/* ==========================================================================
   layout.css - the 2026-11 layout (#21)
   --------------------------------------------------------------------------
   Loaded after parerga.css, which keeps the tokens, type and base styles;
   this file adds the frame and the page designs chosen on the
   layout-prototypes branch:

     1  sidebar        - always open; a top bar with a Menu below 860px
     2  shared         - Words filter strip, year headings, front page
     3  post margin    - blog posts: date, tags, related, contents
     4  paper margin   - the same margin on papers, plus citation
     5  project        - title and facts beside the lead screenshot
     6  sounds         - pieces as video tiles, albums, singles
     7  narrow screens

   The post, paper and project grids switch on the width of the content area
   (container queries), not the window, so they don't depend on the sidebar.
   ========================================================================== */


/* --------------------------------------------------------------------------
   1. Sidebar
   -------------------------------------------------------------------------- */

body {
  border-top: 4px solid var(--accent);   /* the old red drawer handle, as a rule */
  --side-w: 15rem;
  --side-gap: calc(var(--side-w) + 3rem);
  --measure-wide: min(72rem, calc(100vw - var(--side-gap) - 2rem));
}

.sidebar {
  position: fixed;
  top: 4px;      /* below the body's accent rule */
  bottom: 0;
  left: 0;
  width: var(--side-w);
  overflow-y: auto;
  padding: 1.5rem 1.5rem 2rem;
  border-right: 1px solid var(--rule);
  background: var(--paper);
}
.sidebar-name {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink);
}
.sidebar-name:hover { color: var(--accent); text-decoration: none; }
/* on the homepage the name is the page's H1, with the link inside */
h1.sidebar-name { margin: 0; }
h1.sidebar-name a { color: var(--ink); }
h1.sidebar-name a:hover { color: var(--accent); text-decoration: none; }
.sidebar-toggle { display: none; }
.sidebar-intro { margin: .6rem 0 1.5rem; font-size: .85rem; line-height: 1.5; color: var(--muted); }

.sidebar-nav { list-style: none; margin: 0 0 1.5rem; padding: 0; }
.sidebar-nav li { margin: 0; }
.sidebar-nav a {
  display: block;
  padding: .3rem 0 .3rem .75rem;
  border-left: 3px solid transparent;
  font-weight: 700;
  color: var(--ink);
}
.sidebar-nav a:hover { color: var(--accent); text-decoration: none; }
.sidebar-nav a.is-current { border-left-color: var(--accent); }

.sidebar-search {
  display: block;
  width: 100%;
  padding: .35rem .5rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-size: .8rem;
  color: var(--muted);
  text-align: left;
  cursor: pointer;
}
.sidebar-search:hover { border-color: var(--accent); color: var(--ink); }
.sidebar-links {
  margin: 1.25rem 0 0;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.sidebar-links .sep { color: var(--faint); padding: 0 .15rem; }

/* `body` outranks parerga.css's .site-main rules, media queries included,
   which still offset the column for the old drawer */
body .site-main,
body .site-foot {
  margin-left: var(--side-gap);
  padding-right: 1.5rem;
}
body .site-main { padding-top: .5rem; }


/* --------------------------------------------------------------------------
   2. Shared: Words filter, year headings, front page
   -------------------------------------------------------------------------- */

/* Unified Words filter strip (pages/words.html) */
.wfilter { margin: 0 0 var(--step); }
.wfilter-row {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  margin: 0 0 .55rem;
}
.wfilter-chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.wfilter-label {
  flex: 0 0 3.5rem;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.chip {
  display: inline-block;
  padding: .1rem .5rem;
  border: 1px solid var(--rule);
  font-size: .8rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--link);
}
.chip--quiet { font-weight: 400; color: var(--body); }
.chip:hover,
.chip:focus { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.chip.is-current,
.chip.is-current:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip-clear { font-size: .75rem; color: var(--muted); }
.chip-clear:hover { color: var(--accent); }

.wcount {
  margin: 0;
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* plain year headings instead of the ghost numerals: a tag or a "Latest"
   label can no longer be mistaken for another year (#21) */
.wyear {
  margin: calc(var(--step) * 1.5) 0 0;
  padding-bottom: .3rem;
  border-bottom: 2px solid var(--ink);
  font-size: 1.15rem;
  color: var(--ink);
}
/* Events uses them too (pages/events.html); its entries need air below */
.eventslist .wyear { margin-bottom: 1.1rem; }
.eventslist .wyear:first-child { margin-top: .5rem; }


