Exemple de calques d'animation CSS

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HTML

CSS

/* css_foundation block */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

body {
      background: no-repeat fixed center center url("./thumb.jpg");
      background-color: black;
      background-size: cover;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      overflow: hidden;
    }

.codigo {
      position: absolute;
      top: 15%;
      left: 50%;
      transform: translateX(-50%);
      background: #272822;
      color: #F8F8F2;
      font-family: 'Consolas', 'Monaco', monospace;
      font-size: 18px;
      padding: 20px;
      border-radius: 8px;
      white-space: pre-line;
      text-align: left;
      line-height: 1.6;
      max-height: 25%;
      max-width: 75%;
      width: 75%;
      height: 25%;
      overflow-y: hidden;
      box-shadow: -8px 10px 18px rgba(0, 0, 0, 0.55);
    }

.selector       { color: #F92672; }
    .property       { color: #66D9EF; }
    .value-number   { color: #AE81FF; }
    .value-string   { color: #E6DB74; }
    .value-color    { color: #A6E22E; }
    .function       { color: #A6E22E; }

.animacao {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      height: 400px;
      overflow: hidden;
    }

.camada {
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background-color: #fff;
      position: absolute;
      animation: animar-circulos 4s ease-out;
      animation-fill-mode: forwards;
    }

.camada-1 {
      top: 20%;
      left: 60%;
      animation-delay: .5s;
    }

.camada-2 {
      top: 60%;
      left: 10%;
      transform: scale(0.5);
      animation-delay: 1s;
    }

.camada-3 {
      top: 20%;
      left: 20%;
      transform: rotate(45deg);
      animation-delay: .5s;
    }

/* Camada com animação de transição */
    .transicao {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: red;
      position: absolute;
      animation: animar-transicao 4s ease-out;
      animation-fill-mode: forwards;
    }

.transicao-1 {
      top: 40%;
      left: 5%;
      animation-delay: 1s;
    }

.transicao-2 {
      top: 60%;
      left: 50%;
      transform: scale(0.5);
      animation-delay: 1.5s;
    }

.camada:hover { cursor: pointer }

/* CSS da animação */
    @keyframes animar-circulos {
      100% {
        transform: translateX(300%) rotate(180deg);
        opacity: 0;
      }
    }

@keyframes animar-transicao {
      0% {
        transform: translateX(-200%) scale(1);
        opacity: 1;
      }
      100% {
        transform: translateX(200%) scale(4);
        opacity: 0;
      }
    }