body {
  font-family: "Inter", sans-serif;
  background: #f9fafb;
  color: #111827;
}
.panel {
  background: #fff;
  border-radius: 0.75rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.04);
}
.choice-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.correct {
  background: #dcfce7 !important;
  border-color: #4ade80 !important;
}
.wrong {
  background: #fee2e2 !important;
  border-color: #f87171 !important;
}
.timer-badge {
  background: #ecfccb;
  color: #365314;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  font-size: 0.9rem;
}
.small-muted {
  font-size: 0.9rem;
  color: #6b7280;
}
.lb-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.5rem;
  border-bottom: 1px solid #f1f5f9;
}
.lb-empty {
  color: #6b7280;
  font-size: 0.95rem;
  padding: 0.75rem;
}
#progressBar {
  width: 100%;
  height: 100%;
}
.choice-btn {
  transition: transform 0.08s ease;
}
.choice-btn:active {
  transform: translateY(1px);
}