header {
	padding: var(--sp-XL) var(--sp-M);
}
header img {
	width: 400px;
}
@keyframes pound {
	0% {transform: scale(1);}
	3% {transform: scale(0.8);}
	9% {transform: scale(1.1);}
	12% {transform: scale(1);}
}
#checkbox-navigation:not(:checked) ~ label {
	animation: pound 3s ease 6s infinite;
}