:root {
  --elevation-1: 
    0px 2px 4px rgba(0, 0, 0, 0.1),
    0px 0px 4px rgba(0, 0, 0, 0.05);
  --elevation-2: 0px 2px 8px rgba(0, 0, 0, 0.15);
  --elevation-3: 0px 8px 18px rgba(0, 0, 0, 0.2);
  --elevation-4: 0px 4px 8px rgba(0, 0, 0, 0.4);
}