.burger {
        height: 3em;
        width: 3em;
        position: relative;
        font-size: 8px;
        cursor: pointer;
        -webkit-transition: .2s all;
        -o-transition: .2s all;
        transition: .2s all;
        -webkit-tap-highlight-color: transparent;
    }
    .burger .burger-lines:before {
        left: 0;
        top: 1em;
    }
    .burger .burger-lines {
        top: 50%;
        margin-top: -0.125em;
    }
    .burger .burger-lines, .burger .burger-lines:before {
        pointer-events: none;
        display: block;
        content: '';
        width: 100%;
        border-radius: 0.25em;
        background-color: #ffffff;
        height: 0.25em;
        position: absolute;
        -webkit-transform: rotate(0);
        -ms-transform: rotate(0);
        transform: rotate(0);
    }
    .bg-dark .burger .burger-lines,
    .bg-dark .burger .burger-lines:before {
        pointer-events: none;
        display: block;
        content: '';
        width: 100%;
        border-radius: 0.25em;
        background-color: #ffffff;
        height: 0.25em;
        position: absolute;
        -webkit-transform: rotate(0);
        -ms-transform: rotate(0);
        transform: rotate(0);
    }
    .burger .burger-lines:before {
        left: 0;
        top: 1em;
    }

    .burger.burger-rotate .burger-lines, .burger.burger-rotate .burger-lines:before {
        -webkit-transition: all .2s;
        -o-transition: all .2s;
        transition: all .2s;
    }
    .burger.burger-rotate.open {
        -webkit-transform: rotate(180deg);
        -ms-transform: rotate(180deg);
        transform: rotate(180deg);
    }
    .burger.burger-rotate.open .burger-lines {
        -webkit-transform: rotate(135deg);
        -ms-transform: rotate(135deg);
        transform: rotate(135deg);
        background-color: #ffffff;
    }
    .burger.burger-rotate.open .burger-lines:before {
        left: 0px;
        top: 0px;
        background-color: #ffffff;
    }
    .burger.burger-rotate.open .burger-lines:before {
        -webkit-transform: rotate(-90deg);
        -ms-transform: rotate(-90deg);
        transform: rotate(-90deg);
    }