:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #1d4ed8;
  --primary-soft: #dbeafe;
  --success: #15803d;
  --danger: #b91c1c;
  --shadow: 0 6px 20px rgba(15, 23, 42, 0.05);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px 1fr;
}

.sidebar {
  background: #0f172a;
  color: #cbd5e1;
  padding: 20px 14px;
}

.brand {
  color: #fff;
  font-weight: 700;
  letter-spacing: .2px;
  margin-bottom: 20px;
  padding: 0 10px;
}

.nav-group { margin-bottom: 18px; }
.nav-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #94a3b8;
  margin: 10px 10px 8px;
}

.nav-link {
  display: block;
  color: #cbd5e1;
  text-decoration: none;
  padding: 10px;
  border-radius: 8px;
  margin: 2px 0;
}
.nav-link:hover { background: #1e293b; color: #fff; }

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

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar h1 {
  font-size: 18px;
  margin: 0;
}
.topbar .meta {
  color: var(--muted);
  font-size: 13px;
}

.page {
  padding: 24px 28px 36px;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 16px;
}

.card h2, .card h3 { margin-top: 0; }

.btn {
  background: var(--primary);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { filter: brightness(0.97); }
.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

.input, textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  background: #fff;
}
textarea { min-height: 120px; }

.form-row { margin-bottom: 12px; }
.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 14px;
}

.table {
  width: 100%;
  border-collapse: collapse;
}
.table th, .table td {
  text-align: left;
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  vertical-align: top;
}
.table th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.badge {
  display: inline-block;
  font-size: 12px;
  border-radius: 999px;
  padding: 3px 9px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
}
.badge-success {
  background: #dcfce7;
  border-color: #bbf7d0;
  color: var(--success);
}
.badge-danger {
  background: #fee2e2;
  border-color: #fecaca;
  color: var(--danger);
}

.kv { color: var(--muted); font-size: 14px; }
pre {
  background: #0b1220;
  color: #dbeafe;
  border-radius: 10px;
  padding: 12px;
  overflow: auto;
}

a { color: var(--primary); }

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .grid-2 { grid-template-columns: 1fr; }
}