::view-transition-old(toast):only-child{animation:.2s ease-out forwards toast-out}::view-transition-new(toast):only-child{animation:.2s ease-out forwards toast-in}::view-transition-group(toast){animation-duration:.3s}@keyframes toast-in{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}@keyframes toast-out{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(100%)}}