#canvas, #canvas * {
  transform-style: preserve-3d;
  box-sizing: border-box;
}
.flex {
  display: flex;
}
.grid {
  display: grid;
}
.space-between {
  justify-content: space-between;
}
.align-end {
  align-items: flex-end;
}
.transition-03s {
  transition: all 0.3s;
}
.transition-2s {
  transition: all 2s;
}
.relative {
  position: relative;
}
.absolute {
  position: absolute;
}
.fixed {
  position: fixed;
}
.parent-fit {
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}
.fluid {
  width: 100%;
}
.full-height {
  height: 100%;
}
.backface-hidden {
  backface-visibility: hidden;
}
.wood {
  background:
    repeating-radial-gradient(
      circle at -1000% 0%,
      rgba(116, 77, 48, 0.7),
      #573216 7.5%,
      rgba(116, 77, 48, 0.9) 10%
    ),
    repeating-radial-gradient(
      circle at -1000% 0%,
      #573216,
      #573216 0.1%,
      #744d30 0.4%,
      #744d30 0.5%
    );
  height: 52px;
  width: 9px;
  margin: 0 8px;
}

kbd {
  background-color: #eee;
  border-radius: 3px;
  border: 1px solid #b4b4b4;
  box-shadow: 0 1px 1px rgba(0, 0, 0, .2), 0 2px 0 0 rgba(255, 255, 255, .7) inset;
  color: #333;
  display: inline-block;
  font-size: .85em;
  font-weight: 700;
  line-height: 1;
  padding: 2px 4px;
  white-space: nowrap;
}