.header{position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(25,35,45,.06)}
html{scroll-padding-top:120px}
@media(max-width:720px){html{scroll-padding-top:100px}.nav nav{max-height:calc(100dvh - 82px);overflow-y:auto;overscroll-behavior:contain}}