:root {
  --bg: #f7f8fa; --fg: #14181f; --muted: #5b6472;
  --card: #ffffff; --border: #e5e8ec; --accent: #0175C2; --accent-fg: #ffffff;
  --code-bg: #f0f2f5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116; --fg: #e8ebef; --muted: #98a2b3;
    --card: #161b22; --border: #232a33; --accent: #3b9ae1; --accent-fg: #0e1116;
    --code-bg: #1b222b;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--fg); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 24px; }
a { color: var(--accent); }

/* ---- top bar ---- */
.topbar { border-bottom: 1px solid var(--border); position: sticky; top: 0; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); z-index: 10; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -0.02em; font-size: 19px; text-decoration: none; color: var(--fg); }
.logo .dot { width: 12px; height: 12px; border-radius: 3px; background: var(--accent); }
.topnav a { margin-left: 20px; text-decoration: none; color: var(--muted); font-size: 15px; font-weight: 500; }
.topnav a:hover { color: var(--fg); }

/* ---- landing ---- */
.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(30px, 6vw, 48px); line-height: 1.15; letter-spacing: -0.03em; margin: 0 0 18px; }
.lead { font-size: clamp(17px, 2.4vw, 20px); color: var(--muted); max-width: 620px; margin: 0 auto; }
.hero-cta { margin-top: 30px; }
.btn { display: inline-block; background: var(--accent); color: var(--accent-fg); text-decoration: none; font-weight: 600; padding: 11px 20px; border-radius: 10px; }
.btn:hover { filter: brightness(1.06); }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; padding: 24px 0 8px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 22px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.contact { text-align: center; padding: 48px 0 72px; color: var(--muted); }
.contact a { color: var(--accent); text-decoration: none; font-weight: 600; }

/* ---- footer ---- */
.sitefooter { border-top: 1px solid var(--border); padding: 24px 0; text-align: center; color: var(--muted); font-size: 13px; }

/* ---- manual layout ---- */
.manual-layout { max-width: 1080px; display: grid; grid-template-columns: 232px 1fr; gap: 48px; padding-top: 36px; padding-bottom: 56px; align-items: start; }
.manual-nav { position: sticky; top: 80px; font-size: 14.5px; }
.manual-nav-title { font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; font-size: 12px; color: var(--muted); margin: 0 0 10px; }
.manual-nav ol { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.manual-nav li { margin: 0; counter-increment: step; }
.manual-nav li a { display: block; padding: 7px 10px; border-radius: 8px; text-decoration: none; color: var(--muted); border-left: 2px solid transparent; }
.manual-nav li a::before { content: counter(step) ". "; color: var(--border); font-variant-numeric: tabular-nums; }
.manual-nav li a:hover { color: var(--fg); background: var(--card); }
.manual-nav li.active a { color: var(--accent); font-weight: 600; background: var(--card); border-left-color: var(--accent); }
.manual-nav li.active a::before { color: var(--accent); }
/* Section headings inside the sidebar (front-matter `section`). They must not
   advance the page counter. */
.manual-nav li.nav-section { counter-increment: none; margin: 16px 0 4px; padding: 0 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; font-size: 11px; color: var(--muted); }
.manual-nav li.nav-section:first-child { margin-top: 0; }

.manual-content { min-width: 0; }
.manual-h1 { font-size: clamp(26px, 4vw, 34px); letter-spacing: -0.02em; margin: 0 0 6px; }
.manual-lead { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.manual-content h2 { font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 12px; padding-top: 8px; border-top: 1px solid var(--border); }
.manual-content h3 { font-size: 17px; margin: 26px 0 8px; }
.manual-content p, .manual-content li { font-size: 16px; }
.manual-content ul, .manual-content ol { padding-left: 22px; }
.manual-content li { margin: 5px 0; }
.manual-content code { background: var(--code-bg); padding: 2px 6px; border-radius: 5px; font-size: 0.88em; }
.manual-content pre { background: var(--code-bg); padding: 16px; border-radius: 10px; overflow-x: auto; }
.manual-content pre code { background: none; padding: 0; }
.manual-content table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14.5px; display: block; overflow-x: auto; }
.manual-content th, .manual-content td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; vertical-align: top; }
.manual-content th { background: var(--card); }
.manual-content blockquote { margin: 16px 0; padding: 2px 16px; border-left: 3px solid var(--border); color: var(--muted); }

/* role chips */
.roles { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 8px; }
.chip { display: inline-block; font-size: 13px; font-weight: 600; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); }
.chip.admin { color: #b4690e; border-color: #b4690e55; }
.chip.manager { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.chip.worker { color: #2e7d46; border-color: #2e7d4655; }

/* callouts */
.callout { border: 1px solid var(--border); border-left-width: 3px; border-radius: 8px; padding: 4px 16px; margin: 18px 0; background: var(--card); }
.callout > :first-child { margin-top: 10px; } .callout > :last-child { margin-bottom: 10px; }
.callout-tip { border-left-color: #2e7d46; }
.callout-warn { border-left-color: #b4690e; }
.callout-info { border-left-color: var(--accent); }

/* screenshot placeholder */
.shot { margin: 22px 0; }
.shot-frame { position: relative; border: 1px dashed var(--border); border-radius: 12px; background: var(--card); min-height: 180px; overflow: hidden; }
.shot-frame img { display: none; width: 100%; height: auto; }
.shot-frame.is-loaded img { display: block; }
.shot-ph { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 40px 16px; color: var(--muted); text-align: center; min-height: 180px; }
.shot-frame.is-loaded .shot-ph { display: none; }
.shot-ph-icon { font-size: 30px; }
.shot-ph-label { font-weight: 600; font-size: 14px; }
.shot-ph code { background: var(--code-bg); font-size: 12px; padding: 2px 8px; border-radius: 5px; }
.shot figcaption { color: var(--muted); font-size: 13.5px; margin-top: 8px; text-align: center; }

/* pager */
.manual-pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 15px; }
.manual-pager a { text-decoration: none; font-weight: 600; }
.manual-pager .next { margin-left: auto; text-align: right; }

@media (max-width: 720px) {
  .manual-layout { grid-template-columns: 1fr; gap: 20px; }
  .manual-nav { position: static; border-bottom: 1px solid var(--border); padding-bottom: 12px; }
  .manual-nav ol { display: flex; flex-wrap: wrap; gap: 4px; }
  .manual-nav li.active a { border-left: none; }
}