:root{
  --bg:#0b2545;
  --panel:#07213a;
  --accent:#ffd700;
  --muted:#9fb3d0;
  --correct:#2ecc71;
  --wrong:#e74c3c;
  --card:#0f3b66;
}
*{box-sizing:border-box;font-family:Inter,Segoe UI,Helvetica,Arial,sans-serif}
body{margin:0;background:linear-gradient(180deg,var(--bg),#041428);color:#e6f0ff;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.app{width:100%;max-width:1100px}
.header{text-align:center;margin-bottom:16px}
.header h1{margin:0;font-size:28px;color:var(--accent);text-shadow:0 2px 8px rgba(0,0,0,0.6)}
.subtitle{margin:4px 0 0;color:var(--muted)}
.main{background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);padding:20px;border-radius:12px;display:block}
.game{display:flex;gap:20px}
.question-area{flex:1;background:var(--card);padding:20px;border-radius:10px;box-shadow:0 8px 30px rgba(0,0,0,0.5)}
.prize{font-weight:600;color:var(--accent);margin-bottom:12px}
.question{font-size:20px;margin-bottom:16px}
.options{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.option-btn{background:linear-gradient(180deg,#123a65,#0f3b66);border:2px solid rgba(255,255,255,0.04);padding:14px;border-radius:8px;color:#eaf6ff;cursor:pointer;font-weight:600;transition:all .18s}
.option-btn:hover{transform:translateY(-3px)}
.option-btn.correct{background:linear-gradient(180deg,#1abc9c,#16a085);border-color:rgba(0,0,0,0.2)}
.option-btn.wrong{background:linear-gradient(180deg,#e74c3c,#c0392b);border-color:rgba(0,0,0,0.2)}
.ladder{width:260px;background:rgba(255,255,255,0.02);padding:12px;border-radius:8px}
.ladder h2{margin:2px 0 8px;color:var(--muted);font-size:14px}
.ladder ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column-reverse;gap:6px}
.ladder li{padding:8px 10px;border-radius:6px;background:transparent;color:var(--muted);display:flex;justify-content:space-between;align-items:center}
.ladder li.current{background:linear-gradient(90deg,rgba(255,215,0,0.12),rgba(255,215,0,0.04));color:var(--accent);font-weight:700}
.controls{margin-top:16px;display:flex;gap:8px}
.btn{background:var(--accent);color:#07213a;padding:10px 14px;border-radius:8px;border:none;cursor:pointer;font-weight:700}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted)}
.footer{text-align:center;margin-top:12px;color:var(--muted)}

@media(max-width:900px){.game{flex-direction:column}.ladder{width:100%}}