/* content/slides.css - Slides sub-tab: auto-hide sidebar + full-window editor.

   WHY position:fixed (Codex-native, no shell hacks, no JS sizing): the editor's
   parts (#chrome/#nav/#stagewrap) are position:absolute and give .cdx-deck-editor
   no intrinsic height, and the sub-tab is mounted three wrappers deep
   (.bs-main > .cdx-view > #cdx-subview, all height:auto). So the shell claims its
   own viewport region with position:fixed below the Codex chrome (topbar 65 +
   sub-tab row 31 = 96px), the way the Lessons tab owns a viewport-relative
   height. It depends on NOTHING upstream and on NO JavaScript, so it cannot
   cache-desync or collapse. Torn down with the sub-tab on unmount (the view is
   cleared), so the fixed layer never leaks to other tabs.

   Sidebar model: with no deck open the sidebar is pinned (.is-open). Open a deck
   (.deck-open on the shell) and the sidebar slides off-canvas; reaching the left
   edge re-adds .is-open (JS), leaving it removes .is-open (mouseleave). The
   editor region always fills the whole shell underneath. */

:root { --cdx-chrome-h: 96px; --cdx-slides-side-w: 320px; }

.cdx-slides-shell {
  position: fixed;
  left: 0; right: 0;
  top: var(--cdx-chrome-h);
  bottom: 0;
  z-index: 5;
  transition: top 0.2s ease;
  /* The shell backdrop uses the shared Codex page token (light: soft teal-steel,
     dark: deep slate), NOT the editor's internal --bg (which is only defined on
     .cdx-deck-editor and would fall back to near-black here). */
  background: var(--background);
  overflow: hidden;
}

/* Editor region: always the full shell. */
.cdx-slides-region { position: absolute; inset: 0; display: flex; flex-direction: column; }
.cdx-slides-stage { flex: 1 1 auto; min-height: 0; }
.cdx-slides-stage.cdx-deck-editor { border: 0; border-radius: 0; }

/* Placeholder shown when no deck is open (the sidebar is pinned beside it). */
.cdx-slides-placeholder {
  margin: auto;
  padding: 2rem;
  max-width: 28rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Left hot-strip: a thin always-present zone + chevron hint while a deck is open
   (the mousemove handler is the real trigger; this is just an affordance). */
.cdx-slides-edge { position: absolute; left: 0; top: 0; bottom: 0; width: 16px; z-index: 110; }
.cdx-slides-shell.deck-open .cdx-slides-edge::after {
  content: "\203A";
  position: absolute; left: 2px; top: 50%; transform: translateY(-50%);
  color: var(--text-secondary); opacity: 0.5; font-size: 1.4rem; line-height: 1;
}

/* Sidebar: overlays the editor region, slides in/out from the left. */
.cdx-slides-sidebar {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: var(--cdx-slides-side-w);
  /* Above the editor's internal chrome (its menus/popovers reach z-index 80) so
     the sidebar visibly slides OVER the editor instead of vanishing behind it. */
  z-index: 120;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
  box-shadow: 4px 0 18px -8px var(--shadow, rgba(0,0,0,0.3));
  transform: translateX(-100%);
  transition: transform 0.18s ease;
}
.cdx-slides-sidebar.is-open { transform: translateX(0); }

.cdx-slides-side-head {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}
.cdx-slides-side-title { margin: 0; margin-right: auto; font-size: 1.05rem; color: var(--text-primary); }

.cdx-slides-side-list { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 0.5rem; display: flex; flex-direction: column; gap: 0.25rem; }

.cdx-slides-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
}
.cdx-slides-row:hover { background: var(--cdx-card-hover-bg, rgba(127,127,127,0.08)); }
.cdx-slides-row.is-active { background: var(--cdx-card-sel-bg, rgba(20,184,166,0.12)); border-color: var(--cdx-card-sel-border, rgba(20,184,166,0.4)); }
.cdx-slides-row-info { flex: 1; min-width: 0; }
.cdx-slides-row-title { color: var(--text-primary); font-weight: 600; font-size: 0.92rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cdx-slides-row-sub { color: var(--text-secondary); font-size: 0.76rem; margin-top: 0.1rem; }
.cdx-slides-row-menu {
  flex: 0 0 auto;
  border: 0; background: none; cursor: pointer;
  color: var(--text-secondary); font-size: 1rem; line-height: 1;
  padding: 0 0.2rem; border-radius: 6px; opacity: 0;
}
.cdx-slides-row:hover .cdx-slides-row-menu { opacity: 0.7; }
.cdx-slides-row-menu:hover { opacity: 1; color: var(--accent, #14b8a6); }

/* ── Focus mode ───────────────────────────────────────────────────────────────
   An open deck recedes the Codex topbar + sub-tab row (both inside .bs-topbar)
   to reclaim vertical space; the shell fills from the very top. Cursor to the
   top edge slides the chrome back over the editor (the Lessons focus pattern).
   Scoped to body.cdx-slides-focus, which slides.js only sets while a deck is
   open and clears on unmount, so other tabs are untouched. */
body.cdx-slides-focus .cdx-slides-shell { top: 0; }
body.cdx-slides-focus .bs-topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 9900;
  transform: translateY(-100%); opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
body.cdx-slides-focus.cdx-slides-focus--top .bs-topbar { transform: translateY(0); opacity: 1; }