:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --panel: #171b21;
  --panel2: #1d222a;
  --border: #2a303a;
  --text: #e8eaed;
  --muted: #9aa4b2;
  --accent: #3ddc84;
  --accent-dim: #234a35;
  --danger: #ff5e5e;
  --speed-lo: #4361ee;
  --speed-hi: #ffb703;
}

* { box-sizing: border-box; }

a { text-decoration: none; color: inherit; }

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

header {
  padding: 20px 32px 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  color: var(--accent);
  font-size: 1.4rem;
}

h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}

.subtitle {
  color: var(--muted);
  margin: 2px 0 0;
  font-size: 0.85rem;
}

.track-meta {
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  gap: 8px;
  align-items: center;
}

.track-meta[hidden] {
  display: none;
}

.track-meta .dot {
  opacity: 0.5;
}

.account-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.btn-ghost-sm, .btn-primary-sm {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
}

.btn-ghost-sm {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-primary-sm {
  background: var(--accent);
  color: #06210f;
}

.locked-option {
  color: var(--muted);
}

main {
  padding: 20px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: flex-end;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
}

.controls label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text);
  min-width: 150px;
}

.label-text {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.label-text output {
  color: var(--accent);
  font-weight: 600;
}

.controls select {
  background: #0f1216;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.95rem;
}

.slider-field {
  min-width: 190px;
}

input[type="range"] {
  accent-color: var(--accent);
  width: 100%;
}

button#runBtn {
  background: var(--accent);
  color: #06210f;
  border: none;
  border-radius: 8px;
  padding: 11px 20px;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: filter 0.15s ease;
}

button#runBtn:hover:not(:disabled) {
  filter: brightness(1.08);
}

button#runBtn:disabled {
  opacity: 0.75;
  cursor: default;
}

.btn-spinner {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(6, 33, 15, 0.35);
  border-top-color: #06210f;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.status {
  color: var(--muted);
  font-size: 0.85rem;
  min-height: 1.1em;
}

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

.results {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 1fr);
  gap: 20px;
  align-items: start;
}

/* An author stylesheet's `display` wins over the UA default [hidden]{display:none}
   rule even at equal specificity, so this would show by default without this. */
.results[hidden] {
  display: none;
}

@media (max-width: 980px) {
  .results {
    grid-template-columns: 1fr;
  }
}

.map-panel, .chart-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.panel-head h2 {
  margin: 0;
  font-size: 1rem;
  color: var(--muted);
  font-weight: 600;
}

.legend {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--muted);
}

.legend-bar {
  width: 90px;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--speed-lo), var(--speed-hi));
}

canvas {
  background: #0b0d10;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 100%;
  height: auto;
  display: block;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--panel2);
  border-radius: 8px;
  padding: 10px 12px;
}

.stat .label {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat .value {
  font-size: 1.15rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat .value.highlight {
  color: var(--accent);
}

.stat .value.gain {
  color: var(--accent);
}

.chart-card h3 {
  margin: 0 0 2px;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
}

.chart-hint {
  margin: 0 0 8px;
  font-size: 0.72rem;
  color: var(--muted);
  opacity: 0.8;
}