CSS钢琴键盘

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html

css

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html

css

*, *::before, *::after {
  padding: 0;
  margin: 0 auto;
  box-sizing: border-box;
  transform-style: preserve-3d;
}

body {
  background-color: #345;
  color: #fff;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 40px;
  perspective: 35em;
}

.keyboard {
  position: relative;
  transform: rotateX(60deg);
  cursor: pointer;
}

.key > * {
  position: absolute;
}
.key::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 0.5em;
  height: 0.5em;
  transform: translateX(-50%) rotateX(120deg) translateY(0.25em);
  -webkit-clip-path: polygon(25% 100%, 75% 100%, 75% 50%, 100% 50%, 50% 0, 0 50%, 25% 50%);
          clip-path: polygon(25% 100%, 75% 100%, 75% 50%, 100% 50%, 50% 0, 0 50%, 25% 50%);
  transform-origin: top;
  transition: opacity 0.2s;
  opacity: 0;
}

.white {
  position: absolute;
  width: calc(1em - 1px);
  height: 5em;
  background-image: linear-gradient(#eee, #fff);
  transform-origin: top;
  transition: all 0.2s;
}
.white:hover {
  transform: rotateX(-4.2deg);
}
.white:hover::after {
  opacity: 1;
  background-color: #fff7;
}
.white .front {
  width: 100%;
  height: 0.75em;
  top: 100%;
  background-color: #eee;
  background-image: linear-gradient(#fff, #aaa);
  transform: rotateX(-90deg);
  transform-origin: top;
}
.white .left {
  width: 0.75em;
  height: 100%;
  background-image: linear-gradient(90deg, #888, #444);
  transform: rotateY(90deg);
  transform-origin: left;
}
.white .right {
  width: 0.75em;
  height: 100%;
  right: 0;
  background-image: linear-gradient(90deg, #444, #888);
  transform: rotateY(-90deg);
  transform-origin: right;
}

.black {
  position: absolute;
  width: calc(0.5em - 1px);
  height: 3em;
  background-image: linear-gradient(#333, #111);
  transform: translateZ(0.25em);
  transform-origin: top;
  transition: transform 0.2s;
}
.black:hover {
  transform: translateZ(0.25em) rotateX(-4.2deg);
}
.black:hover::after {
  opacity: 1;
  background-color: #0007;
}
.black .front {
  width: 100%;
  height: 1.4em;
  top: 100%;
  background-color: #f00;
  background-image: linear-gradient(#333, #000);
  transform: rotateX(-45deg);
  transform-origin: top;
}
.black .left {
  width: 1em;
  height: calc(100% + 1em);
  background-image: linear-gradient(90deg, #222, #000);
  transform: rotateY(90deg);
  transform-origin: left;
  -webkit-clip-path: polygon(0 0, 0 3em, 100% 100%, 100% 0);
          clip-path: polygon(0 0, 0 3em, 100% 100%, 100% 0);
}
.black .right {
  width: 1em;
  height: calc(100% + 1em);
  right: 0;
  background-image: linear-gradient(90deg, #000, #222);
  transform: rotateY(-90deg);
  transform-origin: right;
  -webkit-clip-path: polygon(0 0, 0 100%, 100% 3em, 100% 0);
          clip-path: polygon(0 0, 0 100%, 100% 3em, 100% 0);
}

.C {
  left: calc(var(--leftOffset) + 0em);
}

.Db {
  left: calc(var(--leftOffset) + 0.75em);
}

.D {
  left: calc(var(--leftOffset) + 1em);
}

.Eb {
  left: calc(var(--leftOffset) + 1.75em);
}

.E {
  left: calc(var(--leftOffset) + 2em);
}

.F {
  left: calc(var(--leftOffset) + 3em);
}

.Gb {
  left: calc(var(--leftOffset) + 3.75em);
}

.G {
  left: calc(var(--leftOffset) + 4em);
}

.Ab {
  left: calc(var(--leftOffset) + 4.75em);
}

.A {
  left: calc(var(--leftOffset) + 5em);
}

.Bb {
  left: calc(var(--leftOffset) + 5.75em);
}

.B {
  left: calc(var(--leftOffset) + 6em);
}

.octave1 {
  --leftOffset: -10.5em;
}

.octave2 {
  --leftOffset: -3.5em;
}

.octave3 {
  --leftOffset: 3.5em;
}

JavaScript

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