.cloud-quiz{
  --cq-accent:#0ea5a4;
  --cq-ink:#1f2937;
  --cq-muted:#6b7280;
  --cq-line:#e5e7eb;
  --cq-soft:#f8fafc;
  max-width:720px;margin:32px auto;padding:28px;
  background:#fff;border:1px solid var(--cq-line);border-radius:16px;
  box-shadow:0 10px 30px rgba(2,6,23,.06);
  font-family:inherit;color:var(--cq-ink);
}
.cloud-quiz *{box-sizing:border-box}
.cq-head{text-align:center;margin-bottom:18px}
.cq-title{margin:0 0 6px;font-size:1.6rem;line-height:1.2;color:var(--cq-ink)}
.cq-sub{margin:0;color:var(--cq-muted);font-size:1rem}
.cq-progress{height:8px;background:var(--cq-line);border-radius:99px;overflow:hidden;margin:8px 0 6px}
.cq-bar{height:100%;width:0;background:var(--cq-accent);border-radius:99px;transition:width .35s ease}
.cq-meta{display:flex;justify-content:flex-end;margin-bottom:14px}
.cq-count{font-size:.82rem;color:var(--cq-muted);font-weight:600}
.cq-q{font-size:1.22rem;font-weight:600;margin:6px 0 18px;text-align:center;line-height:1.35}
.cq-options{display:grid;gap:12px}
.cq-opt{
  text-align:left;width:100%;background:var(--cq-soft);border:1.5px solid var(--cq-line);
  border-radius:12px;padding:15px 16px;cursor:pointer;font-size:1rem;color:var(--cq-ink);
  transition:border-color .18s,background .18s,transform .08s;font-weight:500;
}
.cq-opt:hover{border-color:var(--cq-accent);background:#fff}
.cq-opt:active{transform:scale(.99)}
.cq-opt:focus-visible{outline:3px solid color-mix(in srgb,var(--cq-accent) 35%,transparent);outline-offset:2px}
.cq-opt.correct{border-color:#16a34a;background:#f0fdf4}
.cq-opt.wrong{border-color:#dc2626;background:#fef2f2}
.cq-nav{margin-top:16px}
.cq-back{background:none;border:none;color:var(--cq-muted);cursor:pointer;font-size:.92rem;padding:6px 2px}
.cq-back:hover{color:var(--cq-accent)}
.cq-result{text-align:center;animation:cqIn .4s ease}
.cq-result h3{font-size:1.5rem;margin:4px 0 10px;color:var(--cq-accent)}
.cq-result .cq-desc{font-size:1.05rem;line-height:1.6;color:var(--cq-ink);margin:0 auto 18px;max-width:560px}
.cq-score{font-size:2.4rem;font-weight:800;color:var(--cq-accent);margin:6px 0}
.cq-links{list-style:none;padding:0;margin:16px auto 0;max-width:520px;text-align:left}
.cq-links li{margin:8px 0}
.cq-links a{color:var(--cq-accent);text-decoration:none;font-weight:600;border-bottom:1px solid transparent}
.cq-links a:hover{border-bottom-color:var(--cq-accent)}
.cq-actions{display:flex;gap:10px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.cq-btn{border:none;border-radius:10px;padding:11px 18px;cursor:pointer;font-weight:600;font-size:.95rem}
.cq-btn-primary{background:var(--cq-accent);color:#fff}
.cq-btn-ghost{background:var(--cq-soft);color:var(--cq-ink);border:1.5px solid var(--cq-line)}
.cq-btn:hover{filter:brightness(.96)}
@keyframes cqIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@media(max-width:600px){.cloud-quiz{padding:20px;margin:20px auto}.cq-title{font-size:1.35rem}.cq-q{font-size:1.08rem}}