.keycap {
  position: relative;
  display: inline-block;
  width: 130px;
  height: 80px;
  border-radius: 10px;
  background: linear-gradient(180deg, #282828, #202020);
  box-shadow:
    inset -8px 0 8px rgba(0, 0, 0, 0.15),
    inset 0 -8px 8px rgba(0, 0, 0, 0.25),
    0 0 0 2px rgba(0, 0, 0, 0.75),
    10px 20px 25px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  transition:
    transform 0.1s ease-in-out,
    box-shadow 0.1s ease-in;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.keycap .letter {
  position: absolute;
  left: 12px;
  top: 12px;
  color: #e9e9e9;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.1s ease-in-out;
}

.keycap .enter-icon {
  width: 20px;
  height: 20px;
  stroke: #e9e9e9;
}

.keycap::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 4px;
  bottom: 14px;
  right: 12px;
  background: linear-gradient(90deg, #232323, #4a4a4a);
  border-radius: 10px;
  box-shadow:
    -10px -10px 10px rgba(255, 255, 255, 0.25),
    10px 5px 10px rgba(0, 0, 0, 0.15);
  border-left: 1px solid #0004;
  border-bottom: 1px solid #0004;
  border-top: 1px solid #0009;
  transition: all 0.1s ease-in-out;
}

.keycap:active {
  transform: translateY(2px);
  box-shadow:
    inset -4px 0 4px rgba(0, 0, 0, 0.1),
    inset 0 -4px 4px rgba(0, 0, 0, 0.15),
    0 0 0 2px rgba(0, 0, 0, 0.5),
    5px 10px 15px rgba(0, 0, 0, 0.3);
}

.keycap:active::before {
  top: 5px;
  left: 5px;
  bottom: 11px;
  right: 11px;
  box-shadow:
    -5px -5px 5px rgba(255, 255, 255, 0.15),
    5px 3px 5px rgba(0, 0, 0, 0.1);
}

.keycap:active .letter {
  transform: translateY(1px);
}