:root{--bg:#0a0a0a;--text:#e0e0e0;--accent:#e8491c;--accent-dark:#c13a17;--card:#1a1a1a;--border:#333}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100%;overflow-x:hidden}body{background-color:var(--bg);color:var(--text);min-height:100vh;font-family:Rajdhani,system-ui,sans-serif;line-height:1.6}h1,h2,h3,.logo,.cta-button,.check-btn,.nav-link,.stage-kicker{font-family:Orbitron,sans-serif}h1,h2,h3{letter-spacing:2px;text-transform:uppercase;font-weight:700}h1{background:linear-gradient(90deg,#e8491c,#ff6b3d);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:1rem;font-size:3.5rem}h2{color:var(--accent);border-bottom:3px solid var(--accent);margin:2rem 0 1rem;padding-bottom:.5rem;font-size:2.2rem}h3{color:#ff8a5c;margin:1.5rem 0 .75rem;font-size:1.5rem}p+p{margin-top:1rem}a{color:var(--accent);text-decoration:none}a:hover{color:#ff8a5c}code{background:#1a1a1a;border-radius:2px;padding:2px 8px;font-size:.95em}nav{border-bottom:3px solid var(--accent);z-index:100;background:#0a0a0af2;position:sticky;top:0}.nav-container{justify-content:space-between;align-items:center;gap:1rem;max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex}.logo{color:var(--accent);letter-spacing:4px;font-size:1.8rem;font-weight:700}.menu{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:1.5rem;list-style:none;display:flex}.menu a,.menu button.linkish{color:var(--accent);cursor:pointer;background:0 0;border:0;font-family:Rajdhani,system-ui,sans-serif;font-size:1.05rem;font-weight:600}.menu button.linkish:hover{color:#ff8a5c}.hero{text-align:center;background-color:#000;background-image:url(/assets/jwst-starfield.svg);background-position:50%;background-repeat:no-repeat;background-size:cover;align-items:center;min-height:90vh;padding:4rem 2rem;display:flex;position:relative;overflow:hidden}.hero-credit{z-index:2;letter-spacing:.04em;color:#c8c8c873;text-transform:none;font-size:.7rem;position:absolute;bottom:1rem;left:1.25rem}.hero-content{max-width:860px;margin:0 auto}.hero h1{margin-bottom:1.5rem;font-size:4.5rem}.hero p{color:#ccc;max-width:700px;margin:0 auto 1.5rem;font-size:1.35rem}.hero-actions{flex-wrap:wrap;justify-content:center;gap:1rem;margin-top:2rem;display:flex}.cta-button,.cta-button-secondary{background:var(--accent);color:#fff;border:3px solid var(--accent);letter-spacing:2px;text-transform:uppercase;padding:1rem 2.5rem;font-size:1.15rem;font-weight:600;display:inline-block}.cta-button:hover,.cta-button-secondary{color:var(--accent);background:0 0}.cta-button-secondary:hover{background:var(--accent);color:#fff}.container{max-width:1100px;margin:0 auto;padding:3rem 2rem}.pitch{text-align:center;max-width:720px;margin:4rem auto 2rem}.pitch h2{display:inline-block}.muted{color:#bbb}.site-footer{text-align:center;border-top:3px solid var(--accent);background:#050505;margin-top:4rem;padding:4rem 2rem}.site-footer p{color:#666;margin-top:.75rem}.stage-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem;margin-top:3rem;display:grid}.stage-card{background:var(--card);border:2px solid var(--border);padding:2rem;position:relative;overflow:hidden}.stage-card:hover{border-color:var(--accent)}.stage-card.completed{background:#0f2a1a;border-color:#22c55e}.stage-number{color:#e8491c26;font-family:Orbitron,sans-serif;font-size:3rem;font-weight:700;line-height:1;position:absolute;top:1.5rem;right:1.5rem}.stage-card h3{color:var(--text);margin-bottom:.75rem;font-size:1.2rem}.progress-bar{background:var(--accent);width:0;height:6px;margin-top:1rem}.stage-card.completed .progress-bar{background:#22c55e;width:100%}.section{margin-bottom:3.5rem}.concepts{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}.concept-card,.example,.exercise,.reading-list li{background:var(--card);padding:1.75rem}.concept-card{border-left:5px solid var(--accent)}.example{border:1px solid var(--border);background:#111;margin:1.5rem 0}.exercises{counter-reset:exercise-counter}.exercise{border:1px solid var(--border);margin-bottom:2rem;position:relative}.exercise:before{counter-increment:exercise-counter;content:"Exercise " counter(exercise-counter);background:var(--bg);color:var(--accent);letter-spacing:1px;padding:0 12px;font-family:Orbitron,sans-serif;font-size:.85rem;position:absolute;top:-12px;left:24px}.hint{color:#aaa;margin-top:.85rem;display:block}.reading-list{flex-direction:column;gap:1rem;list-style:none;display:flex}.reading-list li{border-left:5px solid var(--accent)}.quiz{background:var(--card);border:3px solid var(--accent);margin:3rem 0;padding:2.5rem}.quiz-question{margin:1.75rem 0 1rem;font-size:1.2rem;font-weight:500}.options{flex-direction:column;gap:.75rem;display:flex}.option{cursor:pointer;text-align:left;color:inherit;background:#111;border:2px solid #444;width:100%;padding:1rem 1.5rem;font-family:inherit;font-size:1.05rem}.option:hover:not(:disabled){border-color:var(--accent)}.option.selected{border-color:var(--accent);background:#e8491c26}.option.correct{background:#22c55e1f;border-color:#22c55e}.option.incorrect{background:#ef44441a;border-color:#ef4444}.check-btn,.ghost-btn{background:var(--accent);color:#fff;cursor:pointer;letter-spacing:2px;text-transform:uppercase;border:none;margin-top:1.5rem;padding:1rem 2rem;font-size:1rem}.check-btn:disabled{opacity:.6;cursor:not-allowed}.ghost-btn{border:2px solid var(--accent);color:var(--accent);background:0 0;margin-left:.75rem}.result{margin-top:1.5rem;padding:1rem;font-weight:600}.media-placeholder{text-align:center;color:#777;background:#111;border:3px dashed #555;margin:2rem 0;padding:2.5rem 2rem}.media-placeholder h4{color:var(--accent);letter-spacing:1px;margin-bottom:.5rem;font-family:Orbitron,sans-serif}.footer-nav{border-top:2px solid var(--border);flex-wrap:wrap;justify-content:space-between;gap:1rem;margin-top:4rem;padding-top:2rem;display:flex}.progress-indicator{background:var(--card);border:2px solid var(--accent);z-index:200;padding:.75rem 1.25rem;font-size:.9rem;position:fixed;bottom:20px;right:20px}.login-card{background:var(--card);border:2px solid var(--border);max-width:480px;margin:6rem auto;padding:2.5rem}.login-card h1{font-size:2rem}.field{flex-direction:column;gap:.5rem;margin:1.5rem 0;display:flex}.field input{color:var(--text);background:#111;border:2px solid #444;padding:.9rem 1rem;font-family:inherit;font-size:1.1rem}.field input:focus{border-color:var(--accent);outline:none}.error{color:#ef4444;margin-top:.75rem}.back-link{color:#777;margin-bottom:1.5rem;font-size:.95rem;display:inline-block}@media (max-width:768px){h1{font-size:2.4rem}.hero h1{font-size:2.6rem}.nav-container{flex-direction:column;align-items:flex-start}.menu{gap:1rem}.stage-grid{grid-template-columns:1fr}.ghost-btn{margin-left:0}}