:root{--brand:#0f766e;--brand-soft:#e6f4f1;--ink:#15181c;--muted:#5f6670;--line:#e3e6ea;--bg:#fff;--alt:#f6f7f8;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--brand:#2dd4bf;--brand-soft:#123a36;--ink:#eceef1;--muted:#9aa3ad;--line:#2a2f36;--bg:#0f1114;--alt:#181b20}}
*{box-sizing:border-box}
body{margin:0;font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-text-size-adjust:100%}
a{color:var(--brand)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:5}
header.site .wrap{display:flex;align-items:center;gap:16px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);text-decoration:none;margin-right:auto}
.brand img{width:32px;height:32px;border-radius:8px}
header.site nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:15px;margin-left:14px}
@media (max-width:600px){header.site nav a.hide-sm{display:none}}
.cta{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 24px;border-radius:12px;background:var(--brand);color:#fff;font-weight:700;text-decoration:none;font-size:17px}
@media (prefers-color-scheme:dark){.cta{color:#062a26}}
.cta.small{min-height:42px;padding:0 16px;font-size:15px}
.cta.alt{background:transparent;color:var(--brand);border:2px solid var(--brand)}
.hero{padding:56px 0 40px}
.hero h1{font-size:clamp(32px,6vw,52px);line-height:1.08;margin:0 0 16px;letter-spacing:-.02em}
.hero p.lead{font-size:20px;color:var(--muted);margin:0 0 28px;max-width:640px}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.hero .note{color:var(--muted);font-size:14px;margin-top:12px}
h1{font-size:clamp(28px,5vw,40px);line-height:1.15;letter-spacing:-.01em;margin:40px 0 12px}
h2{font-size:24px;line-height:1.25;margin:44px 0 12px}
h3{font-size:19px;margin:24px 0 8px}
p,li{max-width:70ch}
.lead{font-size:19px;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:18px 0}
.box{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--alt)}
.box h3{margin:0 0 6px}
.box p{margin:0;color:var(--muted);font-size:15.5px}
.links{columns:2 200px;padding-left:18px}
.links li{margin:4px 0}
table{width:100%;border-collapse:collapse;margin:14px 0;font-size:15px}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr.total td{font-weight:800;border-top:2px solid var(--ink);border-bottom:0}
.paper{border:1px solid var(--line);border-radius:14px;padding:24px;background:var(--bg);box-shadow:0 8px 30px rgba(0,0,0,.06);margin:18px 0;overflow-x:auto}
.paper .head{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:5px solid var(--brand);padding-top:14px}
.paper .title{font-size:22px;font-weight:800;color:var(--brand);text-transform:uppercase}
.paper small{color:var(--muted)}
.banner{background:var(--brand-soft);border-radius:16px;padding:24px;margin:36px 0;display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.banner strong{font-size:20px}
details{border-bottom:1px solid var(--line);padding:12px 0}
summary{cursor:pointer;font-weight:700;font-size:17px}
details p{color:var(--muted);margin:8px 0 0}
.crumbs{font-size:14px;color:var(--muted);margin-top:20px}
.crumbs a{color:var(--muted)}
.check li{list-style:none;position:relative;padding-left:28px;margin:6px 0}
.check li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:800}
.price{font-size:32px;font-weight:800;margin:4px 0}
.muted{color:var(--muted)}
footer.site{border-top:1px solid var(--line);margin-top:64px;padding:28px 0 40px;color:var(--muted);font-size:14.5px;background:var(--alt)}
footer.site a{color:var(--muted)}
footer.site .cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:18px}
footer.site h4{margin:0 0 8px;color:var(--ink);font-size:14px}
footer.site ul{list-style:none;padding:0;margin:0}
footer.site li{margin:3px 0}
code{background:var(--alt);padding:2px 6px;border-radius:6px;font-size:.92em}
.demo{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--alt);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:15px}