body {
  justify-content: flex-start;
}

#links {
  list-style: decimal-leading-zero;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

#links li {
  padding: 0.3rem 0;
}

/* underline effect */
#links li a {
  position: relative;
  display: inline-block;
  text-decoration: none;
  color: inherit;
  padding-bottom: 2px;
  font-weight: bold;
}

#links li a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: currentColor;
  transition: width 0.3s ease;
}

#links li a:hover::after {
  width: 100%;
}