/* 地は白で固定。和文はOSのフォントを使う（Webフォントは読まない）。配色は既定パレットを使わず自前で決める */
:root {
  --bg: #ffffff;
  --ink: #1c1c1e;
  --muted: #66666d;
  --line: #e2e2e6;
  --soft: #f5f5f7;
  --accent: #1f3a5f;
  --accent-ink: #ffffff;
  --ok: #2e6a3c;
  --warn: #9b3412;
  --warn-soft: #fbefe9;
  --radius: 10px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
a { color: var(--accent); }
h1 { font-size: 1.45rem; line-height: 1.4; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
h3 { font-size: 1rem; margin: 1.2rem 0 0.4rem; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.1rem; text-decoration: none; color: var(--ink); letter-spacing: 0.04em; }
.who { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }
.who form { margin: 0; }
.nav { display: flex; gap: 4px; overflow-x: auto; padding: 6px 12px; border-bottom: 1px solid var(--line); background: var(--soft); scrollbar-width: none; }
.nav a { white-space: nowrap; padding: 6px 10px; border-radius: 8px; text-decoration: none; color: var(--ink); font-size: 0.95rem; }
.nav a:hover { background: #fff; }

main { max-width: 960px; margin: 0 auto; padding: 16px; }
main.narrow { max-width: 640px; }
.foot { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; padding: 24px 16px; color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--line); margin-top: 32px; }
.foot a { color: var(--muted); }

.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; margin: 12px 0; background: #fff; }
.card h2 { margin-top: 0.3rem; }
.card.staff { border-color: var(--accent); }
.card.notice { background: var(--soft); }
.flash { background: var(--soft); border-left: 4px solid var(--accent); padding: 8px 12px; border-radius: 6px; }
.flash.warn, .error { background: var(--warn-soft); border-left: 4px solid var(--warn); padding: 8px 12px; border-radius: 6px; color: var(--warn); }
.muted, .hint { color: var(--muted); font-size: 0.9rem; }
.ok { color: var(--ok); font-weight: 600; }
.warn { color: var(--warn); font-weight: 600; }
.dev { border: 1px dashed var(--warn); padding: 6px 10px; border-radius: 6px; }

.badge { display: inline-block; font-size: 0.75rem; padding: 1px 8px; border-radius: 999px; background: var(--soft); border: 1px solid var(--line); color: var(--ink); vertical-align: middle; }
.badge.ok { color: var(--ok); border-color: currentColor; background: #fff; }
.badge.warn { color: var(--warn); border-color: currentColor; background: #fff; }

button, .button {
  display: inline-block; font: inherit; font-size: 0.95rem; padding: 8px 16px; border-radius: 8px;
  border: 1px solid var(--line); background: #fff; color: var(--ink); cursor: pointer; text-decoration: none; min-height: 40px;
}
button:hover, .button:hover { border-color: var(--accent); }
button.primary, .button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
button.danger { color: var(--warn); border-color: var(--warn); }
button.link { border: 0; background: none; color: var(--accent); padding: 0; min-height: 0; text-decoration: underline; }

input, select, textarea {
  font: inherit; font-size: 16px; width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink);
}
input[type="checkbox"], input[type="radio"] { width: auto; }
textarea { resize: vertical; }
.field { display: block; margin: 0 0 12px; border: 0; padding: 0; }
.field .label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 4px; }
fieldset.field legend { padding: 0; margin-bottom: 4px; }
.check { display: flex; gap: 8px; align-items: flex-start; margin: 6px 0; }
.stack { display: block; }
.inline { display: inline-flex; gap: 8px; align-items: flex-end; flex-wrap: wrap; margin: 4px 8px 4px 0; }
.inline .field { margin: 0; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 8px; }
.row .field { flex: 1 1 160px; }
.row .grow { flex: 1 1 auto; }
.filters, .toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 12px; }
.filters input, .filters select { width: auto; flex: 1 1 140px; }
.toolbar .button.primary { margin-left: auto; }

.table { width: 100%; border-collapse: collapse; font-size: 0.93rem; display: block; overflow-x: auto; }
.table th, .table td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { color: var(--muted); font-weight: 600; white-space: nowrap; }
.table.small { font-size: 0.82rem; }
.table pre { white-space: pre-wrap; margin: 0; }

.dl { display: grid; grid-template-columns: 8em 1fr; gap: 4px 12px; margin: 0 0 12px; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; }
@media (max-width: 480px) { .dl { grid-template-columns: 1fr; } .dl dd { margin-bottom: 6px; } }

.list { padding-left: 1.2em; }
.list li { margin: 4px 0; }
.menu { list-style: none; padding: 0; }
.menu li a { display: block; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius); margin: 8px 0; text-decoration: none; }

.events, .posts { list-style: none; padding: 0; margin: 0; }
.events li, .posts li { border-bottom: 1px solid var(--line); padding: 10px 0; }
.events a { display: flex; gap: 12px; text-decoration: none; color: var(--ink); }
.events .when { min-width: 8.5em; font-weight: 600; color: var(--accent); }
.events .title { font-weight: 600; }
.events .meta, .posts .meta, .meta { display: block; color: var(--muted); font-size: 0.85rem; }
.events li.past { opacity: 0.6; }
.events li.cancelled .title { text-decoration: line-through; }
.posts .title { font-weight: 600; font-size: 1.05rem; }
.posts .excerpt { margin: 4px 0 0; color: var(--muted); font-size: 0.92rem; }
.tag { font-size: 0.85rem; }
.article { white-space: normal; line-height: 1.9; }

.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 12px; }
.stat { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; text-decoration: none; color: var(--ink); }
.stat .n { font-size: 1.6rem; font-weight: 700; line-height: 1.2; }
.stat span:last-child { color: var(--muted); font-size: 0.85rem; }
.stat.alert { border-color: var(--warn); }
.stat.alert .n { color: var(--warn); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.tab { padding: 8px 12px; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; }
.tab.on { color: var(--ink); border-color: var(--accent); font-weight: 600; }
.pager { display: flex; justify-content: space-between; margin: 16px 0; }
.code { font-size: 2rem; font-weight: 700; letter-spacing: 0.3em; margin: 8px 0; }
.copy { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9rem; }
.answers li { margin-bottom: 12px; }
.answers .q { color: var(--muted); margin: 0; font-size: 0.9rem; }
.answers .a { margin: 4px 0 0; padding: 8px 12px; background: var(--soft); border-radius: 8px; }
.steps li { margin-bottom: 6px; }
details { margin: 8px 0; }
summary { cursor: pointer; color: var(--accent); }
.report summary { color: var(--muted); font-size: 0.85rem; }
.terms h2 { font-size: 1rem; margin-top: 1.4rem; }
.terms ol, .terms ul { padding-left: 1.4em; }
.terms li { margin: 4px 0; }