html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  display: flex;
  background-image: linear-gradient(to bottom, #00bdea 50%, #208FF9 50%);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  margin: auto;
  width: auto;
  height: 90px;
  background-color: #fff;
  border-radius: 5px;
  position: relative;
}

.container input {
  position: absolute;
  z-index: -10;
}

.container input:checked ~ .nav-container {
  width: 390px;
}

.container input:checked ~ .nav-container .tab-list .item .item-txt {
  opacity: 1;
  transform: rotateY(0);
}

.container input:checked ~ .nav-container .tab-list .item:nth-child(1) .item-txt {
  transition-delay: 0s;
}

.container input:checked ~ .nav-container .tab-list .item:nth-child(2) .item-txt {
  transition-delay: 0.1s;
}

.container input:checked ~ .nav-container .tab-list .item:nth-child(3) .item-txt {
  transition-delay: 0.2s;
}

.container input:checked ~ .nav-container .tab-list .item:nth-child(4) .item-txt {
  transition-delay: 0.3s;
}

.container input:checked ~ .icon-wraper::before {
  transform: translateY(7px) rotate(-225deg);
}

.container input:checked ~ .icon-wraper::after {
  transform: translateY(-7px) rotate(225deg);
}

.container .icon-wraper {
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.container .icon-wraper::before {
  content: '';
  display: block;
  height: 4px;
  width: 28px;
  background-color: #096DD3;
  margin-bottom: 10px;
  border-radius: 5px;
  transform-origin: 50% 50%;
  transition: transform 1s cubic-bezier(0.48, 0.43, 0.29, 1.3);
}

.container .icon-wraper::after {
  content: '';
  display: block;
  height: 4px;
  width: 28px;
  background-color: #096DD3;
  border-radius: 5px;
  transform-origin: 50% 50%;
  transition: transform 1s cubic-bezier(0.48, 0.43, 0.29, 1.3);
}

.container .nav-container {
  width: 90px;
  height: 90px;
  transition: width 1s cubic-bezier(0.48, 0.43, 0.29, 1.3);
}

.container .nav-container .tab-list {
  height: 100%;
  padding: 0 100px 0 10px;
  display: flex;
  justify-content: space-between;
  box-sizing: border-box;
  width: 390px;
}

.container .nav-container .tab-list .item {
  flex-shrink: 0;
  width: 70px;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #6C7784;
  font-weight: bold;
  font-size: 14px;
  cursor: pointer;
}

.container .nav-container .tab-list .item:hover {
  color: #00bdea;
}

.container .nav-container .tab-list .item .item-txt {
  opacity: 0;
  transition: transform 0.7s cubic-bezier(0.48, 0.43, 0.7, 2.5), opacity 0.2s;
  transform: rotateY(-70deg);
}

.container .nav-container .tab-list .item:nth-child(1) .item-txt {
  transition-delay: .3s;
}

.container .nav-container .tab-list .item:nth-child(2) .item-txt {
  transition-delay: .2s;
}

.container .nav-container .tab-list .item:nth-child(3) .item-txt {
  transition-delay: .1s;
}

.container .nav-container .tab-list .item:nth-child(4) .item-txt {
  transition-delay: .0s;
}