:root {
  --bg: #0b1120;
  --surface: #111827;
  --surface-2: #1e293b;
  --border: #334155;
  --primary: #0ea5e9;
  --primary-hover: #0284c7;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #f8fafc;
  --muted: #94a3b8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
}

.brand-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-badge {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: #fff;
}

.nav-list {
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-btn {
  width: 100%;
  text-align: left;
  padding: 9px 12px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.15s;
}

.nav-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav-btn.active {
  background: rgba(14, 165, 233, 0.16);
  color: #38bdf8;
  font-weight: 600;
  border-left: 3px solid var(--primary);
}

.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.content-container {
  padding: 24px;
  max-width: 1440px;
  width: 100%;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.kpi-label {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 6px;
}

.kpi-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 18px;
}

.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 5px;
}

input, select, textarea {
  width: 100%;
  padding: 9px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 13.5px;
}

textarea {
  min-height: 90px;
  resize: vertical;
}

.btn {
  padding: 9px 15px;
  border-radius: 8px;
  border: none;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
}

.btn:hover {
  background: var(--primary-hover);
}

.btn-success { background: var(--success); }
.btn-warning { background: var(--warning); color: #000; }
.btn-danger { background: var(--danger); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
}

.badge-ok { background: rgba(16, 185, 129, 0.18); color: #34d399; }
.badge-warn { background: rgba(245, 158, 11, 0.18); color: #fbbf24; }
.badge-err { background: rgba(239, 68, 68, 0.18); color: #f87171; }
.badge-info { background: rgba(14, 165, 233, 0.18); color: #38bdf8; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
  background: rgba(30, 41, 59, 0.5);
}

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #0284c7;
  color: #fff;
  padding: 12px 18px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
  z-index: 9999;
  display: none;
  max-width: 420px;
  font-size: 13.5px;
}

@media (max-width: 860px) {
  body { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; }
  .nav-list { flex-direction: row; overflow-x: auto; }
  .nav-btn { white-space: nowrap; width: auto; }
}