.responsive-demo {
  --demo-columns: 1;
  --demo-gap: 1rem;
  --demo-padding: 12px;
  --demo-font-size: 1rem;
}

@media (min-width: 600px) {
  .responsive-demo {
    --demo-columns: 2;
    --demo-gap: 1.5rem;
    --demo-padding: 16px;
    --demo-font-size: 1.1rem;
  }
}

@media (min-width: 900px) {
  .responsive-demo {
    --demo-columns: 3;
    --demo-gap: 2rem;
    --demo-padding: 20px;
    --demo-font-size: 1.2rem;
  }
}

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

.responsive-card {
  background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
  padding: var(--demo-padding);
  border-radius: 8px;
  text-align: center;
  font-size: var(--demo-font-size);
  font-weight: bold;
  color: #2c3e50;
  transition: all 0.3s ease;
}

.responsive-card:hover {
  transform: scale(1.05);
}

.breakpoint-indicator {
  background: #3498db;
  color: white;
  padding: 10px;
  border-radius: 4px;
  text-align: center;
  font-weight: bold;
  margin: 15px 0;
}

@media (min-width: 600px) {
  .breakpoint-indicator::after {
    content: " - Tablet (600px+)";
  }
}

@media (min-width: 900px) {
  .breakpoint-indicator::after {
    content: " - Desktop (900px+)";
  }
}