#menu-button {
  z-index: 10000;
  position: fixed;
  top: 10px;
  left: 10px;
  width: 80px;
  height: 80px;
  overflow: hidden;
  background: transparent;
  color: rgb(35, 165, 197);
  line-height: 80px;
  text-align: center;
  font-size: 70px;
  cursor: pointer;
  transition: all .5s;
}

#menu-button::after {
  content: '×';
}

#menu-button.close {
  color: rgb(35, 165, 197);
  background: transparent;
}

#menu-button.close::after {
  content: '≡';
}

#menu {
  z-index: 1000;
  transition: transform .5s;
  position: fixed;
  max-width: 480px;
  margin-left: 10px;
  width: 80px;
  top: 0;
  transform: translateY(calc(-100%));
}

#menu ul {
  padding: 0;
  width: auto;
}

#menu li {
  text-decoration: none;
  list-style-type: none;
}

#menu li a {
  text-decoration: none;
  list-style-type: none;
  text-align: center;
  align-items: center;
}

#menu i {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

#menu.show-menu {
  transform: translateY(90px);
}