ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
  }

li {
float: left;
}

li a {
display: block;
color: black;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}

/* Change the link color to #111 (black) on hover */
li a:hover {
background-color: #FFF8DC;
}

h1 {
    padding: 14px 16px;
    font-size: 24px;
    font-family: "Times New Roman";
    }

img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
    border-radius: 20px;
    max-width: 100%;
    height: auto;

}

h2 {
    padding: 14px 16px;
    font-size: 20px;
    font-family: "Courier New";
    }

p {
    padding: 14px 16px;
    font-size: 18px;
    font-family: "Times New Roman";
    }

mark {
    background-color:#E6E6FA;
    color: black;
    }

.column {
    float: left;
    padding: 3px;
    }

.left {
width: 65%;
    }

.right {
width: 35%;
text-align: right;
    }

@media screen and (max-width: 600px) {
    .column {
        width: 100%;
        }
    }