body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}
nav {
    width: 100%;
    background-color: #64b6e4;
    border-radius: 10px;
    padding: 10px;
}
h2 {
	color: #64b6e4;
}
img {
	border-radius:10px;
}
input[type="button"] {
	background-color:#64b6e4;
	color:#ffffff;
}
input, select {
	border-color: #64b6e4;
	border-radius: 5px;
}
nav ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    justify-content: left;
    margin: 0;
}
nav ul li {
    padding: 15px;
}
nav ul li a {
    color: white;
    text-decoration: none;
}
section {
    display: none;
}
section.active {
    display: block;
}
main {
    max-width: 700px;
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
}
form {
    max-width: 400px;
    margin: auto;
}
form label, form input, form select {
    display: block;
    width: 100%;
    padding: 5px;
    box-sizing: border-box;
}
.checkboxes div {
    margin-top: 5px;
}
.checkbox {
    width: 5em;
    display: inline;
}
.checkboxlabel {
    display: inline;
}
.button-group {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}
.about-section {
    display: flex;
    align-items: flex-start;
}
.about-section img {
    width: 20%;
    margin-right: 20px;
}
.about-section h2 {
    margin-top: 0;
}
footer {
    text-align: center;
    padding: 20px 0;
    background-color: #f1f1f1;
    width: 100%;
}