:root {
  --primary: #2563eb;
  --bg: #0b1220;
  --panel: #111a2e;
  --panel2: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: rgba(255,255,255,0.10);
  --danger-bg: rgba(239,68,68,0.14);
  --danger: #fecaca;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: radial-gradient(1200px 600px at 20% 0%, #162447 0%, var(--bg) 50%);
  color: var(--text);
  padding: 20px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
}

header {
  margin-bottom: 16px;
}

h1 {
  margin: 0 0 4px 0;
  font-size: 28px;
}

.subtitle {
  margin: 0 0 12px 0;
  color: var(--muted);
}

.disclaimer {
  background: var(--danger-bg);
  border: 1px solid rgba(239,68,68,0.25);
  color: var(--danger);
  padding: 12px 14px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  line-height: 1.35;
}

.disclaimer .cite, .disclaimer .assumptions {
  margin-top: 6px;
  color: rgba(254,202,202,0.9);
  font-size: 13px;
}

.main {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 16px;
}

.panel {
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel2) 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.controls h2 { margin-top: 0; }

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.slider-group {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.slider-group label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
}

.slider-group .hint {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

input[type="range"] {
  width: 100%;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 14px 0;
}

.constants h3 {
  margin: 12px 0 6px 0;
  font-size: 14px;
  color: rgba(229,231,235,0.9);
}

.constants ul {
  margin: 6px 0 0 16px;
  padding: 0;
  color: var(--muted);
  font-size: 13px;
}

.viz .plot {
  width: 100%;
  height: 420px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.25);
}

.metrics {
  margin: 12px 0 14px 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.metric-box {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: rgba(0,0,0,0.18);
  text-align: center;
}

.metric-label {
  font-size: 12px;
  color: var(--muted);
}

.metric-value {
  font-size: 22px;
  font-weight: 800;
  color: #93c5fd;
  margin-top: 6px;
}

.footnote {
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}

@media (max-width: 1100px) {
  .main { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1fr; }
  .viz .plot { height: 380px; }
}