a:link, a:visited {
    background-color: #99CCFF;    color: white;
    padding: 14px 25px 14px 14px;
	text-align: center; 
    text-decoration: none;
    display: inline-block;
}

a:hover {
    background-color: grey;
} 

 a:active {
    background-color: grey;
} 

.img1 {
    position: absolute;    left: 0px;
    top: 0px;
    z-index: -1;
	} 
	
	.overflow
	        {
    overflow: auto;
            } 
			ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
   text-align: center;
}

li {
    float: left;
}

li a, .dropbtn {
    display: inline-block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration:none;
}

.li a:hover, .dropdown:hover .dropbtn {
    background-color: red;
}

li.dropdown {
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: center;
}

.dropdown-content a:hover {background-color: #f1f1f1}

.dropdown:hover .dropdown-content {
    display: block;
}