:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --page: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.10);
  --brand: #2a78d6;
  --brand-ink: #ffffff;
  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --page: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --brand: #3987e5;
    --brand-ink: #0b0b0b;
    --status-good: #0ca30c;
    --status-warning: #fab219;
    --status-critical: #e66767;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: var(--page);
}

header.app-header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
}

header.app-header h1 {
  font-size: 18px;
  margin: 0;
}

nav.app-nav {
  display: flex;
  gap: 4px;
}

nav.app-nav button {
  background: none;
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

nav.app-nav button:hover {
  background: var(--gridline);
}

nav.app-nav button.active {
  background: var(--brand);
  color: var(--brand-ink);
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.card h2 {
  font-size: 15px;
  margin: 0 0 12px;
}

.card h3 {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0 0 8px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.stat-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  flex: 1;
}

.stat-tile .value {
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.stat-tile .label {
  font-size: 13px;
  color: var(--text-secondary);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--gridline);
}

th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 13px;
}

td.numeric, th.numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.badge-good { background: color-mix(in srgb, var(--status-good) 18%, transparent); color: var(--status-good); }
.badge-warning { background: color-mix(in srgb, var(--status-warning) 24%, transparent); color: #8a5a00; }
.badge-critical { background: color-mix(in srgb, var(--status-critical) 18%, transparent); color: var(--status-critical); }
.badge-neutral { background: var(--gridline); color: var(--text-secondary); }

@media (prefers-color-scheme: dark) {
  .badge-warning { color: var(--status-warning); }
}

.empty-state, .loading-state, .error-state {
  padding: 24px 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.error-state {
  color: var(--status-critical);
}

.controls-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

label {
  font-size: 13px;
  color: var(--text-secondary);
}

input, select, textarea {
  font-family: inherit;
  font-size: 14px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-1);
  color: var(--text-primary);
}

button.primary {
  background: var(--brand);
  color: var(--brand-ink);
  border: none;
  border-radius: 6px;
  padding: 7px 14px;
  font-size: 14px;
  cursor: pointer;
}

button.secondary {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 14px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-primary);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

form.inline-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gridline);
}

form.inline-form .field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

form.inline-form .field.full-width {
  grid-column: 1 / -1;
}

.form-errors {
  grid-column: 1 / -1;
  color: var(--status-critical);
  font-size: 13px;
}

.tree {
  list-style: none;
  padding-left: 0;
}

.tree ul {
  list-style: none;
  padding-left: 20px;
  border-left: 1px solid var(--gridline);
  margin-left: 6px;
}

.tree li {
  margin: 6px 0;
}

.tree .node-name {
  font-weight: 500;
}

.tree .node-role {
  color: var(--text-secondary);
  font-size: 13px;
}