body {
    font-family: Arial, sans-serif;
    line-height: 1.5;
}

.header {
    padding: 40px;
    width: 900px;
    background-color: #f0f8ff;
    color: #000;
}

.nav {
    margin-top: 20px;
    margin-bottom: 20px;
    padding-top: 20px;
    padding-bottom: 20px;
    padding-left: 40px;
    padding-right: 40px;
    width: 900px;
    background-color: #496883;
    color: #fff;
}

.nav a {
    margin-right: 30px;
    color: #fff;
}

.nav a:last-child {
    margin-right: 0;
}

.main {
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 40px;
    width: 900px;
    background-color: #dcebf0;
}

.footer {
    margin-top: 20px;
    margin-bottom: 20px;
    padding-top: 20px;
    padding-bottom: 20px;
    padding-left: 40px;
    padding-right: 40px;
    width: 900px;
    background-color: #1d3f5e;
    color: #fff;
}

p {
    font-size: 16px;
}

h1, h2, h3 {
    margin-top: 0;
    margin-bottom: 24px;
    line-height: 1;
}

h1 {
    font-size: 42px;
}

h2 {
    font-size: 32px;
}

h3 {
    font-size: 26px;
}

blockquote {
    margin-top: 40px;
    margin-bottom: 40px;
    margin-left: 0;
    margin-right: 0;
    padding-top: 15px;
    padding-bottom: 15px;
    padding-left: 40px;
    padding-right: 40px;
    font-size: 18px;
    border-left: 3px solid #f24137;
}

article {
    margin-bottom: 50px;
}

article:last-child {
    margin-bottom: 0;
}