:root{
  --ink:#15181b;--ink2:#252a2f;--paper:#f6f5f1;--white:#fff;--line:#dddcd6;
  --champ:#c6a164;--muted:#6f7479;--good:#2f6e57;--warn:#a86f2c;--bad:#8f3a36;
  --radius:22px;--shadow:0 20px 70px rgba(18,22,24,.10);--max:1120px
}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit}
.shell{max-width:var(--max);margin:auto;padding:28px 20px 80px}
.narrow{max-width:720px}
.sitebar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:34px}
.brand{text-decoration:none;font-weight:900;letter-spacing:.02em;font-size:20px}
.brand span{color:var(--champ)}
.nav{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--muted);font-size:14px}
.nav .cta{background:var(--ink);color:#fff;padding:10px 14px;border-radius:10px}
.kicker{font-size:12px;letter-spacing:.15em;font-weight:900;color:var(--champ)}
h1{font-size:clamp(34px,5vw,58px);line-height:1;margin:10px 0 18px;letter-spacing:-.04em}
h2{margin-top:0}
.lede{font-size:18px;color:var(--muted);line-height:1.55}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:16px 0;box-shadow:var(--shadow)}
.qr{width:160px;height:160px;padding:8px;border:1px solid var(--line);display:block;margin:12px 0}
.preview{display:block;width:100%;max-height:620px;object-fit:contain;margin-top:16px;background:#111;border-radius:16px}
input,button{font:inherit;padding:12px 14px;border:1px solid var(--line);border-radius:11px;margin:6px 6px 6px 0}
input[type=text],input[type=password],input[type=email]{width:100%;max-width:520px;background:#fff}
button{font-weight:800;cursor:pointer;background:var(--ink);color:#fff}
button:disabled{opacity:.45}
.row{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.pill{padding:8px 12px;border-radius:999px;background:#eee;font-size:12px;font-weight:900}
.pill.good{background:#e5f0eb;color:var(--good)}
.pill.adjust{background:#f6eadc;color:var(--warn)}
.pill.fail{background:#f1dfdd;color:var(--bad)}
.checks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:16px 0}
.checks>div{border:1px solid var(--line);padding:13px;border-radius:13px}
.checks span{display:block;font-size:12px;color:var(--muted)}
.checks strong{display:block;margin-top:5px}
.recommend{border-left:3px solid var(--champ);background:#faf8f3;padding:14px 18px}
.meter{position:relative;aspect-ratio:4/3;background:#111;border-radius:18px;overflow:hidden}
.meter video{width:100%;height:100%;object-fit:cover}
.guide{position:absolute;inset:18%;border:2px solid #fff;color:#fff;display:grid;place-items:end center;padding:8px;font-size:12px}
.code{font-size:18px}
pre{white-space:pre-wrap;background:#15181b;color:#eee;padding:14px;border-radius:12px;overflow:auto;font-size:12px}
.auth-card{max-width:560px;margin:40px auto}
.auth-card form p{margin:0 0 14px}
.auth-card label{display:block;font-weight:700;margin-bottom:6px}
.auth-card .helptext{display:block;color:var(--muted);font-size:12px;line-height:1.4;margin-top:5px}
.auth-card ul.errorlist{color:var(--bad);padding-left:18px}
.auth-actions{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.small{font-size:13px;color:var(--muted)}
.notice{padding:12px 14px;border-radius:12px;background:#faf8f3;border:1px solid var(--line);margin:12px 0}
@media(max-width:700px){.checks{grid-template-columns:1fr 1fr}.sitebar{align-items:flex-start}.nav{justify-content:flex-end}}
@media(max-width:450px){.checks{grid-template-columns:1fr}.sitebar{display:block}.nav{margin-top:12px;justify-content:flex-start}}