:root {
  --ink: #1c1c1a; --muted: #6b6a64; --line: #e3e1d9; --paper: #f6f4ee; --card: #fff;
  --ok: #2f7d55; --warn: #b5751a; --crit: #b23b2e;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.8; -webkit-font-smoothing: antialiased; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px 80px; }

.site-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.brand svg { display: block; }
.brand span { font-size: 19px; letter-spacing: -0.01em; }
.brand b { font-weight: 700; color: var(--ink); }
.brand i { font-weight: 400; font-style: normal; color: var(--ink); }
.header-right { display: flex; align-items: center; gap: 16px; }
.site-header a.cta-link { font-size: 14px; font-weight: 600; color: var(--ok); text-decoration: none; }
.lang { display: flex; font-family: var(--mono); font-size: 12.5px; }
.lang button { border: 1px solid var(--line); background: var(--card); color: var(--muted); padding: 3px 9px; cursor: pointer; }
.lang button:first-child { border-radius: 5px 0 0 5px; }
.lang button:last-child { border-radius: 0 5px 5px 0; border-left: none; }
.lang button[aria-pressed="true"] { color: var(--ink); background: var(--paper); font-weight: 600; }

.crumb { font-size: 13px; color: var(--muted); margin: 22px 0 6px; }
.crumb a { color: var(--muted); }

h1 { font-size: 28px; font-weight: 700; line-height: 1.4; letter-spacing: -0.01em; margin: 10px 0 6px; }
.lead { font-size: 16px; color: var(--muted); margin: 0 0 8px; }
.updated { font-size: 12.5px; color: var(--muted); font-family: var(--mono); margin-bottom: 28px; }
h2 { font-size: 20px; font-weight: 700; margin: 40px 0 12px; padding-top: 8px; }
h3 { font-size: 16.5px; font-weight: 600; margin: 26px 0 8px; }
p { margin: 12px 0; }
strong { font-weight: 600; }
code { font-family: var(--mono); font-size: 0.9em; background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
ul, ol { padding-left: 1.3em; }
li { margin: 6px 0; }

.callout { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--warn); border-radius: 10px; padding: 14px 18px; margin: 22px 0; font-size: 15px; }
.callout.ok { border-left-color: var(--ok); }
.callout.crit { border-left-color: var(--crit); }

.cta { background: var(--ink); color: var(--paper); border-radius: 12px; padding: 22px 24px; margin: 36px 0; }
.cta h2 { color: var(--paper); margin: 0 0 6px; font-size: 18px; padding: 0; }
.cta p { color: #cfccc3; margin: 0 0 14px; font-size: 14.5px; }
.cta a { display: inline-block; background: var(--ok); color: #fff; text-decoration: none; font-weight: 700; font-size: 15px; padding: 11px 22px; border-radius: 8px; }

.related { margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--line); }
.related h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin: 0 0 12px; padding: 0; }
.cardlink { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin-bottom: 10px; text-decoration: none; color: var(--ink); }
.cardlink:hover { border-color: var(--ink); }
.cardlink .t { font-weight: 600; font-size: 15.5px; }
.cardlink .d { font-size: 13.5px; color: var(--muted); margin-top: 3px; }

.hub-intro { font-size: 16px; color: var(--muted); margin: 22px 0 30px; }
.site-footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); }
.site-footer a { color: var(--muted); margin: 0 8px 0 0; text-decoration: none; }