:root {
  --page-bg: #ffffcc;
  --banner: #336666;
  --text: #222;
  --link: #336666;
  --max: 42rem;
}

body {
  background-color: var(--page-bg);
  color: var(--text);
  margin: 0;
  padding: 0 1rem 2rem;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.5;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto 1.25rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--banner);
  font-family: Helvetica, Arial, sans-serif;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--link);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus {
  text-decoration: underline;
}

.site-main {
  max-width: var(--max);
  margin: 0 auto;
}

.site-banner {
  background-color: var(--banner);
  color: #fff;
  text-align: center;
  padding: 0.4rem 0.75rem;
  margin: 0 0 1rem;
}

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

details {
  margin: 0.35rem 0;
}

summary {
  cursor: pointer;
  color: var(--link);
}