@layer base {
  body { grid-template-rows: auto 1fr auto; }
}

@layer components {
  /* neferbar: black bars; one accent block (top left) with a 4-cell stepped fade.
     The fade is four hard-edged 1ch cells (not a blend): it is the bar's own glyph-grid look. */
  .bar {
    display: flex; align-items: stretch; column-gap: 1ch;
    height: var(--bar-h); line-height: var(--bar-h);
    background: var(--bar); color: var(--bar-ink);
    white-space: nowrap; overflow: hidden;
    position: sticky; z-index: 20;
    & a { text-decoration: none; }
    & a:hover { text-decoration: underline; }
    & :focus-visible { outline-color: var(--accent); outline-offset: -2px; }
    & .blk { background: var(--accent); color: var(--on-accent); font-weight: bold; padding: 0 1ch; }
    & .fade {
      flex: none; width: 4ch; margin-left: -1ch;
      background: linear-gradient(to right,
        var(--fade-1) 0 25%, var(--fade-2) 25% 50%, var(--fade-3) 50% 75%, var(--fade-4) 75%);
    }
  }

  .top {
    top: 0;
    & .crumbs ol { display: flex; }
    & .crumbs li + li::before { content: "/"; color: var(--bar-dim); padding: 0 .5ch; }
    & .crumbs [aria-current] { color: #fff; font-weight: bold; }
    & .secs { margin-left: 2ch; overflow: hidden; }
    & .secs ul { display: flex; }
    & .secs li + li::before { content: "/"; color: var(--bar-dim); }
    & .secs a { display: inline-block; padding: 0 1ch; color: var(--bar-dim); }
    & .secs a:hover { color: var(--bar-ink); }
    & .secs a::first-letter { text-decoration: underline; }
    & .secs a[aria-current] { color: #fff; font-weight: bold; }
    & .secs a[aria-current]::before { content: "▸ "; }
    & .ref { flex: none; margin-left: auto; padding-right: 1ch; color: #fff; font-weight: bold; }
    & .ref .sha { font-weight: normal; color: var(--bar-dim); }
    & .ref:hover { text-decoration: underline; }
  }

  .status {
    bottom: 0; font-size: var(--fs-s);
    padding: 0 1ch;
    & > span, & .st-cmd { color: var(--bar-dim); }
    & .mode { color: #fff; font-weight: bold; }
    & .st-ctx { color: var(--bar-ink); }
    & .st-cmd { flex: none; }
    & .st-cmd .hi, & .st-cmd:hover { color: #fff; font-weight: bold; }
    & .st-sel { color: var(--bar-ink); }
    & .st-flash:empty { display: none; }
    & .st-flash { color: #fff; font-weight: bold; }
    & .st-hints { margin-left: auto; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
    & .st-live::before { content: "○ "; }
    & .st-live[data-state="live"] { color: var(--bar-ink); }
    & .st-live[data-state="live"]::before { content: "● "; }
    & .st-owner { flex: none; display: flex; gap: 1ch; }
    & .st-owner span { color: var(--bar-ink); }
    & .st-owner button { color: var(--bar-dim); }
    & .st-owner button:hover { color: #fff; text-decoration: underline; }
    & .st-pos { min-width: 7ch; text-align: right; color: var(--bar-ink); }
  }

  /* work area: content + context rail.
     Tables and code take the free width and the rail is fixed; on prose pages the text
     is capped at the reading measure and the rail takes the rest, so no column is idle. */
  .work { min-width: 0; }
  .rail { padding: 0 var(--pad) var(--lh); min-width: 0; }
  @media (min-width: 1100px) {
    /* app shell: the bars stay put, the content and the rail scroll on their own, so each
       column has its scrollbar at its own edge (the README's sits next to the README) */
    body { height: 100dvh; overflow: hidden; }
    .work { display: grid; grid-template-columns: minmax(0, 1fr); min-height: 0; }
    .work.has-rail { grid-template-columns: minmax(0, 1fr) var(--rail); }
    .work.has-rail.read { grid-template-columns: minmax(0, calc(var(--measure) + 2 * var(--pad))) minmax(var(--rail), 1fr); }
    main, .rail { min-height: 0; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--rule) transparent; }
    main:focus { outline: none; }
    .rail { border-left: 1px solid var(--rule); }
    :root { --stick: 0px; }
  }
  .rail-d > summary { display: none; }
  @media (max-width: 1099.98px) {
    /* the rail folds into one line above the content */
    .work.has-rail { display: flex; flex-direction: column; }
    .rail { order: -1; border-bottom: 1px solid var(--rule); padding-bottom: 0; }
    .rail-d > summary {
      display: block; list-style: none; color: var(--ink-dim);
      overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
    }
    .rail-d > summary::-webkit-details-marker { display: none; }
    .rail-d > summary::before { content: "▸ "; color: var(--ink); }
    .rail-d[open] > summary::before { content: "▾ "; }
    .rail-d[open] { padding-bottom: var(--lh); }
  }
  @media (max-width: 700px) {
    /* the sections drop to a second bar row instead of being cut off */
    .top { flex-wrap: wrap; height: auto; }
    .top .secs { order: 10; flex-basis: 100%; margin: 0; border-top: 1px solid #202020; }
    .top .crumbs { flex: 1; min-width: 0; overflow: hidden; }
    .status .st-hints, .status .st-ctx { display: none; }
    .list .c-who, .list .c-desc, .list .c-sub, .list .c-ref, .list .c-size, .list .c-lang { display: none; }
  }

  /* rail blocks: a dim title rule, then key/value rows on the character grid */
  .rail section { margin-top: var(--lh); }
  .rail h2 {
    display: flex; gap: 1ch; color: var(--ink-dim); font-weight: normal;
    &::after { content: ""; flex: 1; align-self: center; border-top: 1px solid var(--rule); }
  }
  .kv {
    display: grid; grid-template-columns: 11ch minmax(0, 1fr); column-gap: 1ch;
    & dt { color: var(--ink-mute); }
    & dd { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  }
  .outline {
    & a { display: block; text-decoration: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    & a:hover { text-decoration: underline; }
    & .l1 { font-weight: bold; }
    & .l3 { padding-left: 2ch; }
    & .l4, & .l5, & .l6 { padding-left: 4ch; }
    & a[aria-current]::before { content: "▸"; margin-left: -1ch; }
  }
  .rail .clone { border: 0; padding: 0; margin-top: 0; }
  .rail .clone-line { flex-wrap: wrap; }
}