:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent: #60a5fa;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --sidebar-width: 260px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  display: flex;
  min-height: 100vh;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid #334155;
  flex-shrink: 0;
  min-height: 100vh;
  padding: 1rem;
}
.sidebar h2 { font-size: 1.1rem; margin-bottom: 1.5rem; color: var(--accent); }
.sidebar nav a {
  display: block; padding: 0.6rem 0.8rem; color: var(--text-secondary);
  text-decoration: none; border-radius: 6px; margin-bottom: 0.25rem; font-size: 0.85rem;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: rgba(96, 165, 250, 0.1); color: var(--accent);
}
.main-area { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.header {
  height: 56px; background: var(--bg-secondary); border-bottom: 1px solid #334155;
  display: flex; align-items: center; justify-content: space-between; padding: 0 1.5rem;
}
.header select {
  background: var(--bg-card); color: var(--text-primary); border: 1px solid #334155;
  padding: 0.4rem 0.8rem; border-radius: 6px; font-size: 0.8rem;
}
.content { flex: 1; padding: 1.5rem; overflow-y: auto; }
.page { display: none; }
.page.active { display: block; }
.card {
  background: var(--bg-card); border: 1px solid #334155; border-radius: 8px;
  padding: 1.25rem; margin-bottom: 1rem;
}
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.kpi-card {
  background: var(--bg-card); border: 1px solid #334155; border-radius: 8px;
  padding: 1rem; text-align: center;
}
.kpi-card .value { font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.kpi-card .label { font-size: 0.75rem; color: var(--text-secondary); margin-top: 0.25rem; }
.btn { padding: 0.5rem 1rem; border-radius: 6px; border: none; cursor: pointer; font-size: 0.85rem; font-weight: 500; }
.btn-primary { background: var(--accent); color: white; }
.btn-ghost { background: transparent; border: 1px solid #334155; color: var(--text-secondary); }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 0.75rem; border-bottom: 1px solid #334155; font-size: 0.85rem; }
.badge { display: inline-block; padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.7rem; font-weight: 600; }
.badge-success { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: var(--danger); }
input, select {
  background: var(--bg-primary); border: 1px solid #334155; color: var(--text-primary);
  padding: 0.5rem; border-radius: 6px; font-size: 0.85rem; width: 100%;
}
label { display: block; margin-bottom: 0.25rem; font-size: 0.8rem; color: var(--text-secondary); }