/* Chrono AI landing page. Tokens first; no color values outside this block. */
:root{
  --ivory:#F8F6F0;
  --ivory-2:#F0ECE0;
  --ink:#0F0F0E;
  --ink-2:#181817;
  --orange:#E8582A;
  --muted:#6B665A;
  --muted-dark:#A19D91;
  --line:rgba(15,15,14,.10);
  --line-dark:rgba(248,246,240,.12);

  /* tints of the tokens above */
  --white-soft:rgba(255,255,255,.55);   /* light catch on the ivory backdrop */
  --ivory-glass:rgba(248,246,240,.78);
  --ivory-hi:rgba(248,246,240,.16);     /* inner highlight on dark surfaces */
  --ivory-ring:rgba(248,246,240,.22);
  --ink-08:rgba(15,15,14,.08);
  --ink-14:rgba(15,15,14,.14);
  --ink-30:rgba(15,15,14,.30);
  --orange-ring:rgba(232,88,42,.35);

  --serif:"Source Serif 4",Georgia,serif;
  --sans:"Hanken Grotesk",system-ui,sans-serif;
  --mono:"DM Mono",ui-monospace,monospace;

  --spring:cubic-bezier(.32,.72,0,1);
  --ease:cubic-bezier(.16,1,.3,1);
  --nav-h:72px;
  --pin-top:100px;
  --g:1.08;            /* scroll-grow scale */
}

/* Base */
*,*::before,*::after{box-sizing:border-box}
html{overflow-x:clip;-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
body{
  margin:0;color:var(--ink);
  /* soft light behind the hero: ivory tones only */
  background:radial-gradient(1100px 760px at 50% 120px,var(--white-soft),transparent 70%) no-repeat,var(--ivory);
  font:400 16px/1.6 var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-kerning:normal;
}
/* paper grain: physical, not digital */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.035;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
img,svg{display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--ink);color:var(--ivory);padding:10px 16px;border-radius:999px;text-decoration:none;font-weight:500}
.skip:focus{top:12px}

/* Placeholders that need confirmation */
.confirm{outline:1.5px dashed var(--orange);outline-offset:3px;border-radius:4px}

/* Button: ink pill with a nested orange chip */
.btn{
  display:inline-flex;align-items:center;gap:14px;white-space:nowrap;
  background:var(--ink);color:var(--ivory);text-decoration:none;
  font:500 15px/1 var(--sans);letter-spacing:-.01em;
  padding:8px 8px 8px 24px;border-radius:999px;
  box-shadow:inset 0 1px 0 var(--ivory-hi),0 1px 2px var(--ink-14),0 10px 24px -12px var(--ink-30);
  transition:background-color .3s var(--spring),transform .5s var(--spring),box-shadow .5s var(--spring);
}
.btn .chip{
  display:grid;place-items:center;width:32px;height:32px;border-radius:999px;
  background:var(--orange);color:var(--ink);
  transition:transform .5s var(--spring);
}
.btn:hover{background:var(--ink-2);transform:translateY(-1px);box-shadow:inset 0 1px 0 var(--ivory-hi),0 1px 2px var(--ink-14),0 16px 32px -14px var(--ink-30)}
.btn:hover .chip{transform:translateX(3px)}
.btn:active{transform:scale(.98)}
.btn:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:999px}
.btn-sm{padding:6px 6px 6px 22px;gap:12px}
.btn-sm .chip{width:34px;height:34px}
.btn-lg{font-size:17px;padding:10px 10px 10px 32px;gap:18px}
.btn-lg .chip{width:40px;height:40px}

