@keyframes air-float { 0% { transform: translateY(0px) rotate(0deg); } 50% { transform: translateY(-15px) rotate(1.5deg);  } 100% { transform: translateY(0px) rotate(0deg); } }  .ayn-404-float { animation: air-float 6s ease-in-out infinite; filter: drop-shadow(0 10px 15px rgba(0,0,0,0.1));  will-change: transform;  } html { scroll-behavior: smooth; }