/* Front page (pages/frontpage.html, the unlinked /frontpage/) */
.hub-intro { max-width: var(--measure); margin: calc(var(--step) * 1.75) 0 calc(var(--step) * 1.5); }
.hub-name { margin: 0 0 .5rem; font-size: 2.25rem; }
.hub-lede { margin: 0; font-size: 1.15rem; line-height: 1.55; color: var(--body); }
.hub-lede .hub-about { white-space: nowrap; font-size: .85rem; }

.hub-cols {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 0 3rem;
}
.hub-cols .sectionlabel { margin-top: 0; }
.hub-side .sectionlabel + .hub-list { margin-top: 0; }
.hub-side .hub-more + .sectionlabel { margin-top: calc(var(--step) * 1.25); }

.hub-list { list-style: none; margin: 0; padding: 0; }
.hub-list li { padding: .6rem 0; border-top: 1px solid var(--rule); line-height: 1.35; }
.hub-list li:first-child { border-top: 0; }
.hub-list a { font-weight: 700; }
.hub-list-meta { display: block; margin-top: .15rem; font-size: .75rem; color: var(--muted); }

.hub-more {
  display: inline-block;
  margin: .6rem 0 0;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.hub-projects { margin-top: calc(var(--step) * 2); }
.hub-projects .tilegrid { margin-top: var(--step); }


/* --------------------------------------------------------------------------
   3. Blog posts: the right-hand margin
   -------------------------------------------------------------------------- */

.post { container-type: inline-size; }
.post-head { margin: 0 0 calc(var(--step) * 1.5); max-width: var(--measure); }
.post-head h1 { margin: 0 0 .5rem; font-size: 2.1rem; line-height: 1.15; }
.post-body { min-width: 0; max-width: var(--measure); }

/* small uppercase labels, used in the margins */
.post-rail-label {
  margin: 1.5rem 0 .4rem;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.post-tags { margin: 0; font-size: .85rem; line-height: 1.7; }
.post-tags a { display: inline-block; margin-right: .5rem; }

.post-toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.post-toc li { margin: 0; }
.post-toc a {
  display: block;
  padding: .25rem 0 .25rem .7rem;
  border-left: 2px solid var(--rule);
  font-size: .82rem;
  font-weight: 400;      /* quieter than the site nav: only the section being read is bold */
  line-height: 1.35;
  color: var(--muted);
}
.post-toc a:hover { color: var(--accent); text-decoration: none; }
.post-toc a.is-reading { border-left-color: var(--accent); color: var(--ink); font-weight: 700; }

.post-related { list-style: none; margin: 0; padding: 0; }
.post-related li { padding: .45rem 0; border-top: 1px solid var(--rule); font-size: .88rem; line-height: 1.35; }
.post-related li:first-child { border-top: 0; padding-top: 0; }
.post-related a { font-weight: 700; }
.post-related-date { display: block; margin-top: .1rem; font-size: .72rem; color: var(--muted); }

/* older / newer, two halves */
.post-pager {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin: calc(var(--step) * 2) 0 0;
  padding-top: var(--step);
  border-top: 2px solid var(--ink);
}
.post-pager a { flex: 0 1 48%; font-weight: 700; line-height: 1.3; }
.post-pager span { display: block; margin-bottom: .2rem; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.post-pager-newer { margin-left: auto; text-align: right; }

/* citation, folded into one line */
.post-cite { margin: var(--step) 0 0; font-size: .85rem; }
.post-cite summary {
  display: inline-block;
  cursor: pointer;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.post-cite summary:hover { color: var(--accent); }
.post-cite p { margin: .5rem 0 0; padding-left: .75rem; border-left: 2px solid var(--rule); color: var(--body); }

/* the margin: one compact line under the title when narrow */
.post-margin { display: flex; flex-wrap: wrap; align-items: baseline; gap: .2rem 1rem; margin: 0 0 var(--step); font-size: .85rem; }
.post-margin p { margin: 0; }
.post-margin .post-toc,
.post-margin-related { display: none; }
.post-date { color: var(--muted); }
.post-date b { color: var(--ink); }
.post-side-meta { color: var(--muted); }

