*{box-sizing:border-box;}

body {
  background: #f2f2f2;
  font-family: "Georgia", serif;
  line-height: 1.33;
  margin: 0 auto;
  max-width: 680px;
  padding: 0 10px;
  width: 100%;
}

header nav ul {
    list-style: none;
    font-family: sans-serif;
    margin: 10px 0 0 0;
    padding: 0;
}
header nav ul li {
    display: inline-block;
    margin: 0 10px 10px 0;
}
header nav a {
    background: white;
    border: 1px solid black;
    cursor: pointer;
    display: block;
    padding: 6px;
}
li.more {
    display: none;
}

main {
    background: white;
    border: 1px solid;
    margin: 0;
    padding: 0 15px;
}
main p {
    text-align: justify;
}

h1,h2,h3,h4,h5,h6 {
    font-family: sans-serif;
}
h1 {
    border-bottom: 1px solid;
    line-height: 1.25;
    margin: 15px 0 0 0;
}

h1#posts ~ ul {
  list-style: none;
  padding-left: 0;
}
h1#posts ~ ul li a {
  display: block;
  margin-bottom: 15px;
}

h2{ 
    border-bottom: 1px solid lightgrey;
    font-size: 18px; 
    margin: 2rem 0 0; 
}

h3 {
  font-size: 16px;
}

dd {
  margin-bottom: 10px;
}

img{height:auto;max-width:100%;}

blockquote {
    color: brown;
    font-style: italic;
}

figure { margin: 2.5rem auto; }
figure img { display: block; margin: 0 auto 10px; }
figcaption { text-align: center; }

pre, p code, li code { font-size: 14px; }

pre {
  background: #f2f2f2;
  padding: 6px;
  overflow: auto;
}
pre:has(code.language-diagram) {
    background: none;
}

table {
  border-collapse: collapse;
  margin: 2rem 0;
  text-align: left;
  width: 100%;
}
table caption {
  background: #f2f2f2;
  padding: 4px;
}
table tr {
  border-bottom: 1px solid;
}
table td, table th {
  padding: 4px;
}

footer {
    padding: 0 10px;
    margin: 1rem 0 2rem;
}

.footnotes {
  font-size: 90%;
  margin-top: 2rem;
}

.footer-nav {
    display: none;
}

.w-100 {
  max-width: 100px;
}

@media(max-width: 600px) {
    body {
        padding: 10px;
    }
    header nav ul {
        margin: 0;
    }
    header nav ul li:nth-of-type(4),
    header nav ul li:nth-of-type(5),
    header nav ul li:nth-of-type(6),
    header nav ul li:nth-of-type(7),
    header nav ul li:nth-of-type(8) {
        display: none;
    }
    li.more {
        display: inline-block;
    }
    .footer-nav {
        display: block;
    }
}

@media(prefers-color-scheme: dark) {
  body {
    background-color: black;
  }
  header nav a {
    background: black;
    border-color: white;
  }
  main {
    background: #1d1d1d;
  }
  pre {
    background: black;
  }
  blockquote {
    color: lightgoldenrodyellow;
  }
}