:root{
  --bg:#f6f7fb;
  --ink:#1b1f23;
  --ink-soft:#6b7280;
  --line:#dde1e7;
  --brand:#3a5bd9;
  --correct:#2f7d6b;
  --wrong:#c0392b;
  --card-bg:#ffffff;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  display:flex;
  flex-direction:column;
  align-items:center;
  min-height:100vh;
}
.topbar{
  width:100%;max-width:520px;display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;border-bottom:1px solid var(--line);
}
.logo{margin:0;font-size:1.15rem;letter-spacing:.04em;font-weight:800;display:flex;gap:6px;align-items:baseline}
.logo .or{font-size:.75rem;font-weight:600;color:var(--brand);text-transform:lowercase}
.icon-btn{
  background:none;border:1px solid var(--line);border-radius:8px;width:36px;height:36px;
  font-size:1.1rem;cursor:pointer;color:var(--ink)
}
.ad-slot{
  width:100%;max-width:520px;margin:10px auto 0;padding:14px;text-align:center;
  border:1px dashed var(--line);border-radius:8px;color:var(--ink-soft);font-size:.78rem
}
.game-wrap{width:100%;max-width:520px;display:flex;flex-direction:column;align-items:center;padding:16px 14px 24px}
.category-banner{
  background:var(--brand);color:#fff;padding:8px 16px;border-radius:20px;font-size:.85rem;
  font-weight:700;margin-bottom:14px;text-align:center
}
.hub-wrap{width:100%;max-width:520px;display:flex;flex-direction:column;align-items:center;padding:20px 14px 30px}
.hub-lead{color:var(--ink-soft);font-size:.9rem;text-align:center;margin:0 0 18px}
.category-grid{display:grid;grid-template-columns:1fr;gap:12px;width:100%}
.category-card{
  display:flex;align-items:center;gap:14px;background:var(--card-bg);border:2px solid var(--line);
  border-radius:14px;padding:16px 18px;cursor:pointer;text-align:left;width:100%;font:inherit;color:inherit
}
.category-card:hover{border-color:var(--brand)}
.category-card.done{border-color:var(--correct);background:#eef7f3}
.category-card .cat-icon{font-size:1.8rem;flex-shrink:0}
.category-card .cat-text{flex:1;min-width:0}
.category-card .cat-topic{font-weight:800;font-size:1rem}
.category-card .cat-stat{font-size:.8rem;color:var(--ink-soft)}
.category-card .cat-status{
  font-size:.78rem;font-weight:700;padding:4px 10px;border-radius:12px;background:var(--brand);color:#fff;
  flex-shrink:0;white-space:nowrap
}
.category-card.done .cat-status{background:var(--correct)}
.category-card.failed .cat-status{background:var(--wrong)}
.back-link{
  align-self:flex-start;background:none;border:none;color:var(--brand);font-weight:700;font-size:.9rem;
  cursor:pointer;padding:0;margin-bottom:14px
}
.score-row{display:flex;gap:10px;margin-bottom:16px;font-size:.85rem;color:var(--ink-soft)}
.score-box,.round-box{background:#fff;border:1px solid var(--line);padding:6px 14px;border-radius:8px}
.cards{display:flex;flex-direction:column;gap:0;width:100%;max-width:340px}
.card{
  background:var(--card-bg);border:2px solid var(--line);border-radius:14px;padding:22px 18px;
  text-align:center;transition:border-color .3s, background-color .3s
}
.card.correct{border-color:var(--correct);background:#eef7f3}
.card.wrong{border-color:var(--wrong);background:#fbecea}
.flag{font-size:2.6rem;line-height:1}
.country-name{font-size:1.15rem;font-weight:700;margin:8px 0 4px}
.value{font-size:1.4rem;font-weight:800;color:var(--brand)}
.value.hidden{color:var(--ink-soft);font-size:1.6rem}
.vs{text-align:center;font-weight:800;color:var(--ink-soft);font-size:.85rem;margin:8px 0}
.buttons{display:flex;gap:10px;margin-top:14px}
.guess-btn{
  flex:1;padding:12px 0;border:none;border-radius:10px;font-weight:700;font-size:.95rem;
  cursor:pointer;color:#fff
}
.guess-btn.higher{background:var(--correct)}
.guess-btn.lower{background:var(--wrong)}
.guess-btn:active{opacity:.75}
.guess-btn:disabled{opacity:.4;cursor:default}
.message{
  min-height:24px;font-weight:700;font-size:.95rem;margin-top:16px;text-align:center;
  background:var(--ink);color:#fff;padding:8px 16px;border-radius:8px;opacity:0;transition:opacity .2s
}
.message.show{opacity:1}

.modal-overlay{
  display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:50;
  align-items:center;justify-content:center;padding:16px
}
.modal-overlay.show{display:flex}
.modal{
  background:#fff;border-radius:12px;padding:24px 22px;max-width:420px;width:100%;
  position:relative;max-height:85vh;overflow-y:auto
}
.modal h2{margin-top:0}
.modal p{color:var(--ink-soft);font-size:.92rem;line-height:1.5}
.modal .fine-print{font-size:.8rem}
.modal-close{
  position:absolute;top:14px;right:14px;background:none;border:none;font-size:1.4rem;
  cursor:pointer;color:var(--ink-soft)
}
.stats-grid{display:flex;gap:10px;text-align:center;margin:16px 0}
.stat{flex:1}
.stat-num{font-size:1.8rem;font-weight:800}
.stat-label{font-size:.72rem;color:var(--ink-soft)}
.next-wrap{text-align:center;border-top:1px solid var(--line);padding-top:16px}
.next-wrap p{margin:0 0 4px;font-size:.8rem}
.countdown{font-size:1.6rem;font-weight:800;margin-bottom:14px}
.share-btn{
  background:var(--brand);color:#fff;border:none;padding:12px 22px;border-radius:8px;
  font-weight:700;font-size:.95rem;cursor:pointer;width:100%
}
.share-textarea{
  width:100%;min-height:110px;margin:12px 0;padding:10px;border:1px solid var(--line);
  border-radius:8px;font-family:inherit;font-size:.85rem;resize:none;background:#fbfbfc;color:var(--ink)
}
article.copy{max-width:520px;padding:10px 20px;margin-top:10px}
article.copy p{color:var(--ink-soft);font-size:.9rem}
footer.site{padding:20px;color:var(--ink-soft);font-size:.78rem}
footer.site a{color:var(--ink-soft)}