@keyframes fall {
    from { transform: translateY(-60px); }
    to   { transform: translateY(110vh); }
}

@keyframes sway {
    0%   { transform: translateX(0); }
    50%  { transform: translateX(var(--wind)); }
    100% { transform: translateX(0); }
}

@keyframes fade-out {
    to { opacity: 0; }
}