/* the margin as a column to the right of the text, once there is room */
@container (min-width: 56rem) {
  .post-grid:has(> .post-margin) {
    display: grid;
    grid-template-columns: minmax(0, var(--measure)) 11rem;
    gap: 0 3rem;
  }
  .post-margin {
    display: block;
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 1.5rem;
    align-self: start;
    max-height: calc(100vh - 3rem);   /* a long margin scrolls inside itself */
    overflow-y: auto;
    margin: 0;
    padding-top: .35rem;
    border-top: 2px solid var(--ink);
  }
  .post-date { font-size: .95rem; }
  .post-date b { display: block; font-size: 1.6rem; line-height: 1.1; }
  .post-side-meta { margin-top: .2rem !important; font-size: .78rem; }
  .post-margin .post-tags { margin-top: 1rem; font-size: .8rem; }
  .post-margin .post-tags a { display: block; margin: 0; }
  .post-margin .post-toc { display: block; margin-top: 1.5rem; }
  .post-margin .post-toc .post-rail-label { margin-bottom: .4rem; }
  /* with a contents list the margin runs the article's full height and only
     the list sticks; date, tags and related scroll away above it */
  .post-margin.has-toc,
  .post-margin.is-static {
    position: static;
    align-self: stretch;
    max-height: none;
    overflow: visible;
  }
  .post-margin.has-toc .post-toc {
    position: sticky;
    top: 1.5rem;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
  }

  /* related posts move into the margin, so the copy after the article goes */
  .post-margin-related { display: block; margin-top: 1.5rem; }
  .post-margin-related .post-rail-label { margin: 0 0 .4rem; }
  .post-margin .post-related li { font-size: .8rem; }
  .post-related-end--dup { display: none; }
}


/* --------------------------------------------------------------------------
   4. Papers: the same margin, with citation
   -------------------------------------------------------------------------- */

/* paper pages (pages/detail-papers.html): the post margin, holding
   venue, project, links, citation and related papers. Wider than a post's,
   since it carries a citation; below the article on narrow screens. */
.post-margin--paper { display: block; order: 1; margin: calc(var(--step) * 2) 0 0; }
.post-grid:has(> .post-margin--paper) { display: flex; flex-direction: column; }
.post-grid > .post-related-end--dup { order: 2; }
.post-margin--paper .post-rail-label { margin: 1.25rem 0 .35rem; }
.post-margin--paper .post-margin-related { margin-top: 0; }
.paper-venue { margin-top: .5rem !important; font-size: .85rem; line-height: 1.4; color: var(--body); }
.paper-project { font-size: .9rem; font-weight: 700; }
.paper-links { list-style: none; margin: 0; padding: 0; font-size: .85rem; line-height: 1.7; }
.paper-cite { font-size: .78rem; line-height: 1.5; color: var(--body); }
.paper-copy {
  margin-top: .5rem;
  padding: .2rem .6rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  font-size: .72rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
}
.paper-copy:hover { border-color: var(--accent); background: var(--accent); color: #fff; }
.paper-abstract-label { margin-top: 0; }
.blogentry.paper-abstract > p:first-of-type { font-size: inherit; font-weight: 400; color: var(--body); }

@container (min-width: 56rem) {
  .post-grid:has(> .post-margin--paper) { display: grid; }
  .post-grid:has(> .post-margin--paper) { grid-template-columns: minmax(0, var(--measure)) 14rem; }
  .post-margin--paper { order: 0; margin: 0; }
}


/* --------------------------------------------------------------------------
   5. Project pages
   -------------------------------------------------------------------------- */

.proj { container-type: inline-size; }
.proj-head {
  margin: 0 0 calc(var(--step) * 2);
  padding-bottom: calc(var(--step) * 1.5);
  border-bottom: 1px solid var(--rule);
}
.proj-title { margin: 0 0 .6rem; font-size: 2.8rem; line-height: 1.05; letter-spacing: -.01em; }
.proj-tagline { margin: 0; max-width: 40rem; font-size: 1.3rem; line-height: 1.4; color: var(--body); }

.proj-facts { display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; margin: 1.75rem 0 0; }
.proj-facts dt {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.proj-facts dd { margin: .2rem 0 0; font-size: .95rem; font-weight: 700; color: var(--ink); }
.proj-facts .project-year { font: inherit; color: inherit; }
.proj-fact-role { flex: 1 1 16rem; }
.proj-fact-role dd { max-width: 26rem; font-weight: 400; color: var(--body); }
.proj-status::before { content: ""; display: inline-block; width: .55rem; height: .55rem; margin-right: .35rem; border-radius: 50%; background: var(--faint); }
.proj-status.is-active::before { background: #1a9e48; }

.proj-links { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.5rem 0 0; }
.proj-button {
  display: inline-block;
  padding: .45rem .9rem;
  border: 2px solid var(--ink);
  font-size: .85rem;
  font-weight: 700;
  color: var(--ink);
}
.proj-button:first-child { background: var(--ink); color: #fff; }
.proj-button:hover,
.proj-button:focus { border-color: var(--accent); background: var(--accent); color: #fff; text-decoration: none; }

