body {
  margin: 0;
  padding: 20px;
  font-family: 'Segoe UI', sans-serif;
  background: #1a1a1a;
  color: #fff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.controls {
  background: #2a2a2a;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.param-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  margin: 15px 0;
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
}

button:hover {
  background: #45a049;
  transform: translateY(-2px);
}

#chart {
  height: 500px;
  background: #2a2a2a;
  border-radius: 8px;
  margin-top: 20px;
}

.legend {
  display: flex;
  gap: 20px;
  margin-top: 15px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.color-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-item[data-strategy="lottery"] .color-dot { background: #ff4757; }
.legend-item[data-strategy="uniform"] .color-dot { background: #2ed573; }
.legend-item[data-strategy="tiered"] .color-dot { background: #3742fa; }
.legend-item[data-strategy="vesting"] .color-dot { background: #ffa502; }