.menu{
  position: fixed;
  left:10px;
  bottom:90px;
  z-index: 99999;
}

.menu a{
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  tap-highlight-color: rgba(0, 0, 0, 0);
}
.menu-open-button, .menu-item {
  background: #303050;
  border-radius: 100%;
  width: 42px;
  height: 42px;
  border:1px #ffffff solid;
  position: absolute;
  color: white;
  text-align: center;
  transform: translate3d(0, 0, 0);
  transition: transform ease-out 200ms;
}
.menu-item {
  display: flex;
  align-items: center;
  justify-content: center;
}
.menu-item img{
  width: 100%;
  height: 100%;
}
.menu-open {
  display: none;
}
.hamburger {
  width: 18px;
  height: 2px;
  background: white;
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -9px;
  margin-top: -1.5px;
}
.hamburger-1 {
  transform: translate3d(0, -6px, 0);
}
.hamburger-2 {
  transform: translate3d(0, 0, 0);
}
.hamburger-3 {
  transform: translate3d(0, 6px, 0);
}

.menu-open:checked + .menu-open-button .hamburger-1 {
  transform: translate3d(0, 0, 0) rotate(45deg);
}
.menu-open:checked + .menu-open-button .hamburger-2 {
  transform: translate3d(0, 0, 0) scale(0.1, 1);
}
.menu-open:checked + .menu-open-button .hamburger-3 {
  transform: translate3d(0, 0, 0) rotate(-45deg);
}

.menu {
  padding-top: 10px;
  padding-left: 10px;
  width: 100%;
  height: auto;
  box-sizing: border-box;
  text-align: left;
  font-size: 4px;
  font-size: 0.4rem;
}
.menu a{
  text-decoration: none;
}
.menu-open-button {
  z-index: 2;
  transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transition-duration: 400ms;
  transform: scale(1.1, 1.1) translate3d(0, 0, 0);
  cursor: pointer;
}

.menu-open-button:hover {
  transform: scale(1.2, 1.2) translate3d(0, 0, 0);
}

.menu-open:checked + .menu-open-button {
  transition-timing-function: linear;
  transition-duration: 200ms;
  transform: scale(1.0, 1.0) translate3d(0, 0, 0);
}

.menu-open:checked ~ .menu-item {
  transition-timing-function: cubic-bezier(0.165, 0.84, 0.44, 1);
}
.menu-open:checked ~ .menu-item:nth-child(3) {
  transition-duration: 190ms;
  transform: scale(1.6, 1.6) translate3d(40px, 0, 0);
}
.menu-open:checked ~ .menu-item:nth-child(4) {
  transition-duration: 290ms;
  transform: scale(1.6, 1.6) translate3d(90px, 0, 0);
}
.menu-open:checked ~ .menu-item:nth-child(5) {
  transition-duration: 390ms;
  transform: scale(1.6, 1.6) translate3d(140px, 0, 0);
}