:root{--ink:#15211b;--muted:#617067;--bg:#fbfcfa;--card:#fff;--line:#dfe8e1;--accent:#187a52;--soft:#eaf6ef;--max:1120px}
*{box-sizing:border-box} body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px} .wrap{max-width:var(--max);margin:auto;padding:0 22px}
header{border-bottom:1px solid var(--line);background:rgba(251,252,250,.95);position:sticky;top:0;z-index:5}.nav{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:24px}.logo{font-weight:850;color:var(--ink);text-decoration:none;letter-spacing:-.03em}.logo span{color:var(--accent)}nav a{color:var(--ink);text-decoration:none;margin-left:20px;font-size:.94rem}
.hero{padding:82px 0 54px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:var(--accent)}h1{font-size:clamp(2.35rem,6vw,4.7rem);line-height:1.02;letter-spacing:-.055em;max-width:900px;margin:.2em 0}.lead{font-size:1.2rem;color:var(--muted);max-width:720px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-block;background:var(--accent);color:white;text-decoration:none;padding:12px 18px;border-radius:10px;font-weight:750}.btn.alt{background:var(--soft);color:var(--ink)}
section{padding:38px 0}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}.card h3{margin-top:0;line-height:1.25}.card p{color:var(--muted)}h2{font-size:2rem;letter-spacing:-.035em}.article{max-width:780px;padding:54px 0}.article h1{font-size:clamp(2.2rem,5vw,3.7rem)}.article h2{margin-top:2em}.note{background:var(--soft);border-left:4px solid var(--accent);padding:16px 18px;border-radius:8px;margin:24px 0}.meta{color:var(--muted);font-size:.9rem}.toc{border:1px solid var(--line);border-radius:12px;padding:18px 22px;background:white}.toc a{display:block;margin:5px 0}
table{width:100%;border-collapse:collapse;margin:22px 0;background:white}th,td{text-align:left;padding:12px;border:1px solid var(--line);vertical-align:top}th{background:var(--soft)}
footer{margin-top:60px;border-top:1px solid var(--line);padding:38px 0;color:var(--muted);font-size:.92rem}.foot{display:flex;justify-content:space-between;gap:25px;flex-wrap:wrap}.foot a{margin-right:14px}
@media(max-width:760px){.grid{grid-template-columns:1fr}.nav nav{display:none}.hero{padding-top:58px}}