/* 共享样式表 - 用于需要单独引用CSS的页面 */
:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --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;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========== 导航栏 ========== */
.navbar {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    padding: 0 16px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.navbar-brand .icon { font-size: 20px; }

/* 桌面端导航 */
.navbar-nav { display: flex; gap: 4px; align-items: center; list-style:none; }
.navbar-nav a {
    text-decoration: none;
    color: var(--gray-600);
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}
.navbar-nav a:hover, .navbar-nav a.active {
    background: var(--gray-100);
    color: var(--primary);
}
.navbar-user {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--gray-600);
    white-space: nowrap;
}

/* 汉堡菜单按钮（移动端显示） */
.navbar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 4px 8px;
    color: var(--gray-700);
    line-height: 1;
}

/* 移动端导航遮罩 */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 100;
}
.nav-overlay.show { display: block; }

/* 移动端侧滑菜单 */
.nav-drawer {
    position: fixed;
    top: 0;
    left: -280px;
    width: 260px;
    height: 100vh;
    background: #fff;
    z-index: 101;
    box-shadow: 2px 0 12px rgba(0,0,0,0.15);
    transition: left 0.3s ease;
    display: flex;
    flex-direction: column;
    padding: 20px 0;
}
.nav-drawer.show { left: 0; }
.nav-drawer-header {
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--gray-200);
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-drawer a {
    display: block;
    padding: 14px 20px;
    text-decoration: none;
    color: var(--gray-700);
    font-size: 15px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
.nav-drawer a:hover, .nav-drawer a.active {
    background: var(--gray-50);
    color: var(--primary);
    border-left-color: var(--primary);
}
.nav-drawer-user {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid var(--gray-200);
    font-size: 13px;
    color: var(--gray-500);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-outline { background: #fff; border-color: var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }
.btn-sm { padding: 4px 12px; font-size: 12px; }
.btn-block { display: flex; width: 100%; justify-content: center; }

/* ========== 容器 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
}

/* ========== 卡片 ========== */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}
.card-header {
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 15px;
    flex-wrap: wrap;
    gap: 8px;
}
.card-body { padding: 16px; }

/* ========== 表单 ========== */
.form-group { margin-bottom: 14px; }
.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.form-input, .form-textarea, .form-select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    font-family: inherit;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-textarea { resize: vertical; min-height: 80px; }

/* ========== 统计卡片 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 16px 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    border-left: 4px solid var(--primary);
}
.stat-card .stat-label { font-size: 12px; color: var(--gray-500); margin-bottom: 4px; }
.stat-card .stat-value { font-size: 24px; font-weight: 700; color: var(--gray-900); }

/* ========== 表格 ========== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.table th, .table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}
.table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-600);
    white-space: nowrap;
}
.table tr:hover td { background: var(--gray-50); }

/* ========== 状态标签 ========== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger  { background: #fee2e2; color: #991b1b; }
.badge-info    { background: #dbeafe; color: #1e40af; }
.badge-gray    { background: #f3f4f6; color: #4b5563; }

/* ========== 登录页 ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
    padding: 16px;
}
.login-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    padding: 32px;
    width: 100%;
    max-width: 420px;
}
.login-card h1 {
    font-size: 22px;
    text-align: center;
    margin-bottom: 4px;
    color: var(--gray-900);
}
.login-card .subtitle {
    text-align: center;
    color: var(--gray-500);
    margin-bottom: 28px;
    font-size: 14px;
}

/* ========== 提示消息 ========== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }

/* ========== 加载动画 ========== */
.spinner {
    display: inline-block;
    width: 20px; height: 20px;
    border: 2px solid var(--gray-300);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 双列布局 ========== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 16px;
    flex-wrap: wrap;
}
.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: #fff;
    cursor: pointer;
    font-size: 13px;
}
.pagination button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== Toast ========== */
.toast {
    position: fixed;
    top: 16px;
    right: 16px;
    left: 16px;
    max-width: 400px;
    margin-left: auto;
    padding: 12px 20px;
    border-radius: var(--radius);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    z-index: 10000;
    animation: slideIn 0.3s ease;
    box-shadow: var(--shadow-lg);
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ========== 隐藏 ========== */
.hidden { display: none !important; }

/* ========== 搜索表单行 ========== */
.search-row {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
}
.search-row .form-group { margin-bottom: 0; flex: 1; min-width: 180px; }

/* ========== 响应式：平板及以下 ========== */
@media (max-width: 768px) {
    .container { padding: 12px; }

    /* 导航栏移动端适配 */
    .navbar { padding: 0 12px; height: 52px; }
    .navbar-brand { font-size: 16px; }
    .navbar-brand .icon { font-size: 18px; }

    /* 隐藏桌面导航，显示汉堡菜单 */
    .navbar-nav { display: none; }
    .navbar-toggle { display: block; }

    /* 移动端隐藏用户名，只显示退出按钮 */
    .navbar-user span { display: none; }

    /* 双列变单列 */
    .grid-2 { grid-template-columns: 1fr; }

    /* 统计卡片全宽 */
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .stat-card { padding: 12px 14px; }
    .stat-card .stat-value { font-size: 20px; }

    /* 卡片紧凑 */
    .card-header { padding: 12px 14px; font-size: 14px; }
    .card-body { padding: 12px; }

    /* 表格字体缩小 */
    .table { font-size: 12px; }
    .table th, .table td { padding: 8px 10px; }

    /* 按钮全宽 */
    .btn-sm-full { width: 100%; justify-content: center; }

    /* Toast 全宽 */
    .toast { left: 12px; right: 12px; max-width: none; }

    /* 搜索行垂直排列 */
    .search-row { flex-direction: column; }
    .search-row .form-group { min-width: auto; }
}

/* ========== 响应式：小手机 ========== */
@media (max-width: 480px) {
    .container { padding: 8px; }

    .navbar { padding: 0 10px; height: 48px; }
    .navbar-brand { font-size: 15px; }

    /* 统计卡片单列 */
    .stats-grid { grid-template-columns: 1fr; }
    .stat-card .stat-value { font-size: 18px; }

    /* 登录卡片 */
    .login-card { padding: 24px 16px; }
    .login-card h1 { font-size: 20px; }

    .card-header { padding: 10px 12px; font-size: 13px; }
    .card-body { padding: 10px; }

    .btn { padding: 8px 16px; font-size: 13px; }
    .form-input, .form-textarea, .form-select { padding: 8px 12px; font-size: 13px; }
}