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

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

.controls {
  background: #2a2a2a;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.param-group, .strategy-select, .archetype-params {
  background: #333;
  padding: 15px;
  border-radius: 8px;
}

label {
  display: block;
  margin: 10px 0;
}

input, select {
  background: #444;
  color: #fff;
  border: 1px solid #555;
  padding: 5px;
  border-radius: 4px;
  width: 100%;
  max-width: 200px;
}

#chart {
  height: 600px;
  background: #2a2a2a;
  border-radius: 10px;
  padding: 15px;
}