Fondo animado CSS con efecto de carga

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Un código de lebdev

HTML

```html
<!DOCTYPE html>
<html lang="pt-BR">
<head>
<style>
  /* Inicialize CSS Foundation */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

body {
    background: url("https://vinixodin.com/thumb.jpg") no-repeat center center;
    background-color: #1c1e24;
    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; }

.codigo>span {
    padding: 5px 10px;
    border-radius: 8px;
  }

.codigo>span.selector {
    background: rgba(0, 0, 0, 0.5);
  }

.codigo>span.property {
    background: rgba(0, 0, 0, 0.25);
  }

.codigo>span.value-number {
    background: rgba(0, 0, 0, 0.1);
  }

.codigo>span.brace {
    padding: 5px 10px;
    font-weight: bold;
  }

.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: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: loading-animation 1s linear infinite;
  }

@keyframes loading-animation {
    0% { transform: scale(1); }

50% { transform: scale(1.5); }

100% { transform: scale(1); }
  }

.bubble1 {
    position: absolute;
    top: 50%;
    left: 0;
    background-color: #3e3e3e;
    width: 50px;
    height: 50px;
    border-radius: 25px;
    animation: bubble1-animation 1s ease-out;
  }

#bubble1 {
    background-color: #3e3e3e;
  }

@keyframes bubble1-animation {
    0% { transform: translateX(0) scale(1); }

40% { transform: translateX(-20px) scale(1.2); }

100% { transform: translateX(-100px) scale(0.8); }
  }

// Nível de detalhe que aparece somente na segunda repetição
  @keyframes bubble2-animation {
    0%, 100% { transform: translateX(0); }

40%, 80% {  transform: translateX(-10px); }
  }

.bubble2 {
    position: absolute;
    top: 50%;
    left: 75%;
    background-color: #3e3e3e;
    width: 30px;
    height: 30px;
    border-radius: 15px;
    animation: bubble2-animation 1s ease-out;
  }

#bubble2 {
    background-color: #8b008b;
  }

.wave1 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #8b008b;
    opacity: 0.5;
    animation: wave1-animation 1s linear infinite;
  }

@keyframes wave1-animation {
    0% {
      transform: translateX(0) scale(1);
      background-color: #8b008b;
    }

50% { opacity: 0.8; }

100% {
      transform: translateX(-100px) scale(1.2);
      background-color: #8b008b;
    }
  }

/* Comentário sobre o detalhe que apenas aparece na segunda execução */
  // A mudança de tonalidade ocorre somente após as duas repetições, criando um efeito de profundidade.

.wave2 {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #3e3e3e;
    opacity: 0.3;
    animation: wave2-animation 1s linear infinite;
  }

@keyframes wave2-animation {
    0% {
      transform: translateX(0) scale(1);
      background-color: #3e3e3e;
    }

50% { opacity: 0.7; background-color: #f5f0dc; }

100% {
      transform: translateX(100px) scale(1.2);
      background-color: #3e3e3e;
    }
  }

.shape {
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 50%;
    background-color: #8b008b;
    opacity: 0.8;
    animation: shape-animation 1s linear infinite;
  }

@keyframes shape-animation {
    0% {
      clip-path: polygon(0 0, 0 100%, 100% 100%, 100% 0);
    }

25% { clip-path: polygon(0 0, 20% 100%, 0 100%, 0 0); }

50% { clip-path: polygon(20% 0, 100% 100%, 80% 0, 0 0); }

75% { clip-path: polygon(0 0, 100% 100%, 80% 0, 0 0); }

100% {
      clip-path: polygon(0 0, 0 100%, 100% 100%, 100% 0);
    }
  }

.codigo {
    /* Adicione um código pronto para a paleta de cores */
    span.selector {
      color: #f0c808; /* Laranja */
      background: rgba(0, 0, 0, 0.5);
    }

span.property {
      background: rgba(0, 0, 0, 0.25);
    }

span.value-number {
      background: rgba(0, 0, 0, 0.1);
    }

span.brace {
      padding: 5px 10px;
      font-weight: bold;
    }
  }

.codigo>span {
    padding: 5px 10px;
    border-radius: 8px;
  }

.codigo>span::before {
    content: '\\25A0 \\25A0';
  }
</style>
<body>

<div class="animation-container">
    <div class="loading-element"></div>
    <div class="bubble1">
      
    </div>
    <div class="bubble2">
      
    </div>
    <div class="wave1">
      
    </div>
    <div class="wave2">
      
    </div>
    <div class="shape">
      
    </div>
  </div>
</body>
</html>
```

CSS

/* 
  Base 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;
  aspect-ratio: 9/16;
}

.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;
  aspect-ratio: 9/16;
}

/* 
  Layers e motivação emocional
*/
.loading-element {
  background-color: #333333;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  animation: loading-animation 1s linear infinite;
  position: relative;
}

@keyframes loading-animation {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1);
  }
}

.layer1 {
  width: 100%;
  height: 100%;
  background-color: #4D4D4D;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 1s;
}

.layer1::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #3F3F3F;
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

/* 
  Micro-detalhes para o replay value
*/
.layer2 {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #3F3F3F;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: detalhe 2s linear infinite;
}

@keyframes detalhe {
  50% {
    transform: scale(1);
    background-color: #666666;
  }
  100% {
    transform: scale(0);
    background-color: #3F3F3F;
  }
}

/* 
  Interações entre camadas e elementos
*/
.layer3 {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #2F2F2F;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: interacao 2s linear infinite;
}

@keyframes interacao {
  50% {
    transform: scale(1);
    background-color: #777777;
  }
  100% {
    transform: scale(0);
    background-color: #2F2F2F;
  }
}