:root{
  --bg:#030817; --panel:#081226; --panel2:#0d1930; --text:#f8fafc; --muted:#9aa8bf;
  --blue:#13b8ff; --lime:#c8f02f; --orange:#ff8b16; --purple:#8d55ff; --pink:#ff3e82;
  --cyan:#22d3ee; --border:rgba(148,163,184,.18); --shadow:0 20px 60px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(circle at 15% 10%,#082244 0,#030817 30%),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
a{color:inherit}
button{font:inherit}
.nav{position:sticky;top:0;z-index:50;height:76px;display:flex;align-items:center;justify-content:space-between;padding:8px 3.5%;background:rgba(3,8,23,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.brand img{height:58px;width:auto;display:block}
.nav nav{display:flex;align-items:center;gap:8px;background:rgba(10,20,40,.72);padding:8px;border-radius:18px}
.nav nav a{padding:10px 14px;text-decoration:none;border-radius:12px;color:#e7edf7;font-weight:650}
.nav nav a:hover,.nav nav a.active{background:#101e38;color:white}
.nav nav a.active{box-shadow:inset 0 -3px 0 var(--lime)}
.theme,.nav-quiz{border:0;border-radius:13px;padding:10px 15px;font-weight:800;cursor:pointer}
.theme{background:#18243a;color:white}
.nav-quiz{background:var(--lime);color:#0a1204}
.menu{display:none;background:transparent;border:0;color:white;font-size:28px}
main{min-height:calc(100vh - 150px)}
.container{width:min(1120px,92%);margin:auto}
.hero{padding:72px 0 30px;display:grid;grid-template-columns:1fr 1.1fr;gap:45px;align-items:center}
.hero-art{display:flex;justify-content:center}
.hero-art img{width:min(460px,90%);filter:drop-shadow(0 30px 45px rgba(14,196,255,.13))}
.kicker{color:var(--orange);font-weight:850;font-size:1.05rem;letter-spacing:.2px}
.hero h1{font-size:clamp(3rem,7vw,6.2rem);line-height:.92;margin:8px 0 18px;letter-spacing:-.055em}
.hero h1 span{color:var(--blue)}
.hero h1 em{color:var(--lime);font-style:normal}
.hero p{color:#c2cede;line-height:1.65;font-size:1.1rem;max-width:650px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}
.btn{border:1px solid var(--border);border-radius:13px;padding:13px 19px;font-weight:850;cursor:pointer}
.btn-primary{background:var(--lime);color:#0a1204;border-color:transparent}
.btn-primary:hover{filter:brightness(1.08)}
.btn-secondary{background:#0c1730;color:white}
.section{margin:24px auto 60px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px}
.section h2{font-size:2rem;margin:0}
.underline{height:3px;width:38px;background:var(--cyan);margin-top:7px;border-radius:5px}
.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.category{min-height:180px;border:1px solid var(--border);border-radius:17px;background:linear-gradient(160deg,#0b172c,#071022);padding:18px;text-align:center;display:flex;flex-direction:column;justify-content:center;box-shadow:var(--shadow)}
.category:hover{transform:translateY(-3px);border-color:var(--cyan)}
.category .icon{font-size:2.3rem}
.category h3{margin:8px 0 2px}
.category p{color:var(--muted);margin:0 0 12px}
.category .btn{padding:8px 15px;margin:auto}
.feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:0;background:#071329;border:1px solid var(--border);border-radius:18px;overflow:hidden}
.feature{padding:24px;border-right:1px solid var(--border)}
.feature:last-child{border-right:0}
.feature strong{color:var(--lime);display:block;margin-bottom:7px}
.feature p{margin:0;color:var(--muted);line-height:1.5}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{background:#071329;border:1px solid var(--border);border-radius:17px;padding:22px;text-align:center}
.step b{display:inline-grid;place-items:center;width:34px;height:34px;border:2px solid var(--orange);border-radius:50%;color:var(--orange)}
.step h3{margin:12px 0 5px}.step p{color:var(--muted);margin:0}
