/* Base */
*{box-sizing:border-box}
:root{
  --bg:#0b0d10;
  --panel:#101625;
  --panel-2:#0f1422;
  --muted:#aeb6c2;
  --text:#ffffff;
  --accent:#4aa3ff;
  --accent-2:#7bc67b;
  --danger:#ff6b6b;
  --border:#1f2736;
  --shadow:0 12px 40px rgba(0,0,0,.35);
}
html,body{height:100%}
body{
  margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;color:var(--text);
  background:
   radial-gradient(1400px 900px at 10% -20%, #1b2742 0%, transparent 60%),
   radial-gradient(1000px 600px at 110% 0%, #131b30 0%, transparent 60%), var(--bg);
}

/* Header */
.site-header{position:sticky;top:0;z-index:10;background:linear-gradient(180deg,rgba(10,12,16,.85),rgba(10,12,16,.65));backdrop-filter:blur(10px);border-bottom:1px solid var(--border);padding:16px 20px}
.site-header h1{margin:0 0 10px 0;font-size:clamp(20px,2.4vw,28px);letter-spacing:.2px}
.controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.controls label{display:flex;flex-direction:column;gap:6px;font-size:12px;color:var(--muted)}
.controls select,.controls button{appearance:none;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:linear-gradient(180deg,var(--panel),var(--panel-2));color:var(--text);outline:none}
.controls select:focus,.controls button:focus{box-shadow:0 0 0 2px rgba(74,163,255,.25)}
.controls button{cursor:pointer;transition:transform .05s ease,filter .2s ease}
.controls button:hover{filter:brightness(1.08)}
.controls button:active{transform:translateY(1px)}
.controls .primary{border-color:#214d8a;background:linear-gradient(180deg,#1a2a45,#132036)}

/* Layout */
.layout{display:grid;grid-template-columns:1fr 340px;gap:20px;padding:18px}
.card{background:linear-gradient(180deg,rgba(24,31,49,.88),rgba(16,22,36,.92));border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);padding:18px}
.card.hidden{display:none}

.imageWrap{display:flex;justify-content:center;align-items:center;margin:6px auto 14px;padding:12px;background:#0f1320;border:1px dashed #26324c;border-radius:16px}
#signImage{display:block;max-width:38%;border-radius:12px;background:#fff} /* smaller images */

/* Progress */
.progress{position:relative;height:10px;background:#0e1422;border:1px solid var(--border);border-radius:999px;margin:8px 0 12px}
.progress .bar{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),#9fb8ff);border-radius:999px;transition:width .25s ease}
.progress .progress-text{position:absolute;right:8px;top:-22px;font-size:12px;color:var(--muted)}

/* Hint */
.hint summary{cursor:pointer;color:var(--accent)}
.hint p{color:#dde6ff;opacity:.9}

/* Answers */
.response.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.choice{padding:14px 16px;border:1px solid var(--border);background:linear-gradient(180deg,var(--panel),var(--panel-2));color:var(--text);border-radius:14px;cursor:pointer;text-align:left;transition:filter .2s ease,transform .03s ease,border-color .2s ease;font-size:clamp(14px,2vw,16px)}
.choice:hover{filter:brightness(1.06)}
.choice:active{transform:translateY(1px)}
.choice.correct{background:rgba(123,198,123,.15);border-color:#2e7d32}
.choice.wrong{background:rgba(255,107,107,.12);border-color:#c62828}

/* Feedback */
.feedback{margin-top:12px;font-weight:700}
.feedback.ok{color:var(--accent-2)}
.feedback.no{color:var(--danger)}

/* HUD */
.hud{position:sticky;top:88px}
.hud .hud-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px dashed var(--border)}
.hud .hud-row:last-child{border-bottom:0}
.hud span{color:var(--muted)}

/* Modal (Review) */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.45);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:16px}
.modal.hidden{display:none}
.modal-card{width:min(980px,96vw);max-height:86vh;overflow:auto;background:linear-gradient(180deg,rgba(23,29,46,.96),rgba(16,22,36,.98));border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);padding:18px}
.modal-card h2{margin:0 0 8px 0}
.modal-card .muted{color:var(--muted);margin:0 0 12px 0}
.review-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.review-item{display:grid;grid-template-columns:72px 1fr;gap:10px;align-items:center;background:var(--panel-2);border:1px solid var(--border);border-radius:12px;padding:10px}
.review-item img{width:72px;height:72px;object-fit:contain;background:#fff;border-radius:10px}
.badge{display:inline-block;padding:3px 8px;border-radius:999px;font-size:12px;border:1px solid var(--border)}
.badge.ok{background:rgba(123,198,123,.15);border-color:#2e7d32}
.badge.no{background:rgba(255,107,107,.12);border-color:#c62828}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:12px}
.secondary,.primary{appearance:none;padding:10px 14px;border-radius:12px;border:1px solid var(--border);background:linear-gradient(180deg,var(--panel),var(--panel-2));color:var(--text);cursor:pointer}
.primary{border-color:#214d8a;background:linear-gradient(180deg,#1a2a45,#132036)}

/* Confetti canvas */
.confetti{position:fixed;inset:0;pointer-events:none}

/* Footer */
.site-footer{color:var(--muted);text-align:center;padding:14px 10px}

/* Mobile */
@media (max-width: 900px){
  .layout{grid-template-columns:1fr}
  #signImage{max-width:60%} /* smaller on mobile too */
  .response.grid{grid-template-columns:1fr}
  .review-list{grid-template-columns:1fr}
}
@media (max-width: 420px){
  .controls{gap:10px}
  .controls select,.controls button{padding:10px 12px;border-radius:10px}
  .choice{padding:12px 14px;border-radius:12px}
}