/* ============================================
   FA个人助理 - 管理后台样式
   ============================================ */

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #4f46e5;
    --primary-light: #818cf8;
    --primary-dark: #3730a3;
    --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;
    --sidebar-width: 220px;
    --header-height: 56px;
    --radius: 8px;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
                 "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    color: var(--gray-700);
    background: var(--gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* Login Page */
.login-page {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-container {
    width: 380px; max-width: 90vw; background: #fff; border-radius: 12px;
    box-shadow: 0 20px 60px rgb(0 0 0 / 0.2); padding: 40px;
}
.login-header { text-align: center; margin-bottom: 30px; }
.login-header h1 { color: var(--gray-800); font-size: 24px; font-weight: 700; }
.login-header p { color: var(--gray-500); margin-top: 4px; }
.login-form .form-group { margin-bottom: 18px; }
.login-footer { text-align: center; margin-top: 16px; color: var(--gray-400); }

/* Admin Layout */
.admin-layout {
    display: flex; min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width); background: var(--gray-800); color: #fff;
    display: flex; flex-direction: column; position: fixed; top: 0; left: 0;
    height: 100vh; z-index: 100; overflow-y: auto;
}
.sidebar-brand {
    padding: 20px 16px; border-bottom: 1px solid var(--gray-700);
}
.sidebar-brand h2 { font-size: 18px; font-weight: 600; }
.sidebar-brand span { font-size: 12px; color: var(--gray-400); }
.sidebar-nav { flex: 1; padding: 12px 8px; }
.nav-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px;
    border-radius: var(--radius); color: var(--gray-300); font-size: 14px;
    transition: all 0.15s; margin-bottom: 2px;
}
.nav-item:hover { background: var(--gray-700); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-icon { font-size: 16px; }
.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--gray-700); }

/* Main Content */
.main-content {
    flex: 1; margin-left: var(--sidebar-width); padding: 0;
}
.content-header {
    padding: 20px 32px; background: #fff; border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}
.content-header h1 { font-size: 20px; color: var(--gray-800); font-weight: 600; }

/* Stats Grid */
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
    padding: 24px 32px;
}
.stats-grid-3 { grid-template-columns: repeat(3, 1fr); }
.stats-grid-5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 1024px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .stats-grid { grid-template-columns: 1fr; } .main-content { margin-left: 0; } }

.stat-card {
    background: #fff; border-radius: var(--radius); padding: 20px;
    box-shadow: var(--shadow); border: 1px solid var(--gray-100);
}
.stat-label { font-size: 13px; color: var(--gray-500); margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--gray-800); }
.stat-value-sm { font-size: 20px; }
.stat-sub { font-size: 12px; color: var(--gray-400); margin-top: 4px; }

/* Panels */
.panel {
    background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
    border: 1px solid var(--gray-100); margin: 0 32px 20px; padding: 20px;
}
.panel-title { font-size: 16px; font-weight: 600; color: var(--gray-800); margin-bottom: 16px; }
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 0 32px 20px; }
@media (max-width: 768px) { .panel-grid { grid-template-columns: 1fr; } }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
    text-align: left; padding: 10px 12px; font-size: 12px; font-weight: 600;
    color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.05em;
    border-bottom: 2px solid var(--gray-200);
}
.data-table td {
    padding: 10px 12px; border-bottom: 1px solid var(--gray-100);
    font-size: 13px;
}
.data-table tr:hover { background: var(--gray-50); }
.data-table.compact th, .data-table.compact td { padding: 6px 10px; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-group label {
    display: block; font-size: 13px; font-weight: 500; color: var(--gray-600);
    margin-bottom: 4px;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group select {
    width: 100%; padding: 8px 12px; border: 1px solid var(--gray-300);
    border-radius: 6px; font-size: 14px; color: var(--gray-700);
    transition: border-color 0.15s; background: #fff;
}
.form-group input:focus, .form-group select:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgb(79 70 229 / 0.1);
}
.form-hint { display: block; font-size: 11px; color: var(--gray-400); margin-top: 2px; }
.label-tag {
    display: inline-block; font-size: 10px; background: var(--warning); color: #fff;
    padding: 1px 6px; border-radius: 3px; margin-left: 6px; vertical-align: middle;
}