.founder{display:grid;grid-template-columns:270px 1fr 270px;gap:30px;align-items:center;background:linear-gradient(135deg,#071329,#09182f);border:1px solid var(--border);border-radius:22px;padding:28px}
.founder-photo{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:18px}
.founder h2{font-size:2.4rem;margin:0 0 12px}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.badge{padding:7px 11px;border-radius:9px;background:#193016;color:#d9ff62;font-weight:800}
.badge.blue{background:#142e54;color:#b9dcff}
.founder p{color:#b5c2d5;line-height:1.65}
.logo-card{background:#071022;border:1px solid var(--border);border-radius:18px;padding:20px;text-align:center}
.logo-card img{width:100%;max-width:240px}
.page{padding:45px 0 70px}
.page h1{font-size:clamp(2rem,5vw,3.4rem);margin:0 0 8px}
.muted{color:var(--muted)}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.quiz-card{max-width:800px;margin:25px auto;background:#071329;border:1px solid var(--border);border-radius:22px;padding:28px;box-shadow:var(--shadow)}
.progress{display:flex;justify-content:space-between;color:var(--muted);font-size:.95rem}
.progressbar{height:7px;background:#14213a;border-radius:8px;overflow:hidden;margin:12px 0 26px}
.progressbar span{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--lime));transition:width .25s}
.quiz-q{font-size:clamp(1.35rem,3vw,2rem);line-height:1.3;margin:0 0 20px}
.answers{display:grid;gap:11px}
.answer{border:1px solid var(--border);background:#0b1830;color:white;border-radius:13px;padding:14px;text-align:left;cursor:pointer}
.answer:hover:not(:disabled){border-color:var(--blue);background:#0e2241}
.answer.correct{background:#12371d;border-color:#5ee879}.answer.wrong{background:#40171d;border-color:#ff6c7e}
.feedback{min-height:28px;font-weight:800;margin:15px 0}
.results{text-align:center}.score{font-size:5rem;font-weight:900;color:var(--lime);margin:8px}
table{width:100%;border-collapse:collapse;background:#071329;border:1px solid var(--border);border-radius:15px;overflow:hidden}
th,td{padding:14px;border-bottom:1px solid var(--border);text-align:left}
.empty{padding:30px;text-align:center;background:#071329;border:1px solid var(--border);border-radius:15px}
footer{border-top:1px solid var(--border);background:#020713}
.footer-inner{width:min(1120px,92%);margin:auto;padding:25px 0;display:flex;justify-content:space-between;gap:20px;color:var(--muted)}
.footer-inner strong{color:white}.footer-inner span{margin-left:10px;color:var(--lime)}
@media(max-width:950px){
 .grid{grid-template-columns:repeat(3,1fr)} .hero{grid-template-columns:1fr;text-align:center}.hero p{margin-left:auto;margin-right:auto}.actions{justify-content:center}
 .founder{grid-template-columns:200px 1fr}.logo-card{display:none}.steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
 .nav{height:68px}.brand img{height:48px}.menu{display:block}.nav nav{display:none;position:absolute;top:68px;left:3%;right:3%;flex-direction:column;align-items:stretch;padding:10px;background:#071329;border:1px solid var(--border)}
 .nav nav.open{display:flex}.nav nav a{text-align:center}.nav-quiz,.theme{width:100%}
 .grid,.category-grid{grid-template-columns:repeat(2,1fr)}.feature-strip{grid-template-columns:1fr}.feature{border-right:0;border-bottom:1px solid var(--border)}.feature:last-child{border-bottom:0}
 .founder{grid-template-columns:1fr;text-align:center}.founder-photo{max-width:280px;margin:auto}.steps{grid-template-columns:1fr}.footer-inner{flex-direction:column;text-align:center}
}
@media(max-width:430px){.grid,.category-grid{grid-template-columns:1fr}.hero{padding-top:42px}.hero h1{font-size:3.4rem}}

.card{background:#071329;border:1px solid var(--border);border-radius:18px;padding:24px;color:#fff}