:root{--paper:#f3f2ec;--ink:#172b29;--muted:#53645e;--line:#cbd3c9;--green:#b7e35e;--deep:#173b33}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:inherit;text-underline-offset:5px}a:hover{color:#48671d}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #597c20;outline-offset:4px}.wrap{width:min(1180px,calc(100% - 56px));margin:auto}header{border-bottom:1px solid var(--line)}.top{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:24px 0}.brand{font-size:24px;font-weight:750;letter-spacing:-1px;text-decoration:none;display:flex;align-items:center;gap:12px}.mark{background:var(--deep);color:var(--green);width:35px;height:35px;display:grid;place-items:center;font-size:24px;border-radius:7px}nav{display:flex;gap:28px;font-size:14px}nav a{text-decoration:none}.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:var(--muted)}.hero{padding:86px 0 70px;display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}h1{font-size:clamp(40px,5.5vw,70px);line-height:1.04;letter-spacing:-.055em;font-weight:650;margin:20px 0 26px}h2{font-size:32px;line-height:1.2;letter-spacing:-.03em}h3{line-height:1.25;font-size:22px;letter-spacing:-.02em}.lead{font-size:20px;max-width:580px;color:var(--muted)}.button{display:inline-block;background:var(--deep);color:#fff;padding:12px 20px;border-radius:5px;text-decoration:none;font-size:14px;font-weight:650;margin:18px 16px 0 0}.button:hover{background:#285144;color:#fff}.text-link{font-size:14px}.diagram{border:1px solid var(--line);background:#e9ece2;border-radius:16px;padding:28px}.diagram svg{width:100%;height:auto;display:block}.caption{font-size:12px;color:var(--muted);margin:15px 0 0}.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;font-size:13px;display:flex;gap:36px;flex-wrap:wrap}.section{padding:62px 0}.split{display:grid;grid-template-columns:1fr 1.5fr;gap:80px}.rows{border-top:1px solid var(--line)}.row{display:grid;grid-template-columns:40px 1fr;gap:20px;padding:25px 0;border-bottom:1px solid var(--line)}.num{font:13px ui-monospace,monospace;color:var(--muted)}.row h3{margin:0 0 10px}.row p{margin:0;color:var(--muted)}.callout{background:var(--deep);color:var(--paper);border-radius:14px;padding:38px}.callout p{color:#c9d7cc}.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.note{border-top:3px solid var(--deep);padding:20px 0}.note a{text-decoration:none}.note p{font-size:15px;color:var(--muted)}.article{max-width:760px;padding:65px 0 80px}.article h1{font-size:clamp(36px,5vw,54px)}.article h2{font-size:27px;margin-top:40px}.article p,.article li{color:var(--muted)}.article li{margin-bottom:12px}.article code{font-size:.9em;color:var(--ink)}.crumb{font-size:13px;color:var(--muted)}.tool{border:1px solid var(--line);border-radius:12px;padding:28px;margin:35px 0}.tool label{display:grid;grid-template-columns:1fr 110px;gap:20px;align-items:center;margin:16px 0;font-size:14px}.tool input{width:100%;padding:10px;border:1px solid #8b9c90;border-radius:4px;background:white;color:var(--ink);font:inherit}.result{font-size:28px;font-weight:700;color:var(--ink)}footer{border-top:1px solid var(--line);padding:28px 0 40px;font-size:12px;color:var(--muted)}.bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.muted{color:var(--muted)}
@media(max-width:760px){.wrap{width:min(100% - 36px,600px)}.top{align-items:flex-start;flex-direction:column;gap:16px}nav{gap:22px}.hero{grid-template-columns:1fr;gap:32px;padding:46px 0}.lead{font-size:18px}.diagram{padding:20px}.split{grid-template-columns:1fr;gap:20px}.section{padding:40px 0}.notes{grid-template-columns:1fr;gap:8px}.strip{gap:12px 24px}.callout{padding:26px}.article{padding:40px 0}.row{gap:10px;grid-template-columns:30px 1fr}}