/* Config Page */
.config-group {
    background: var(--gray-50); border-radius: var(--radius); padding: 16px 20px;
    margin-bottom: 20px;
}
.config-group-title {
    font-size: 15px; font-weight: 600; color: var(--gray-700);
    margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--gray-200);
}
.config-form { padding: 0 32px 24px; }
.form-actions { padding-top: 8px; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border-radius: 6px; font-size: 14px; font-weight: 500;
    border: 1px solid transparent; cursor: pointer; transition: all 0.15s;
}
.btn:hover { opacity: 0.9; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); border-color: var(--gray-200); }
.btn-outline { background: #fff; color: var(--gray-600); border-color: var(--gray-300); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; padding: 10px; }

/* Alerts */
.alert {
    padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px;
}
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* Tab Navigation */
.tab-nav {
    display: flex; gap: 0; padding: 0 32px; background: #fff;
    border-bottom: 2px solid var(--gray-200);
}
.tab-item {
    padding: 12px 20px; font-size: 14px; font-weight: 500; color: var(--gray-500);
    border-bottom: 2px solid transparent; margin-bottom: -2px;
    transition: all 0.15s;
}
.tab-item:hover { color: var(--gray-700); }
.tab-item.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Period Filter */
.period-filter, .filter-bar {
    padding: 16px 32px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.period-filter label, .filter-bar label { font-size: 13px; color: var(--gray-500); font-weight: 500; }

/* Status Badge */
.status-badge {
    display: inline-block; padding: 2px 8px; border-radius: 4px;
    font-size: 12px; font-weight: 500;
}
.status-pending { background: #fef3c7; color: #92400e; }
.status-reviewing { background: #dbeafe; color: #1e40af; }
.status-resolved { background: #d1fae5; color: #065f46; }
.status-closed { background: #f3f4f6; color: #6b7280; }
.status-approved { background: #d1fae5; color: #065f46; }
.status-rejected { background: #fee2e2; color: #991b1b; }

/* Tag Cloud */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-badge {
    display: inline-flex; align-items: center; gap: 4px;
    background: #eef2ff; color: var(--primary); padding: 4px 10px;
    border-radius: 20px; font-size: 12px; font-weight: 500;
}
.tag-badge em {
    font-style: normal; background: var(--primary); color: #fff;
    border-radius: 10px; padding: 0 6px; font-size: 10px; min-width: 18px; text-align: center;
}
.tag-badge-sm { padding: 2px 6px; font-size: 11px; }

/* Feedback */
.feedback-title {
    max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* Pagination */
.pagination {
    display: flex; gap: 6px; margin-top: 16px; align-items: center;
}

/* Quick Links */
.quick-links {
    padding: 0 32px 24px; display: flex; gap: 12px;
}

/* Home Page */
.home-hero {
    margin: 24px 32px 28px;
    padding: 32px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: #fff;
    box-shadow: 0 4px 20px rgb(102 126 234 / 0.3);
}
.home-hero h2 {
    font-size: 24px; font-weight: 700; margin-bottom: 8px;
}
.home-hero p {
    font-size: 14px; opacity: 0.9; line-height: 1.7;
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    padding: 0 32px 32px;
}
@media (max-width: 640px) {
    .module-grid { grid-template-columns: 1fr; }
}

.module-card {
    display: block;
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 28px 24px;
    box-shadow: var(--shadow);
    transition: all 0.2s ease;
    text-decoration: none;
    color: var(--gray-700);
}
.module-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
    color: var(--gray-700);
}
.module-card .module-icon {
    font-size: 32px; margin-bottom: 12px;
}
.module-card h3 {
    font-size: 17px; font-weight: 600; color: var(--gray-800); margin-bottom: 6px;
}
.module-card p {
    font-size: 13px; color: var(--gray-500); line-height: 1.6;
}

/* Mini Chart */
.mini-chart { max-height: 400px; overflow-y: auto; }

/* Empty State */
.empty-state {
    text-align: center; padding: 40px; color: var(--gray-400); font-size: 14px;
}

/* Code */
code {
    background: var(--gray-100); padding: 1px 4px; border-radius: 3px;
    font-family: "SF Mono", "Fira Code", Monaco, monospace; font-size: 12px;
}

/* Section spacing */
.panel + .panel { margin-top: 20px; }