8-Bit

.btn-eight-bit {
  display: inline-block;
  padding: 12px 22px;
  border: 4px solid #000000;
  border-radius: 0;
  background: #ef4444;
  color: #ffffff;
  font-family: "Courier New", monospace;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: inset -4px -4px 0 rgba(0, 0, 0, 0.35), inset 4px 4px 0 rgba(255, 255, 255, 0.3);
  transition: filter 0.1s ease;
}
.btn-eight-bit:hover {
  filter: brightness(1.1);
}
.btn-eight-bit:active {
  box-shadow: inset 4px 4px 0 rgba(0, 0, 0, 0.35), inset -4px -4px 0 rgba(255, 255, 255, 0.2);
  transform: translate(2px, 2px);
}