:root{color-scheme:light dark;
--bg:#f5f7f6;--surface:#fff;--text:#16211c;--muted:#5a6b63;--border:#dce3df;
--accent:#1f7a55;--accent-hover:#18633f;--accent-soft:#e6f3ec;--on-accent:#fff;--radius:14px}
@media (prefers-color-scheme:dark){:root{
--bg:#101614;--surface:#18201d;--text:#e6ece9;--muted:#9aaba3;--border:#2b3632;
--accent:#4cc38a;--accent-hover:#6fd3a2;--accent-soft:#17312a;--on-accent:#0c1a14}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}a:hover{color:var(--accent-hover)}
.wrap{max-width:68rem;margin:0 auto;padding:0 1.25rem}
.narrow{max-width:44rem}
header.bar{background:var(--surface);border-bottom:1px solid var(--border)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;height:4.25rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.1rem;color:var(--text);text-decoration:none;letter-spacing:-.01em}
.brand svg{width:2rem;height:2rem}
.nav{display:flex;gap:1.25rem;align-items:center}
.nav a.link{color:var(--muted);text-decoration:none;font-size:.95rem}.nav a.link:hover{color:var(--text)}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:inherit;font-weight:650;font-size:1rem;line-height:1;border-radius:10px;padding:.9rem 1.4rem;text-decoration:none;border:1px solid transparent}
.btn-primary{background:var(--accent);color:var(--on-accent)}.btn-primary:hover{background:var(--accent-hover);color:var(--on-accent)}
.btn-small{padding:.6rem 1rem;font-size:.92rem}
.hero{padding:5rem 0 4rem;text-align:center}
.eyebrow{display:inline-block;background:var(--accent-soft);color:var(--accent);font-weight:650;font-size:.85rem;border-radius:999px;padding:.35rem .8rem;margin-bottom:1.25rem}
h1{font-size:clamp(2.2rem,5vw,3.4rem);line-height:1.1;letter-spacing:-.03em;margin:0 auto 1.25rem;max-width:18ch}
.lede{font-size:1.2rem;color:var(--muted);max-width:38rem;margin:0 auto 2rem}
.cta{display:flex;gap:1rem;justify-content:center;align-items:center;flex-wrap:wrap}
.cta small{color:var(--muted)}
.relay{margin:3.5rem auto 0;max-width:52rem;display:grid;grid-template-columns:1fr 4.5rem 1fr;align-items:center;text-align:left;font-size:.92rem}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 10px 30px -18px rgba(16,40,30,.35);overflow:hidden;height:100%}
.panel-head{display:flex;align-items:center;gap:.6rem;padding:.65rem 1rem;border-bottom:1px solid var(--border);color:var(--muted);font-size:.82rem;font-weight:600}
.record .panel-head{background:var(--accent-soft);border-bottom-color:transparent}
.dots{display:inline-flex;gap:.3rem}.dots i{width:.55rem;height:.55rem;border-radius:50%;background:var(--border)}
.panel dl{margin:0;padding:.6rem 1rem .2rem}
.panel dl div{display:flex;gap:.75rem;padding:.3rem 0}
.panel dt{color:var(--muted);min-width:4.75rem;flex-shrink:0}
.panel dd{margin:0;font-weight:550;min-width:0}
.panel code{font:600 .88rem ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-wrap:anywhere}
.chip{display:inline-flex;align-items:center;gap:.35rem;margin:.4rem 1rem 1rem;padding:.3rem .65rem;border:1px solid var(--border);border-radius:999px;font-size:.82rem;color:var(--muted)}
.chip::before{content:"";width:.7rem;height:.85rem;border-radius:2px;background:#d9534f;opacity:.85}
.ok{color:var(--accent);font-weight:650}
.bridge{display:flex;justify-content:center}
.bridge svg{width:3.5rem;height:1.5rem;overflow:visible;fill:none;stroke:var(--accent);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.bridge circle{fill:var(--accent);stroke:none;animation:relay 2.4s ease-in-out infinite}
@keyframes relay{0%{transform:translateX(0);opacity:0}15%{opacity:1}75%{opacity:1}100%{transform:translateX(52px);opacity:0}}
@media (prefers-reduced-motion:reduce){.bridge circle{animation:none;opacity:0}}
.reassure{color:var(--muted);font-size:.9rem;margin:1rem auto 0;max-width:34rem}
section{padding:4rem 0}
section.alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
h2{font-size:clamp(1.6rem,3.2vw,2.1rem);letter-spacing:-.02em;line-height:1.2;margin:0 0 .6rem}
.sub{color:var(--muted);margin:0 0 2.25rem;max-width:40rem}
.grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.4rem 1.5rem}
section.alt .card{background:var(--bg)}
.card h3{font-size:1.08rem;margin:.25rem 0 .4rem}
.card p{margin:0;color:var(--muted);font-size:.97rem}
.step{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:700}
.icon{font-size:1.4rem}
.guides{grid-template-columns:repeat(auto-fit,minmax(20rem,1fr))}
.steps{margin:.6rem 0 0;padding-left:1.25rem;color:var(--muted);font-size:.97rem;display:grid;gap:.6rem}
.steps li::marker{color:var(--accent);font-weight:700}
.steps b{color:var(--text);font-weight:600}
.card code{font:.9em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--accent-soft);border-radius:4px;padding:.05em .3em;overflow-wrap:anywhere}
.note{color:var(--muted);font-size:.92rem;margin:1.5rem 0 0;max-width:48rem}
.points{list-style:none;padding:0;margin:0;display:grid;gap:.9rem}
.points li{padding-left:1.8rem;position:relative}
.points li::before{content:"";position:absolute;left:0;top:.25em;top:calc((1lh - 1rem) / 2 - 1px);width:1rem;height:1rem;border-radius:50%;background:var(--accent-soft);border:2px solid var(--accent)}
details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem 1.25rem}
details + details{margin-top:.75rem}
summary{cursor:pointer;font-weight:650}
details p{color:var(--muted);margin:.75rem 0 0}
.final{text-align:center}
footer{border-top:1px solid var(--border);padding:2.5rem 0 3rem;color:var(--muted);font-size:.88rem}
footer .links{display:flex;gap:1.25rem;flex-wrap:wrap;margin-bottom:1rem}
footer p{margin:.35rem 0}
.prose h1{font-size:2.2rem;margin:3rem 0 1rem;max-width:none}
.prose p,.prose li{color:var(--text)}
.prose{padding-bottom:3rem}
.prose h2{font-size:1.3rem;margin:2.25rem 0 .5rem}
.prose ul,.prose ol{padding-left:1.25rem}
.prose li + li{margin-top:.4rem}
.prose .updated{color:var(--muted);font-size:.92rem;margin-top:-.5rem}
.notice{background:var(--accent-soft);border:1px solid var(--accent);border-radius:12px;padding:1rem 1.25rem;margin:1.5rem 0}
@media (max-width:48rem){.relay{grid-template-columns:1fr;gap:.25rem;max-width:28rem}.bridge svg{transform:rotate(90deg);margin:.6rem 0}}
@media (max-width:40rem){.nav a.link{display:none}.hero{padding:3.5rem 0 3rem}section{padding:3rem 0}}
a:focus-visible,.btn:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}