.mobile_menu_btn{
    width: 30px;
    height: 45px;
    transition: left 0.1s;
    cursor: pointer;
    background-color:rgba(255,255,255,0);
}
.mobile_menu_btn span{
    position: absolute;
    top: 50%;
    left: 0px;
    right:0px;
    display: block;
    height: 4px;
    margin-top: -2px;
    background-color: var(--burger_button_color);
    font-size: 0;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-transition: background-color 0.3s;
    transition: background-color 0.3s;
    cursor:pointer;
}
.mobile_menu_btn span:before,
.mobile_menu_btn span:after{
    position: absolute;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--burger_button_color);
    content: ' ';
    -webkit-transition: -webkit-transform 0.3s;
    transition: transform 0.3s;
}
.mobile_menu_btn span:after{
    -webkit-transform: translateY(250%);
    transform: translateY(250%);
}
.mobile_menu_btn span:before{
    -webkit-transform: translateY(-250%);
    transform: translateY(-250%);
}

.open_mobilemenu .mobile_menu_btn span:after,
.open_mobilemenu .mobile_menu_btn span:before{
    position: absolute;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--burger_button_color_hover);
    content: ' ';
    -webkit-transition: -webkit-transform 0.3s;
    transition: transform 0.3s;
}
.open_mobilemenu .mobile_menu_btn span{
    background-color: rgba(35,110,175,0);
}
.open_mobilemenu .mobile_menu_btn span:before{
    -webkit-transform: translateY(0) rotate(-45deg);
    transform: translateY(0) rotate(-45deg);
}
.open_mobilemenu .mobile_menu_btn span:after{
    -webkit-transform: translateY(0) rotate(45deg);
    transform: translateY(0) rotate(45deg);
}