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*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:86px}body{margin:0;min-width:320px;background:linear-gradient(150deg,#071c31,#031321 55%,#071a2d);color:var(--text);font-family:Inter,system-ui,sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}button{font:inherit}.site-header{position:sticky;top:0;z-index:50;height:72px;padding:0 clamp(16px,3vw,44px);display:flex;align-items:center;justify-content:space-between;background:rgba(5,24,42,.97);border-bottom:2px solid var(--gold);backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:13px;font:700 clamp(23px,2vw,30px) Georgia,serif;color:#bdd7ed}.brand img{width:58px;height:55px;object-fit:contain;background:#fff}.brand strong{color:var(--gold)}.nav{display:flex;align-items:center;gap:8px}.nav a{padding:10px 12px;border-radius:8px;font-weight:700;font-size:13px}.nav a:hover,.nav a.active{background:rgba(244,198,45,.1);color:var(--gold)}.nav .compiler-link{background:#1f6ee8;color:#fff}.menu-toggle{display:none;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:#fff;width:44px;height:42px;font-size:21px}
.hero{padding:clamp(48px,7vw,86px) clamp(18px,5vw,72px);background:radial-gradient(circle at 85% 20%,rgba(37,222,246,.11),transparent 29%),radial-gradient(circle at 12% 85%,rgba(244,198,45,.1),transparent 28%)}.hero-inner{max-width:1240px;margin:auto}.eyebrow{margin:0 0 12px;color:var(--gold);font-size:12px;font-weight:800;letter-spacing:.13em}.hero h1{max-width:900px;margin:0;font-size:clamp(38px,5vw,68px);line-height:1.05;letter-spacing:-.04em}.hero p{max-width:790px;margin:18px 0 0;color:#b7d7f4;font-size:clamp(16px,1.5vw,20px)}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 16px;border:1px solid #38698f;border-radius:10px;background:#0b2b48;color:#ecf7ff;font-weight:800;font-size:13px;cursor:pointer}.btn:hover{transform:translateY(-1px);background:#133b5d}.btn.primary{border-color:var(--gold);background:var(--gold);color:#06182a}.btn.secondary{border-color:#34749a;color:#bfe8ff}.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:rgba(37,222,246,.12);color:var(--cyan);font-size:10px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.badge.gold{background:rgba(244,198,45,.13);color:#ffe46c}.badge.green{background:rgba(69,221,160,.13);color:#66efb5}
.page{max-width:1420px;margin:auto;padding:32px clamp(16px,3vw,42px) 60px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:-52px auto 32px;position:relative}.stat{padding:18px;border:1px solid var(--line);border-radius:14px;background:rgba(10,36,61,.96);box-shadow:var(--shadow)}.stat strong{display:block;color:var(--gold);font-size:23px}.stat span{color:var(--muted);font-size:12px}.section-title{margin:38px 0 8px;font-size:clamp(25px,3vw,38px);line-height:1.2}.section-lead{max-width:830px;margin:0 0 22px;color:var(--muted)}.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.case-card{position:relative;overflow:hidden;padding:24px;border:1px solid var(--line);border-radius:17px;background:linear-gradient(145deg,#0b2946,#071d32);box-shadow:var(--shadow)}.case-card::before{content:"";position:absolute;inset:0 auto 0 0;width:4px;background:linear-gradient(var(--cyan),var(--gold))}.case-number{color:#6386a5;font:700 11px "Source Code Pro",monospace}.case-card h2{margin:8px 0 9px;font-size:25px}.case-card p{color:var(--muted)}.concepts{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0 21px}.concepts span{padding:5px 8px;border:1px solid #315c7e;border-radius:7px;color:#aad3f3;font-size:11px}.case-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:20px}.case-meta div{padding:9px;border-radius:8px;background:#061a2d}.case-meta strong{display:block;color:#fff;font-size:11px}.case-meta span{color:#7da4c5;font-size:10px}.roadmap{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.roadmap article{padding:18px;border:1px solid var(--line);border-radius:13px;background:#081f36}.roadmap b{display:grid;place-items:center;width:32px;height:32px;margin-bottom:12px;border-radius:9px;background:var(--gold);color:#07192b}.roadmap h3{margin:0 0 6px;font-size:14px}.roadmap p{margin:0;color:var(--muted);font-size:12px}
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@media(max-width:680px){.site-header{height:66px}.brand img{width:50px;height:48px}.hero{padding:40px 16px 68px}.page{padding:24px 12px 45px}.stats,.case-grid,.requirements,.two-col,.three-col,.trace-box{grid-template-columns:1fr}.case-meta{grid-template-columns:1fr}.roadmap{grid-template-columns:1fr}.toc{grid-template-columns:repeat(2,1fr)}.quiz-options{grid-template-columns:1fr}.code-toolbar{align-items:flex-start;flex-direction:column}.content-card{padding:17px}.flow div{min-width:115px}}
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.case-icon{margin:18px 0 8px;font-size:36px}.case-card h3{margin:8px 0 9px;font-size:25px}.case-card li{color:var(--muted)}.case-card>strong{color:var(--gold)}.four-col{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
@media(max-width:980px){.four-col{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.four-col{grid-template-columns:1fr}}