.main-header {
  width:100%;
  background:#111;
  padding:16px 40px;
  display:flex;
  justify-content:center;
}

.nav {
  display:flex;
  gap:28px;
}

.nav a{
  color:#fff;
  text-decoration:none;
  font-size:15px;
  font-weight:500;
  opacity:.9;
}

.nav a:hover{
  opacity:1;
}

body{
  margin:0;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial;
}