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Neue,Impact,sans-serif;font-size:clamp(28px,3vw,44px);color:#fff;letter-spacing:2px;margin-bottom:6px}.page-subtitle{font-size:14px;color:var(--subtle);font-weight:300}.cards-grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.cards-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.cards-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}@media (max-width: 900px){.cards-grid-3,.cards-grid-4{grid-template-columns:repeat(2,1fr)}}@media (max-width: 600px){.cards-grid-2,.cards-grid-3{grid-template-columns:1fr}.cards-grid-4{grid-template-columns:repeat(2,1fr)}}.prose-lesson{color:var(--subtle);line-height:1.85;font-size:17px}.prose-lesson h2{font-size:27px;font-weight:800;color:#fff;margin:40px 0 14px;letter-spacing:-.3px;line-height:1.25}.prose-lesson h3{font-size:19px;font-weight:700;color:var(--text);margin:30px 0 10px;line-height:1.35}.prose-lesson p{margin-bottom:18px}.prose-lesson ul,.prose-lesson ol{padding-left:22px;margin-bottom:18px}.prose-lesson li{margin-bottom:8px}.prose-lesson code{font-family:JetBrains Mono,monospace;font-size:14px;color:var(--electric);background:var(--black);padding:2px 7px;border-radius:4px}.prose-lesson pre{background:var(--black);border:1px solid var(--border);border-radius:10px;padding:22px;overflow-x:auto;margin:22px 0;font-family:JetBrains Mono,monospace;font-size:14px;line-height:1.7}.prose-lesson pre code{background:none;padding:0;color:var(--text);font-size:14px}.prose-lesson strong{color:#fff;font-weight:700}.prose-lesson table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14px}.prose-lesson th{text-align:left;padding:12px 16px;border-bottom:1px solid var(--border);color:var(--text);font-weight:700}.prose-lesson td{padding:12px 16px;border-bottom:1px solid var(--border);color:var(--subtle)}.prose-lesson blockquote{border-left:3px solid var(--electric);padding:14px 22px;margin:22px 0;background:#06b6d40f;border-radius:0 8px 8px 0;color:var(--text);font-size:16px}.prose-lesson hr{border:none;border-top:1px solid var(--border);margin:32px 0}.course-shell{display:flex;gap:32px;align-items:flex-start;max-width:1200px;margin:0 auto;padding:24px 32px 80px}.course-shell-rail{width:320px;flex-shrink:0;position:sticky;top:24px;max-height:calc(100vh - 48px);overflow-y:auto}.course-shell-main{flex:1;min-width:0;max-width:760px}.course-shell-backdrop{display:none;position:fixed;inset:0;background:#0009;z-index:199}.course-shell-backdrop.is-open{display:block}@media (max-width: 1024px){.course-shell{flex-direction:column;gap:0;padding:16px 16px 100px}.course-shell-rail{width:320px;max-width:88vw;position:fixed;top:0;left:0;bottom:0;z-index:200;background:var(--deep);border-right:1px solid var(--border);max-height:100vh;padding:20px 18px;transform:translate(-100%);transition:transform .25s ease;box-shadow:8px 0 32px #00000080}.course-shell-rail.is-open{transform:translate(0)}.course-shell-main{max-width:100%;width:100%}}@media (max-width: 600px){.course-shell{padding:12px 14px 100px}}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:var(--black)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--muted)}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes glowPulse{0%,to{box-shadow:0 0 8px #06b6d459}50%{box-shadow:0 0 20px #06b6d4a6}}.animate-fade-up{animation:fadeUp .5s ease forwards}.glow-electric{animation:glowPulse 2s ease-in-out infinite}