/* 后台管理 - 现代简约样式
   主色：#1a73e8  背景：#f5f7fa  卡片：#ffffff
*/

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

body {
    font-family: -apple-system, 'Microsoft YaHei', 'Segoe UI', sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

/* ========== 后台顶部导航 ========== */
.admin-header {
    background: #ffffff;
    color: #222;
    padding: 0 30px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid #1a73e8;
}

.admin-header h1 {
    font-size: 18px;
    font-weight: 700;
    color: #1a73e8;
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: #555;
}

.admin-header .user-info a {
    color: #555;
    text-decoration: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    transition: background 0.2s;
}

.admin-header .user-info a:hover {
    background: #f5f5f5;
    color: #222;
}

/* ========== 后台内容区域 ========== */
.admin-container {
    max-width: 1200px;
    margin: 24px auto;
    padding: 0 24px;
}

/* ========== 统计卡片 ========== */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.admin-stat-card {
    background: #fff;
    padding: 20px 24px;
    border-radius: 10px;
    border: 1px solid #e8e8e8;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.admin-stat-card:hover {
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
    border-color: #1a73e8;
}

.admin-stat-card h3 {
    color: #888;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-stat-card .number {
    font-size: 36px;
    font-weight: 700;
    color: #1a73e8;
    line-height: 1;
}

/* ========== 菜单卡片 ========== */
.admin-menu {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.admin-menu-card {
    background: #fff;
    padding: 22px 20px;
    border-radius: 10px;
    border: 1px solid #e8e8e8;
    text-decoration: none;
    color: #333;
    transition: box-shadow 0.2s, border-color 0.2s;
    display: block;
}

.admin-menu-card:hover {
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
    border-color: #1a73e8;
    color: #333;
}

.admin-menu-card h3 {
    color: #1a73e8;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.admin-menu-card p {
    color: #888;
    font-size: 13px;
    line-height: 1.5;
}

/* ========== 数据表格 ========== */
.admin-table-container {
    background: #ffffff;
    padding: 24px 28px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    margin-bottom: 24px;
    overflow-x: auto;
}

.admin-table-container h2 {
    color: #222;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid #eee;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table thead {
    background: #f5f7fa;
}

.admin-table th {
    padding: 12px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: #555;
    border-bottom: 2px solid #e8e8e8;
}

.admin-table tbody tr {
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.15s;
}

.admin-table tbody tr:hover {
    background: #f8fafe;
}

.admin-table td {
    padding: 12px 14px;
    color: #555;
    font-size: 14px;
}

.admin-table .actions {
    display: flex;
    gap: 8px;
}

/* ========== 按钮样式 ========== */
.admin-btn {
    padding: 7px 14px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.2s, box-shadow 0.2s;
    text-decoration: none;
    display: inline-block;
    line-height: 1.4;
}

.admin-btn-primary {
    background: #1a73e8;
    color: white;
}

.admin-btn-primary:hover {
    background: #1557b0;
    box-shadow: 0 2px 6px rgba(26, 115, 232, 0.25);
}

.admin-btn-success {
    background: #2e7d32;
    color: white;
}

.admin-btn-success:hover {
    background: #1b5e20;
}

.admin-btn-warning {
    background: #e65100;
    color: white;
}

.admin-btn-warning:hover {
    background: #bf360c;
}

.admin-btn-danger {
    background: #d93025;
    color: white;
}

.admin-btn-danger:hover {
    background: #a12218;
}

/* ========== 表单样式 ========== */
.admin-form-container {
    background: #ffffff;
    padding: 32px 36px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    max-width: 560px;
    margin: 0 auto 24px;
}

.admin-form-container h2 {
    color: #222;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid #eee;
}

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

.admin-form-group label {
    display: block;
    color: #555;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.admin-form-group input,
.admin-form-group select,
.admin-form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
    background: #fafafa;
}

.admin-form-group input:focus,
.admin-form-group select:focus,
.admin-form-group textarea:focus {
    outline: none;
    border-color: #1a73e8;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.12);
    background: #fff;
}

.admin-form-group .hint {
    color: #888;
    font-size: 12px;
    margin-top: 4px;
    display: block;
}

/* ========== 提示消息 ========== */
.admin-success {
    background: #e8f5e9;
    color: #2e7d32;
    padding: 12px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    border-left: 4px solid #2e7d32;
}

.admin-error {
    background: #fef7f7;
    color: #d93025;
    padding: 12px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    border-left: 4px solid #d93025;
}

/* ========== 后台登录页面 ========== */
.admin-login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f7fa;
}

