/* 記事・トップ共通。画像、外部フォント、スクリプトへの依存なし。 */
:root {
  color-scheme: light;
  --paper: #ffffff;
  --ink: #242424;
  --muted: #595959;
  --accent: #8b3b22;
  --line: #cecece;
  --soft: #f5f5f3;
  --font-body: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans CJK JP", sans-serif;
  --measure: 47rem;
}
* { box-sizing: border-box; }
html { font-family: var(--font-body); color: var(--ink); background: var(--paper); line-height: 1.9; overflow-wrap: anywhere; }
body { margin: 0; font-size: 1rem; }
.site-wrap { width: min(100% - 2rem, var(--measure)); margin: 0 auto; padding: 2rem 0 3rem; }
a { color: var(--accent); text-underline-offset: .2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.skip-link { position: absolute; top: -6rem; left: 1rem; background: var(--paper); padding: .65rem 1rem; z-index: 10; }
.skip-link:focus { top: .5rem; }
h1, h2, h3 { line-height: 1.55; font-weight: 700; }
h1 { margin: .7rem 0 1rem; font-size: clamp(1.55rem, 4vw, 2rem); letter-spacing: .015em; }
h2 { font-size: 1.3rem; margin: 2.7rem 0 1rem; padding-bottom: .35rem; border-bottom: 1px solid var(--line); }
h3 { font-size: 1.075rem; margin: 1.7rem 0 .6rem; }
p { margin: .8rem 0; }
ul, ol { padding-left: 1.4rem; }
li { margin: .6rem 0; }
.category, .tag { display: inline-block; color: var(--accent); font-size: .8rem; line-height: 1.5; border: 1px solid currentColor; padding: .1rem .4rem; }
.category { margin: 0; }
.meta, .note { color: var(--muted); font-size: .9rem; }
.meta { line-height: 1.75; }
.summary { margin-top: 1.8rem; padding: .2rem 0 .2rem 1rem; border-left: 3px solid var(--accent); }
.summary h2 { font-size: 1rem; margin: 0 0 .55rem; padding: 0; border: 0; }
.summary p { margin: .45rem 0; }
.symptoms dt { font-weight: 700; margin-top: 1.4rem; }
.symptoms dd { margin: .4rem 0 0; }
.callout { background: var(--soft); border: 1px solid var(--line); border-left: 3px solid var(--accent); padding: .35rem 1rem; margin: 1.25rem 0; }
.table-wrap { max-width: 100%; overflow-x: auto; margin: 1rem 0; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; line-height: 1.7; }
caption { text-align: left; font-weight: 700; padding: 0 0 .6rem; color: var(--muted); }
th, td { border: 1px solid var(--line); padding: .6rem .65rem; text-align: left; vertical-align: top; overflow-wrap: anywhere; }
thead th { background: var(--soft); }
tbody th { font-weight: 600; }
.thread-voices { list-style: none; padding: 0; }
.thread-voices li { border-left: 2px solid var(--line); padding: .4rem 0 .4rem 1rem; margin: 1rem 0; }
.history { padding-left: 1.4rem; }
.history li { padding-left: .25rem; margin: 1.2rem 0; }
.history time { color: var(--muted); font-size: .9rem; }
.sources { font-size: .9rem; }
.sources li { margin: .9rem 0; }
.site-footer { border-top: 1px solid var(--line); margin-top: 2.6rem; padding-top: .9rem; font-size: .85rem; color: var(--muted); }
.site-footer h2 { font-size: .95rem; border: 0; padding: 0; margin: .5rem 0; }
.site-name { font-size: 1.8rem; margin: 0; }
.site-intro { color: var(--muted); font-size: .9rem; }
.now { border-top: 3px solid var(--accent); margin-top: 1.8rem; padding-top: .1rem; }
.now h2 { border: 0; margin: 1rem 0; padding: 0; }
.deadline-list, .post-list, .guide-list { list-style: none; padding: 0; }
.deadline-list > li, .post-list > li, .guide-list > li { border-bottom: 1px solid var(--line); padding: .9rem 0; margin: 0; }
.deadline-list strong { font-size: 1.05rem; }
.deadline-list p, .guide-list p { margin: .35rem 0 0; }
.post-date { font-variant-numeric: tabular-nums; color: var(--muted); font-size: .85rem; margin-right: .55rem; }
.status { color: var(--accent); font-size: .85rem; }
.audience { margin: 1.3rem 0; }
.audience dt { font-weight: 700; display: inline; }
.audience dd { display: inline; margin: 0; }
.audience div { margin: .55rem 0; }
.plain-note { border: 1px solid var(--line); padding: .65rem .8rem; font-size: .9rem; color: var(--muted); }
@media (max-width: 40rem) {
  .site-wrap { padding-top: 1.3rem; }
  h2 { margin-top: 2.3rem; font-size: 1.2rem; }
  .wide-only { display: none; }
  th, td { padding: .5rem .45rem; }
  table { font-size: .85rem; }
}
@media print {
  .site-wrap { width: 100%; max-width: none; padding: 0; }
  .skip-link { display: none; }
  body { font-size: 10pt; }
  h2, h3 { break-after: avoid; }
  tr { break-inside: avoid; }
  a { color: var(--ink); }
}

/* 共通ナビと欄。本文の後に置き、900px以上で右欄へ。 */
.site-layout { max-width: 72rem; width: calc(100% - 2rem); }
.site-content { min-width: 0; }
.site-nav { display: flex; flex-wrap: wrap; gap: .2rem .45rem; font-size: .9rem; margin: .7rem 0 1.2rem; }
.site-nav a[aria-current] { font-weight: 700; text-decoration-thickness: 2px; }
.site-sidebar { min-width: 0; border-top: 1px solid var(--line); margin-top: 2rem; font-size: .9rem; }
.site-sidebar h2 { font-size: 1rem; margin-top: 1.4rem; }
.site-sidebar ul { list-style: none; padding: 0; }
.site-sidebar li { margin: .7rem 0; }
.pagination { border-top: 1px solid var(--line); margin-top: 1.4rem; padding-top: .7rem; display: flex; gap: 1rem; }
@media (min-width: 900px) {
  .site-layout { display: grid; grid-template-columns: minmax(0, 47rem) minmax(12rem, 1fr); gap: 2.5rem; }
  .site-sidebar { border-top: 0; border-left: 1px solid var(--line); padding-left: 1.5rem; margin-top: 0; }
}
@media print { .site-layout { display: block; } .site-nav, .site-sidebar { display: none; } }