body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    max-width: 650px;
    padding: 0 10px;
    margin: 40px auto;

    background: whitesmoke;
    color: #444;
    line-height: 1.4;
}

.subheading {
    color: #444444;
    font-size: smaller;
}

h1, h2, h3 {
    line-height: 1.2;

}

th, tr, td {
    border: 1px solid #444;
}

table {
    margin-left: auto;
    margin-right: auto;
    border-collapse: collapse;
    border-spacing: 0 1em;
}

a {
    color: #444;
}

img {
    text-align: center;
    max-width: 100%;
}

a:link {
    text-decoration: none;
    border-bottom: #242424 1px solid;
}
 a:hover {
     border-bottom: #242424 2px solid;
 }

 hr {
     color: #444444;
 }

 @media (prefers-color-scheme: dark) {
     body {
         background: #242424;
         color: cornsilk;
     }
     .subheading {
         color: cornsilk;
         font-size: smaller;
     }
     a {
         color: cornsilk;
     }

     a:link {
         text-decoration: none;
         border-bottom: cornsilk 1px solid;
     }
     a:hover {
         border-bottom: cornsilk 2px solid;
     }

     hr {
         height: 1px;
         color: cornsilk;
     }
 }