:root {
  --bg: #fff; --fg: #1a1d21; --muted: #5c6670; --line: #e3e6ea;
  --accent: #1f6feb; --accent-fg: #fff; --tag: #eef2f6;
  --max: 880px; --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); line-height: 1.55; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem;
  padding: .75rem 1.25rem; border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); }
.nav { display: flex; flex-wrap: wrap; gap: .85rem; font-size: .92rem; }
.nav a { color: var(--muted); text-transform: capitalize; }

.content { max-width: var(--max); margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.site-footer {
  max-width: var(--max); margin: 0 auto; padding: 1.5rem 1.25rem;
  border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem;
}
.site-footer .fine { font-size: .78rem; }

.hero h1 { font-size: 1.9rem; margin: .2rem 0; }
.cta { font-weight: 600; }

.cards { list-style: none; padding: 0; display: grid; gap: .75rem; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.cards a { display: flex; justify-content: space-between; align-items: center; padding: .9rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); color: var(--fg); text-transform: capitalize; }
.cards a:hover { border-color: var(--accent); text-decoration: none; }
.card-count { color: var(--muted); font-variant-numeric: tabular-nums; }

.manual-list { list-style: none; padding: 0; display: grid; gap: .5rem; }
.manual-list a { display: block; padding: .7rem .9rem; border: 1px solid var(--line); border-radius: var(--radius); color: var(--fg); }
.manual-list a:hover { border-color: var(--accent); text-decoration: none; }
.ml-heading { font-weight: 600; display: block; }
.ml-title { color: var(--muted); font-size: .9rem; display: block; }
.ml-meta { color: var(--muted); font-size: .82rem; }

.manual-head h1 { margin-bottom: .15rem; }
.manual-head .subtitle { color: var(--muted); margin-top: 0; }
.meta { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; color: var(--muted); font-size: .9rem; }
.tag { background: var(--tag); padding: .1rem .55rem; border-radius: 999px; text-transform: capitalize; }
.badge-no-ocr { background: #fff4e5; color: #8a5a00; padding: .1rem .5rem; border-radius: 999px; font-size: .78rem; }

.provenance { display: grid; grid-template-columns: max-content 1fr; gap: .25rem 1rem; font-size: .92rem; }
.provenance dt { color: var(--muted); }
.provenance dd { margin: 0; }

.pdf-viewer { border: 1px solid var(--line); border-radius: var(--radius); margin: 1rem 0; overflow: hidden; }
.pdf-toolbar { display: flex; align-items: center; gap: .6rem; padding: .5rem .75rem; background: #f7f9fb; border-bottom: 1px solid var(--line); font-size: .9rem; }
.pdf-toolbar button { border: 1px solid var(--line); background: #fff; border-radius: 6px; padding: .25rem .6rem; cursor: pointer; }
.pdf-download { margin-left: auto; font-weight: 600; }
.pdf-canvas-wrap { overflow: auto; max-height: 80vh; text-align: center; background: #525659; padding: .75rem; }
.pdf-canvas-wrap canvas { max-width: 100%; height: auto; background: #fff; box-shadow: 0 1px 6px rgba(0,0,0,.4); }

.ad-slot { margin: 1.25rem 0; }
.ad-placeholder { border: 1px dashed var(--line); border-radius: var(--radius); color: var(--muted); text-align: center; padding: 1.1rem; font-size: .8rem; letter-spacing: .03em; text-transform: uppercase; }