html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  background-color: #a2ccb6;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.menu {
  background-color: #ee786e;
  width: 100px;
  height: 100px;
  position: relative;
  cursor: pointer;
  border-radius: 50%;
}
.menu .menu-icon-1 {
  background-color: #fceeb5;
  width: 50px;
  height: 10px;
  position: absolute;
  top: calc(50% - 5px);
  left: calc(50% - 25px);
  border-radius: 10% / 50%;
}
.menu .menu-icon-2 {
  background-color: #fceeb5;
  width: 10px;
  height: 50px;
  position: absolute;
  top: calc(50% - 25px);
  left: calc(50% - 5px);
  border-radius: 50% / 10%;
}
.menu .menu-list-box {
  background-color: #fceeb5;
  width: 10px;
  height: 0;
  position: absolute;
  bottom: 110px;
  left: calc(50% - 5px);
  display: flex;
  justify-content: space-around;
  align-items: center;
  border-radius: 0;
  transition: height 0.5s 0.8s, width 0.5s 0.3s, left 0.5s 0.3s, border-radius 0.5s 0.3s;
}
.menu .menu-list-box > .fa {
  color: transparent;
  font-size: 40px;
  opacity: 0;
  transition: color 0.3s, border-radius 0.3s, transform 0.3s, opacity 0.3s ease-in 0.6s;
}
.menu.active {
  animation: 0.3s menu-to-active linear;
}
.menu.active .menu-icon-1 {
  animation: 1.3s menu-icon-animate-1 ease-out forwards;
}
.menu.active .menu-icon-2 {
  animation: 1.3s menu-icon-animate-2 ease-out forwards;
}
.menu.active .menu-list-box {
  width: 250px;
  height: 70px;
  left: calc(50% - 125px);
  border-radius: 7px;
  transition: height 0.5s 0.3s, width 0.5s 0.8s, left 0.5s 0.8s, border-radius 0.5s 0.8s;
}
.menu.active .menu-list-box > .fa {
  color: #ee786e;
  opacity: 1;
}
.menu.active .menu-list-box > .fa:hover, .menu.active .menu-list-box > .fa:focus, .menu.active .menu-list-box > .fa:active {
  background-color: #fceeb5;
  color: #a2ccb6;
  border-radius: 40% / 15%;
  transform: scale(1.4);
}
.menu.clicked {
  animation: 0.3s menu-to-inactive linear;
}
.menu.clicked .menu-icon-1 {
  animation: 1.3s menu-icon-animate-3 ease-out forwards;
}
.menu.clicked .menu-icon-2 {
  animation: 1.3s menu-icon-animate-4 ease-out forwards;
}

@keyframes menu-to-active {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes menu-to-inactive {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.8);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes menu-icon-animate-1 {
  0% {
    margin-top: 0;
    margin-left: 0;
    opacity: 1;
    transform: rotate(0deg);
  }
  49.99999% {
    margin-top: 0;
    margin-left: -50px;
    opacity: 0;
    transform: rotate(0deg);
  }
  50% {
    margin-top: -12.5px;
    margin-left: -12.5px;
    opacity: 0;
    transform: rotate(45deg);
  }
  100% {
    margin-top: 0;
    margin-right: 0;
    opacity: 1;
    transform: rotate(45deg);
  }
}
@keyframes menu-icon-animate-2 {
  0% {
    margin-top: 0;
    margin-left: 0;
    opacity: 1;
    transform: rotate(0deg);
  }
  49.99999% {
    margin-top: -50px;
    margin-left: 0;
    opacity: 0;
    transform: rotate(0deg);
  }
  50% {
    margin-top: -12.5px;
    margin-left: 12.5px;
    opacity: 0;
    transform: rotate(45deg);
  }
  100% {
    margin-top: 0;
    margin-right: 0;
    opacity: 1;
    transform: rotate(45deg);
  }
}
@keyframes menu-icon-animate-3 {
  0% {
    margin-top: 0;
    margin-left: 0;
    opacity: 1;
    transform: rotate(45deg);
  }
  49.99999% {
    margin-top: 25px;
    margin-left: 25px;
    opacity: 0;
    transform: rotate(45deg);
  }
  50% {
    margin-top: 0;
    margin-left: 25px;
    opacity: 0;
    transform: rotate(0deg);
  }
  100% {
    margin-top: 0;
    margin-right: 0;
    opacity: 1;
    transform: rotate(0deg);
  }
}
@keyframes menu-icon-animate-4 {
  0% {
    margin-top: 0;
    margin-left: 0;
    opacity: 1;
    transform: rotate(45deg);
  }
  49.99999% {
    margin-top: 25px;
    margin-left: -25px;
    opacity: 0;
    transform: rotate(45deg);
  }
  50% {
    margin-top: 25px;
    margin-left: 0;
    opacity: 0;
    transform: rotate(0deg);
  }
  100% {
    margin-top: 0;
    margin-right: 0;
    opacity: 1;
    transform: rotate(0deg);
  }
}
@media (max-width: 100px) {
  .menu {
    width: 100vw;
    height: 100vw;
  }
  .menu .menu-icon-1 {
    width: 50vw;
    height: 10vw;
    top: calc(50% - 5vw);
    left: calc(50% - 25vw);
  }
  .menu .menu-icon-2 {
    width: 10vw;
    height: 50vw;
    top: calc(50% - 25vw);
    left: calc(50% - 5vw);
  }
  .menu .menu-list-box {
    bottom: calc(100vw + 10px);
  }
}