/* ViZZ reader — Mirador 4 chrome.
   Values measured in design_handoff_vizz/prototype/ViZZ-v5-offline.html and
   design_handoff_vizz/03-reader-mirador4.md section 1. Loaded only on the
   reader route, after vizz-tokens.css.

   The prototype computes two things in JS that are variables here:
     ink    = #fbfcf7 (dark ground) | #23261f (light ground)
     mix(p) = ink at p% alpha, written rgba(var(--ink-rgb), .p) rather than
              color-mix() — see the theme block below for why
   The page header stays light in both themes; the rail, stage, bars and
   metadata panel all follow the ground. */

/* ── theme ────────────────────────────────────────────────────────── */

.vizz-reader {
  /* Light is the first-visit ground. The prototype defaulted to dark, but a
     visitor's own choice is remembered from then on — see the inline restore
     in citac.html. */
  --ink: var(--reader-ink-light);
  /* The same ink as a channel triplet, for the soft values below. See the note
     at the top of vizz-shell.css: color-mix() is dropped whole where it is not
     supported, which turned every softened border and caption to full ink —
     the reader's header pills lost their border entirely and fell back to the
     browser's default two-tone button chrome. rgba() is identical output and
     universally supported. It has to be declared per ground, because --ink is. */
  --ink-rgb: 35, 38, 31;            /* --reader-ink-light  #23261f */
  --stage-bg: var(--reader-bg-light);
}

.vizz-reader[data-ground="dark"] {
  --ink: var(--reader-ink-dark);
  --ink-rgb: 251, 252, 247;         /* --reader-ink-dark   #fbfcf7 */
  --stage-bg: var(--color-neutral-900);
}

/* ── shell ────────────────────────────────────────────────────────── */

/* The spec gives the grid `calc(100vh - 108px)`, 108px being the header band.
   A flex column is identical when the header is 108px, but the spec also says
   the header wraps, and a fixed offset overflows as soon as it does. */
.vizz-reader {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--stage-bg);
}

.vizz-reader-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr) minmax(300px, 380px);
}

.vizz-reader[data-meta="closed"] .vizz-reader-grid {
  grid-template-columns: 104px minmax(0, 1fr) 0px;
}

.vizz-reader[data-fullscreen="true"] {
  position: fixed;
  inset: 0;
  z-index: 90;
}

/* ── page header (light in both themes) ───────────────────────────── */

.vizz-reader-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 14px clamp(16px, 3vw, 40px);
  background: var(--color-bg);
  color: var(--color-text);
}

.vizz-reader-back {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent-700);
  text-decoration: none;
  white-space: nowrap;
}
.vizz-reader-back:hover { color: var(--color-accent-800); text-decoration: underline; }

.vizz-reader-kicker {
  font-size: 12px;
  color: rgba(var(--color-text-rgb), 0.55);
  white-space: nowrap;
}

.vizz-reader-title {
  font-size: 12px;
  font-weight: 600;
  max-width: 44ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.vizz-reader-controls {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

/* Header pills sit on the light band, so they use --color-text, not --ink. */
.vizz-hdr-pill {
  cursor: pointer;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  background: transparent;
  border: 1px solid rgba(30, 33, 26, 0.16);
  color: var(--color-text);
  white-space: nowrap;
}
.vizz-hdr-pill:hover { background: rgba(var(--color-text-rgb), 0.06); }
.vizz-hdr-pill[aria-pressed="true"] {
  border-color: var(--color-accent);
  color: var(--color-accent-700);
}

/* ── stage bars ───────────────────────────────────────────────────── */

.vizz-stage-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--stage-bg);
  color: var(--ink);
}

.vizz-bar {
  display: flex;
  align-items: center;
  padding: 10px 20px;
  flex-wrap: wrap;
}
.vizz-bar-top {
  gap: 8px;
  border-bottom: 1px solid rgba(var(--ink-rgb), 0.18);
}
.vizz-bar-bottom {
  gap: 10px;
  border-top: 1px solid rgba(var(--ink-rgb), 0.18);
}

.vizz-modes { display: flex; gap: 8px; }
.vizz-bar-right { margin-left: auto; display: flex; align-items: center; gap: 6px; }

