Webleb - fragmentos de código - Pestaña sobrecargada

HTML

CSS

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: #000;
  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: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 50%;
  overflow: hidden;
  background-color: #000;
}

.tab {
  position: absolute;
  width: 80px;
  height: 40px;
  background-color: #333;
  border-radius: 8px;
  transform-origin: center;
  animation: tabPulse 1s infinite alternate;
  
}
@keyframes tabPulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.tab:nth-child(1) {
  left: 10%;
  top: 10%;
  animation-delay: 0s;
}
.tab:nth-child(2) {
  left: 30%;
  top: 10%;
  animation-delay: 0.2s;
}
.tab:nth-child(3) {
  left: 50%;
  top: 10%;
  animation-delay: 0.4s;
}
.tab:nth-child(4) {
  left: 70%;
  top: 10%;
  animation-delay: 0.6s;
}

JS