.admin-login-box {
    background: #ffffff;
    padding: 40px 36px;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 380px;
}

.admin-login-box h1 {
    color: #1a73e8;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
    text-align: center;
}

.admin-login-box .subtitle {
    color: #888;
    text-align: center;
    margin-bottom: 28px;
    font-size: 14px;
}

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

.admin-login-box .form-group label {
    display: block;
    color: #555;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.admin-login-box .form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 15px;
    background: #fafafa;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.admin-login-box .form-group input:focus {
    outline: none;
    border-color: #1a73e8;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.12);
    background: #fff;
}

.admin-login-box button {
    width: 100%;
    padding: 13px;
    background: #1a73e8;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    margin-top: 4px;
}

.admin-login-box button:hover {
    background: #1557b0;
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.admin-login-box .back-link {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
}

.admin-login-box .back-link a {
    color: #1a73e8;
    text-decoration: none;
}

.admin-login-box .back-link a:hover {
    text-decoration: underline;
}

/* ========== 状态标签 ========== */
.admin-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.admin-badge-active {
    background: #e8f5e9;
    color: #2e7d32;
}

.admin-badge-inactive {
    background: #fef7f7;
    color: #d93025;
}

.admin-badge-admin {
    background: #e8f0fe;
    color: #1a73e8;
}

.admin-badge-user {
    background: #e8f5e9;
    color: #2e7d32;
}

/* ========== 分页 ========== */
.admin-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.admin-pagination a {
    padding: 8px 14px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    text-decoration: none;
    color: #555;
    font-size: 14px;
    transition: all 0.2s;
}

.admin-pagination a:hover {
    background: #1a73e8;
    color: white;
    border-color: #1a73e8;
}

.admin-pagination a.active {
    background: #1a73e8;
    color: white;
    border-color: #1a73e8;
}

/* ========== 后台整体布局（左侧栏 + 主内容） ========== */
.admin-body {
    display: flex;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* ========== 左侧导航栏 ========== */
.admin-sidebar {
    width: 220px;
    background: #1e2a3a;
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 200;
    overflow-y: auto;
}

.admin-sidebar .sidebar-brand {
    padding: 20px 20px 16px;
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    letter-spacing: 0.3px;
}

.admin-sidebar .sidebar-nav {
    flex: 1;
    padding: 12px 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.admin-sidebar .sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 22px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.15s, color 0.15s;
    border-left: 3px solid transparent;
}

.admin-sidebar .sidebar-link:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.admin-sidebar .sidebar-link.active {
    background: rgba(26,115,232,0.25);
    color: #fff;
    border-left-color: #1a73e8;
    font-weight: 600;
}

.admin-sidebar .sidebar-bottom {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.admin-sidebar .sidebar-bottom a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 13px;
    display: block;
    padding: 6px 0;
    transition: color 0.15s;
}

.admin-sidebar .sidebar-bottom a:hover {
    color: #fff;
}

/* ========== 主内容区 ========== */
.admin-main {
    flex: 1;
    margin-left: 220px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 后台顶部导航（在主内容区内） */
.admin-main .admin-header {
    background: #ffffff;
    color: #222;
    padding: 0 28px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 2px solid #1a73e8;
}

.admin-main .admin-header h1 {
    font-size: 16px;
    font-weight: 700;
    color: #1a73e8;
}

.admin-main .admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: #666;
}

.admin-main .admin-header .user-info a {
    color: #666;
    text-decoration: none;
    padding: 5px 12px;
    border-radius: 6px;
    transition: background 0.15s;
}

.admin-main .admin-header .user-info a:hover {
    background: #f5f5f5;
}

/* ========== 后台内容容器（在 admin-main 内） ========== */
.admin-main .admin-container {
    padding: 24px 32px;
    flex: 1;
    max-width: 1200px;
}

/* ========== 响应式：小屏收起侧栏 ========== */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 56px;
        overflow: hidden;
    }

    .admin-sidebar .sidebar-brand {
        font-size: 0;
        padding: 16px 0;
        text-align: center;
    }

    .admin-sidebar .sidebar-brand::first-letter {
        font-size: 18px;
    }

    .admin-sidebar .sidebar-link {
        justify-content: center;
        padding: 12px 0;
        font-size: 0;
    }

    .admin-sidebar .sidebar-link::before {
        font-size: 18px;
    }

    .admin-main {
        margin-left: 56px;
    }

    .admin-main .admin-header {
        padding: 0 16px;
    }

    .admin-main .admin-container {
        padding: 16px;
    }
}