:root {
  color-scheme: dark;
  --bg: #101216;
  --panel: #1a1d24;
  --text: #f5f6fa;
  --muted: #aab2c0;
  --orange: #ffb45c;
  --cyan: #5bd8ff;
  --green: #8de889;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(circle at 18% 0, rgba(255,180,92,.14), transparent 30rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

.app { padding: clamp(1rem, 3vw, 2rem); }
header { margin-bottom: 1rem; }
header p { color: var(--orange); font-size: .78rem; font-weight: 800; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(2.1rem, 5vw, 4.5rem); line-height: .96; }
h2 { margin: 0 0 1rem; font-size: 1rem; }

.summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: .75rem; margin-bottom: 1rem; }
.summary div, .panel { background: rgba(26,29,36,.94); border: 1px solid rgba(255,255,255,.1); border-radius: 8px; }
.summary div { padding: .9rem; }
.summary span { display: block; color: var(--muted); font-size: .76rem; }
.summary strong { display: block; margin-top: .35rem; }

.layout { display: grid; grid-template-columns: 20rem 1fr; gap: 1rem; }
.panel { padding: 1rem; overflow: hidden; }
label { display: grid; gap: .42rem; margin-bottom: 1rem; color: var(--muted); }
output { color: var(--orange); float: right; }
input, .select { width: 100%; accent-color: var(--orange); }
.select {
  appearance: none;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 6px;
  background: rgba(255,255,255,.04);
  color: var(--text);
  font: inherit;
  padding: .55rem .65rem;
}
.provenance {
  margin: -.2rem 0 1rem;
  padding: .7rem .75rem;
  border: 1px solid rgba(91,216,255,.22);
  border-left: 3px solid var(--cyan);
  border-radius: 6px;
  background: rgba(91,216,255,.055);
}
.provenance__label {
  display: block;
  color: var(--cyan);
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.provenance strong { display: block; margin-top: .25rem; font-size: .84rem; }
.provenance p { margin: .35rem 0 0; color: var(--muted); font-size: .75rem; line-height: 1.45; }
.plots { display: grid; gap: 1rem; }
.diagnostics { display: grid; grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr)); gap: .75rem; }
.diagnostics div {
  padding: .8rem;
  background: rgba(255,255,255,.035);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 8px;
}
.diagnostics span { display: block; color: var(--muted); font-size: .76rem; }
.diagnostics strong { display: block; margin-top: .35rem; }
canvas { display: block; width: 100%; height: auto; background: #0d1117; border-radius: 6px; }

.site-footer {
  padding: 1.2rem clamp(1rem, 3vw, 2rem) 1.6rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,.08);
}

@media (max-width: 920px) {
  .layout, .diagnostics { grid-template-columns: 1fr; }
}