body {
    font-family: "Segoe UI", Candara, "Bitstream Vera Sans", "DejaVu Sans", "Bitstream Vera Sans", "Trebuchet MS", Verdana, "Verdana Ref", sans-serif;
    color: #333;
    margin: 0;
    padding: 0;
}

main {
    padding: 20px;
    margin-bottom: 70px;
}

.rainbow-button {
    position: absolute;
    left: 0;
    top: 0;
    margin: 10px;
}

.main-header {
    background-color: #007bff;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

.main-footer {
    background-color: #007bff;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.main-header nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.main-header nav ul li {
    display: inline;
    margin-right: 20px;
}

.main-header nav ul li a {
    color: #fff;
    text-decoration: none;
}

h2 {
    color: #007bff;
}

h3 {
    color: #007bff;
}

p {
    line-height: 1.6;
}

img {
    display: block;
    margin: 0 auto;
}