:root{
  --bg:#f7f2ea;
  --paper:#fffaf2;
  --ink:#21170f;
  --muted:#6e5d4d;
  --line:#e5d8c8;
  --accent:#7a3f1d;
  --accent2:#c7925b;
  --good:#187246;
  --bad:#a93525;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
a{color:inherit;text-decoration:none}
.hero{padding:24px;min-height:70vh;background:radial-gradient(circle at 80% 20%,#e7c9a3 0,#f7f2ea 38%,#efe1d0 100%)}
.nav{display:flex;justify-content:space-between;align-items:center;max-width:1160px;margin:0 auto 70px}
.brand{font-weight:800;letter-spacing:-.03em;font-size:1.25rem}
.nav-links{display:flex;gap:22px;color:var(--muted);font-weight:600}
.hero-grid{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--accent);font-weight:800;font-size:.78rem}
h1{font-size:clamp(2.7rem,7vw,6rem);line-height:.9;margin:0 0 24px;letter-spacing:-.07em}
h2{font-size:clamp(2rem,4vw,3.6rem);line-height:1;margin:0;letter-spacing:-.05em}
h3{line-height:1.2}
.lead{font-size:1.25rem;max-width:720px;color:var(--muted)}
.hero-actions,.quiz-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.button{border:1px solid var(--ink);border-radius:999px;padding:13px 18px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;background:transparent}
.button.primary{background:var(--ink);color:white}
.button.secondary{background:var(--paper)}
.button.ghost{border-color:var(--line);color:var(--muted)}
.button.small{padding:10px 14px;font-size:.95rem}
button:disabled{opacity:.45;cursor:not-allowed}
.stat-card{background:rgba(255,250,242,.76);border:1px solid var(--line);border-radius:32px;padding:34px;box-shadow:0 20px 70px rgba(80,50,20,.12)}
.stat-number{display:block;font-size:5rem;font-weight:900;letter-spacing:-.08em}
.stat-label{color:var(--muted);font-weight:700}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}
.mini-stats div{background:white;border:1px solid var(--line);border-radius:20px;padding:14px}
.mini-stats strong{display:block;font-size:1.4rem}
.mini-stats span{font-size:.8rem;color:var(--muted)}
.panel{max-width:1160px;margin:0 auto;padding:72px 24px}
.panel.alt{max-width:none;background:#fff7ec;padding-left:max(24px,calc((100vw - 1160px)/2 + 24px));padding-right:max(24px,calc((100vw - 1160px)/2 + 24px))}
.section-title{margin-bottom:28px}
.controls{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}
label{font-weight:800;color:var(--muted);font-size:.88rem}
select{width:100%;margin-top:6px;padding:13px;border-radius:16px;border:1px solid var(--line);background:white;font:inherit;color:var(--ink)}
.quiz-card{background:var(--paper);border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:0 18px 50px rgba(80,50,20,.08)}
.quiz-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.quiz-meta span{border:1px solid var(--line);border-radius:999px;padding:6px 10px;font-weight:800;font-size:.8rem;color:var(--muted);background:white}
#questionText{font-size:1.55rem;margin:0 0 22px}
.answers{display:grid;gap:10px}
.answer{width:100%;text-align:left;border:1px solid var(--line);border-radius:18px;background:white;padding:16px;font-weight:750;cursor:pointer}
.answer:hover{border-color:var(--accent2)}
.answer.correct{border-color:var(--good);background:#eef9f2}
.answer.wrong{border-color:var(--bad);background:#fff0ec}
.feedback{margin-top:18px;padding:18px;border-radius:18px;background:white;border:1px solid var(--line)}
.feedback.good{border-color:var(--good)}
.feedback.bad{border-color:var(--bad)}
.hidden{display:none}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic-card{background:white;border:1px solid var(--line);border-radius:24px;padding:20px}
.topic-card strong{font-size:1.1rem}
.topic-card span{display:block;color:var(--muted);margin-top:8px}
.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.faq-grid div{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:22px}
footer{text-align:center;padding:40px 24px;color:var(--muted)}
@media(max-width:820px){
  .nav{margin-bottom:40px}
  .nav-links{display:none}
  .hero-grid,.controls,.topic-grid,.faq-grid{grid-template-columns:1fr}
  .hero{padding:18px}
  .panel{padding:52px 18px}
  .stat-card{padding:24px}
}