/*------------------------------------*\
    
  $CUSTOM PROPERTIES / VARIABLES

\*------------------------------------*/
:root {
  
  --gutter: 3rem;
  
  --bar-width: 2em;
  --bar-height: .25em;
  --bar-margin: .2em;
  --bar-borderradius: 0.2em;
  
  --bar-arrow-angle-value: 45; 

  --bar-transition: cubic-bezier(.25,.01,.75,1);
  --bar-transition-time: .2s;
  

  --bar-offset: calc( var(--bar-height) + var(--bar-margin) * 2 );   
  /* arrow angle */
  --bar-arrow-angle: calc( var(--bar-arrow-angle-value) * 1deg );
  /* offset of arrows so that they align perfectly */
  --bar-arrow-offset: calc( var(--bar-height) * 1.2 + var(--bar-margin) * 2 );
  /* center arrow to label without middle line */
  --bar-arrow-offsetcenter: calc( 50% * var(--bar-arrow-angle-value) / 90 );
}


.burger__input {
    display: none;
}

.burger__label {
  display: none; 
  align-items: center;
  position: relative;
  z-index: 11000;
  padding: 0 0 0 calc(var(--gutter) * .5);  
  cursor: pointer;
}


.burger__label {
  display: flex;
}

.burger__label > * {
  padding-left: .5rem;
  padding-right: .5rem;
}

.burger__input:checked ~ .burger__label i:before {
    content: '\f00d'; /* change font awesome icon to times symbol */
}


.burger__lines {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  
  transition: transform var(--bar-transition-time) var(--bar-transition);
}

.burger__line {
  display: block;

  width: var(--bar-width);
  height: var(--bar-height);

  margin-top: var(--bar-margin);
  margin-bottom: var(--bar-margin);
  border-radius: var(--bar-borderradius);

  background-color: var(--white);
  
  transition: all var(--bar-transition-time) var(--bar-transition);
}


.burger__label--rotatecross .burger__line:nth-child(2) {
  transition: width var(--bar-transition-time) var(--bar-transition);
  transition-delay: calc( var(--bar-transition-time) * 2);
}

.burger__label--rotatecross .burger__line:nth-child(1),
.burger__label--rotatecross .burger__line:nth-child(3) {
  transition-delay: var(--bar-transition-time);
}


.burger__input:checked ~ .burger__label--rotatecross .burger__line:nth-child(2) {
  width: 0;
  transition-delay: calc( var(--bar-transition-time) * 0);
}

.burger__input:checked ~ .burger__label--rotatecross .burger__line:nth-child(1),
.burger__input:checked ~ .burger__label--rotatecross .burger__line:nth-child(3) {
  transition-delay: var(--bar-transition-time);
}

.burger__input:checked ~ .burger__label--rotatecross .burger__line:nth-child(1) {
  transform: translateY( var(--bar-offset) );
}

.burger__input:checked ~ .burger__label--rotatecross .burger__line:nth-child(3){
  transform: 
    translateY(calc( var(--bar-offset) * -1 ))
    rotate(90deg)
  ;
}

.burger__input:checked ~ .burger__label--rotatecross .burger__lines {
  transition: all var(--bar-transition-time) var(--bar-transition);
  transition-delay: calc( var(--bar-transition-time) * 2 );
  transform: rotate(var(--bar-arrow-angle));
}