/* Mobile-first, no framework. */
:root {
  --bg: #fafaf7;
  --fg: #222;
  --muted: #666;
  --accent: #2f5d8a;
  --line: #ddd;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
* { box-sizing: border-box; }
body { margin: 0; }
main { padding: 0.75rem; max-width: 60rem; margin: 0 auto; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--line); background: #fff;
}
.topbar h1 { font-size: 1.1rem; margin: 0; }
.user { font-size: 0.85rem; color: var(--muted); display: flex; gap: 0.5rem; align-items: center; }
button, .button, select {
  font: inherit; padding: 0.55rem 0.9rem; border: 1px solid var(--line); border-radius: 0.5rem;
  background: #fff; color: var(--fg); cursor: pointer; min-height: 2.5rem;
}
button.link { border: none; background: none; color: var(--accent); padding: 0.25rem; min-height: auto; }
.toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.5rem 0; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 0.25rem; font-size: 0.95rem; }
.breadcrumbs button { padding: 0.25rem 0.5rem; min-height: auto; border: none; color: var(--accent); background: none; }
.items { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.items li { border-bottom: 1px solid var(--line); }
.items button {
  width: 100%; text-align: left; border: none; border-radius: 0; background: none;
  display: flex; gap: 0.6rem; align-items: center; padding: 0.75rem 0.25rem;
}
.items .icon { width: 1.5rem; text-align: center; }
.items .name { flex: 1; overflow-wrap: anywhere; }
.items .meta { color: var(--muted); font-size: 0.8rem; white-space: nowrap; }
.status { color: var(--muted); min-height: 1.2rem; margin: 0.25rem 0; }
.error { color: #b00020; }
progress { width: 100%; }
.viewer-bar {
  position: sticky; top: 0; background: var(--bg); display: flex; flex-wrap: wrap;
  gap: 0.5rem; align-items: center; padding: 0.25rem 0; border-bottom: 1px solid var(--line);
}
.viewer-title { flex: 1; font-weight: 600; overflow-wrap: anywhere; }
.viewer-body { padding: 0.5rem 0; }
.viewer-body canvas { display: block; max-width: 100%; height: auto; margin: 0 auto; box-shadow: 0 1px 4px #0002; background: #fff; }
.markdown { line-height: 1.6; overflow-wrap: anywhere; }
.markdown pre { overflow-x: auto; background: #f0f0ec; padding: 0.75rem; border-radius: 0.4rem; }
.markdown img { max-width: 100%; }
.markdown table { border-collapse: collapse; display: block; overflow-x: auto; }
.markdown td, .markdown th { border: 1px solid var(--line); padding: 0.3rem 0.5rem; }
@media (min-width: 48rem) {
  main { padding: 1rem 1.5rem; }
  .topbar h1 { font-size: 1.3rem; }
}