:root {
  --paper: #ffffff;
  --ink: #262626;
  --muted: #7a7a7a;
  --rule: #e4e4e4;
  --accent: #2a5d8f;
  --body-font: Georgia, "Times New Roman", serif;
  --head-font: "Lato", "Helvetica Neue", Arial, sans-serif;
  --side-width: 260px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.25rem/1.65 var(--body-font);
}

a { color: var(--accent); text-underline-offset: 0.15em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* Sidebar */

.side {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--side-width);
  padding: 64px 32px;
  border-right: 1px solid var(--rule);
  font: 400 0.9rem/1.5 var(--head-font);
  color: var(--muted);
}

.author { display: block; color: var(--ink); text-decoration: none; }
.avatar { display: block; width: 72px; height: 72px; border-radius: 50%; margin-bottom: 1rem; }
.name { display: block; margin-bottom: 0.5em; font: 900 1.35rem/1.2 var(--head-font); }
.author:hover .name { color: var(--accent); }

.bio { margin: 0 0 1.5em; }
.bio a { color: inherit; }
.bio a:hover { color: var(--accent); }

.side nav a { display: block; margin-bottom: 0.3em; color: var(--ink); text-decoration: none; }
.side nav a:hover { color: var(--accent); }

/* Article */

main { margin-left: var(--side-width); padding: 64px 48px 96px; }
article { max-width: 34rem; }

.series { margin: 0 0 0.75rem; font: 700 0.95rem/1.4 var(--head-font); color: var(--accent); }

h1 {
  margin: 0 0 0.6rem;
  font: 900 2.9rem/1.08 var(--head-font);
  letter-spacing: -0.02em;
}

.date { margin: 0 0 2.75rem; font: 400 0.95rem/1.4 var(--head-font); color: var(--muted); }

.prose h2 { margin: 2.2em 0 0.7em; font: 900 1.45rem/1.25 var(--head-font); }
.prose p { margin: 0 0 1.25em; }
.prose ol, .prose ul { margin: 0 0 1.25em; padding-left: 1.4em; }
.prose li { margin-bottom: 0.6em; padding-left: 0.2em; }
.prose blockquote {
  margin: 1.6em 0;
  padding: 0 0 0 1.1em;
  border-left: 3px solid var(--accent);
  font-style: italic;
}
.prose blockquote p { margin: 0; }

/* Comments */

.comments {
  max-width: 34rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
.comments h2 { margin: 0 0 1.25rem; font: 900 1.45rem/1.25 var(--head-font); }

/* Small screens: the sidebar becomes a header */

@media (max-width: 860px) {
  body { font-size: 1.1rem; }

  .side {
    position: static;
    width: auto;
    padding: 24px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }
  .author { display: flex; align-items: center; gap: 12px; }
  .avatar { width: 44px; height: 44px; margin: 0; }
  .name { margin: 0; font-size: 1.2rem; }
  .bio { margin: 0.75rem 0 0.5rem; }
  .side nav a { display: inline; margin-right: 1em; }

  main { margin-left: 0; padding: 40px 16px 64px; }
  h1 { font-size: 2.1rem; }
}