Extrait d'animation de chargement CSS

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

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

.codigo {
      position: absolute;
      top: 0;
      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%;
      top:15%;
      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; }

.animation-container {
      position: absolute;
      top: 75%;
      left: 50%;
      transform: translate(-50%, -50%);
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      height: 50%;
      overflow: hidden;
      background: transparent;
    }

/* layers */
    .loading-element {
      /* cor principal do fundo */
      background: #f0f0f0;
      /* tamanhos base */
      width: 5vw;
      height: 5vh;
      /* efeitos */
      aspect-ratio: 9/16;
      border-radius: 50%;
      animation: loading-animation 1s linear infinite;
    }

@keyframes loading-animation {
      to {
        transform: rotateZ(360deg);
        box-shadow: -5vw 5vh 10vw rgba(0, 0, 0, 0.5);
      }
    }

/* micro detalhes */
    @keyframes loading-animation-infinite {
      from {
        box-shadow: -5vw 5vh 10vw rgba(0, 0, 0, 0.5);
      }
      to {
        box-shadow: -5vw 5vh 20vw rgba(0, 0, 0, 0.5);
      }
    }

.loading-element::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 0;
      height: 0;
      border-style: solid;
      border-color: transparent transparent transparent rgba(0, 0, 0, 0.5);
      border-width: 2vh 2vh 2vh 0;
      animation: loading-animation-infinite 1s linear infinite;
    }

/* interdependente */
    @keyframes moving-ripple {
      from {
        transform: translateX(-5vw);
      }
      to {
        transform: translateX(5vw);
      }
    }

.moving-ripple {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 5vw;
      height: 5vh;
      background: rgba(0, 0, 0, 0.5);
      border-radius: 50%;
      animation: moving-ripple 2s linear infinite;
    }

.moving-ripple::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 5vw;
      height: 5vh;
      background: rgba(0, 0, 0, 0.5);
      border-radius: 50%;
      animation: moving-ripple 2s linear infinite;
    }

/* cores e efeitos */
    .loading-element:hover {
      background: rgba(255, 255, 255, 0.5);
      box-shadow: 0 0 5vw rgba(0, 0, 0, 0.5);
    }

.loading-element:hover::after {
      border-width: 2vh 6vh 2vh 0;
    }

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