Nav Underline Slide

Underline draws under each nav link on hover.

.nav-slide { display:flex; gap:24px; position:relative; }
.nav-slide a { color:#999; text-decoration:none; padding-bottom:4px; transition:color 0.2s; }
.nav-slide a:hover { color:white; }
.nav-slide a::after { content:""; display:block; width:0; height:2px; background:#8b5cf6; transition:width 0.2s; }
.nav-slide a:hover::after { width:100%; }