:root{--bg:#ffffff;--fg:#141414;--muted:#6b6b6b;--line:#ececec;--link:#141414}
@media (prefers-color-scheme:dark){:root{--bg:#0f0f0f;--fg:#f5f5f5;--muted:#9a9a9a;--line:#232323;--link:#f5f5f5;color-scheme:dark}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-feature-settings:"cv11","ss01";-webkit-font-smoothing:antialiased}
.wrap{max-width:680px;margin:0 auto;padding:28px max(24px,env(safe-area-inset-left)) 48px;min-height:100vh;display:flex;flex-direction:column}
header{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);text-decoration:none;font-weight:600;font-size:17px;letter-spacing:-.01em}
.mark{width:22px;height:auto;display:block}.mark path{fill:var(--fg)}
nav{display:flex;gap:22px}
nav a{color:var(--muted);text-decoration:none;font-size:14px}
nav a:hover{color:var(--fg)}
main{flex:1}
h1{font-size:34px;line-height:1.15;letter-spacing:-.025em;font-weight:700;margin:0 0 10px;text-wrap:balance}
.hero h1{font-size:clamp(34px,6vw,48px);margin-bottom:20px}
.lead{font-size:19px;color:var(--muted);margin:0 0 28px;text-wrap:pretty}
.note{font-size:15px;color:var(--muted)}
h2{font-size:17px;font-weight:600;letter-spacing:-.01em;margin:36px 0 6px}
p,li{color:var(--fg)}
ul,ol{padding-left:20px}
li{margin:6px 0}
a{color:var(--link);text-underline-offset:3px;text-decoration-thickness:1px}
.meta{color:var(--muted);font-size:14px;margin:0 0 32px}
strong{font-weight:600}
footer{margin-top:72px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
footer a{color:var(--muted)}
@media (max-width:480px){header{margin-bottom:48px}nav{gap:16px}}
.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin:56px 0 40px;padding-top:32px;border-top:1px solid var(--line)}
.features h2{margin:0 0 6px;font-size:15px}
.features p{margin:0;color:var(--muted);font-size:15px;line-height:1.6}
@media (max-width:640px){.features{grid-template-columns:1fr;gap:22px}}