/* pdf-to-jpg.css — tool-only styles. Tokens/chrome come from /shared/shell.css.
   Every rule is scoped under #tool so nothing leaks onto the shared topbar's
   injected .controls row (playbook: a bare .controls/.actions/.card rule leaks
   and overflows mobile). This tool renders page canvases into a grid, so
   #tool{width:100%} + the thumb's overflow:hidden keep an oversized canvas from
   stretching the page at 375px. Colorblind-safe (Dan is colorblind): the
   format / resolution / pages toggles carry a ✓ glyph + heavier weight + fill
   (never hue alone); the px-size hint and clamp note are plain text; errors
   carry a ⚠ glyph + word + weight. */
#tool { width: 100%; max-width: 860px; margin: 0 auto; box-sizing: border-box; padding: var(--space-2xl) var(--space-xl) var(--space-4xl); }
#tool h1 { margin: 0 0 var(--space-sm); font-size: var(--t-2xl); font-weight: 600; }
.tool-lead { margin: 0 0 var(--space-xl); color: var(--text-secondary); font-size: var(--t-lg); max-width: 70ch; }

/* [hidden] must beat any author display: rule below (.workspace/.controls are
   block/grid, .results-actions/.seg-group are flex, .range-field is flex). */
#tool [hidden] { display: none !important; }

/* --- Dropzone ------------------------------------------------------------ */
#tool .dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-card);
  padding: var(--space-2xl);
  text-align: center;
  background: var(--surface);
}
#tool .dropzone.is-drag { border-color: var(--accent); background: var(--surface-2); }
#tool .dropzone p { margin: 0 0 var(--space-sm); }
#tool .dropzone-hint { color: var(--text-muted); font-size: var(--t-sm); margin: var(--space-sm) 0 0; }

/* --- File input (clip pattern — NEVER display:none) ---------------------- */
#tool .file-label {
  position: relative;
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-control);
  background: var(--accent);
  color: var(--accent-contrast);
  font-weight: 500;
  cursor: pointer;
}
/* Visually hidden, NOT display:none — the input stays focusable and in the
   a11y tree so keyboard users can Tab to it and press Enter/Space. */
#tool .file-label input {
  position: absolute !important;
  width: 1px !important; height: 1px !important;
  margin: -1px !important; padding: 0 !important;
  border: 0 !important; clip: rect(0 0 0 0) !important;
  clip-path: inset(50%) !important; overflow: hidden !important;
  white-space: nowrap !important;
}
#tool .file-label:focus-within { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

#tool .intake-note { margin: var(--space-lg) 0 0; font-size: var(--t-sm); color: var(--text-secondary); font-weight: 500; }

/* --- Workspace ----------------------------------------------------------- */
#tool .workspace { margin-top: var(--space-xl); }
#tool .doc-info { margin: 0 0 var(--space-lg); font-size: var(--t-lg); display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-md); align-items: baseline; }
#tool .doc-name { font-weight: 600; overflow-wrap: anywhere; min-width: 0; }
#tool .doc-pages { color: var(--text-secondary); font-size: var(--t-md); font-variant-numeric: tabular-nums; }

/* --- Controls card ------------------------------------------------------- */
/* Scoped to #tool: the shared topbar also injects a <div class="controls">, and
   an unscoped .controls here would leak this card's padding/border onto that
   unrelated element (~4px mobile overflow). */
#tool .controls {
  display: grid;
  gap: var(--space-lg);
  margin: 0 0 var(--space-lg);
  padding: var(--space-lg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
}
#tool .control-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-sm) var(--space-md); }
#tool .control-label { flex: 0 0 auto; min-width: 6.5rem; font-size: var(--t-sm); font-weight: 600; color: var(--text-secondary); }

/* --- Segmented controls (format / resolution / pages) -------------------- */
#tool .seg-group { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
#tool .seg-btn {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: inherit;
  font: inherit;
  font-size: var(--t-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-control);
  cursor: pointer;
  white-space: nowrap;
  /* Snap the shared :where(button) 120ms color transition: a mid-cross-fade
     frame can trip axe's color-contrast sampler as aria-pressed toggles
     (spurious serious flag; resting state is ≥7:1). Instant + deterministic. */
  transition: none;
}
#tool .seg-btn .seg-sub { font-variant-numeric: tabular-nums; opacity: 0.75; margin-left: 2px; }
#tool .seg-btn:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
/* Active state: glyph + weight + fill together carry state, never hue alone. */
#tool .seg-btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
  font-weight: 700;
}
#tool .seg-btn[aria-pressed="true"] .seg-sub { opacity: 0.9; }
#tool .seg-btn[aria-pressed="true"]::before { content: "\2713\00a0"; /* ✓ + nbsp */ }

/* --- Quality slider ------------------------------------------------------ */
#tool .control-block { display: flex; flex-direction: column; gap: var(--space-xs); }
#tool .control-block > label { font-weight: 600; font-size: var(--t-sm); }
#tool #quality-value { font-weight: 700; font-variant-numeric: tabular-nums; }
#tool #quality { width: 100%; max-width: 360px; accent-color: var(--accent); cursor: pointer; }
#tool #quality:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 4px; }
#tool .control-hint { margin: 0; color: var(--text-muted); font-size: var(--t-sm); max-width: 60ch; }

