.hamburger {
    display: inline-block;
    cursor: pointer;
    transition-property: opacity, filter;
    transition-duration: 0.15s;
    transition-timing-function: linear;
    font: inherit;
    color: inherit;
    text-transform: none;
    background-color: transparent;
    border: 0;
    margin: 0;
    overflow: visible;
}
.hamburger:hover {
    opacity: 0.7;
}
.hamburger:focus {
    outline:none; 
}
.hamburger.is-active:hover {
    opacity: 0.7; 
}
.hamburger.is-active .hamburger-inner,
.hamburger.is-active .hamburger-inner::before,
.hamburger.is-active .hamburger-inner::after {
      background-color: #fff; 
}
.hamburger-box {
    width: 30px;
    height: 24px;
    display: inline-block;
    position: relative; 
}
  
.hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -2px; 
}
.hamburger-inner, .hamburger-inner::before, .hamburger-inner::after {
    width: 30px;
    height: 4px;
    background-color: #fff;
    border-radius: 4px;
    position: absolute;
    transition-property: transform;
    transition-duration: 0.15s;
    transition-timing-function: ease; 
}
.hamburger-inner::before, .hamburger-inner::after {
    content: "";
    display: block; 
}
.hamburger-inner::before {
    top: -10px; 
}
.hamburger-inner::after {
    bottom: -10px; 
}

/*
* Squeeze
*/
.hamburger--squeeze .hamburger-inner {
transition-duration: 0.075s;
transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19); 
}
.hamburger--squeeze .hamburger-inner::before {
    transition: top 0.075s 0.12s ease, opacity 0.075s ease; 
}
.hamburger--squeeze .hamburger-inner::after {
    transition: bottom 0.075s 0.12s ease, transform 0.075s cubic-bezier(0.55, 0.055, 0.675, 0.19); 
}

.hamburger--squeeze.is-active .hamburger-inner {
transform: rotate(45deg);
transition-delay: 0.12s;
transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1); 
}
.hamburger--squeeze.is-active .hamburger-inner::before {
    top: 0;
    opacity: 0;
    transition: top 0.075s ease, opacity 0.075s 0.12s ease; 
}
.hamburger--squeeze.is-active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(-90deg);
    transition: bottom 0.075s ease, transform 0.075s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1); 
}