/* 公開ハブ (atsurokishii.com) の CSS 1 枚。色は司令室の DESIGN.md §2 のトークン (accent #0d75bb / ink #37352f / line #e5e5e5 /
   surface-sunken #f5f5f5) と同じ値。JS 無し・フォントは OS のゴシック (Plex は読ませない = 軽さ優先)。 */
:root {
  --accent: #0d75bb; --accent-700: #0a5a90; --ink: #37352f; --ink-muted: #6b6b66;
  --surface: #ffffff; --surface-sunken: #f5f5f5; --line: #e5e5e5;
}
* { box-sizing: border-box; }
html { font-size: 17px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); background: var(--surface); line-height: 1.85;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-feature-settings: "palt";
}
header.site, main, footer.site { max-width: 42rem; margin: 0 auto; padding: 0 1.25rem; }
header.site { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .5rem 1rem; padding-top: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
header.site .brand { font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
header.site nav { display: flex; gap: 1rem; font-size: .95rem; }
header.site nav a { color: var(--ink-muted); text-decoration: none; padding-bottom: .15rem; border-bottom: 2px solid transparent; }
header.site nav a:hover, header.site nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }
main { padding-top: 2rem; padding-bottom: 3rem; }
h1 { font-size: 1.7rem; line-height: 1.35; margin: 0 0 1.5rem; }
h2 { font-size: 1.25rem; line-height: 1.4; margin: 2.5rem 0 .75rem; padding-bottom: .3rem; border-bottom: 1px solid var(--line); }
h3 { font-size: 1.05rem; margin: 1.75rem 0 .5rem; }
p, ul, ol, table, blockquote, pre { margin: 0 0 1.1rem; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .15em; }
a:hover { color: var(--accent-700); }
ul, ol { padding-left: 1.4rem; }
li + li { margin-top: .25rem; }
blockquote { margin-left: 0; padding: .25rem 1rem; border-left: 3px solid var(--line); color: var(--ink-muted); }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: .9em; background: var(--surface-sunken); padding: .1em .35em; border-radius: 4px; }
pre { background: var(--surface-sunken); padding: 1rem; border-radius: 8px; overflow-x: auto; line-height: 1.6; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; display: block; overflow-x: auto; }
th, td { text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; background: var(--surface-sunken); }
th:first-child, td:first-child { word-break: keep-all; } /* 期間・柱名の列を 1 字ずつ折らない (375px の実走で「2015 〜 2017 年」が 4 行になった) */
img { max-width: 100%; height: auto; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
footer.site { padding-top: 1rem; padding-bottom: 2.5rem; border-top: 1px solid var(--line); font-size: .9rem; color: var(--ink-muted); }
footer.site p { margin: 0 0 .25rem; }
.muted { color: var(--ink-muted); }
@media (max-width: 480px) {
  html { font-size: 16px; }
  header.site { padding-top: 1rem; }
  header.site nav { gap: .75rem; font-size: .9rem; }
  h1 { font-size: 1.45rem; }
}