Fragmento de animación de carga de CSS

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HTML

CSS

/* 
css_foundation 
*/
* {
  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;
}

/* Animação da fragmentação de foco */
.loading-element {
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: #F8F8F2;
  border-radius: 50%;
  animation: loading-animation 2s linear infinite;
}

@keyframes loading-animation {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  25% {
    transform: scale(1.2);
    opacity: 0.6;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
.loading-element:before {
  content: '';
  position: absolute;
  width: 50%;
  height: 50%;
  background-color: currentColor;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.loading-element:after {
  content: '';
  position: absolute;
  width: 10%;
  height: 10%;
  background-color: currentColor;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Camadas de fratura de foco */
.frag-1 {
  z-index: 1;
}
.frag-2 {
  z-index: 2;
}
.frag-3 {
  z-index: 3;
}
.frag-1:before {
  content: '';
  position: absolute;
  width: 50%;
  height: 50%;
  background-color: currentColor;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: frag-1-animation 2s linear infinite;
}
.frag-2:before {
  content: '';
  position: absolute;
  width: 10%;
  height: 10%;
  background-color: currentColor;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: frag-2-animation 2s linear infinite;
}
.frag-3:before {
  content: '';
  position: absolute;
  width: 5%;
  height: 5%;
  background-color: currentColor;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: frag-3-animation 2s linear infinite;
}

/* Animações de fraguras */
@keyframes frag-1-animation {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  25% {
    transform: scale(1.2);
    opacity: 0.6;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes frag-2-animation {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  25% {
    transform: scale(1.1);
    opacity: 0.8;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes frag-3-animation {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  25% {
    transform: scale(1.05);
    opacity: 0.9;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}