/* home-motion.css — front page only. Scroll story, day/night sky, card previews.
   Everything here is decoration on top of server-rendered content: with no JS
   the page reads top to bottom with all text visible. */

/* ---------- scroll-driven day -> night ---------- */
/* --n (0..1) is set by home-motion.js while the visitor is in light mode.
   data-sky="night" swaps the token set once the sky is mostly dark. */
:root{--dg-bg:var(--paper)}
:root[data-theme="light"]{--dg-bg:color-mix(in srgb,#0B0B0C calc(var(--n,0) * 100%),#FAFAFA)}
:root[data-sky="night"]{--paper:#0B0B0C;--ink:#F5F5F5;--ink-soft:#C8C8C8;--muted:#8A8A8A;--rule:#1F1F22;--shell:#141416;--accent:#00E676;--accent-ink:#062B14}
:root[data-sky="night"] .site-brand__mark{filter:invert(1)}
body,.site-header,.game-section{background:var(--dg-bg)}
body{transition:color .35s ease}

/* ---------- header progress runner ---------- */
.dg-runner{position:absolute;left:0;bottom:-1px;width:20px;height:18px;color:var(--ink-soft);pointer-events:none;opacity:0;transition:opacity .3s;will-change:transform}
.dg-runner.live{opacity:1}
.dg-runner svg{width:20px;height:18px}
.dg-runner .f2{display:none}
.dg-runner.step .f1{display:none}
.dg-runner.step .f2{display:block}

/* ---------- hero horizon ---------- */
.game-section{position:relative;overflow:hidden;isolation:isolate}
.dg-horizon{position:absolute;left:0;right:0;bottom:0;width:100%;height:70%;max-width:none;pointer-events:none;z-index:-1}
.beat kbd{font-family:var(--font-mono);font-size:.75rem;min-width:30px;padding:3px 8px;border:1px solid var(--rule);border-bottom-width:3px;border-radius:6px;background:var(--shell);color:var(--ink);display:inline-block;text-align:center;transition:transform .08s,border-color .08s,background .08s}

/* ---------- "How to play" scroll story ---------- */
.story{max-width:var(--max-wide);margin:3rem auto 0;padding:0 1.25rem}
.story__intro{max-width:var(--max-prose);margin:0 auto 1rem}
.story__intro h2{font-family:var(--font-mono);font-weight:700;font-size:1.5rem;letter-spacing:-.015em;margin:0;line-height:1.25}
.story__grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:3rem}
.stage{position:sticky;top:calc(var(--dg-hdr,64px) + 24px);height:min(600px,calc(100vh - var(--dg-hdr,64px) - 48px));border:1px solid var(--rule);border-radius:16px;overflow:hidden;background:var(--dg-bg)}
.stage canvas{position:absolute;inset:0;width:100%;height:100%;max-width:none}
.stage__poster{position:absolute;inset:0;display:grid;place-items:center;color:var(--ink-soft)}
.stage__poster svg{width:34%;height:auto}
.stage.is-3d .stage__poster{display:none}
.stage__rail{position:absolute;left:16px;top:16px;display:flex;gap:6px}
.stage__rail i{width:18px;height:4px;border-radius:2px;background:var(--rule);transition:background .3s}
.stage__rail i.on{background:var(--accent)}
.odo{position:absolute;left:50%;bottom:9%;transform:translateX(-50%);display:flex;gap:4px;font:700 clamp(28px,4.4vw,52px)/1 var(--font-mono);color:var(--ink);opacity:0;transition:opacity .4s;pointer-events:none}
.stage[data-beat="4"] .odo{opacity:1}
.odo .col{height:1em;overflow:hidden;width:.68em}
.odo .strip{display:flex;flex-direction:column}
.odo .strip span{height:1em;display:block;text-align:center}
.odo .comma{width:.3em}
.odo .c6{width:0;transition:width .35s ease}
.odo.six .c6{width:.68em}
.beats{list-style:none;margin:0;padding:0}
.beat{min-height:80vh;display:flex;flex-direction:column;justify-content:center;padding:1.5rem 0}
.beat h3{font-family:var(--font-mono);font-weight:700;font-size:clamp(1.2rem,2.2vw,1.45rem);letter-spacing:-.015em;line-height:1.25;margin:0 0 .75rem}
.beat p{color:var(--ink-soft);margin:0 0 1rem;max-width:44ch}
.beat .keys{display:flex;gap:6px}
.dg-motion .beat{opacity:.32;transition:opacity .35s ease}
.dg-motion .beat.is-active{opacity:1}
@media (max-width:860px){
  .story__grid{grid-template-columns:1fr;gap:0}
  .stage{top:var(--dg-hdr,64px);height:44vh;z-index:2;margin-inline:-1.25rem;border-radius:0;border-inline:0}
  .beat{min-height:0;justify-content:flex-start;padding:46vh 0 12vh}
  .beat:first-child{padding-top:3rem}
}

/* ---------- popular games: category chips ---------- */
.dg-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem;list-style:none;margin:0 0 1.5rem;padding:0}
.dg-chips a{display:inline-flex;align-items:center;min-height:44px;padding:0 1.1rem;border:1px solid var(--rule);border-radius:999px;background:var(--shell);text-decoration:none;font-size:.9rem}
.dg-chips a:hover{border-color:var(--accent);color:inherit}

/* ---------- FAQ accordion ---------- */
.faq-list details{border-top:1px solid var(--rule)}
.faq-list details:last-child{border-bottom:1px solid var(--rule)}
.faq-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:1rem;align-items:center;min-height:56px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary h3{font-family:var(--font-sans);font-weight:600;font-size:1.05rem;margin:0}
.faq-list summary::after{content:"";width:10px;height:10px;flex:none;border-right:2px solid var(--ink-soft);border-bottom:2px solid var(--ink-soft);transform:rotate(45deg) translate(-3px,-3px);transition:transform .2s}
.faq-list details[open] summary::after{transform:rotate(225deg)}
.faq-list details p{color:var(--ink-soft);margin:0 0 1rem}

/* ---------- card previews (hover / focus / mid-screen on touch) ---------- */
.game-grid__thumb{position:relative}
.game-grid__thumb canvas.dg-pv{position:absolute;inset:0;width:100%;height:100%;max-width:none;opacity:0;transition:opacity .25s;pointer-events:none}
.game-grid__link.dg-playing canvas.dg-pv{opacity:1}
.dg-pv--red{background:linear-gradient(160deg,#F47C6E,#D7473C)}
.dg-pv--blue{background:linear-gradient(160deg,#69B2F6,#2C76D8)}
.dg-pv--purple{background:linear-gradient(160deg,#C874E2,#8A3AC2)}
.dg-pv--green{background:linear-gradient(160deg,#6CCF8B,#2B9655)}
.dg-pv--orange{background:linear-gradient(160deg,#F6A65D,#DE6A30)}

@media (prefers-reduced-motion:reduce){
  .dg-runner,.dg-horizon{display:none}
}