/* View-mode tab. The prototype puts #fbfcf7 on the accent fill, but the
   handoff CLAUDE.md is explicit that ink on accent fills is #23261f and that
   getting it wrong fails contrast — so the token wins over the prototype. */
.vizz-tab {
  cursor: pointer;
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid rgba(var(--ink-rgb), 0.3);
  background: transparent;
  color: var(--ink);
  white-space: nowrap;
}
.vizz-tab[aria-pressed="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.vizz-circle {
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(var(--ink-rgb), 0.26);
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 17px;
  font-weight: 600;
  line-height: 1;
}
.vizz-circle:disabled { opacity: .35; cursor: not-allowed; }

.vizz-pill {
  cursor: pointer;
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(var(--ink-rgb), 0.26);
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.vizz-pill[aria-pressed="true"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.vizz-zoom-label {
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  min-width: 48px;
  text-align: center;
}

.vizz-page-label { color: var(--ink); font-size: 12px; font-weight: 600; }
.vizz-hint { color: rgba(var(--ink-rgb), 0.45); font-size: 11px; }
.vizz-note {
  margin-left: auto;
  color: rgba(var(--ink-rgb), 0.55);
  font-size: 11px;
}

/* ── page rail ────────────────────────────────────────────────────── */

.vizz-rail {
  border-right: 1px solid rgba(var(--ink-rgb), 0.18);
  padding: 14px 10px;
  overflow-y: auto;
  min-height: 0;
  background: var(--stage-bg);
  color: var(--ink);
}

.vizz-rail-label {
  font-size: 9.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(var(--ink-rgb), 0.55);
  margin-bottom: 10px;
}

.vizz-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vizz-rail-item {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: #201e1d;
  border-radius: var(--radius-sm);
  aspect-ratio: 3 / 2;
  overflow: hidden;
  cursor: pointer;
  outline: 1px solid rgba(var(--ink-rgb), 0.25);
}
.vizz-rail-item[aria-current="true"] { outline: 2px solid var(--color-accent); }
.vizz-rail-item[data-has-scan="false"] { opacity: .25; cursor: default; }

.vizz-rail-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.vizz-rail-chip {
  position: absolute;
  left: 0;
  bottom: 0;
  background: var(--color-text);
  color: #fbfcf7;
  font-size: 9px;
  font-weight: 600;
  padding: 2px 5px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── stage ────────────────────────────────────────────────────────── */

/* Mirador sizes itself to this element, and this element is a flex child of
   .vizz-stage-wrap. Without flex:1 it collapses to its content height — and
   its content is Mirador at height:100% of that zero, so nothing paints. */
/* Two stacked layers: Mirador underneath, the two-up over it. The stage is
   never display:none — OpenSeadragon reads its container size when shown, and
   a zero-sized container leaves getHomeZoom() meaningless, which is what made
   the zoom readout report 0% and 40000%. */
.vizz-stage-area {
  position: relative;
  flex: 1;
  min-width: 0;
  min-height: 0;
  background: var(--stage-bg);
}

#vizz-stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: var(--stage-bg);
  color: var(--ink);
}
#vizz-stage > div { height: 100%; }

.vizz-stage-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 40px;
  text-align: center;
  font-size: 14px;
  color: rgba(var(--ink-rgb), 0.7);
}

/* ── two-up (Lice + naličje) ──────────────────────────────────────── */

/* An author `display` beats the hidden attribute's UA `display:none`, so the
   attribute has to be honoured explicitly or the panel never hides. */
.vizz-twoup[hidden] { display: none; }

.vizz-twoup {
  position: absolute;
  inset: 0;
  z-index: 2;
  overflow: auto;
  display: flex;
  align-items: safe center;
  justify-content: safe center;
  padding: 36px 28px;
  gap: 6px;
  background: var(--stage-bg);
}

.vizz-twoup figure {
  margin: 0;
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.vizz-twoup img {
  display: block;
  flex: none;
  border-radius: 3px;
  box-shadow: 0 10px 30px rgba(35, 38, 31, .18);
  cursor: zoom-in;
  /* the container handles drag-to-pan itself */
  user-select: none;
  -webkit-user-drag: none;
}

.vizz-twoup { cursor: grab; }
.vizz-twoup:active { cursor: grabbing; }
.vizz-reader[data-ground="dark"] .vizz-twoup img {
  box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

/* Zoom is a multiplier on the fitted size; the container scrolls past 100%. */
.vizz-twoup[data-fit="width"] img {
  width: calc(var(--twoup-zoom, 1) * (50vw - 120px));
  height: auto;
  max-width: none;
}
.vizz-twoup[data-fit="height"] img {
  height: calc(var(--twoup-zoom, 1) * (100dvh - 300px));
  width: auto;
  max-width: none;
}

