:root{--ink:#0f172a;--muted:#475569;--bg:#fff;--soft:#f1f5f9;--accent:#16a34a;--line:#e2e8f0}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:46rem;margin:0 auto;padding:0 1.25rem}
a{color:var(--accent)}
.top{border-bottom:1px solid var(--line)}.top .wrap{display:flex;justify-content:space-between;align-items:center;min-height:3.5rem;flex-wrap:wrap;gap:.5rem}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:800;color:var(--ink);text-decoration:none;letter-spacing:.02em}
nav a{margin-left:1rem;color:var(--ink);text-decoration:none;font-weight:600}nav a:hover{color:var(--accent)}
.hero{background:var(--ink);color:#fff;padding:3.5rem 0 3rem;border-bottom:6px solid var(--accent)}
.hero h1{font-size:clamp(2.75rem,12vw,5rem);line-height:1;margin:0 0 1rem;font-weight:900;letter-spacing:.06em;font-style:italic}
.tag{font-size:1.25rem;font-weight:700;margin:0 0 1rem}.lead{color:#cbd5e1;margin:0}
.sec{padding:2.25rem 0;border-bottom:1px solid var(--line)}.sec:nth-of-type(odd){background:var(--soft)}
h2{font-size:1.4rem;margin:0 0 .75rem;text-transform:uppercase;letter-spacing:.04em}
h2::before{content:"";display:inline-block;width:.5rem;height:1.1rem;background:var(--accent);margin-right:.5rem;transform:skew(-15deg);vertical-align:-2px}
.sec-how-it-works ol{padding-left:1.25rem}.sec-how-it-works li{margin:.4rem 0}
.prose h2{text-transform:none;font-size:1.2rem;margin-top:2rem}.prose h3{margin-top:1.75rem}
table{border-collapse:collapse;width:100%;display:block;overflow-x:auto}th,td{border:1px solid var(--line);padding:.5rem;text-align:left;vertical-align:top}
.banner{background:#fef3c7;border-bottom:2px solid #d97706;color:#78350f;padding:.75rem 1.25rem;text-align:center;position:sticky;top:0}
.foot{padding:2rem 0;color:var(--muted);font-size:.875rem}
@media(min-width:48rem){.hero{padding:5rem 0 4rem}.sec{padding:3rem 0}}