.container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 500px;
  margin: 0 auto;
  border: 1px solid #000;
  margin-top: 5px;
  padding: 5px;
  position: relative;
}

a {
  color: #000;
}

li {
  border: 1px solid #000;
}

.navbar{
  text-align: center;
  width: 100%;
  max-height: 0%;
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 10;
    transform: translateY(100%);        
    overflow: hidden;
    transition: max-height 0.7s;
    background: $navbar__color;
}
.navbar.show{
  max-height: 500px;
}

$(document).ready(function(){
  $('.menu-btn').click(function (e) {
    e.preventDefault();
    $('.navbar').toggleClass('show');
  });
})