body {
    font-size: 18px;
    font-family: source-serif-pro, Georgia, Cambria, "Times New Roman", Times, serif;
    line-height: 28px;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
    font-weight: 600;
}

figure figcaption {
    font-style: italic;
}

img {
    /* keep images proportional */
    height: auto;
}

a {
    color: inherit;
    text-decoration: underline;
}

a.btn {
    background-color: #43A047;
}

a.btn:hover {
    background-color: #388E3C;
}

a:hover {
    color: #616161;
}