.Nav {
  overflow-y: scroll;
  background: #264653;
}

.Nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.Nav-menuItem {
  padding: 0;
  margin: 0;
}

.Nav-menuItemLink {
  padding: 0.5em 1em;
  color: #fff;
  display: block;
  text-decoration: none;
  white-space: nowrap;
  font-size: 16px;
  font-weight: 300;
  opacity: 0.54;
}

.Nav-menuItemLink--active,
.Nav-menuItemLink:hover {
  background: #6c93ad;

}

.Nav-menuItemLink--active {
  opacity: 1;
}

.Nav-menuHeading {
  padding: 0.5em 1em;
  text-transform: uppercase;
  font-size:110%;
  color: #6c93ad;
  display: block;
  text-decoration: none;
  white-space: nowrap;
}

.Nav-brand {
  display: block;
  background-repeat: no-repeat;
  background-image: url('../../images/logo.svg');
  width: 160px;
  height: 41px;
  text-indent: -9999px;
  margin: 1em;
}

.Nav {
  overflow-y: scroll;
  background: #264653;
}

.Nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

.Nav-menuItem {
  padding: 0;
  margin: 0;
}

.Nav-menuItemLink {
  padding: 0.5em 1em;
  color: #fff;
  display: block;
  text-decoration: none;
  white-space: nowrap;
  font-size: 16px;
  font-weight: 300;
  opacity: 0.54;
}

.Nav-menuItemLink--active,
.Nav-menuItemLink:hover {
  background: #6c93ad;

}

.Nav-menuItemLink--active {
  opacity: 1;
}

.Nav-menuHeading {
  padding: 1.25em 1em 0.25em 1em;
  text-transform: uppercase;
  font-size:110%;
  color: #6c93ad;
  display: block;
  text-decoration: none;
  white-space: nowrap;
}

.Nav-brand {
  display: block;
  background-repeat: no-repeat;
  background-image: url('../../images/logo.svg');
  width: 160px;
  height: 41px;
  text-indent: -9999px;
  margin: 1em;
}

Increase padding on navigation headers
Increase padding on navigation headers
