Panel up open/close CSS3 animated button

index.html

<div class="btn-open-close">
  <span class="bar1"></span>
  <span class="bar2"></span>
</div>

panel-up-open-close-css3-animated-button.markdown

Panel up open/close CSS3 animated button

A Pen by Rodrigo Muniz on CodePen.

License.

script.js

$('.btn-open-close').on('click', function() {
  $('.btn-open-close').toggleClass('active')  
})

scripts

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

style.less

@import "lesshat";

@afd-blue:         	#1F2D39;
@afd-blue-light:   	lighten(@afd-blue, 60%);
@afd-yellow:       	#FFD390;

.btn-open-close {
  display: block;
  cursor: pointer;
  background-color: @afd-blue;
  height: 46px;
  width: 46px;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  border-radius: 50%;
  border: 1px solid #0E161A;
  border-width: 1px 0 1px 1px;
  box-shadow: 0 0 0 5px rgba(0, 0, 0, 0.2), inset 0 1px 0 0 rgba(255, 255, 255, .2);

  span {
    top: 22px;
    left: 12px;
    position: absolute;
    display: block;
    width: 22px;
    height: 4px;
    background: @afd-blue-light;
    border-radius: 3px;
    transition: all 1s ease-in-out;
  }
  .bar1 {
    transform: scale(.8,.8) translateX(-6px) translateY(-1px) rotate(-45deg);
  }
  .bar2 {
    transform: scale(.8,.8) translateX(7px) translateY(-1px) rotate(45deg);
  }

  &.active {
    .bar1 {
      transform: scale(1,1) translateX(0px) translateY(-1px) rotate(45deg);
    }

    .bar2 {
      transform: scale(1,1) translateX(0px) translateY(-1px) rotate(-45deg);
    }

  }

  &:hover {
    span {
      background-color: @afd-yellow;
      transition: all .4s;
    }
  }
  &:active {
      transform: scale(.95,.95);
      transition: all .2s;
  }
}