.math-demo {
  --base-unit: 10px;
  --columns: 3;
  --gap: calc(var(--base-unit) * 1.5);
}

.spacing-scale {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap);
  margin: 20px 0;
}

.spacing-item {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  font-weight: bold;
  font-size: 12px;
  min-height: 40px;
}

.spacing-item:nth-child(1) { padding: calc(var(--base-unit) * 0.5); flex: 1; }
.spacing-item:nth-child(2) { padding: calc(var(--base-unit) * 1); flex: 1; }
.spacing-item:nth-child(3) { padding: calc(var(--base-unit) * 1.5); flex: 1; }
.spacing-item:nth-child(4) { padding: calc(var(--base-unit) * 2); flex: 1; }
.spacing-item:nth-child(5) { padding: calc(var(--base-unit) * 3); flex: 1; }

.dynamic-grid {
  display: grid;
  grid-template-columns: repeat(var(--columns), 1fr);
  gap: var(--gap);
  margin: 20px 0;
}

.grid-item {
  background: linear-gradient(45deg, #ff9a9e 0%, #fecfef 100%);
  padding: calc(var(--base-unit) * 2);
  border-radius: 6px;
  text-align: center;
  font-weight: bold;
  color: #333;
}

.controls {
  margin: 20px 0;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 6px;
}

.control-group {
  margin: 10px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.control-group label {
  font-weight: bold;
  min-width: 120px;
}

.control-group input {
  padding: 5px 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
}