.vizz-twoup figcaption {
  font-size: 11px;
  color: rgba(var(--ink-rgb), 0.6);
}

/* ── metadata panel ───────────────────────────────────────────────── */

.vizz-meta {
  background: var(--stage-bg);
  color: var(--ink);
  border-left: 1px solid rgba(var(--ink-rgb), 0.18);
  overflow-y: auto;
  min-height: 0;
}

.vizz-reader[data-meta="closed"] .vizz-meta { display: none; }

.vizz-meta-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  background: var(--stage-bg);
}

.vizz-meta-header h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.vizz-meta-close {
  cursor: pointer;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 2px 4px;
}

.vizz-meta-body { padding: 26px 28px 48px; }

.vizz-meta-kicker {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-accent-700);
  margin: 0 0 8px;
}

.vizz-meta-body h3 {
  margin: 0 0 14px;
  font-size: 30px;
  line-height: 1.14;
  text-wrap: pretty;
}

.vizz-meta-desc {
  font-size: 15px;
  line-height: 1.65;
  color: rgba(var(--ink-rgb), 0.7);
  margin: 0 0 26px;
}

.vizz-meta-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.vizz-meta-table th {
  text-align: left;
  vertical-align: top;
  padding: 0 20px 14px 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13px;
  color: rgba(var(--ink-rgb), 0.45);
  white-space: nowrap;
}
.vizz-meta-table td {
  padding: 0 0 14px;
  vertical-align: top;
  text-wrap: pretty;
}

/* ── responsive (doc 03 section 1: below 900px, single column) ────── */

@media (max-width: 900px) {
  .vizz-reader-grid,
  .vizz-reader[data-meta="closed"] .vizz-reader-grid {
    grid-template-columns: minmax(0, 1fr);
    grid-auto-rows: minmax(0, auto);
  }
  .vizz-rail { display: none; }
  .vizz-reader { height: auto; min-height: 100dvh; overflow: visible; }
  .vizz-stage-wrap { min-height: 60vh; }
}

/* ── scrollbars ───────────────────────────────────────────────────────
   vizz-tokens.css paints the thumb with a fixed dark ink (#1e211a at 22%),
   which disappears against the dark ground. Inside the reader the thumb has
   to follow --ink like everything else. */

.vizz-reader { scrollbar-color: rgba(var(--ink-rgb), 0.32) transparent; }

.vizz-rail::-webkit-scrollbar,
.vizz-meta::-webkit-scrollbar,
.vizz-twoup::-webkit-scrollbar,
#vizz-stage ::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

.vizz-rail::-webkit-scrollbar-track,
.vizz-meta::-webkit-scrollbar-track,
.vizz-twoup::-webkit-scrollbar-track,
#vizz-stage ::-webkit-scrollbar-track {
  background: transparent;
}

.vizz-rail::-webkit-scrollbar-thumb,
.vizz-meta::-webkit-scrollbar-thumb,
.vizz-twoup::-webkit-scrollbar-thumb,
#vizz-stage ::-webkit-scrollbar-thumb {
  background: rgba(var(--ink-rgb), 0.32);
  border-radius: var(--radius-pill);
}

.vizz-rail:hover::-webkit-scrollbar-thumb,
.vizz-meta:hover::-webkit-scrollbar-thumb,
.vizz-twoup:hover::-webkit-scrollbar-thumb {
  background: rgba(var(--ink-rgb), 0.48);
}

/* ── react-mosaic gutters ─────────────────────────────────────────────
   Mirador lays its window out with react-mosaic, which insets the tile by
   3px of root padding plus a 3px tile margin and paints the window body
   white. With a single chrome-less window that reads as a panel floating
   inside our stage, with a visible edge the image cannot cross when zoomed.

   Doc 03 section 5 warns off CSS overrides because Mirador's own class names
   are Emotion hashes that change between builds. These three are not: they
   come from the react-mosaic library, not the build, and are the same stable
   names the library documents. Scoped to #vizz-stage so nothing else is at
   risk. */

#vizz-stage .mosaic-root { inset: 0 !important; }
#vizz-stage .mosaic-tile { margin: 0 !important; }
#vizz-stage .mosaic-window,
#vizz-stage .mosaic-window-body {
  background: transparent !important;
  border-radius: 0 !important;
}

