:root{color-scheme:light;--ink:#182335;--muted:#586477;--line:#dfe4eb;--accent:#4b36ae;--paper:#fff;--surface:#f5f7fa;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.65;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:3px;overflow-wrap:anywhere}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}header,main,footer{width:min(100% - 40px,1000px);margin-inline:auto}header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-block:26px;border-bottom:1px solid var(--line)}.brand{font-weight:760;font-size:1.25rem;letter-spacing:.07em;color:var(--ink);text-decoration:none}nav{display:flex;gap:22px;flex-wrap:wrap;font-size:.94rem}nav a[aria-current=page]{font-weight:700;color:var(--ink)}main{padding-block:56px 72px}.eyebrow{color:var(--accent);font-weight:700;font-size:.9rem;letter-spacing:.07em;text-transform:uppercase;margin:0 0 12px}h1{font-size:clamp(2rem,5vw,3.3rem);line-height:1.12;letter-spacing:-.035em;max-width:800px;margin:0 0 22px}h2{font-size:1.3rem;line-height:1.3;margin:32px 0 10px}p{margin:12px 0}.lead{font-size:1.16rem;color:var(--muted);max-width:740px}.note{padding:20px 24px;border-left:3px solid var(--accent);background:var(--surface);margin:28px 0;max-width:790px}.note p:first-child{margin-top:0}.note p:last-child{margin-bottom:0}.modules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;margin:40px 0}.modules section{border-top:1px solid var(--line);padding-top:16px}.modules h2{margin:0 0 8px}.modules p{color:var(--muted)}article{max-width:790px}article section{scroll-margin-top:20px}li{margin-block:8px}ul{padding-left:22px}.meta{color:var(--muted);font-size:.94rem}.button{display:inline-block;padding:11px 18px;background:var(--accent);color:#fff;text-decoration:none;border-radius:6px;margin-top:16px;font-weight:650}footer{padding-block:24px 38px;border-top:1px solid var(--line);font-size:.94rem;color:var(--muted)}footer p{margin:6px 0}.skip{position:absolute;left:10px;top:-90px;background:white;padding:10px;z-index:2}.skip:focus{top:10px}@media(max-width:650px){header{align-items:flex-start;flex-direction:column;gap:12px}nav{gap:12px 18px}.modules{grid-template-columns:1fr;gap:20px}main{padding-block:36px 48px}.note{padding:16px 18px}h1{font-size:2.2rem}}