:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#e8edf5;background:#0c1220;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid #59dbac;outline-offset:3px}.shell{display:flex;min-height:100vh}.sidebar{width:268px;flex-shrink:0;background:#101827;border-right:1px solid #263147;padding:26px 15px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:12px;padding:4px 10px 35px}.brandicon{background:#194a46;color:#65e2b8;border-radius:12px;padding:10px}.brand strong{font-size:15px}.brand small{display:block;color:#8392a8;font-size:11px;margin-top:4px}.navlabel,.eyebrow{font-size:11px;font-weight:750;letter-spacing:1.6px;color:#8291a7}.navlabel{padding:27px 13px 13px}.nav{display:flex;align-items:center;gap:12px;text-align:left;width:100%;border:0;border-radius:9px;background:transparent;color:#a5b2c4;padding:12px 13px;font-size:13px;margin-bottom:4px}.nav span:nth-child(2){flex:1}.nav.active,.nav:hover{background:#1e2c3f;color:#e8f8f4}.nav.active{box-shadow:inset 3px 0 #5ddbb0}.num{color:#5fd6ad;font-size:11px;font-weight:800}.sidefoot{margin-top:auto;padding:20px 12px;color:#64748b;font-size:11px;line-height:1.7;border-top:1px solid #273247}main{width:100%;min-width:0;max-width:1500px;padding:0 54px;margin:auto}header{display:flex;align-items:center;justify-content:space-between;height:88px;border-bottom:1px solid #243047}.headerbadge{font-size:11px;color:#8fd8bf;background:#183a37;padding:9px 12px;border-radius:20px}.hero{margin-top:38px;background:radial-gradient(ellipse at 100% 0%,#1b4d48 0%,transparent 55%),linear-gradient(125deg,#1a293b,#152035);border:1px solid #2b4150;border-radius:18px;padding:48px 44px}.mint{color:#5cddb2}.hero h1,.lessonhero h1{font-size:clamp(29px,4vw,49px);line-height:1.14;letter-spacing:-1.5px;margin:20px 0}.hero p,.lessonhero p{max-width:620px;color:#aebccd;line-height:1.8;font-size:15px}.herobottom{display:flex;align-items:center;gap:24px;margin-top:28px;color:#92a5b5;font-size:13px}.primary,.secondary{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 20px;border-radius:9px;border:0;font-weight:700;font-size:13px}.primary{background:#5cddb2;color:#102821}.primary:hover{background:#7deac5}.secondary{background:#26354b;color:#e5edf4}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:24px 0 45px}.stats>div{background:#141e2e;border:1px solid #263248;border-radius:12px;padding:20px 23px}.stats strong{display:block;font-size:28px}.stats span{display:block;color:#8797ac;font-size:12px;margin-top:6px}.sectionhead{display:flex;justify-content:space-between;align-items:end;margin-bottom:20px}.sectionhead h2{font-size:24px;letter-spacing:-.6px;margin:9px 0 0}.search{display:flex;align-items:center;gap:8px;background:#172234;border:1px solid #2a3a50;padding:9px 12px;border-radius:9px;color:#8796a9}.search input{border:0;background:none;color:#eaf2fa;outline:0;width:190px;font-size:13px}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.module{border:1px solid #29374a;border-radius:14px;background:#141e2d;padding:23px}.modulehead{display:flex;align-items:center;gap:14px}.moduleindex{width:44px;height:44px;display:grid;place-items:center;border-radius:10px;background:#203c3c;color:#6ae2b6;font-weight:800}.modulehead>div:nth-child(2){flex:1}.module h3{font-size:16px;margin:0 0 5px}.module p{color:#8d9eb1;font-size:12px;margin:0}.modulecount{color:#89a7a1;font-size:12px}.bar{height:5px;border-radius:8px;background:#29394a;margin:20px 0 12px;overflow:hidden}.bar div{height:100%;background:#5cddb2}.lessonrow{display:flex;align-items:center;gap:10px;width:100%;background:transparent;border:0;color:#c4cfdd;text-align:left;padding:12px 2px;border-bottom:1px solid #263246;font-size:13px}.lessonrow:last-child{border-bottom:0}.lessonrow:hover{color:#6ce7be}.lessonrow span{flex:1}.lessonrow small{color:#788a9f}.back{margin:30px 0 12px;background:none;color:#9cb0c3;border:0;display:flex;align-items:center;gap:6px}.lessonhero{background:#16283a;border:1px solid #294053;border-radius:16px;padding:34px;margin-bottom:22px}.lessonhero h1{font-size:35px}.lessonmeta{color:#5ddbb0;font-size:12px;margin-top:20px}.lessonlayout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:20px}.panel{border:1px solid #28374a;background:#141e2d;border-radius:14px;padding:28px;margin-bottom:18px}.panel h2{font-size:21px;line-height:1.4;margin:14px 0}.panel p{color:#b8c6d6;font-size:14px;line-height:1.85}.example{background:#17302f}.answers{display:grid;gap:10px}.answer{display:flex;align-items:center;gap:12px;background:#1b293b;border:1px solid #354458;color:#d4e1ed;border-radius:9px;padding:14px;text-align:left;font-size:13px}.answer span{background:#304258;border-radius:6px;padding:7px 10px;font-weight:700}.answer.selected{border-color:#62d9b1}.answer.correct{background:#1b3934}.feedback{margin-top:15px;padding:14px;background:#203a39;border-radius:8px;font-size:13px;line-height:1.7}textarea{width:100%;background:#101a2a;border:1px solid #34445b;border-radius:10px;padding:14px;color:#e8f1f9;resize:vertical;line-height:1.6}.panel small{display:block;color:#8292a6;margin-top:9px}.outline{height:max-content;position:sticky;top:20px;border:1px solid #2b394c;border-radius:12px;padding:20px;background:#141e2d}.outline button{display:flex;align-items:center;justify-content:space-between;text-align:left;width:100%;background:none;border:0;color:#9faec1;padding:12px 4px;font-size:12px}.outline button.current{color:#5ddbb0}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0 40px}footer{border-top:1px solid #263449;color:#74869b;font-size:11px;padding:28px 0;margin-top:50px}footer button{border:0;background:none;color:#66dbb6;text-decoration:underline}.mobilemenu{display:none;background:none;border:0;color:#fff}@media(max-width:1000px){main{padding:0 26px}.sidebar{width:230px}.cards,.lessonlayout{grid-template-columns:1fr}.outline{position:static;order:-1}}@media(max-width:700px){.sidebar{position:fixed;z-index:10;transform:translate(-100%);transition:transform .2s;width:280px;box-shadow:10px 0 40px #0005}.sidebar.show{transform:translate(0)}main{padding:0 17px}header{height:67px}.mobilemenu{display:block}.headerbadge{font-size:10px}.hero{padding:29px 23px;margin-top:22px}.hero h1{letter-spacing:-1px}.stats{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:32px}.stats>div{padding:16px}.sectionhead{display:block}.search{margin-top:17px}.search input{width:100%}.module{padding:18px}.lessonhero{padding:25px}.panel{padding:20px}.herobottom{flex-wrap:wrap}}