/* ============================================
   Pixia - Compare PDF studio (compare.html)
   Complements css/ai-tool.css (.at-* primitives).
   Scope: body.at-compare      Accent: blue
   Views: side-by-side / overlay wipe / pixel diff
   ============================================ */

body.at-compare [hidden] { display: none !important; }

body.at-compare {
  --cp-accent: #3b82f6;
  --cp-accent-2: #60a5fa;
  --cp-accent-ink: #ffffff;
  --cp-diff: #ef4444;        /* changed / removed from A */
  --cp-added: #10b981;       /* added in B              */
  --cp-same: #64748b;        /* identical               */
  --cp-changed: #f59e0b;     /* changed pages           */
  --cp-removed: #ef4444;
  --cp-line: var(--glass-border);
  --cp-line-strong: var(--glass-border-hover);
  --cp-soft: var(--bg-secondary);
  --cp-paper: #ffffff;
  --cp-w: 760px;             /* render width, set by JS */
}

/* ============================================================
   Shared bits
   ============================================================ */
.cp-hidden { display: none !important; }

.cp-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.cp-tool { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 22px; align-items: start; }

body.at-compare .at-btn svg { width: 18px; height: 18px; }

/* small square icon buttons used across toolbars */
.cp-mini {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border-radius: 10px;
  border: 1px solid var(--cp-line);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: color .18s var(--at-ease), border-color .18s var(--at-ease), background .18s var(--at-ease);
}
.cp-mini:hover:not([disabled]) {
  color: var(--text-primary);
  border-color: var(--cp-line-strong);
  background: var(--bg-card-hover);
}
.cp-mini[disabled] { opacity: .45; cursor: not-allowed; }
.cp-mini svg { width: 16px; height: 16px; }
.cp-mini.solid {
  background: var(--cp-accent);
  border-color: var(--cp-accent);
  color: var(--cp-accent-ink);
}
.cp-mini.solid:hover:not([disabled]) { background: var(--cp-accent-2); border-color: var(--cp-accent-2); }

/* ============================================================
   1. Input panel
   ============================================================ */
#cpInput .cp-intro { margin: 0 0 18px; font-size: 13px; line-height: 1.65; color: var(--text-tertiary); max-width: 62ch; }

.cp-slots {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 14px;
  align-items: stretch;
}

.cp-slot {
  position: relative;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 18px;
  border-radius: var(--at-radius-lg);
  border: 1.5px dashed var(--cp-line-strong);
  background: var(--glass-bg);
  cursor: pointer;
  text-align: center;
  transition: border-color .2s var(--at-ease), background .2s var(--at-ease), transform .2s var(--at-ease);
}
.cp-slot:hover,
.cp-slot.drag { border-color: var(--cp-accent); background: color-mix(in srgb, var(--cp-accent) 9%, var(--glass-bg)); }
.cp-slot.drag { transform: scale(1.006); }
.cp-slot:focus-within { border-color: var(--cp-accent); }
.cp-slot input[type="file"] { position: absolute; inset: 0; opacity: 0; pointer-events: none; }
.cp-slot.has-file { border-style: solid; border-color: color-mix(in srgb, var(--slot-accent, var(--cp-accent)) 55%, var(--cp-line)); cursor: default; }
.cp-slot[data-slot="a"] { --slot-accent: #f59e0b; }
.cp-slot[data-slot="b"] { --slot-accent: #3b82f6; }

.cp-slot-tag {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 11px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--slot-accent, var(--cp-accent));
  background: color-mix(in srgb, var(--slot-accent, var(--cp-accent)) 14%, transparent);
}
.cp-slot-tag i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

.cp-slot-icon {
  justify-self: center;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  color: var(--slot-accent, var(--cp-accent));
  background: color-mix(in srgb, var(--slot-accent, var(--cp-accent)) 14%, transparent);
}
.cp-slot-icon svg { width: 26px; height: 26px; }

.cp-slot-title { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--text-primary); }
.cp-slot-sub { font-size: 12.5px; line-height: 1.55; color: var(--text-tertiary); }

/* loaded file card sits inside the slot */
.cp-slot .cp-file { display: none; }
.cp-slot.has-file .cp-file { display: grid; }
.cp-slot.has-file .cp-slot-empty { display: none; }

