:root {
  color-scheme: dark;
  --ink: #eef5ff;
  --muted: #a9bad1;
  --space: #07111f;
  --panel: #101e31;
  --line: #29415f;
  --signal: #9fe7d7;
  --warm: #ffcb7d;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: radial-gradient(circle at 70% 0%, #173151, var(--space) 42rem); }
.noscript-note { width: min(70rem, calc(100% - 2rem)); margin: 2rem auto; padding: 1.5rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--panel); }
.noscript-note a { color: var(--signal); }
button, input { font: inherit; }
button, .file-label { color: inherit; border: 1px solid var(--line); background: #12243a; border-radius: 999px; padding: .65rem 1rem; }
button:not(:disabled), .file-label { cursor: pointer; }
button:focus-visible, input:focus-visible, .file-label:focus-within { outline: 3px solid var(--signal); outline-offset: 3px; }
.site-header, main, footer { width: min(70rem, calc(100% - 2rem)); margin-inline: auto; }
.site-header { min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; }
.wordmark { color: var(--ink); text-decoration: none; letter-spacing: .16em; font-weight: 800; }
.language { padding: .4rem .7rem; }
.language[aria-pressed="true"] { border-color: var(--signal); color: var(--signal); }
main { display: grid; gap: 1.5rem; padding-block: 2rem 4rem; }
.hero, .mission, .planet { border: 1px solid var(--line); border-radius: 1.5rem; background: color-mix(in srgb, var(--panel) 92%, transparent); padding: clamp(1.25rem, 4vw, 3rem); }
.eyebrow { color: var(--signal); text-transform: uppercase; letter-spacing: .13em; font-size: .75rem; font-weight: 750; }
h1 { max-width: 13ch; font-size: clamp(2.5rem, 7vw, 5.5rem); line-height: .98; margin: .5rem 0 1rem; }
h2 { font-size: clamp(1.65rem, 4vw, 2.6rem); margin: .4rem 0 1rem; }
.lede { color: var(--muted); max-width: 54ch; font-size: 1.1rem; line-height: 1.6; }
.system-map { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 2.5rem; }
.world { min-height: 10rem; border-radius: 1rem; display: grid; place-items: center; gap: .65rem; }
.world:disabled { opacity: .58; }
.world__orb { width: 4rem; aspect-ratio: 1; border-radius: 50%; display: block; box-shadow: inset -.8rem -.7rem 1.2rem #0007, 0 0 2rem #8ad8ff26; }
.world__orb--numbers { background: linear-gradient(135deg, #ffd789, #b45d7c); }
.world__orb--shape { background: linear-gradient(135deg, #8bdac7, #3277a8); }
.world__orb--measure { background: linear-gradient(135deg, #d0b5ff, #6654ad); }
.world__orb--chance { background: linear-gradient(135deg, #f1a8d8, #713f89); }
.answer-form { margin-block: 2rem; max-width: 34rem; }
.answer-form label { display: block; margin-bottom: .65rem; color: var(--muted); }
.answer-row { display: flex; gap: .75rem; }
.answer-row input { min-width: 0; flex: 1; border: 1px solid var(--line); background: #07111f; color: var(--ink); border-radius: .75rem; padding: .8rem 1rem; }
.feedback { display: block; min-height: 1.5rem; margin-top: .7rem; color: var(--warm); }
.family-anchor { margin: .35rem 0 0; color: var(--muted); font-size: .9rem; font-style: italic; }
.method-tabs, .parts, .portable-state { display: flex; flex-wrap: wrap; gap: .65rem; }
.method-tabs button[aria-pressed="true"], .parts button[aria-pressed="true"] { color: var(--signal); border-color: var(--signal); }
.method { margin-top: 1rem; min-height: 8rem; padding: 1.25rem; border-left: 3px solid var(--signal); background: #091625; line-height: 1.65; }
.planet { display: grid; grid-template-columns: 1fr minmax(15rem, 25rem); align-items: center; gap: 2rem; }
.planet-preview { justify-self: center; position: relative; width: min(18rem, 65vw); aspect-ratio: 1; border-radius: 50%; background: linear-gradient(145deg, #ffd789, #a24771 65%, #542b6e); box-shadow: inset -2.5rem -2rem 4rem #06101faa, 0 0 5rem #ffbf7650; }
.planet-preview.has-ring .planet-preview__ring { position: absolute; inset: 42% -20%; height: 18%; border: .7rem solid #badde0aa; border-radius: 50%; transform: rotate(-14deg); }
.planet-preview.has-moon .planet-preview__moon { position: absolute; width: 18%; aspect-ratio: 1; border-radius: 50%; background: #b7d9e8; right: -10%; top: 15%; box-shadow: inset -.4rem -.35rem .7rem #173151; }
.planet-preview.is-ocean { background: linear-gradient(145deg, #75e0cc, #2779a8 62%, #173151); }
.planet-preview.just-solved .success-orbit { position: absolute; inset: -8%; border: 2px solid var(--signal); border-radius: 50%; opacity: 0; }
.portable-state { margin-top: 1.25rem; }
.file-label input { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; }
.storage-note, footer { color: var(--muted); font-size: .9rem; }
footer { display: flex; justify-content: space-between; gap: 1rem; padding-block: 2rem; border-top: 1px solid var(--line); }
footer a { color: var(--signal); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .75rem 1.25rem; }

@media (max-width: 760px) {
  .system-map { grid-template-columns: repeat(2, 1fr); }
  .planet { grid-template-columns: 1fr; }
  .planet-preview { order: -1; }
  footer { flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: no-preference) {
  .world--active .world__orb { animation: orbit-glow 4s ease-in-out infinite; }
  @keyframes orbit-glow { 50% { transform: translateY(-.25rem); box-shadow: inset -.8rem -.7rem 1.2rem #0007, 0 0 3rem #9fe7d766; } }
  .planet-preview.just-solved .success-orbit { animation: solved-orbit 1.4s ease-out; }
  @keyframes solved-orbit { 0% { opacity: .9; transform: scale(.7); } 100% { opacity: 0; transform: scale(1.35); } }
}