.menu {
  background-color: transparent;
  border: none;
  cursor: pointer;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  padding: 0;
}

.line {
  fill: none;
  stroke: rgb(255, 255, 255);
  stroke-width: 6;
  -webkit-transition: stroke-dasharray 600ms cubic-bezier(0.4, 0, 0.2, 1), stroke-dashoffset 600ms cubic-bezier(0.4, 0, 0.2, 1);
  transition: stroke-dasharray 600ms cubic-bezier(0.4, 0, 0.2, 1), stroke-dashoffset 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.line1 {
  stroke-dasharray: 60 207;
  stroke-width: 6;
}

.line2 {
  stroke-dasharray: 60 60;
  stroke-width: 6;
}

.line3 {
  stroke-dasharray: 60 207;
  stroke-width: 6;
}

.opened .line1 {
  stroke-dasharray: 90 207;
  stroke-dashoffset: -134;
  stroke-width: 6;
}

.opened .line2 {
  stroke-dasharray: 1 60;
  stroke-dashoffset: -30;
  stroke-width: 6;
}

.opened .line3 {
  stroke-dasharray: 90 207;
  stroke-dashoffset: -134;
  stroke-width: 6;
}