header {
  margin-bottom: 2rem;
}
nav.navbar {
  background-color: #18181b;
  border-bottom: 0.5px solid white;
}

nav.navbar .nav-item .nav-link {
  color: white;
}

/*Hover effect for nav links */
.hover-underline {
  position: relative;
  display: inline-block;
}

.hover-underline::after,
.hover-underline::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, #ff0000, #00ffff);
  bottom: -5px;
  left: 0;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease-out;
}

.hover-underline::before {
  top: -5px;
  transform-origin: left;
}

.hover-underline:hover::after,
.hover-underline:hover::before {
  transform: scaleX(1);
}