/* --- Resolution px hint (plain text — colorblind-safe) ------------------- */
#tool .res-hint { flex-basis: 100%; margin: 0; font-size: var(--t-sm); color: var(--text-secondary); font-variant-numeric: tabular-nums; }

/* --- Range field --------------------------------------------------------- */
#tool .range-field { display: flex; align-items: center; }
#tool .range-field input {
  width: 100%;
  max-width: 24ch;
  box-sizing: border-box;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: inherit;
  font: inherit;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-control);
}
#tool .range-field input:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
#tool .range-error { flex-basis: 100%; margin: 0; font-size: var(--t-sm); font-weight: 600; color: var(--danger); }
#tool .range-error::before { content: "\26a0\00a0"; /* ⚠ + nbsp */ }

/* --- Actions + status ---------------------------------------------------- */
#tool .results-actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; align-items: center; margin: 0 0 var(--space-md); }
#tool .results-actions button {
  border: 1px solid var(--border-strong);
  background: var(--surface); color: inherit; font: inherit;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-control); cursor: pointer;
}
#tool #download-zip { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); font-weight: 500; }
#tool #download-zip:disabled { opacity: 0.5; cursor: default; }
#tool .btn-quiet { color: var(--text-secondary); }
#tool .run-status { margin: 0 0 var(--space-md); font-size: var(--t-sm); font-weight: 500; color: var(--text-secondary); }
#tool .run-error { margin: 0 0 var(--space-md); font-size: var(--t-sm); font-weight: 600; color: var(--danger); }
#tool .run-error::before { content: "\26a0\00a0"; /* ⚠ + nbsp */ }
/* Grid cap note (many-page PDFs): plain text, colorblind-safe. */
#tool .grid-note { margin: 0 0 var(--space-md); font-size: var(--t-sm); font-weight: 500; color: var(--text-secondary); }

/* --- Rendered-page grid -------------------------------------------------- */
#tool .grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-lg);
}
#tool .page-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
  padding: var(--space-md);
  display: flex; flex-direction: column; gap: var(--space-sm);
}
/* The thumb frame clips an oversized canvas so a wide page never stretches the
   grid column (playbook: keep the drawing surface inside overflow:hidden). */
#tool .page-thumb {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: #ffffff;
  aspect-ratio: 3 / 4;
  display: flex; align-items: center; justify-content: center;
}
#tool .page-thumb canvas { display: block; max-width: 100%; max-height: 100%; height: auto; width: auto; }
#tool .page-thumb.is-pending { background: var(--surface-2); }
#tool .page-thumb .thumb-fallback {
  padding: var(--space-md); text-align: center;
  color: var(--text-muted); font-size: var(--t-sm);
}
#tool .page-meta { display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-sm); align-items: baseline; }
#tool .page-num { font-weight: 700; font-size: var(--t-sm); }
#tool .page-px { color: var(--text-muted); font-size: var(--t-xs); font-variant-numeric: tabular-nums; }
/* Clamp note: ⚠ glyph + text, colorblind-safe. */
#tool .page-clamp { flex-basis: 100%; margin: 0; font-size: var(--t-xs); color: var(--text-secondary); }
#tool .page-clamp::before { content: "\26a0\00a0"; /* ⚠ + nbsp */ }
#tool .page-download {
  align-self: flex-start;
  border: 1px solid var(--border-strong);
  background: var(--surface); color: inherit; font: inherit;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-control); cursor: pointer;
}
#tool .page-download:disabled { opacity: 0.5; cursor: default; }

/* --- Off-view render stage (on-DOM so pdfjs' rAF render advances) --------- */
/* Kept in the render tree (NOT display:none) but clipped to 1px in a viewport
   corner: a detached/hidden canvas stalls pdfjs' render promise (playbook §4). */
#tool .render-stage {
  position: fixed;
  left: 0; bottom: 0;
  width: 1px; height: 1px;
  overflow: hidden;
  opacity: 0.01;
  pointer-events: none;
  z-index: -1;
}

/* --- Deep page ----------------------------------------------------------- */
#tool .tool-copy { margin-top: var(--space-3xl); max-width: 70ch; }
#tool .tool-copy h2 { font-size: var(--t-lg); font-weight: 600; margin: var(--space-2xl) 0 var(--space-sm); }
#tool .tool-copy p { color: var(--text-secondary); line-height: 1.55; }
#tool .tool-copy code { font-size: 0.92em; overflow-wrap: anywhere; }
#tool .faq dt { font-weight: 600; margin-top: var(--space-lg); }
#tool .faq dd { margin: var(--space-xs) 0 0; color: var(--text-secondary); }

/* --- Mobile -------------------------------------------------------------- */
@media (max-width: 480px) {
  #tool { padding-inline: var(--space-lg); }
  #tool .control-label { flex-basis: 100%; }
  #tool .seg-group { width: 100%; }
  #tool .seg-btn { flex: 1 1 auto; text-align: center; }
  #tool .results-actions { flex-direction: column; align-items: stretch; }
  #tool .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}