*{box-sizing:border-box}body{margin:0;font:17px/1.55 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1d2433;background:#fbfaf7}
header,main,footer{max-width:860px;margin:0 auto;padding:0 16px}header{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding-top:14px}
.logo{font-weight:800;font-size:1.25rem;color:#0b6e4f;text-decoration:none}nav a{margin-left:14px;color:#1d2433}a{color:#0b5cad}
h1{font-size:1.8rem;line-height:1.2;margin:.6em 0 .3em}h2{margin-top:1.6em}.big{font-size:2.6rem;font-weight:800;color:#0b6e4f}.big span{font-size:1rem;color:#555}
table{border-collapse:collapse;width:100%;margin:.6em 0;font-size:.95rem}th,td{text-align:left;padding:6px 8px;border-bottom:1px solid #e3e0d8}
.calc{display:flex;flex-wrap:wrap;gap:12px;align-items:end;background:#eef6f1;padding:12px;border-radius:8px;margin:1em 0}.calc input,.calc select{display:block;font:inherit;padding:6px}
.calc output{font-size:1.4rem;font-weight:700}.buy{display:inline-block;background:#f0a020;color:#111;padding:10px 16px;border-radius:6px;font-weight:700;text-decoration:none}
.muted,.crumbs{color:#666;font-size:.9rem}footer{margin-top:3em;padding-bottom:2em;color:#666;font-size:.85rem;border-top:1px solid #e3e0d8}
@media (prefers-color-scheme:dark){body{background:#14171c;color:#e6e6e6}a{color:#7fb6ff}.logo,.big{color:#5fd3a5}.calc{background:#1d2a24}th,td{border-color:#333}nav a{color:#e6e6e6}}