body {
    background-color: #D3D3D3;
    color: #1f3c4d;
    font-family: Arial, sans-serif;
    margin: 40px;
}

h1 {
    text-align: center;
    color: #0b5d5e;
}

h2 {
    color: #167a7b;
}

p {
    font-size: 18px;
    line-height: 1.6;
}

ul, ol {
    font-size: 17px;
    line-height: 1.8;
}

img {
    width: 400px;
    display: block;
    margin: 20px;
}

a {
    color: #0066cc;
}