:root{--bg:#081020;--panel:#101e34;--panel2:#152640;--line:#29415c;--ink:#f1f6fe;--muted:#a9bbd3;--accent:#49dfc1;--blue:#8eafff;--gold:#ffd284}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,Segoe UI,Arial,sans-serif}a{color:var(--blue)}a:hover{color:white}header{border-bottom:1px solid var(--line);background:#0b172a;position:sticky;top:0;z-index:20}.wrap{max-width:1160px;margin:auto;padding:0 24px}.navrow{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:76px;flex-wrap:wrap}.brand{font-size:22px;font-weight:850;letter-spacing:-.7px;color:white;text-decoration:none}.brand span{color:var(--accent)}nav{display:flex;flex-wrap:wrap;gap:18px}nav a{text-decoration:none;color:#c6d4e8;font-weight:650;font-size:14px}.hero{padding:78px 0 45px;background:radial-gradient(ellipse at 80% 20%,#1b3657 0%,transparent 52%)}.eyebrow{color:var(--accent);font-size:12px;letter-spacing:2px;font-weight:800;text-transform:uppercase}.hero h1{max-width:800px;font-size:clamp(38px,5.5vw,66px);line-height:1.12;letter-spacing:-2px;margin:16px 0}.lead{font-size:19px;color:var(--muted);max-width:780px}.button{display:inline-block;text-decoration:none;background:var(--accent);border-radius:12px;color:#071824;font-weight:850;padding:13px 20px;margin:10px 10px 0 0}.button.alt{border:1px solid var(--line);background:var(--panel2);color:white}.stats,.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:25px 0}.card,.panel{background:var(--panel);border:1px solid var(--line);border-radius:17px;padding:24px}.card h3{margin:6px 0}.card p{color:var(--muted)}.card .tag{font-size:12px;font-weight:750;color:var(--accent)}.card a{font-weight:750}.section{padding:34px 0}.section h2{font-size:29px;letter-spacing:-.6px}.grid2{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(250px,.7fr);gap:28px}.article h1{font-size:clamp(30px,4vw,49px);line-height:1.17;letter-spacing:-1.2px}.article h2{font-size:25px;margin-top:42px}.article h3{margin-top:28px}.article p{color:#d1deef}.article ul{color:#d1deef}.article .callout{background:#132b3c;border-left:4px solid var(--accent);border-radius:9px;padding:15px 20px;margin:25px 0}.article .example{border:1px solid #365677;border-radius:12px;padding:18px 20px;margin:18px 0;background:#111f34}.example strong{color:var(--gold)}.aside{position:sticky;top:100px;align-self:start}.aside h3{margin-top:0}.aside a{display:block;padding:8px 0;text-decoration:none}.ad-placeholder{border:1px dashed #49627b;border-radius:13px;min-height:105px;display:flex;align-items:center;justify-content:center;color:#879cb4;font-size:12px;letter-spacing:1.3px;background:#0d1a2b;text-transform:uppercase;margin:30px 0}.ad-placeholder:before{content:'Advertisement placement (inactive)'}footer{border-top:1px solid var(--line);margin-top:60px;padding:28px 0;color:var(--muted);font-size:13px}footer a{margin-right:17px}.lesson-nav{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}.pill{padding:5px 10px;border:1px solid #37506a;border-radius:999px;color:#c4ddfa;font-size:12px}.toc{font-size:14px}.cta{background:linear-gradient(135deg,#163951,#133a35);border:1px solid #356c6a;border-radius:20px;padding:28px;margin:30px 0}.fine{color:var(--muted);font-size:13px}.accent{color:var(--accent)}@media(max-width:760px){.grid2{grid-template-columns:1fr}.aside{position:static}.stats,.cards{grid-template-columns:1fr}.hero{padding-top:46px}.navrow{padding:15px 0}nav{gap:12px}.article h1{font-size:34px}}