.nav_header {
  padding-left: 0;
  padding-right: 0;
}

hr.title_underline {
  height: 1px;
  border: 0;
  margin: 0;
  padding: 0;
  transform: translateY(46px);
}
nav.navbar {
  align-items: baseline;
  padding-top: 0;
  padding-bottom: 0.8em;
}
a.navbar-brand {
  transform: translateY(15px);
  margin: 0;
  padding: 0;
}
a.navbar-brand > img {
  vertical-align: baseline;
}
ul.navbar-nav {
  margin-left: 30px;
  font-size: 1.2em;
}
button.navbar-toggler {
  align-self: center;
  padding: 0.1em 0.3em;
}
ul.navbar-nav .nav-link {
  text-align: right;
}

nav.navbar:after {
  content: "";
  position: absolute;
  height: 2px;
  bottom: 0;
  left: 0;
  right: 0;
}

li.navbar-item {
  position: relative;
}
.navbar-collapse:not(.show) .dropdown-menu.show:before {
  content: "";
  border: 0.5em solid transparent;
  position: absolute;
  top: -1em;
  left: 0.5em;
}

.navbar-collapse:not(.show):not(.collapsing) .navbar-item.user-menu {
  position: absolute;
  right: 1em;
}
.navbar-collapse:not(.show) .user-menu .dropdown-menu {
  right: 0;
  left: unset;
}
.navbar-collapse:not(.show) .user-menu .dropdown-menu.show:before {
  right: 0.5em;
  left: unset;
}

a.nav-link {
  position: relative;
}
a.nav-link:hover:after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 7px;
  height: 1px;
}

/* THEME */
.nav_header {
  background-image: linear-gradient(
    to right,
    transparent,
    rgba(240, 240, 255, 0.5) 5%,
    rgba(240, 240, 255, 0.5) 95%,
    transparent
  );
}
hr.title_underline {
  background-image:
    linear-gradient(to right, transparent, rgba(0, 0, 0, 0.6) 4.5em, rgba(0, 0, 0, 0.6) 50%, transparent 50%),
    linear-gradient(to left, transparent, rgba(0, 0, 0, 0.6) 4.5em, rgba(0, 0, 0, 0.6) 50%, transparent 50%);
}
nav.navbar:after {
  background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 0, 0, 0.2), transparent 70%);
}
.navbar-collapse:not(.show) .dropdown-menu.show:before {
  border-bottom-color: rgba(0, 0, 0, 0.2);
}
a.nav-link:hover:after {
  background-image: linear-gradient(to right, transparent, black, transparent);
}