body {
  font-family: Inter, sans-serif;
}
.tool-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 1.25rem;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.04);
}
.score-pill {
  background: #1f2937;
  border-radius: 8px;
  padding: 5px 10px;
  text-align: center;
  min-width: 52px;
}
.score-pill .label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #9ca3af;
  text-transform: uppercase;
}
.score-pill .value {
  font-size: 17px;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
}
.diff-btn {
  border: 1px solid #e5e7eb;
  border-radius: 99px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  background: #fff;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.diff-btn:hover {
  border-color: #6ee7b7;
  color: #065f46;
  background: #f0fdf4;
}
.diff-btn.active {
  border-color: #059669;
  color: #065f46;
  background: #ecfdf5;
}

#light-grid {
  display: grid;
  gap: 8px;
  max-width: 320px;
  margin: 0 auto;
}

.light {
  aspect-ratio: 1;
  border-radius: 10px;
  cursor: pointer;
  border: 3px solid transparent;
  transition:
    background 0.1s,
    box-shadow 0.1s,
    transform 0.08s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.light.on {
  background: #fbbf24;
  box-shadow: 0 0 16px 4px rgba(251, 191, 36, 0.5);
  border-color: #f59e0b;
}
.light.off {
  background: #1f2937;
  box-shadow: none;
  border-color: #374151;
}
.light:active {
  transform: scale(0.9);
}

@keyframes winPulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}
.win-flash {
  animation: winPulse 0.4s ease-in-out 3;
}

#win-banner {
  display: none;
  text-align: center;
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  border-radius: 10px;
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  color: #065f46;
}
#win-banner.show {
  display: block;
}

#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: #1f2937;
  color: #fff;
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 600;
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 0.3s,
    transform 0.3s;
  z-index: 999;
  white-space: nowrap;
}
#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(-8px);
}
.related-game-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 10px 12px;
  text-decoration: none;
  color: inherit;
  transition:
    border-color 0.15s,
    box-shadow 0.15s,
    transform 0.15s;
}
.related-game-card:hover {
  border-color: #6ee7b7;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.07);
  transform: translateY(-1px);
}
.related-icon {
  width: 40px;
  height: 40px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}