style.css

body {
    background-color:#6e6e6e; 
}

.alert {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0;
    margin: 0;
    text-align: center;
    height: 35px;
    font-size: 18px;
    
}

.container {
    padding-top: 40px;
}

.jumbotron {
    background-color:#383d41;
    color: white; 
}

.form-control {
    position: relative;
    display: inline-block;
}

.form-group {
    position: relative;
}

.autocomplete-items {
    position: absolute;
    border: 1px solid #d4d4d4;
    border-bottom: none;
    border-top: none;
    z-index: 99;
    top: 100%;
    left: 0;
    right: 0;
}

.autocomplete-items div {
    padding: 10px;
    cursor: pointer;
    background-color: #6e6e6e;
    border-bottom: 1px solid #d4d4d4;
}

.autocomplete-items div:hover {
    background-color: #8f8f8f;
}

.autocomplete-active {
    background-color: aliceblue !important;
    color: #000000;
}