@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Open Sans", sans-serif;
    line-height: 1.6em;
    color: #1a1a1a;
    background: #fff;
}

.wrap {
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 24px;
}

header {
    border-bottom: 2px solid #000;
    padding-bottom: 16px;
    margin-bottom: 32px;
}

header h1 {
    font-size: 180%;
    font-weight: 800;
    margin: 0 0 8px;
}

header nav a {
    color: #0000ee;
    text-decoration: none;
    margin-right: 16px;
    font-size: 90%;
}

header nav a:hover {
    text-decoration: underline;
}

main h2 {
    font-size: 115%;
    margin: 32px 0 8px;
}

main p {
    margin: 0 0 16px;
}

main a {
    color: #0000ee;
}

main a:hover {
    text-decoration: underline;
}

.boundary {
    border-left: 2px solid #ddd;
    padding-left: 16px;
    color: #555;
    font-size: 95%;
}

footer {
    border-top: 1px solid #000;
    margin-top: 40px;
    padding-top: 16px;
    font-size: 90%;
    color: #555;
    text-align: center;
}

footer a {
    color: #0000ee;
}