:root{--bg:#f3faf5;--surface:#ffffff;--ink:#183025;--muted:#5d7468;--line:#d7e7dc;--accent:#4f8f6b;--accent-ink:#ffffff;--mark:#dff2e5;
box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.65 Figtree,system-ui,-apple-system,"Segoe UI",sans-serif}
h1,h2,h3{font-family:Newsreader,Georgia,serif;font-weight:600;line-height:1.15;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,6vw,4rem)}h2{font-size:clamp(1.7rem,3.5vw,2.4rem)}h3{font-size:1.25rem}
p{margin:0 0 1em;max-width:68ch}a{color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
.wrap{max-width:1040px;margin:0 auto;padding:0 1.25rem}
header{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap;padding-top:.7rem;padding-bottom:.7rem}
.brand{display:flex;align-items:center;gap:.6rem;font:600 1.3rem Newsreader,Georgia,serif;color:var(--ink);text-decoration:none}
.brand svg{width:34px;height:34px}
nav{display:flex;gap:.25rem 1.1rem;flex-wrap:wrap;margin-left:auto}
nav a{color:var(--muted);text-decoration:none;padding:.3rem 0;border-bottom:2px solid transparent}
nav a[aria-current=page]{color:var(--ink);border-color:var(--accent)}
.page{display:none;padding:3rem 0 4rem}.page.on{display:block}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:.7rem 1.3rem;border-radius:8px;text-decoration:none;font-weight:600;border:0}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.row{display:flex;gap:.75rem;flex-wrap:wrap;margin-top:1.5rem}
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:2.5rem;align-items:center}
.demo{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.4rem}
.demo mark{background:var(--mark);color:inherit;padding:.05em .3em;border-radius:3px;font-weight:600}
.ans{border-left:3px solid var(--line);padding:.2rem 0 .2rem .9rem;margin:.9rem 0;color:var(--muted)}
.ans.good{border-color:var(--accent);color:var(--ink)}
.ans b{display:block;font-size:.85rem;color:var(--muted);font-weight:500}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:2rem 2.5rem;margin-top:1.5rem}
.grid p{color:var(--muted);margin:0}
section.blk{margin-top:4rem}
.video{aspect-ratio:16/9;background:var(--surface);border:1px dashed var(--line);border-radius:12px;display:grid;place-items:center;text-align:center;color:var(--muted);padding:1rem;overflow:hidden}
.video iframe{width:100%;height:100%;border:0}
details{border-bottom:1px solid var(--line);padding:1rem 0}
summary{cursor:pointer;font-weight:600}
details p{margin:.7rem 0 0;color:var(--muted)}
.todo{border:1px dashed var(--accent);border-radius:8px;padding:.8rem 1rem;color:var(--muted);margin:1.5rem 0}
.doc h2{margin-top:2.5rem}.doc h3{margin-top:1.5rem}
.doc,.legal{max-width:760px}
code{font:.9em ui-monospace,Menlo,Consolas,monospace;background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:.05em .35em;overflow-wrap:anywhere}
pre{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:1rem;overflow-x:auto}pre code{border:0;padding:0}
.legal h3{margin-top:2rem}.legal li{margin:.4rem 0}
.team{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:1.5rem;margin-top:2rem}
.m{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1.2rem;text-align:center}
.av{width:96px;height:96px;border-radius:50%;margin:0 auto .8rem;display:grid;place-items:center;background:var(--bg);border:1px dashed var(--muted);color:var(--muted);font-size:.75rem}
.m h3{margin:0 0 .2rem;font-size:1.1rem}.m .role{color:var(--muted);font-size:.9rem;margin:0 auto .6rem}
footer{border-top:1px solid var(--line);padding:1.5rem 0 2rem;color:var(--muted);font-size:.95rem}
footer .wrap{display:flex;gap:1rem 2rem;flex-wrap:wrap;justify-content:space-between}
@media(max-width:760px){.hero{grid-template-columns:1fr}nav{margin-left:0}}