:root{--ink:#101a22;--navy:#162b39;--paper:#f5f1e8;--white:#fffdf8;--gold:#b76500;--green:#319c79;--line:#d7d1c5;--muted:#62727e}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,sans-serif}a{color:inherit;text-decoration:none}header{height:90px;padding:0 max(28px,calc((100vw - 1200px)/2));display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);background:rgba(245,241,232,.96);position:sticky;top:0;z-index:5}.logo{width:44px;height:44px;display:grid;place-items:center;color:#f0ad35;background:var(--navy);border-radius:10px 10px 10px 2px;font:700 26px Georgia}header b{font-size:21px}.home{max-width:1100px;margin:auto;padding:80px 28px}.eyebrow{color:var(--gold);font-size:11px;font-weight:900;letter-spacing:.18em}.home h1,.lesson-title h1{margin:12px 0;font:500 clamp(48px,7vw,78px)/1 Georgia,serif;letter-spacing:-.04em}.lede{color:var(--muted);font-size:18px}.module-grid{display:grid;grid-template-columns:1fr 1fr;margin-top:45px;border-top:1px solid var(--line);border-left:1px solid var(--line)}.module-grid>a,.module-grid>.locked{min-height:100px;padding:22px;display:grid;grid-template-columns:44px 1fr auto;gap:12px;align-items:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.35)}.module-grid>a:hover{background:var(--white)}.module-grid i{color:var(--gold);font:500 14px Georgia}.module-grid span{color:var(--gold);font-size:11px;font-weight:800}.module-grid .locked{opacity:.55}aside{margin-top:30px;padding:25px;border-left:5px solid var(--green);background:var(--navy);color:#fff}aside p{color:#c3d0d6;line-height:1.6}footer{padding:35px;text-align:center;color:#9fb0ba;background:#0c171e;font-size:11px}.lesson-layout{max-width:1200px;margin:auto;padding:60px 28px;display:grid;grid-template-columns:270px 1fr;gap:58px}.roadmap{position:sticky;top:130px;align-self:start}.roadmap>span{display:block;margin-bottom:18px;color:var(--muted);font-size:11px;font-weight:900;letter-spacing:.14em}.roadmap a{display:flex;gap:12px;padding:13px 10px;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px}.roadmap a.active{color:#fff;background:var(--navy);border-radius:8px}.roadmap b{color:var(--gold);min-width:24px}.lesson-title{padding:30px 0 50px;border-bottom:1px solid var(--line)}.lesson-title h1 em{color:var(--gold);font-weight:500}.lesson-title>p:last-child{color:var(--muted);font-size:18px;line-height:1.6}.lesson{padding:45px 0;border-bottom:1px solid var(--line)}.lesson h2{margin:7px 0 15px;font:500 30px Georgia}.lesson>p,.lesson li{color:#465761;line-height:1.65}.command{padding:25px;margin:20px 0;color:#fff;background:var(--navy);border-left:5px solid var(--green)}.command b,.command span{display:block}.command b{margin-bottom:10px;color:#fff}.command span{color:#c5d1d7;line-height:1.6}.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:22px 0}.card{padding:20px;border:1px solid var(--line);background:var(--white)}.card b{display:block;margin-bottom:8px}.card span{color:var(--muted);font-size:12px;line-height:1.5}.steps{padding:0;list-style:none;counter-reset:s}.steps li{counter-increment:s;padding:15px 15px 15px 52px;border:1px solid var(--line);border-bottom:0;background:var(--white);position:relative}.steps li:last-child{border-bottom:1px solid var(--line)}.steps li:before{content:counter(s);position:absolute;left:15px;top:13px;width:25px;height:25px;display:grid;place-items:center;color:#fff;background:var(--navy);border-radius:50%;font-size:10px}.check{padding:0;list-style:none}.check li{padding:12px 12px 12px 40px;border-bottom:1px solid var(--line);position:relative}.check li:before{content:'✓';position:absolute;left:12px;color:var(--green);font-weight:900}details{margin:10px 0;border:1px solid var(--line);background:var(--white)}summary{padding:17px;font-weight:800;cursor:pointer}details p{padding:0 17px 17px;color:var(--muted)}.pager{display:flex;justify-content:space-between;gap:10px;padding-top:35px}.pager a{padding:14px 18px;background:var(--navy);color:#fff;border-radius:7px;font-size:12px;font-weight:800}@media(max-width:760px){.module-grid{grid-template-columns:1fr}.lesson-layout{grid-template-columns:1fr;padding:35px 19px}.roadmap{position:static}.roadmap a:not(.active){display:none}.cards{grid-template-columns:1fr}.lesson-title h1{font-size:47px}.home{padding:55px 19px}}