CSS perfect dark shadow

.dark-shadow {
  box-shadow: 0px 0px 0px 1px rgba(165, 165 165, 0.04),
              -9px 9px 9px -0.5px rgba(0, 0, 0, 0.04),
              -18px 18px 18px -1.5px rgba(0, 0, 0, 0.08),
              -37px 37px 37px -3px rgba(0, 0, 0, 0.16),
              -75px 75px 75px -6px rgba(0, 0, 0, 0.24),
              -150px 150px 150px -12px rgba(0, 0, 0, 0.48)
}