#header {
    margin: 0;
}

#title {
    text-align: center;
    font-size: 4rem;
    line-height: 100%;
}

#menus {
    text-align: left;
    padding: 0;
}

.menu {
    display: inline-block;
    margin: 0 1rem 0 0;
}

.menu span {
    position: relative;
}

.menu span::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: #211d1e;
  transform-origin: center;
  transform: translate(-50%, 0) scaleX(0);
  transition: transform 0.3s ease-in-out;
}

.menu span:hover::before {
  transform: translate(-50%, 0) scaleX(1);
}