:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, sans-serif;
  background: #080c16;
  color: #edf6ff;
  --muted: #a9bbce;
  --line: #28384d;
  --accent: #85f0de;
}
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 1120px; margin: auto; padding: 24px; }
a { color: var(--accent); text-underline-offset: 4px; }
nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-bottom: 36px; }
nav a { display: inline-flex; align-items: center; min-height: 44px; }
.eyebrow { color: var(--accent); font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; }
h1 { font-size: clamp(2.5rem, 7vw, 5rem); letter-spacing: -.06em; line-height: 1; margin: 16px 0; font-weight: 600; }
.intro { max-width: 620px; color: var(--muted); line-height: 1.6; }
.scene { position: relative; margin-top: 24px; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; background: radial-gradient(ellipse at center, #122136, #070b13 75%); }
canvas { display: block; width: 100%; height: clamp(300px, 58dvh, 600px); touch-action: none; cursor: grab; }
canvas:active { cursor: grabbing; }
.scene-label, .scene-hint { position: absolute; left: 18px; color: var(--muted); font-size: .7rem; pointer-events: none; }
.scene-label { top: 18px; letter-spacing: .16em; }
.scene-hint { bottom: 18px; }
.controls { padding: 22px 0; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
button, select { font: inherit; color: inherit; background: #152235; border: 1px solid var(--line); border-radius: 10px; min-height: 46px; padding: 10px 16px; }
button { cursor: pointer; }
button:disabled { opacity: .5; cursor: wait; }
button.primary { background: var(--accent); color: #062422; font-weight: 600; }
button:hover:not(:disabled), select:hover { border-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.sliders { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 24px; }
label { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; font-size: .9rem; }
output { color: var(--muted); font-variant-numeric: tabular-nums; }
label select, label input { grid-column: 1 / -1; width: 100%; min-width: 0; }
input[type="range"] { accent-color: var(--accent); min-height: 44px; margin: 0; }
#status { color: var(--accent); font-size: .85rem; line-height: 1.5; min-height: 2.5em; }
details { border-top: 1px solid var(--line); padding: 20px 0; max-width: 760px; line-height: 1.65; }
summary { cursor: pointer; min-height: 44px; }
details p, footer { color: var(--muted); }
footer { margin: 22px 0; font-size: .8rem; }
@media (max-width: 600px) {
  main { padding: 16px; }
  nav { margin-bottom: 24px; }
  .sliders { grid-template-columns: 1fr; gap: 16px; }
  .actions button { flex: 1 1 auto; }
}