<div class="btn">
  <span></span>
  <span></span>
  <span></span>
</div>

body {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  background: #444;
}
.btn {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 60px;
  height: auto;
  cursor: pointer;
}
.btn span {
  width: 48px;
  height: 4px;
  background: #fff;
  box-shadow: 0 2px 2px 0 rgba(0,0,0,0.4);
  transition: 0.3s ease-in-out;
}
.btn span:nth-child(1), 
.btn span:nth-child(3) {
  margin-left: 12px;
}
.btn:hover span:nth-child(1),
.btn:hover span:nth-child(3) {
  margin-left: 0;
}
.btn:hover span:nth-child(2) {
  margin-left: 12px;
}