.proj-body { max-width: var(--measure); }

.proj-section { margin-top: calc(var(--step) * 2.5); }
.proj-section-title {
  margin: 0 0 var(--step);
  padding-bottom: .3rem;
  border-bottom: 2px solid var(--ink);
  font-size: 1.15rem;
  color: var(--ink);
}
.proj-section-title span { margin-left: .3rem; font-size: .8rem; font-weight: 400; color: var(--muted); }

.proj-writing { max-width: var(--measure); }

.proj-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: 1rem; }
.proj-gallery img,
.proj-lead img {
  display: block;
  width: 100%;
  object-fit: cover;
  object-position: top left;
  border: 1px solid var(--rule);
  background: var(--wash);
}
.proj-gallery img { aspect-ratio: 4 / 3; }
.proj-gallery a:hover img,
.proj-lead:hover img { border-color: var(--accent); }

/* title and facts beside the lead screenshot, once there is room */
.proj-lead { display: block; margin-top: var(--step); }
.proj-lead img { aspect-ratio: 16 / 10; }

@container (min-width: 52rem) {
  .proj-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 0 3rem;
    align-items: start;
  }
  .proj-lead { margin-top: .4rem; }
}


/* --------------------------------------------------------------------------
   6. Sounds
   -------------------------------------------------------------------------- */

.snd-lede { max-width: var(--measure); margin: 0 0 var(--step); font-size: 1.15rem; line-height: 1.55; color: var(--body); }

.snd-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: 2rem 1.25rem; }
.snd-grid--albums { grid-template-columns: repeat(auto-fill, minmax(12rem, 15rem)); }

.snd-tile { display: block; color: var(--ink); }
.snd-tile:hover,
.snd-tile:focus { color: var(--ink); text-decoration: none; }
.snd-tile:hover .snd-title { color: var(--accent); }

.snd-thumb,
.snd-cover { position: relative; display: block; overflow: hidden; background: #111; }
.snd-thumb { aspect-ratio: 16 / 9; }
.snd-cover { aspect-ratio: 1; }
.snd-thumb img,
.snd-cover img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.snd-tile:hover img { transform: scale(1.03); }

/* play mark: a dark disc with a CSS triangle, red on hover */
.snd-play {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 3rem;
  height: 3rem;
  margin: -1.5rem 0 0 -1.5rem;
  border-radius: 50%;
  background: rgba(0, 0, 0, .65);
  transition: background .2s;
}
.snd-play::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 54%;
  border-style: solid;
  border-width: .55rem 0 .55rem .9rem;
  border-color: transparent transparent transparent #fff;
  transform: translate(-50%, -50%);
}
.snd-tile:hover .snd-play { background: var(--accent); }

.snd-cover-type {
  display: flex;
  align-items: flex-end;
  height: 100%;
  padding: 1rem;
  background: var(--accent);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.05;
  color: #fff;
}

.snd-title { display: block; margin-top: .6rem; font-weight: 700; line-height: 1.3; }
.snd-meta { display: block; margin-top: .15rem; font-size: .78rem; font-weight: 400; line-height: 1.4; color: var(--muted); }
/* post openings can run long: two lines at most */
.snd-grid .snd-meta { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.snd-singles { max-width: var(--measure); }


/* --------------------------------------------------------------------------
   7. Narrow screens
   -------------------------------------------------------------------------- */

@media (max-width: 860px) {
  .hub-cols { grid-template-columns: minmax(0, 1fr); }
  .hub-side { margin-top: calc(var(--step) * 1.5); }

  /* the sidebar folds into a top bar with a Menu toggle (js/parerga.js), and
     stops reserving its column in the wide-page width */
  body { --side-gap: 0px; }
  .sidebar {
    position: static;
    width: auto;
    padding: 1rem 1.25rem;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }
  .sidebar-head { display: flex; align-items: center; justify-content: space-between; }
  .sidebar-name { font-size: 1.1rem; }
  .sidebar-toggle {
    display: inline-block;
    padding: .2rem .6rem;
    border: 1px solid var(--ink);
    background: var(--paper);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ink);
  }
  .sidebar-body { display: none; padding-top: .5rem; }
  .sidebar.is-open .sidebar-body { display: block; }
  body .site-main,
  body .site-foot { margin-left: 0; padding-left: 1.25rem; padding-right: 1.25rem; }
}

@media (max-width: 560px) {
  .hub-name { font-size: 1.75rem; }
  .hub-lede { font-size: 1.05rem; }
  .wfilter-row { flex-direction: column; gap: .3rem; }
}