:root {
    --primary: #1a5f3a;
    --primary-light: #e8f5e9;
    --primary-dark: #124a2a;
    --accent: #d4922a;
    --success: #27ae60;
    --danger: #c0392b;
    --warning: #e67e22;
    --info: #1565c0;
    --bg: #f0f2f5;
    --card: #fff;
    --text: #2c3e50;
    --text-secondary: #5a6c7d;
    --border: #e0e4e8;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg); color: var(--text); line-height: 1.6;
    display: flex; min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 220px; background: linear-gradient(180deg, #1a5f3a 0%, #124a2a 100%);
    color: #fff; flex-shrink: 0; display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
}
.sidebar .logo {
    padding: 20px 18px 16px; border-bottom: 1px solid rgba(255,255,255,0.12);
}
.sidebar .logo h2 { font-size: 1.15em; font-weight: 700; }
.sidebar .logo span { font-size: 0.72em; opacity: 0.65; display: block; margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 8px 0; overflow-y: auto; }
.sidebar-nav a {
    display: flex; align-items: center; gap: 10px; padding: 10px 18px;
    color: rgba(255,255,255,0.8); text-decoration: none; font-size: 0.88em;
    transition: all 0.2s; border-left: 3px solid transparent;
}
.sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.sidebar-nav a.active {
    background: rgba(255,255,255,0.12); color: #fff;
    border-left-color: var(--accent); font-weight: 600;
}
.sidebar-nav .nav-icon { font-size: 1.1em; width: 22px; text-align: center; }
.sidebar-footer {
    padding: 12px 18px; border-top: 1px solid rgba(255,255,255,0.12);
    font-size: 0.72em; opacity: 0.55;
}

/* Main content */
.main-content {
    margin-left: 220px; flex: 1; padding: 20px 28px; min-width: 0;
}

/* Top bar */
.top-bar {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 20px;
}
.top-bar h1 { font-size: 1.4em; font-weight: 700; color: var(--primary); }
.top-bar .time { font-size: 0.82em; color: var(--text-secondary); }

/* Cards */
.card {
    background: var(--card); border-radius: 10px; padding: 20px 24px;
    box-shadow: var(--shadow); border: 1px solid var(--border); margin-bottom: 16px;
}
.card-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 14px;
}
.card-header h3 { font-size: 1.05em; color: var(--primary); }

/* Stats grid */
.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px; margin-bottom: 20px;
}
.stat-card {
    background: var(--card); border-radius: 10px; padding: 18px 20px;
    box-shadow: var(--shadow); border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
}
.stat-card.danger { border-left-color: var(--danger); }
.stat-card.warning { border-left-color: var(--warning); }
.stat-card.info { border-left-color: var(--info); }
.stat-card .stat-label { font-size: 0.78em; color: var(--text-secondary); margin-bottom: 4px; }
.stat-card .stat-value { font-size: 1.8em; font-weight: 700; color: var(--text); }
.stat-card .stat-sub { font-size: 0.75em; color: var(--text-secondary); margin-top: 2px; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.85em; }
.data-table th {
    background: var(--primary-light); color: var(--primary); font-weight: 700;
    padding: 10px 12px; text-align: left; white-space: nowrap;
}
.data-table td { padding: 9px 12px; border-bottom: 1px solid var(--border); }
.data-table tr:hover td { background: #fafafa; }

/* Badges / Tags */
.badge {
    display: inline-block; padding: 2px 10px; border-radius: 12px;
    font-size: 0.78em; font-weight: 600;
}
.badge-success { background: #e8f5e9; color: #1a5f3a; }
.badge-warning { background: #fff3e0; color: #e67e22; }
.badge-danger { background: #ffebee; color: #c0392b; }
.badge-info { background: #e3f2fd; color: #1565c0; }
.badge-default { background: #f5f5f5; color: #616161; }

/* Buttons */
.btn {
    display: inline-block; padding: 7px 16px; border-radius: 6px; font-size: 0.85em;
    font-weight: 600; border: none; cursor: pointer; text-decoration: none;
    transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #219a52; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #a93226; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-outline { background: #fff; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-sm { padding: 4px 12px; font-size: 0.78em; }

/* Flex layouts */
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-gap { display: flex; gap: 10px; flex-wrap: wrap; }

/* Filter bar */
.filter-bar {
    display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
    margin-bottom: 14px;
}
.filter-bar select, .filter-bar input {
    padding: 6px 12px; border: 1px solid var(--border);
    border-radius: 6px; font-size: 0.85em; background: #fff;
}

/* Grid 2-col */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Trace tree */
.trace-section { margin-bottom: 20px; }
.trace-section h4 {
    font-size: 0.9em; color: var(--primary); margin-bottom: 8px;
    padding-bottom: 6px; border-bottom: 1px dashed var(--border);
}
.trace-item {
    display: flex; align-items: center; gap: 8px; padding: 6px 0;
    font-size: 0.85em;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar .logo h2, .sidebar .logo span,
    .sidebar-nav a span:not(.nav-icon), .sidebar-footer { display: none; }
    .sidebar-nav a { justify-content: center; padding: 12px; }
    .main-content { margin-left: 60px; padding: 14px; }
    .grid-2 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}