:root{--ink:#111827;--muted:#667085;--bg:#f7f8f4;--panel:#fff;--soft:#eef1ff;--line:#dfe3ea;--blue:#3157d5;--blue-dark:#213c9c;--cyan:#1597ff;--shadow:0 18px 50px rgba(28,39,64,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}a{color:inherit}.skip{position:absolute;top:-5rem;left:1rem;background:var(--blue);color:#fff;padding:.7rem 1rem;border-radius:8px}.skip:focus{top:1rem}.top{height:72px;max-width:1040px;margin:auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{font-weight:850;letter-spacing:-.04em;text-decoration:none}.brand span{color:var(--blue)}.back{color:var(--muted);font-size:.88rem;text-decoration:none}.back:hover{color:var(--blue)}main{max-width:920px;margin:auto;padding:80px 24px}.crumb{color:var(--blue);text-transform:uppercase;letter-spacing:.16em;font-size:.7rem;font-weight:800}.hero{text-align:center;padding:15px 0 75px}.icon{display:grid;place-items:center;margin:0 auto 22px;width:66px;height:66px;border:1px solid #cbd3e8;background:var(--soft);border-radius:20px;font-size:2rem;color:var(--blue)}h1{font-size:clamp(2.4rem,7vw,5rem);line-height:1.04;letter-spacing:-.06em;margin:0}h1 span{color:var(--blue)}.lede{max-width:650px;color:var(--muted);margin:22px auto}.counter{font-size:clamp(3rem,9vw,6.5rem);font-weight:880;letter-spacing:-.07em;line-height:1;font-variant-numeric:tabular-nums;margin-top:40px;color:#0b1638}.approx{text-transform:uppercase;color:var(--muted);letter-spacing:.18em;font-size:.65rem;font-weight:750}.range{display:none}.label{font-size:.8rem;color:var(--muted);background:var(--soft);border:1px solid #cbd3e8;border-radius:999px;display:inline-block;padding:7px 12px}.actions{display:flex;justify-content:center;gap:12px;margin-top:26px}.button{border:1px solid var(--line);border-radius:999px;padding:11px 18px;text-decoration:none;font-weight:750;background:var(--panel);cursor:pointer}.button.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.button.primary:hover{background:var(--blue-dark)}section{margin-top:50px}h2{font-size:clamp(1.7rem,4vw,2.5rem);letter-spacing:-.04em;line-height:1.15}.card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:25px;box-shadow:var(--shadow)}.formula{font-family:ui-monospace,monospace;color:var(--blue);overflow-wrap:anywhere}.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:18px}.fact{background:#fbfcfe;border:1px solid var(--line);border-radius:14px;padding:15px}.fact small{display:block;color:var(--muted)}.fact strong{font-size:1.1rem}.caveat{border-left:3px solid var(--blue);padding:14px 17px;background:var(--soft);color:var(--muted)}.related{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.related a{background:var(--panel);border:1px solid var(--line);padding:16px;border-radius:14px;text-decoration:none;font-weight:700}.related a:hover{border-color:var(--blue);color:var(--blue)}footer{border-top:1px solid var(--line);max-width:1040px;margin:30px auto 0;padding:30px 24px;color:var(--muted);font-size:.8rem;display:flex;justify-content:space-between}:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}@media(max-width:650px){main{padding-top:55px}.facts{grid-template-columns:1fr 1fr}.related{grid-template-columns:1fr}.actions{flex-direction:column}.button{text-align:center}footer{display:block;text-align:center}}