body {
    background-image: url(./so.jpeg);
    background-repeat: no-repeat;
    background-size: cover;
    color: black;
    font-size: larger;
}

h1 {
    background: green;
    color: black;
    float: center;
    margin: 50px;
    padding: 20px;
    width:600px;
    border-radius: 50px;
    margin-left: 500px;
    font-style: italic;
    height: 100px;

}

.nav {
    font-family: verdana;
    font-weight: bold;
    height: 30px;
    margin: 5px 0;
    float: left;
    display: inline-block;
    color: whitesmoke;
    line-height: 90px;
    text-align: center;
    transition: 300ms;
    font-size: large;
    margin-left:50px;
    width: 70px;
}

a.active,
.nav a:hover {
    background-color: greenyellow;
    color: black;
    width: 150px;
    border-radius: 50px;
}

.a {
    width: 200px;
    float: center;
    margin-left: 40px;
}
.nav a {
    text-decoration: none;
    font-size: larger;
    font-family: verdana;
    font-weight: bold;
    width: 150%;
    height: 90%;
    margin: 5px 0;
    float: left;
    display: inline-block;
    background-color: black;
    line-height: 90px;
    text-align: center;
    color: chartreuse;
    border-radius: 50px;
}
p{
    font-size: x-large;
}
#df{
    float: right;
}
h2{
    text-decoration: underline;
    font-style: inherit;
    color: green;
    text-align: center;
}
.D , .C , .B , .A{
    margin: initial;
    /* background: rgb(107, 60, 216); */
     width:100%;
     /* -webkit-box-shadow: -1px 1px 71px 15px rgba(4, 91, 97, 1);
     -moz-box-shadow: -1px 1px 71px 15px rgba(4, 91, 97, 1);
     box-shadow: -1px 1px 71px 15px rgba(4, 91, 97, 1); */

     border-radius: 50px;
     /* /* -moz-border-radius: 12px 12px 12px 12px; */
     -webkit-border-radius: 12px 12px 12px 12px;
     border: 0px solid #000000;
     background-color: lightgray;
     border-bottom: 10px;
     margin-right: 10px;

}