/* ===== 主布局 ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.sidebar {
    width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
}

.sidebar-logo {
    padding: 24px;
    border-bottom: 1px solid var(--gray-200);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
}

.sidebar-logo h1 {
    font-size: 20px;
    font-weight: 700;
    color: white;
    margin: 0;
}

.sidebar-logo p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
    margin: 4px 0 0 0;
}

.sidebar-menu {
    flex: 1;
    padding: 16px 0;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background: var(--gray-50);
    color: var(--primary-color);
}

.menu-item.active {
    background: var(--primary-light);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.menu-item-icon {
    margin-right: 12px;
    font-size: 18px;
}

/* ===== 主内容区 ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

/* ===== 顶部导航 ===== */
.top-header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--gray-50);
    border-radius: 8px;
}

.admin-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.admin-name {
    font-weight: 500;
    color: var(--gray-700);
}

/* ===== 内容区域 ===== */
.content-wrapper {
    flex: 1;
    padding: 5px;
    overflow-y: auto;
}

/* ===== 卡片 ===== */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--gray-50);
}

.card-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.card-body {
    padding: 24px;
}

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.stat-card:nth-child(2) {
    border-left-color: var(--success-color);
}

.stat-card:nth-child(3) {
    border-left-color: var(--warning-color);
}

.stat-card:nth-child(4) {
    border-left-color: var(--info-color);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

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

.table thead {
    background: var(--gray-50);
}

.table th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: 16px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-600);
}

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

.table tbody tr:hover {
    background: var(--gray-50);
}

/* ===== 徽章 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

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

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

/* ===== 分页 ===== */
.pagination-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
}

.pagination-info {
    color: var(--gray-600);
    font-size: 14px;
}

.pagination {
    display: flex;
    gap: 8px;
}

.page-number {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    background: white;
    color: var(--gray-700);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
}

.page-number:hover {
    background: var(--gray-50);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.page-number.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination-ellipsis {
    padding: 8px 12px;
    color: var(--gray-400);
}

/* ===== 模态框 ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.close {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: var(--gray-100);
    border: none;
    font-size: 24px;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

.modal-body {
    padding: 24px;
}

/* ===== 提示信息 ===== */
.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

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

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

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.hidden {
    display: none !important;
}

/* ===== 加载动画 ===== */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading p {
    margin-top: 16px;
    font-size: 14px;
    color: var(--gray-600);
}

/* ===== 搜索和筛选 ===== */
select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-wrapper {
        padding: 16px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 12px 8px;
    }
}

/* ===== 代码样式 ===== */
code {
    background: var(--gray-100);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    color: var(--danger-color);
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 14px;
    color: var(--gray-600);
}