header {
    background-color: #22D3C4FF;
    padding: 10px;
    text-align: right;
}

body {
    background-color: #f0f0f0;
    margin: 0px;
    padding: 0px;
}

/* Style the topnav */
ul.topnav {
    display: flex;
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #333333;
    font: 14px Arial, sans-serif;
}

/* Style links in topnav */
ul.topnav li a {
    display: block;
    color: #f1f1f1;
    padding: 14px 16px;
    text-decoration: none;
}

/* Change color on hover in topnav */
ul.topnav li a:hover {
    background-color: #dddddd;
    color: black;
}

div.flex-container {
    display: flex;
    flex-direction: row;
}

div.flex-container > div {
    margin: 10px;
}

/* Use media query and show the flex items vertically if screen width is less than 600px */
@media screen and (max-width:600px) {
    div.flex-container {
        flex-direction: column;
    }
}

div{
    margin: 10px;
}

h1 {
    text-align: right;
    font: 52px Arial, sans-serif;
    line-height: 0;
    color: #f1f1f1;
}

h2 {
    font: 20px Arial, sans-serif;
    color: #22d3c4;
}

h3 {
    font: 16px Arial, sans-serif;
    color: #333333;
}

p {
    font: 14px Arial, sans-serif;
    color: #333333;
}

p.ex1 {
    font: 14px Arial, sans-serif;
    color: #333333;
}