.cp-file {
  gap: 10px;
  text-align: start;
}
.cp-file-row { display: flex; align-items: center; gap: 11px; min-width: 0; }
.cp-file-thumb {
  width: 44px; height: 44px;
  flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 11px;
  border: 1px solid var(--cp-line);
  background: var(--cp-paper);
  overflow: hidden;
}
.cp-file-thumb canvas,
.cp-file-thumb img { display: block; width: 100%; height: 100%; object-fit: contain; }
.cp-file-info { min-width: 0; display: grid; gap: 2px; }
.cp-file-name { font-size: 13.5px; font-weight: 600; color: var(--text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cp-file-meta { font-size: 11.5px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }
.cp-file-status { font-size: 11.5px; font-weight: 600; }
.cp-file-status.is-ready { color: var(--cp-added); }
.cp-file-status.is-busy { color: var(--cp-changed); }
.cp-file-status.is-error { color: var(--cp-diff); }
.cp-file-actions { display: flex; gap: 8px; }

.cp-swap {
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--cp-line);
  background: var(--glass-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: color .18s var(--at-ease), border-color .18s var(--at-ease), transform .18s var(--at-ease);
}
.cp-swap:hover { color: var(--cp-accent); border-color: var(--cp-accent); transform: rotate(180deg); }
.cp-swap svg { width: 18px; height: 18px; }

/* settings block */
.cp-settings { margin-block-start: 20px; display: grid; gap: 16px; }
.cp-field { display: grid; gap: 9px; }
.cp-field-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.cp-field-head label { font-size: 12.5px; font-weight: 600; letter-spacing: .02em; color: var(--text-secondary); }
.cp-field-head output { font-size: 12.5px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }
.cp-field-hint { margin: 0; font-size: 11.5px; line-height: 1.55; color: var(--text-muted); }

.cp-switches { display: grid; gap: 10px; }

body.at-compare .at-switch { align-items: flex-start; }
.cp-switch-text { display: grid; gap: 2px; }
.cp-switch-text b { font-size: 13.5px; font-weight: 600; color: var(--text-primary); }
.cp-switch-text span { font-size: 11.5px; color: var(--text-muted); line-height: 1.5; }

/* progress row (shared with .at-progress) */
.cp-progress-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-block-start: 8px; }
.cp-progress-row .at-progress-msg { flex: 1 1 auto; min-width: 0; margin: 0; }
body.at-compare .at-progress-fill { background: linear-gradient(90deg, var(--cp-accent), var(--cp-accent-2)); }

/* run actions inside the input panel */
#cpInput .at-actions { grid-template-columns: minmax(0, 1fr) auto; }
#cpInput .at-actions .at-progress { grid-column: 1 / -1; }
@media (max-width: 560px) { #cpInput .at-actions { grid-template-columns: 1fr; } }

/* ============================================================
   2. Workspace shell
   ============================================================ */
.cp-workspace {
  position: sticky;
  inset-block-start: 84px;
  align-self: start;
  min-width: 0;
  display: grid;
  gap: 14px;
}

.cp-side { min-width: 0; display: grid; gap: 16px; }

@media (max-width: 1080px) {
  .cp-tool { grid-template-columns: 1fr; }
  .cp-workspace { position: static; }
}

.cp-panel { min-height: 0; }
.cp-panel h2 { display: flex; align-items: center; gap: 9px; }
.cp-panel h2 svg { width: 17px; height: 17px; color: var(--cp-accent); }

/* ============================================================
   3. Top toolbar
   ============================================================ */
.cp-topbar {
  position: relative;
  z-index: 30;
  display: grid;
  gap: 10px;
  padding: 12px;
  border-radius: var(--at-radius-lg);
  border: 1px solid var(--cp-line);
  background: color-mix(in srgb, var(--bg-primary) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--at-shadow);
}
.cp-topbar-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.cp-topbar-row + .cp-topbar-row { padding-block-start: 10px; border-block-start: 1px solid var(--cp-line); }

