Hi A.M,
please check Style.css
Confilct with this style
.dropdown-menu input, .dropdown-menu button, .dropdown-menu a {
display: block;
background: none;
border: none;
margin: 0;
padding: 3px 20px;
font-weight: 400;
line-height: 1.42857143;
color: #777;
white-space: nowrap;
}