.logo-center{
    position: absolute;
    top: 28px;
    margin-left: 44%;
    z-index: 3;
}
.nav {
    padding-top: 6.5vh;
}
.nav a {
  color: white;
  padding: 0.2em 0;
  font-size: 20px;
}
.collapse a {
    width: 220px;
}