/* Nav: floating island */
.nav-wrap{position:sticky;top:0;z-index:50;padding:16px 24px 0}
.nav{
  max-width:1180px;margin:0 auto;height:var(--nav-h);
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  padding:0 12px 0 28px;border-radius:999px;
  background:var(--ivory-glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 var(--white-soft),0 1px 2px var(--ink-08),0 12px 32px -20px var(--ink-14);
  -webkit-backdrop-filter:blur(20px) saturate(1.4);backdrop-filter:blur(20px) saturate(1.4);
}
.brand{justify-self:start;display:block;border-radius:4px}
.brand img{height:28px;width:auto}
.links{display:flex;gap:6px}
.links a{
  font:500 15px/1 var(--sans);color:var(--muted);text-decoration:none;
  padding:11px 16px;border-radius:999px;
  transition:color .3s var(--spring),background-color .3s var(--spring);
}
.links a:hover{color:var(--ink);background:var(--ink-08)}
.nav .btn{justify-self:end}

/* Hero */
.hero{
  position:relative;max-width:1180px;margin-inline:auto;
  padding:clamp(56px,6vw,96px) 24px 0;
  display:flex;flex-direction:column;align-items:center;isolation:isolate;
}
.col{width:fit-content;max-width:100%;text-align:center}
h1{
  margin:0;font:500 clamp(42px,6.6vw,92px)/1.02 var(--serif);
  letter-spacing:-.035em;font-optical-sizing:auto;padding-bottom:.04em;
}
h1 .ln{display:block;white-space:nowrap}
h1 em{font-style:italic;color:var(--orange);padding-right:.03em;letter-spacing:-.02em}
.deck{
  margin:clamp(18px,2vw,26px) auto 0;max-width:30em;
  font:500 clamp(19px,1.9vw,26px)/1.3 var(--serif);letter-spacing:-.015em;color:var(--ink);
  text-wrap:balance;
}
.sub{
  max-width:33em;margin:18px auto 0;font-size:16px;line-height:1.6;color:var(--muted);
  text-wrap:balance;
}

/* Stage: video pinned under the nav, grows with scroll (CSS only) */
.stage{
  container-type:inline-size;view-timeline:--st block;
  height:170vh;margin-top:clamp(44px,5vw,64px);
}
.pin{position:sticky;top:var(--pin-top)}
.vwrap{
  /* the column width, capped so the frame and the button fit the screen while pinned */
  --vw:min(100cqw, calc((100svh - var(--pin-top) - 200px) * 16 / 9 / var(--g)));
  width:var(--vw);margin-inline:auto;transform-origin:top center;
}
/* double bezel: a machined tray holding the screen */
.bezel{
  padding:8px;border-radius:30px;
  background:var(--ink);
  box-shadow:inset 0 1px 0 var(--ivory-hi),0 0 0 1px var(--ink-14),
             0 2px 4px var(--ink-08),0 30px 60px -24px var(--ink-30),0 60px 120px -60px var(--ink-30);
}
.frame{
  position:relative;aspect-ratio:16/9;border-radius:22px;overflow:hidden;
  background:var(--ink-2);
  box-shadow:inset 0 0 0 1px var(--line-dark);
}
/* faint top light inside the screen */
.frame::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 70% at 50% -10%,var(--ivory-hi),transparent 60%);
}
.mark{
  position:absolute;left:50%;top:50%;translate:-50% -50%;
  height:62%;width:auto;opacity:.035;pointer-events:none;
}
.frame video,.frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0;z-index:2}
.play{
  position:absolute;left:50%;top:50%;translate:-50% -50%;z-index:1;
  width:96px;height:96px;border-radius:999px;border:0;padding:0;cursor:pointer;
  display:grid;place-items:center;background:transparent;
  box-shadow:0 0 0 1px var(--ivory-ring);
  transition:transform .6s var(--spring),box-shadow .6s var(--spring);
}
.play-core{
  display:grid;place-items:center;width:76px;height:76px;border-radius:999px;padding-left:3px;
  background:var(--ivory);color:var(--ink);
  box-shadow:0 10px 30px -8px var(--ink-30);
  transition:transform .6s var(--spring);
}
.play:hover{transform:scale(1.04);box-shadow:0 0 0 10px var(--ivory-hi)}
.play:hover .play-core{transform:scale(1.03)}
.play:focus-visible{outline:2px solid var(--orange);outline-offset:4px;border-radius:999px}
.tag{
  position:absolute;top:18px;right:18px;z-index:1;
  font:500 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted-dark);
}
.meta{
  position:absolute;left:22px;bottom:20px;margin:0;z-index:1;
  display:flex;align-items:center;gap:12px;
  font:500 14px/1 var(--sans);color:var(--ivory);
}
.meta .rule{width:1px;height:12px;background:var(--line-dark)}
.meta .len{font:500 11px/1 var(--mono);letter-spacing:.1em;color:var(--muted-dark)}

