:root{
  --bg:#f4f6f8;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --primary:#2563eb;
  --primaryText:#ffffff;
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
}

header{
  position:sticky;
  top:0;
  z-index:10;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 14px;
  background:#0b1220;
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,0.08);
}

.brand{ display:flex; align-items:center; gap:10px; }
.logo{ font-size:22px; }
.title{ font-weight:800; letter-spacing:0.2px; }
.subtitle{ font-size:12px; opacity:0.75; }

main{ max-width:860px; margin:0 auto; padding:14px; }

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  box-shadow:0 1px 0 rgba(15,23,42,0.04);
  margin-bottom:14px;
}

.hidden{ display:none; }

h2{ margin:0 0 10px 0; font-size:18px; }

.muted{ color:var(--muted); }
.small{ font-size:12px; }

.row{ display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.space{ justify-content:space-between; }

.grid{
  display:grid;
  gap:12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media(max-width:700px){
  .grid{ grid-template-columns: 1fr; }
}

.tile{
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px;
}
.tileTitle{ font-weight:800; margin-bottom:6px; }
.tileBody{ font-size:13px; margin-bottom:10px; }

.btn{
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  padding:10px 12px;
  border-radius:12px;
  font-weight:700;
  cursor:pointer;
}
.btn.primary{
  background:var(--primary);
  border-color:var(--primary);
  color:var(--primaryText);
}
.btn:active{ transform:translateY(1px); }

.pill{
  font-size:12px;
  padding:6px 10px;
  border-radius:999px;
  background:rgba(255,255,255,0.12);
  border:1px solid rgba(255,255,255,0.18);
}

.situation{
  padding:12px;
  border-radius:14px;
  background:#f8fafc;
  border:1px solid var(--border);
  line-height:1.35;
  font-size:15px;
}

.q{
  margin-top:12px;
  padding:12px;
  border-radius:14px;
  border:1px solid var(--border);
}
.qTitle{ font-weight:800; margin-bottom:8px; }
.opt{ display:flex; gap:10px; align-items:flex-start; padding:8px 0; }
.opt input{ margin-top:2px; }
textarea, select{
  width:100%;
  margin-top:6px;
  padding:10px 10px;
  border:1px solid var(--border);
  border-radius:12px;
  font-size:14px;
  background:#fff;
}
.label{ display:block; margin-top:10px; font-weight:800; font-size:13px; }
hr{ border:none; border-top:1px solid var(--border); margin:12px 0; }

.appealBox{
  margin-top:12px;
  border:1px dashed var(--border);
  border-radius:14px;
  padding:12px;
}
.appealBox summary{ cursor:pointer; }

.badge{
  display:inline-block;
  font-size:12px;
  padding:4px 8px;
  border-radius:999px;
  border:1px solid var(--border);
  background:#fff;
  margin-right:6px;
}
/* ---- UI polish (v1.0 stable) ---- */
header{
  background: linear-gradient(90deg, #0b1220, #111827);
}
.card{
  box-shadow: 0 10px 30px rgba(15,23,42,0.06);
}
.btn{
  transition: transform 0.05s ease, box-shadow 0.15s ease;
}
.btn:hover{ box-shadow: 0 6px 18px rgba(15,23,42,0.10); }
.btn:active{ transform: translateY(1px); box-shadow:none; }

/* Print styles */
.printOnly{ display:none; }
@media print{
  header, footer, .row button, #homeCard .row, #btnExitExam, #btnSkip, #btnSubmit, #btnNext, #btnReview, #btnBackToGame{ display:none !important; }
  body{ background:#fff; }
  main{ max-width: 100%; padding: 0; }
  .card{ border:none; box-shadow:none; margin:0; padding:0; }
  .printOnly{ display:block; }
  .q, .situation{ border:1px solid #e5e7eb; }
}

.homeActions{display:flex;gap:10px;flex-wrap:wrap;}