@keyframes wave {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
  }
  
  .plane-animation {
    animation: fly 8s linear infinite;
  }
  
  @keyframes fly {
    0% { transform: translateX(-100px); }
    100% { transform: translateX(calc(100vw + 100px)); }
  }