ul {
    text-align: center;
    margin: 0;
    padding: 15px 7px;
    list-style: none;
}
ul li {
    font: bold 20px/18px Tahoma;   /* <- to change the menu text size */
    display: inline-block;
    margin: -4px;
    position: relative;
    padding: 15px 37px; /* <-to change the width of the menu */
    background: #f1ff00;
    cursor: pointer;
    -webkit-transition: all 0.2s;
    -moz-transition: all 0.2s;
    -ms-transition: all 0.2s;
    -o-transition: all 0.2s;
    transition: all 0.2s;
    color: #000;
}
ul li:hover {
    background: #808080;
    color: #000;
}
ul li ul {
    padding: 0;
    position: absolute;
    top: 48px;
    left: 0;
    width: 250px;
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    box-shadow: none;
    display: none;
    opacity: 0;
    visibility: visible;
    -webkit-transiton: opacity 0.2s;
    -moz-transition: opacity 0.2s;
    -ms-transition: opacity 0.2s;
    -o-transition: opacity 0.2s;
    -transition: opacity 0.2s;
}
ul li ul li {
    background: #f1ff00;
    display: block;
}
ul li ul a:hover { background: #808080; }
ul li:hover ul {
    display: block;
    opacity: 1;
    visibility: visible;
}
.home {
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
}
.contact {
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
}
a:link {
    text-decoration: none;
    color:black;
}

a:visited {
    text-decoration: none;
    color:black;
}

a:hover {
    text-decoration: none;
}

a:active {
    text-decoration: none;
    color: yellow;
}