/* ── book filmstrip ───────────────────────────────────────────────────
   Doc 03 §1, the approved "Čitač — knjiga drugi" stage. Ours rather than
   Mirador's `scroll` view — see the note in citac.html. Overlays #vizz-stage
   so Mirador keeps a measurable size underneath. */

.vizz-strip[hidden] { display: none; }

.vizz-strip {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  /* `safe` matters once a page is zoomed past the stage: plain centring puts
     the overflow above the scroll origin, so the top of a tall page could not
     be reached by scrolling or dragging — only by zooming back out. */
  align-items: safe center;
  gap: 28px;
  padding: 18px 28px;
  /* Both axes scroll. A zoomed page is taller than the stage, and clipping
     that was what forced the reader back to 100% to see a page's head. */
  overflow: auto;
  overscroll-behavior: contain;
  touch-action: pan-x pan-y;
  /* Proximity, not mandatory: the reader centres pages itself, and a mandatory
     snap re-scrolls the strip on its own after any layout change, fighting
     that centring instead of complementing it. */
  scroll-snap-type: x proximity;
  background: var(--stage-bg);
}

/* Zoomed in, the strip is a pannable surface rather than a row of pages to
   pick from: snapping would tug the page away mid-inspection, and the cursor
   should offer the drag. Clicking still leafs. */
.vizz-strip[data-zoomed="true"] { scroll-snap-type: none; cursor: grab; }
.vizz-strip[data-zoomed="true"] .vizz-strip-page img { cursor: grab; }
.vizz-strip[data-panning="true"],
.vizz-strip[data-panning="true"] .vizz-strip-page img { cursor: grabbing; }
.vizz-strip[data-panning="true"] { user-select: none; }

.vizz-strip-page {
  margin: 0;
  flex: none;
  scroll-snap-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: .55;
  transition: opacity .2s ease;
}
.vizz-strip-page[data-current="true"] { opacity: 1; }

/* Pages are sized by height, so a spread keeps a common baseline whatever
   each page's aspect ratio is. The zoom multiplier scales that height. */
.vizz-strip-page img {
  display: block;
  flex: none;
  height: calc(var(--strip-zoom, 1) * var(--strip-page-h, 60vh));
  /* Each page carries its own ratio inline, so the box is the right width
     from first layout rather than after the image decodes. 2/3 is doc 03 §1's
     placeholder ratio, used only if a page somehow has no stored size. */
  aspect-ratio: var(--page-ar, 2 / 3);
  width: auto;
  max-width: none;
  background: #fff;
  box-shadow: 0 12px 34px rgba(35, 38, 31, .18);
  user-select: none;
  -webkit-user-drag: none;
}
.vizz-reader[data-ground="dark"] .vizz-strip-page img {
  box-shadow: 0 12px 34px rgba(0, 0, 0, .35);
}

/* A click leafs to a page, and that is the only thing a click does — so the
   focused page, which a click cannot move, offers no pointer. A zoom-in cursor
   here would promise a deep-zoom gesture the strip deliberately no longer has. */
.vizz-strip-page img { cursor: pointer; }
.vizz-strip-page[data-current="true"] img { cursor: default; }

.vizz-strip-page figcaption {
  font-size: 11px;
  color: rgba(var(--ink-rgb), 0.6);
}

/* Missing scan — doc 03 §1: label plus the pending note, bottom-left. */
.vizz-strip-missing {
  flex: none;
  height: calc(var(--strip-zoom, 1) * var(--strip-page-h, 60vh));
  aspect-ratio: 2 / 3;
  background: var(--color-neutral-300);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 2px;
  padding: 20px;
  font-size: 11px;
  color: rgba(30, 33, 26, 0.16);
}

/* The page label sits in the header for this layout, so it needs the header's
   ink rather than the stage's. */
.vizz-page-label-hdr {
  color: var(--color-text);
  min-width: 150px;
  text-align: center;
}

/* ── controls that live in the header ─────────────────────────────────
   The book layout puts paging and zoom in the page header, which stays light
   in both themes. Those controls default to --ink, which follows the *stage*
   ground — so on a dark ground they became near-white on white and vanished.
   Inside the header they take the page's own ink instead. */

.vizz-reader-header .vizz-circle,
.vizz-reader-header .vizz-zoom-label,
.vizz-reader-header .vizz-page-label {
  color: var(--color-text);
}

.vizz-reader-header .vizz-circle {
  border-color: rgba(30, 33, 26, 0.16);
}
.vizz-reader-header .vizz-circle:hover:not(:disabled) {
  background: rgba(var(--color-text-rgb), 0.06);
}