CSS Animation Layers City Background

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* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: #181818;
  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: 50%;
  width: 100%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.selector       { color: #F92672; } .property       { color: #66D9EF; } .value-number   { color: #AE81FF; } .value-string   { color: #E6DB74; } .value-color    { color: #A6E22E; } .brace          { color: #F8F8F2; } .comment        { color: #75715E; } .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;
}
.layer1 {  
  z-index: 1;
  position: absolute;
   width: 150px; height: 150px;
   animation: flicker 1s infinite;
   background-color: #333;
   border-radius: 50%;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) rotate(0deg);  
  opacity: 0.7;

}
@keyframes flicker {
  0% { opacity: 0.7; }
  50% { opacity: 0.1; }
  100% { opacity: 0.7; } 
}

.layer2 {  
  z-index: 2;
  position: absolute; 
  width: 200px; height: 200px;
  animation: blurShift 2s infinite; 
  background-color: #444;
   clip-path: circle(50% at 10% 10%);

top: 50%; left: 50%;
  transform: translate(-50%, -50%) rotate(-30deg);
} 
@keyframes blurShift {
  0% { filter: blur(0px);transform: rotate(-30deg);  }
  25% { filter: blur(10px);transform: rotate(-45deg); }
  50% { filter: blur(0px);transform: rotate(-30deg); }
  75% { filter: blur(5px);transform: rotate(-35deg); }
  100% { filter: blur(0px);transform: rotate(-30deg); }   
}

.layer3 {  
  z-index: 3;
  position: absolute; 
  width: 100%; height: 100%;
  animation: glitchRain 1s infinite;
  background-color: #555;
   clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 0);

top: 0; left: 0;
} 
@keyframes glitchRain {
  0% {transform:matrix(1,0,0,1,0,0); }
  25% {transform:matrix(1.05,0,0,1,10,10);  }  
  50% {transform:matrix(1,0,0,1,0,0); }  
  75% {transform:matrix(0.95,0,0,1,0,0); }  
  100% {transform:matrix(1,0,0,1,0,0); }   
   
}

/*Animação da cidade a distância com "efeito de borrão" */
.city { /* define a classe de animacao para a "cidade" */
 
    position: absolute; /* define a posição como absoluta */
    left: 0; /* define a posição inicial na esquerda */
    width: 100%;
    background-color: #fafafa;
    filter: blur(5px); /* adiciona um efeito de blur */
    z-index: 4; /* define a ordem de sobreposição (a cidade está acima das camadas anteriores)*/
 }
@media (min-width: 375px){
.city{ /* Define as regras para telas a partir de 375px */
  height: 100%;
  transform: translateX(-100vw); /* Posicione o fundo da cidade fora da tela */
  animation: cityscapeFade 10s linear infinite; /* Adiciona uma animação de deslocamento da cidade */
} 
@keyframes cityscapeFade {

0% { opacity: 0.8; transform: translateX(0); } /* Transformação inicial */
  50% { opacity: 0.5; transform: translateX(-100%); } /* Transformação no meio da animação */
  100% { opacity: 0.8; transform: translateX(0); } /* Transformação final */
} }

.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: 50%;
  width: 100%; 
  box-shadow: 0 4px 12px rgb(0 0 0 / 0.3); 
}
.selector       { color: #F92672; } .property       { color: #66D9EF; } .value-number   { color: #AE81FF; } .value-string   { color: #E6DB74; } .value-color    { color: #A6E22E; } .brace          { color: #F8F8F2; } .comment        { color: #75715E; } .function       { color: #A6E22E; }      
.animation-container 
{  position: absolute; 
}

CSS Animation Layers City Background

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