:root{
  --bg:#0b1220;
  --card:#111a2e;
  --text:#e9eefc;
  --muted:#b9c4e6;
  --accent:#66a6ff;
  --danger:#ff6b6b;
  --ok:#33d17a;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  background:linear-gradient(180deg,var(--bg),#060a14);
  color:var(--text);
}

.container{max-width:980px;margin:0 auto;padding:18px}
.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(10,16,32,.92);
  backdrop-filter: blur(6px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.brand-title{font-size:1.25rem;font-weight:800;letter-spacing:.3px}
.brand-subtitle{color:var(--muted);font-size:.95rem;margin-top:2px}
.nav{margin-top:10px;display:flex;gap:14px;flex-wrap:wrap}
.nav a{color:var(--text);text-decoration:none;opacity:.9}
.nav a:hover{opacity:1;color:var(--accent)}

.disclaimer{
  margin:18px 0;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.10);
  padding:14px 14px;
  border-radius:12px;
}
.card{
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  border-radius:14px;
  padding:16px;
  margin:14px 0;
}
h1,h2,h3{margin:.3rem 0 .6rem}
.small{font-size:.92rem;color:var(--muted)}

.btn{
  display:inline-block;
  background:linear-gradient(135deg,var(--accent),#7c5cff);
  color:#0b1220;
  font-weight:800;
  border:none;border-radius:12px;
  padding:10px 14px;
  text-decoration:none;
  cursor:pointer;
}
.btn.secondary{
  background:rgba(255,255,255,.10);
  color:var(--text);
  font-weight:700;
}
.btn:disabled{opacity:.6;cursor:not-allowed}

.quiz-grid{display:grid;gap:12px}
.question{
  background:rgba(0,0,0,.18);
  border:1px solid rgba(255,255,255,.10);
  border-radius:12px;
  padding:14px;
}
.answers label{
  display:block;
  padding:8px 10px;
  margin:6px 0;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.10);
  cursor:pointer;
}
.answers input{margin-right:8px}
.answers label:hover{border-color:rgba(102,166,255,.5)}

.badge{
  display:inline-block;
  padding:4px 10px;
  border-radius:999px;
  font-size:.85rem;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.12);
}
.badge.ok{background:rgba(51,209,122,.15);border-color:rgba(51,209,122,.35)}
.badge.bad{background:rgba(255,107,107,.15);border-color:rgba(255,107,107,.35)}

hr{border:none;border-top:1px solid rgba(255,255,255,.08);margin:14px 0}
.site-footer{margin-top:40px;border-top:1px solid rgba(255,255,255,.08)}
``