body {
  margin: 0;
  padding: 2rem;
  font-family: 'Segoe UI', sans-serif;
  background: #1a1a1a;
  color: #e0e0e0;
}

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

h1 {
  text-align: center;
  color: #4CAF50;
  margin-bottom: 2rem;
}

.controls {
  background: #2a2a2a;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.param-group {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.param-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

input[type="number"] {
  width: 100px;
  padding: 0.3rem;
  background: #333;
  border: 1px solid #444;
  color: white;
  border-radius: 4px;
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s;
}

button:hover {
  transform: scale(1.05);
}

.strategy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.strategy-card {
  background: #333;
  padding: 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.strategy-card.selected {
  border-color: #4CAF50;
  background: #335533;
}

.chart-container {
  background: #2a2a2a;
  padding: 1rem;
  border-radius: 8px;
}