/* After the docpage theme of bjarni-gunnarsson.net/works/docs. */

html { background: #171b21; }
body { margin: 0; background: #171b21; }

.docpage {
  --doc-fg: #ffffff;
  --doc-dim: #cfd2da;
  --doc-accent: #8b94ac;
  --doc-rule: rgba(255, 255, 255, 0.22);
  --doc-hair: rgba(255, 255, 255, 0.09);
  --doc-serif: "Palatino", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --doc-sans: "Avenir Next", "Avenir", "Helvetica Neue", Helvetica, Arial, sans-serif;

  font-family: var(--doc-sans);
  font-size: 16px;
  line-height: 1.55;
  color: var(--doc-fg);
  max-width: 52em;
  margin: 0 auto;
  padding: 3.2em 2em 6em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.docpage p { margin: 0 0 0.85em; }

.docpage .doc-title {
  font-family: var(--doc-serif);
  font-weight: 700;
  font-size: 2em;
  text-align: center;
  margin: 0 auto 0.6em;
  padding-bottom: 0.7em;
  border-bottom: 1px solid var(--doc-rule);
}

.docpage .doc-standfirst {
  font-family: var(--doc-serif);
  font-style: italic;
  color: var(--doc-dim);
  text-align: center;
  margin: 0 0 2.5em;
}

.docpage h2 {
  font-family: var(--doc-serif);
  font-weight: 700;
  font-size: 1.35em;
  color: var(--doc-fg);
  margin: 2.8em 0 0.9em;
  padding-bottom: 0.45em;
  border-bottom: 1px solid var(--doc-rule);
}

.docpage h2 .doc-num {
  font-family: var(--doc-sans);
  font-size: 0.62em;
  color: var(--doc-accent);
  font-variant-numeric: tabular-nums;
  margin-right: 0.8em;
}

.docpage a { color: var(--doc-accent); font-style: italic; text-decoration: none; }
.docpage a:hover { text-decoration: underline; text-underline-offset: 3px; }
.docpage strong { color: var(--doc-fg); font-weight: 700; }
.docpage code { font-family: "Fira Code", "Menlo", monospace; font-size: 0.88em; color: var(--doc-dim); }

.docpage .back { font-family: var(--doc-serif); text-align: center; margin: 0 0 1.4em; }

/* topic list: one hairline-ruled row per topic */
.docpage .topics { list-style: none; margin: 0; padding: 0; }
.docpage .topics li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1em;
  padding: 0.9em 0;
  border-top: 1px solid var(--doc-hair);
}
.docpage .topics li:last-child { border-bottom: 1px solid var(--doc-hair); }
.docpage .topics a { font-family: var(--doc-serif); font-size: 1.25em; }
.docpage .topics span { color: var(--doc-dim); font-size: 0.88em; white-space: nowrap; }

/* answer toggle: the checkbox sits before its label and reveals the sibling answer */
.docpage .q input { accent-color: var(--doc-accent); margin: 0 0.5em 0 0; vertical-align: middle; cursor: pointer; }
.docpage .q label {
  font-family: var(--doc-serif);
  font-style: italic;
  color: var(--doc-accent);
  cursor: pointer;
  user-select: none;
}
.docpage .q .answer { display: none; margin-top: 1em; color: var(--doc-dim); }
.docpage .q input:checked ~ .answer { display: block; }
.docpage .q input:checked + label { color: var(--doc-dim); }

.docpage .callout {
  border-left: 2px solid var(--doc-rule);
  padding-left: 1em;
  margin: 1em 0;
  font-size: 0.92em;
}
.docpage .callout-title {
  font-family: var(--doc-sans);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72em;
  color: var(--doc-accent);
  margin-bottom: 0.5em;
}

@media (max-width: 720px) {
  .docpage { font-size: 15.5px; padding: 1.6em 16px 4em; }
  .docpage .doc-title { font-size: 1.7em; }
}