html, body {
  margin: 0;
  height: 100%;
  width: 100%;
  display: flex;
  background-color: #70a1ff;
}

.container {
  width: 500px;
  margin: auto;
  height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: 30px;
  position: relative;
  overflow: hidden;
  background-color: #70a1ff;
}

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

.container .svg-wraper {
  width: 100%;
  font-size: 0;
  position: relative;
}

.container .svg-wraper svg {
  position: absolute;
  bottom: 0;
  left: 50px;
  transition: all .3s;
  width: 200px;
  height: 40px;
}

.container .nav {
  display: flex;
  background-color: #333545;
  box-sizing: border-box;
  width: 100%;
}

.container .nav li {
  cursor: pointer;
  width: 100px;
  height: 90px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.container .nav li span {
  position: relative;
  z-index: 1;
  transition: all .3s;
  color: gray;
  font-size: 1.5em;
}

.container .nav li .circle {
  position: absolute;
  border-radius: 50%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0);
  transition: all .3s;
  background-color: #70a1ff;
  width: 80px;
  height: 80px;
  z-index: 0;
}

.container .nav li.active .circle {
  top: 40%;
  transform: translate(-50%, -50%) scale(1);
}

.container .nav li.active span {
  transform: translateY(-8px);
  color: #fff;
}