/* cairn.fit — Atelier v2 tokens (docs/DESIGN.md), dark by default like the film; light follows the OS. */
@font-face{font-family:"Young Serif";font-weight:400;font-display:swap;src:url("/fonts/young-serif-latin-400.woff2") format("woff2")}
@font-face{font-family:"Hanken Grotesk";font-weight:100 900;font-display:swap;src:url("/fonts/hanken-grotesk-latin-wght.woff2") format("woff2")}
@font-face{font-family:"Martian Mono";font-weight:400;font-display:swap;src:url("/fonts/martian-mono-latin-400.woff2") format("woff2")}

:root{
  --ground:#121619;--surface:#1a2024;--surface2:#21282d;--line:#2e373d;--line-strong:#3d474e;
  --ink:#ece6da;--ink2:#b0b3ad;--muted:#91988f;--dawn:#f0aa62;--dawn-deep:#f6c28e;--on-accent:#12161a;
  --serif:"Young Serif",Georgia,serif;--ui:"Hanken Grotesk",system-ui,sans-serif;--mono:"Martian Mono",ui-monospace,monospace;
  --max:1120px;--gutter:clamp(16px,4vw,40px);color-scheme:dark;
}
@media (prefers-color-scheme:light){:root:not([data-theme="dark"]){
  --ground:#ebe7de;--surface:#f7f4ee;--surface2:#ece7dd;--line:#d5cec0;--line-strong:#c3bbab;
  --ink:#191d20;--ink2:#454b50;--muted:#5d625d;--dawn:#984b0e;--dawn-deep:#843f0a;--on-accent:#fbf8f2;color-scheme:light}}
:root[data-theme="light"]{--ground:#ebe7de;--surface:#f7f4ee;--surface2:#ece7dd;--line:#d5cec0;--line-strong:#c3bbab;
  --ink:#191d20;--ink2:#454b50;--muted:#5d625d;--dawn:#984b0e;--dawn-deep:#843f0a;--on-accent:#fbf8f2;color-scheme:light}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--ink);font:400 17px/1.6 var(--ui);overflow-x:hidden}
a{color:var(--dawn)}a:hover{color:var(--dawn-deep)}
img,video{max-width:100%;display:block}
.mono,.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase}
.eyebrow{color:var(--dawn);margin:0 0 10px}
h1,h2{font-family:var(--serif);font-weight:400;line-height:1.05;margin:0}
em{font-style:normal;color:var(--ink);background:linear-gradient(transparent 62%,color-mix(in srgb,var(--dawn) 28%,transparent) 0)}

.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px var(--gutter);background:color-mix(in srgb,var(--ground) 82%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:400 22px var(--serif)}
.top nav{display:flex;gap:22px;font-size:15px}
.top nav a{color:var(--ink2);text-decoration:none}.top nav a:hover{color:var(--ink)}
.top nav .gh{color:var(--ink);border:1px solid var(--line-strong);border-radius:999px;padding:4px 14px}
@media (max-width:640px){.top nav a:not(.gh){display:none}}

main>section{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.hero{padding-top:clamp(48px,9vw,110px)!important;text-align:center}
.hero h1{font-size:clamp(64px,13vw,168px);letter-spacing:-.02em}
.lede{font:400 clamp(20px,2.6vw,28px)/1.35 var(--serif);color:var(--ink2);max-width:30ch;margin:18px auto 40px}
.film{position:relative;aspect-ratio:16/9;border-radius:18px;overflow:hidden;background:#000;border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.35)}
.film .play{all:unset;cursor:pointer;display:block;width:100%;height:100%;position:relative}
.film .play img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.2,1),filter .4s}
.film .play:hover img{transform:scale(1.02);filter:brightness(.9)}
.film .play:focus-visible{outline:3px solid var(--dawn);outline-offset:-3px}
.disc{position:absolute;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);width:clamp(56px,7vw,84px);height:clamp(56px,7vw,84px);border-radius:50%;display:grid;place-items:center;
  background:var(--dawn);color:#12161a;box-shadow:0 10px 40px rgba(0,0,0,.4);transition:transform .25s}
.film .play:hover .disc{transform:scale(1.08)}
.caption{position:absolute;left:18px;bottom:16px;color:#ece6da;background:rgba(10,13,16,.6);padding:6px 10px;border-radius:6px}
.film iframe,.film video{width:100%;height:100%;border:0}
.ctas{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin:36px 0 10px}
.btn{display:inline-block;padding:13px 24px;border-radius:999px;background:var(--dawn);color:var(--on-accent);text-decoration:none;font-weight:600;transition:transform .15s}
.btn:hover{color:var(--on-accent);transform:translateY(-1px)}.btn:active{transform:scale(.98)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-strong)}
.fine{font-size:13px;color:var(--muted)}

.intro{margin-top:clamp(70px,10vw,130px)!important;max-width:760px!important;font:400 clamp(20px,2.2vw,25px)/1.5 var(--serif);color:var(--ink2)}
.intro p{margin:0 0 18px}

.features{margin-top:clamp(70px,10vw,120px)!important;display:grid;gap:clamp(56px,8vw,100px)}
.features article{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:clamp(28px,6vw,80px);align-items:center}
.features article:nth-child(even){grid-template-columns:minmax(0,1fr) minmax(0,300px)}
.features article:nth-child(even) .phone{order:2}
.features h2{font-size:clamp(30px,4vw,44px);margin-bottom:14px}
.features p{color:var(--ink2);margin:0 0 12px;max-width:52ch}
.note{font-size:14px;color:var(--muted)!important}
.phone{width:100%;max-width:300px;aspect-ratio:9/19.5;object-fit:cover;object-position:top;border-radius:28px;border:1px solid var(--line-strong);background:var(--surface);box-shadow:0 24px 60px rgba(0,0,0,.3);justify-self:center}
@media (max-width:760px){
  .features article,.features article:nth-child(even){grid-template-columns:1fr}
  .features article:nth-child(even) .phone{order:0}
  .phone{max-width:260px}
}

.rules{margin-top:clamp(80px,11vw,140px)!important}
.rules h2,.run h2{font-size:clamp(34px,5vw,56px);margin-bottom:28px}
.rules ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:18px;overflow:hidden}
.rules li{background:var(--surface);padding:22px 24px;color:var(--ink2)}
.rules b{display:block;color:var(--ink);font:400 21px/1.3 var(--serif);margin-bottom:6px}

.tour{margin-top:clamp(80px,11vw,140px)!important}
.tour h2{font-size:clamp(34px,5vw,56px);margin-bottom:12px}.tour>p{color:var(--ink2);margin:0 0 26px}
.run{margin-top:clamp(80px,11vw,140px)!important}
.run>p{color:var(--ink2);max-width:62ch}
.code{position:relative;margin:22px 0}
.code pre{margin:0;overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px 24px;font:400 13.5px/1.7 var(--mono);color:var(--ink)}
.copy{position:absolute;top:10px;right:10px;cursor:pointer;background:var(--surface2);color:var(--ink2);border:1px solid var(--line-strong);border-radius:8px;padding:6px 10px}
.copy:hover{color:var(--ink)}

footer{max-width:var(--max);margin:clamp(90px,12vw,150px) auto 0;padding:40px var(--gutter) 60px;border-top:1px solid var(--line);color:var(--ink2);font-size:15px}
footer p{margin:10px 0 0}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}