*, *::before, *::after { box-sizing: border-box; }

body {
  max-width: 65ch;
  margin: 0 auto;
  padding: 2rem 1rem;
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: #222;
  background-color: #fafafa;
}

h1, h2, h3 { line-height: 1.2; text-wrap: balance; }

h1 { font-weight: normal; border-bottom: 2px solid #222; padding-bottom: .5rem; }

nav a { margin-right: 1rem; color: #222; text-decoration: none; }
nav a:hover { text-decoration: underline; }

blockquote {
  margin-left: 0;
  padding-left: 1rem;
  border-left: 3px solid #ccc;
  color: #555;
}

time { font-family: monospace; color: #666; font-size: .9em; }

.video-wrapper { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; }
.video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

footer {
  margin-top: 3rem;
  border-top: 1px solid #ddd;
  padding-top: 1rem;
  font-size: .9em;
  color: #666;
}