Fragmento de animación de carga de CSS

HTML

CSS

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

body {
      background: url("./thumb.jpg") no-repeat center center;
      background-color: black;
      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;
    }

.loading-element {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background-color: #33CC33;
      animation: loading-animation 1s linear infinite;
    }

@keyframes loading-animation {
      0% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
      50% {
        transform: translate(-50%, -50%) scale(1.2);
        border-radius: 25%;
      }
      100% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
    }

.circle {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: #66D9EF;
      animation: circle-animation 2s linear infinite;
    }

@keyframes circle-animation {
      0% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
      50% {
        transform: translate(-50%, -50%) scale(1.2);
        border-radius: 25%;
      }
      100% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
    }

.line {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%) rotate(45deg);
      width: 100px;
      height: 2px;
      background-color: #66D9EF;
      animation: line-animation 2s linear infinite;
    }

@keyframes line-animation {
      0% {
        transform: translate(-50%, -50%) rotate(45deg);
        height: 2px;
      }
      50% {
        transform: translate(-50%, -50%) rotate(45deg);
        height: 4px;
      }
      100% {
        transform: translate(-50%, -50%) rotate(45deg);
        height: 2px;
      }
    }

.dot {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: #66D9EF;
      animation: dot-animation 3s linear infinite;
    }

@keyframes dot-animation {
      0% {
        transform: translate(-50%, -50%) scale(1);
        background-color: #66D9EF;
      }
      50% {
        transform: translate(-50%, -50%) scale(1.2);
        background-color: #33CC33;
      }
      100% {
        transform: translate(-50%, -50%) scale(1);
        background-color: #66D9EF;
      }
    }

.reflection {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background-color: #66D9EF;
      animation: reflection-animation 2s linear infinite;
      pointer-events: none;
    }

@keyframes reflection-animation {
      0% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
      50% {
        transform: translate(-50%, -50%) scale(1.2);
        border-radius: 25%;
      }
      100% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
    }

/* Animacão da sensação de reflexão */
    /* O "reflexo" é uma cópia do circulo de cima */
    /* Quando o circulo está se expandindo o reflexo se contrai e vice-versa */
    .reflexo {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: #66D9EF;
      pointer-events: none;
      /* Comportamento que é a mesma do circulo de cima */
      animation: reflexo-animation 2s linear infinite;
    }

@keyframes reflexo-animation {
      0% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
      50% {
        transform: translate(-50%, -50%) scale(1.2);
        border-radius: 25%;
      }
      100% {
        transform: translate(-50%, -50%) scale(1);
        border-radius: 50%;
      }
    }

/* Animacão que dá a sensação de sensibilidade ao toque */
    /* A animação faz com que o circulo de cima se move em direções opostas no inicio e meio da animacao */
    /* O circulo se expande e se contrai no inicio e meio da animação */
    .circulo {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: #66D9EF;
      pointer-events: none;
      animation: animacao-circulo 2s linear infinite;
    }

@keyframes animacao-circulo {
      0% {
        transform: translate(-50%, -50%) scale(1);
        transform: translate(0, -10px);
      }
      50% {
        transform: translate(-50%, -50%) scale(0.5);
        transform: translate(10px, 0);
      }
      100% {
        transform: translate(-50%, -50%) scale(1);
        transform: translate(0, -10px);
      }
    }

/* Texto de apresentação */
    .presentacao {
      position: absolute;
      top: 10%;
      left: 50%;
      transform: translate(-50%);
      width: 100%;
      height: 20%;
      display: flex;
      justify-content: center;
      font-size: 24px;
      color: #66D9EF;
    }

JS

Fragmento de animación de carga de CSS

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