:root{--bg:#fbf9f4;--fg:#1d2420;--mut:#5a645e;--line:#e3dfd3;--card:#fff;--acc:#1f6b52;--accfg:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#141a17;--fg:#ecefe9;--mut:#a3aea6;--line:#2a332e;--card:#1b231f;--acc:#6fcfa6;--accfg:#0f1a14}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--acc)}a:focus-visible,.btn:focus-visible{outline:3px solid var(--acc);outline-offset:3px}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header{padding:22px 0;border-bottom:1px solid var(--line)}
header .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.brand{font-weight:700;letter-spacing:.01em;text-decoration:none;color:var(--fg);font-size:1.15rem}
nav a{margin-left:18px;text-decoration:none;color:var(--mut);font-size:.95rem}nav a:hover{color:var(--fg)}
.hero{padding:64px 0 40px}
h1{font-size:clamp(2rem,6vw,3.1rem);line-height:1.12;margin:0 0 18px;letter-spacing:-.02em}
.lead{font-size:1.2rem;color:var(--mut);max-width:640px;margin:0 0 28px}
.btn{display:inline-block;background:var(--acc);color:var(--accfg);padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
.btn.alt{background:transparent;color:var(--acc);border:1.5px solid var(--acc);margin-left:10px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin:8px 0 56px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h2{font-size:1.05rem;margin:0 0 8px}.card p{margin:0;color:var(--mut);font-size:.98rem}
section.note{border-top:1px solid var(--line);padding:36px 0}
section.note h2{margin:0 0 10px;font-size:1.25rem}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--mut);font-size:.92rem}
footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
main.doc{padding:44px 0 56px}main.doc h1{font-size:2rem}main.doc h2{font-size:1.2rem;margin:30px 0 6px}
@media (max-width:520px){.btn.alt{margin:12px 0 0}nav a{margin-left:12px}}