.cta{margin-top:36px;display:flex;flex-direction:column;align-items:center;gap:22px}
.ticks{
  list-style:none;margin:0;padding:0;
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px 28px;
  font-size:14px;line-height:1.4;color:var(--muted);
}
.ticks li{display:flex;align-items:center;gap:9px}
.ticks li::before{
  content:"";flex:none;width:9px;height:5px;margin-top:-3px;
  border-left:1.5px solid var(--orange);border-bottom:1.5px solid var(--orange);
  transform:rotate(-45deg);
}

/* Entrance: a quiet staggered rise */
@keyframes rise{from{opacity:0;transform:translateY(18px);filter:blur(6px)}to{opacity:1;transform:none;filter:none}}
.rise{animation:rise 1.1s var(--spring) both}
h1.rise{animation-delay:.05s}
.deck.rise{animation-delay:.18s}
.sub.rise{animation-delay:.28s}
.stage.rise{animation-delay:.4s}

/* Scroll-grow */
@media (min-width:1181px){:root{--g:1.14}}
@keyframes grow{to{transform:scale(var(--g))}}
@keyframes drop{to{transform:translateY(calc((var(--g) - 1) * (var(--vw) * 9 / 16 + 16px)))}}
@supports (animation-timeline:view()){
  .vwrap{animation:grow linear both;animation-timeline:--st;animation-range:cover 17% cover 38%}
  .cta{
    --vw:min(100cqw, calc((100svh - var(--pin-top) - 200px) * 16 / 9 / var(--g)));
    animation:drop linear both;animation-timeline:--st;animation-range:cover 17% cover 38%;
  }
}

@media (max-width:800px){
  :root{--pin-top:88px;--nav-h:60px}
  .nav-wrap{padding:10px 12px 0}
  .nav{grid-template-columns:1fr auto;padding:0 6px 0 18px}
  .links{display:none}
  .brand img{height:24px}
  .btn-sm{font-size:14px;padding:6px 6px 6px 16px;gap:10px}
  .btn-sm .chip{width:30px;height:30px}
  .hero{padding:48px 20px 0}
  .col{width:100%}
  h1{font-size:clamp(38px,11vw,52px);line-height:1.04}
  h1 .ln{white-space:normal;text-wrap:balance}
  .deck{font-size:19px;max-width:20em}
  .sub{font-size:15px}
  .stage{height:150vh;margin-top:36px}
  .vwrap{width:100%}
  .vwrap,.cta{animation:none!important}
  .bezel{padding:5px;border-radius:22px}
  .frame{border-radius:17px}
  .play{width:72px;height:72px}
  .play-core{width:58px;height:58px}
  .tag{top:12px;right:12px}
  .meta{left:14px;bottom:12px;font-size:13px}
  .cta{margin-top:28px}
  .btn-lg{font-size:16px;padding:8px 8px 8px 26px}
  .btn-lg .chip{width:36px;height:36px}
  .ticks{flex-direction:column;align-items:flex-start;gap:10px;text-align:left;max-width:300px}
  .ticks li{align-items:flex-start}
  .ticks li::before{margin-top:5px}
}
@media (max-width:400px){
  .nav .btn-sm{font-size:13px;padding:5px 5px 5px 13px;gap:8px}
  .nav .btn-sm .chip{width:26px;height:26px}
  .brand img{height:21px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rise{animation:none}
  .vwrap,.cta{animation:none!important}
  *{transition-duration:.01ms!important}
}