* { box-sizing: border-box; }

:root {
  --text: #111;
  --muted: #4f4f4f;
  --quiet: #777;
  --faint: #999;
  --line: #dedede;
  --line-soft: #eeeeee;
  --surface: #fafafa;
  --width: 860px;
}

body.site-page {
  max-width: none;
  margin: 0;
  padding: 0 0 72px;
  color: var(--text);
  background: #fff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.62;
}

.site-page a { color: var(--text); }
.site-page a:hover { color: var(--muted); }
.site-page button { font: inherit; }

.site-page .wrap,
.site-page > h1,
.site-page > p.intro,
.site-page > .topic-toc,
.site-page > .topic,
.site-page > .note,
.site-page > footer {
  max-width: var(--width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
}

.site-page nav {
  max-width: var(--width);
  margin: 0 auto;
  padding: 18px 28px 16px;
  border-bottom: 1px solid var(--line);
}

.site-page nav,
.site-page nav .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 28px;
}

.site-page nav .wrap {
  max-width: none;
  padding: 0;
}

.site-page nav .brand {
  color: var(--text);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}

.site-page nav .links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
}

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

.site-page nav .links a:hover,
.site-page nav .links a.active {
  color: var(--text);
}

.site-page nav .links a.active {
  font-weight: 650;
}

.site-page main {
  padding: 58px 0 0;
}

.site-page main .wrap > h1:first-child {
  margin-top: 0;
}

.site-page h1 {
  font-size: 34px;
  font-weight: normal;
  line-height: 1.18;
  margin-bottom: 14px;
  letter-spacing: 0;
}

.site-page h2 {
  font-size: 22px;
  font-weight: normal;
  line-height: 1.35;
  margin-bottom: 8px;
}

.site-page h3 {
  font-size: 18px;
  font-weight: normal;
  line-height: 1.4;
}

.site-page p {
  margin-bottom: 14px;
}

.site-page .intro {
  max-width: 740px;
  color: #3d3d3d;
  font-size: 16px;
}

.site-page code {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  background: #f3f3f3;
  padding: 1px 5px;
  border-radius: 2px;
}

.site-page .note,
.site-page .submit-box {
  background: var(--surface);
  border-left: 3px solid var(--line);
  color: var(--muted);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.55;
  padding: 15px 18px;
  margin: 24px 0 42px;
}

.site-page .note strong,
.site-page .section-label,
.site-page .sub-group,
.site-page .refs-label,
.site-page .topic-toc-title,
.site-page .project .meta strong {
  color: var(--faint);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-page .note strong {
  display: block;
  color: var(--text);
  margin-bottom: 8px;
}

.site-page .note p,
.site-page .submit-box p {
  margin-bottom: 8px;
}

.site-page .submit-link {
  display: inline-block;
  color: #fff;
  background: var(--text);
  padding: 8px 13px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.site-page .submit-link:hover {
  color: #fff;
  background: #333;
}

.site-page .topic,
.site-page .project,
.site-page .todo-section,
.site-page .workflow,
.site-page .section-block {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  margin-bottom: 44px;
}

.site-page .topic-toc {
  border: 1px solid var(--line);
  background: var(--surface);
  margin-top: 36px;
  margin-bottom: 48px;
  padding: 18px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

.site-page .topic-toc-part {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  font-weight: 650;
  margin: 10px 0 8px;
}

.site-page .topic-toc a {
  color: var(--muted);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.site-page .topic-toc a:hover {
  color: var(--text);
  text-decoration: underline;
}

.site-page .topic-toc-sub {
  columns: 2;
  column-gap: 34px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-page .topic-toc-sub li {
  break-inside: avoid;
  padding: 2px 0;
}

.site-page .topic-toc-sub a {
  display: block;
}

.site-page .project .meta,
.site-page .todo-meta {
  color: var(--muted);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
  line-height: 1.5;
}

.site-page .project .description {
  color: #3f3f3f;
  font-size: 16px;
}

.site-page .todo-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.site-page .todo-item {
  border-top: 1px solid var(--line-soft);
  padding: 15px 0 16px;
}

.site-page .todo-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.site-page .todo-title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-bottom: 5px;
}

.site-page .todo-title h3 {
  margin: 0;
}

.site-page .tag {
  display: inline-block;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--surface);
  padding: 1px 7px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  font-weight: 650;
  line-height: 1.5;
}

.site-page .todo-item p {
  color: #3f3f3f;
  font-size: 15px;
  line-height: 1.55;
  margin-bottom: 7px;
}

.site-page .todo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
}

.site-page .todo-actions a,
.site-page .todo-actions button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-decoration-color: #cfcfcf;
  text-underline-offset: 2px;
}

.site-page .todo-actions a:hover,
.site-page .todo-actions button:hover {
  color: var(--text);
}

.site-page footer {
  color: var(--faint);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

@media (max-width: 720px) {
  .site-page nav,
  .site-page nav .wrap {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-page .topic-toc-sub {
    columns: 1;
  }
}

@media (max-width: 620px) {
  .site-page .wrap,
  .site-page > h1,
  .site-page > p.intro,
  .site-page > .topic-toc,
  .site-page > .topic,
  .site-page > .note,
  .site-page > footer,
  .site-page nav {
    padding-left: 22px;
    padding-right: 22px;
  }
}