:root {
  --page-bg: #f1f1ed;
  --panel-bg: #ffffff;
  --header-bg: #1e1e1e;
  --nav-bg: #2b2b2b;
  --text: #242424;
  --muted: #6d6d6d;
  --border: #c5c5c5;
  --accent: #c96d10;
  --accent-dark: #8b2c19;
  --link: #0645ad;
  --link-visited: #0b0080;
  --notice-bg: #fff6d6;
  --notice-border: #d4b356;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font-family: Verdana, Geneva, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--link);
  text-decoration: underline;
}

a:visited {
  color: var(--link-visited);
}

.wrap {
  width: min(1040px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  background: var(--header-bg);
  color: #ffffff;
  border-top: 6px solid var(--accent-dark);
  border-bottom: 4px solid var(--accent);
}

.header-inner {
  padding: 1.2rem 0 1rem;
}

.site-brand {
  max-width: 52rem;
}

.site-title {
  color: #ffffff;
  text-decoration: none;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-title:visited {
  color: #ffffff;
}

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

.site-tagline {
  margin: 0.45rem 0 0;
  color: #dddddd;
  font-size: 0.98rem;
}

.main-nav {
  background: var(--nav-bg);
  border-top: 1px solid #474747;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-nav a {
  display: block;
  padding: 0.8rem 1rem;
  color: #ffffff;
  text-decoration: none;
  border-right: 1px solid #4c4c4c;
}

.main-nav a:visited {
  color: #ffffff;
}

.main-nav a:hover,
.main-nav a:focus {
  background: #3b3b3b;
  text-decoration: underline;
}

.main-nav a[aria-current="page"] {
  background: var(--accent);
  font-weight: 700;
}

.page-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
  padding: 1.5rem 0 2rem;
}

.panel,
.content {
  background: var(--panel-bg);
  border: 1px solid var(--border);
}

.panel {
  padding: 1rem;
}

.topics-panel h2 {
  margin-top: 0;
}

.topics-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.topics-list li + li {
  margin-top: 0.45rem;
}

.topics-list span {
  color: var(--muted);
}

.content {
  padding: 1.5rem;
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.25;
  color: #202020;
}

h1 {
  margin: 0 0 1rem;
  font-size: 2rem;
}

h2 {
  margin: 2rem 0 0.85rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid #dddddd;
  font-size: 1.4rem;
}

p {
  margin: 0 0 1rem;
}

.notice {
  padding: 0.9rem 1rem;
  background: var(--notice-bg);
  border: 1px solid var(--notice-border);
  color: #43391b;
}

.site-footer {
  background: #e8e6df;
  border-top: 3px solid #b8b8b8;
  color: #373737;
}

.site-footer .wrap {
  padding: 1rem 0 1.25rem;
}

.site-footer p {
  margin: 0 0 0.3rem;
}

@media (max-width: 820px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }

  .content {
    order: 1;
  }

  .site-title {
    font-size: 1.65rem;
  }
}

@media (max-width: 560px) {
  .wrap {
    width: min(100% - 1rem, 1040px);
  }

  .header-inner {
    padding: 1rem 0 0.9rem;
  }

  .site-tagline {
    font-size: 0.95rem;
  }

  .main-nav a {
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid #4c4c4c;
  }

  .content,
  .panel {
    padding: 1rem;
  }

  h1 {
    font-size: 1.75rem;
  }
}