html,
body,
main {
  margin: 0;
}
#menu {
  position: absolute;
  bottom: 5em;
  right: 5em;
}
#start {
  width: 120px;
  height: 40px;
  background-color: #cc5555;
  color: #fff;
  font-size: 1.2em;
  border: none;
  outline: none;
  border-radius: 5px;
}
#start:hover {
  cursor: pointer;
}