.cp-chips { display: flex; align-items: center; gap: 8px; min-width: 0; flex: 1 1 260px; }
.cp-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  max-width: 100%;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--cp-line);
  background: var(--glass-bg);
  font-size: 12.5px;
}
.cp-chip b { flex: 0 0 auto; font-weight: 700; letter-spacing: .03em; font-size: 11px; text-transform: uppercase; }
.cp-chip[data-side="a"] b { color: #f59e0b; }
.cp-chip[data-side="b"] b { color: var(--cp-accent); }
.cp-chip span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-secondary); }
.cp-chip-to { color: var(--text-muted); flex: 0 0 auto; }

.cp-seg {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--cp-line);
  background: var(--glass-bg);
}
.cp-seg button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .18s var(--at-ease);
}
.cp-seg button svg { width: 15px; height: 15px; }
.cp-seg button:hover { color: var(--text-primary); }
.cp-seg button.active { background: var(--cp-accent); color: var(--cp-accent-ink); }

.cp-zoom { display: inline-flex; align-items: center; gap: 4px; padding: 3px; border-radius: 999px; border: 1px solid var(--cp-line); background: var(--glass-bg); }
.cp-zoom .cp-mini { border: 0; background: transparent; min-width: 30px; height: 30px; padding: 0 6px; border-radius: 999px; }
.cp-zoom-val { min-width: 46px; text-align: center; font-size: 12.5px; font-weight: 600; color: var(--text-secondary); font-variant-numeric: tabular-nums; }

.cp-nav { display: inline-flex; align-items: center; gap: 8px; margin-inline-start: auto; }
.cp-nav-count { font-size: 12.5px; font-weight: 600; color: var(--text-secondary); font-variant-numeric: tabular-nums; min-width: 62px; text-align: center; }

.cp-filter { display: inline-flex; align-items: center; gap: 8px; }
.cp-filter > span { font-size: 12px; color: var(--text-muted); }

/* ============================================================
   4. Page rows
   ============================================================ */
.cp-pages {
  min-width: 0;
  display: grid;
  gap: 18px;
  align-items: start;
  align-content: start;
}

.cp-page {
  border-radius: var(--at-radius-lg);
  border: 1px solid var(--cp-line);
  background: var(--bg-card);
  overflow: hidden;
  scroll-margin-block-start: 16px;
  box-shadow: var(--at-shadow);
}
.cp-page.is-target { animation: cp-flash 1.4s var(--at-ease); }
@keyframes cp-flash {
  0%, 100% { box-shadow: none; }
  30% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--cp-accent) 55%, transparent); }
}

.cp-page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-block-end: 1px solid var(--cp-line);
  background: color-mix(in srgb, var(--bg-secondary) 45%, transparent);
}
.cp-page-no { font-family: var(--font-display); font-size: 14px; font-weight: 700; color: var(--text-primary); }
.cp-page-tools { margin-inline-start: auto; display: flex; align-items: center; gap: 8px; }
.cp-page-words { font-size: 12px; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }
.cp-page-words .add { color: var(--cp-added); font-weight: 600; }
.cp-page-words .del { color: var(--cp-diff); font-weight: 600; }

/* status badges */
.cp-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
}
.cp-badge i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.cp-badge.s-identical { color: var(--cp-same); background: color-mix(in srgb, var(--cp-same) 16%, transparent); }
.cp-badge.s-changed { color: #b45309; background: color-mix(in srgb, var(--cp-changed) 20%, transparent); }
.cp-badge.s-added { color: #047857; background: color-mix(in srgb, var(--cp-added) 18%, transparent); }
.cp-badge.s-removed { color: #b91c1c; background: color-mix(in srgb, var(--cp-removed) 16%, transparent); }

/* marker toggle */
.cp-mark-toggle { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-tertiary); cursor: pointer; user-select: none; }
.cp-mark-toggle input { accent-color: var(--cp-accent); width: 15px; height: 15px; }

/* page body + panes */
.cp-page-body { padding: 14px; }
.cp-page-body[data-mode="side"] .cp-fig-diff,
.cp-page-body[data-mode="side"] .cp-fig-overlay,
.cp-page-body[data-mode="diff"] .cp-fig-side,
.cp-page-body[data-mode="diff"] .cp-fig-overlay,
.cp-page-body[data-mode="overlay"] .cp-fig-side,
.cp-page-body[data-mode="overlay"] .cp-fig-diff { display: none; }

.cp-fig-side { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cp-fig-overlay, .cp-fig-diff { display: block; overflow-x: auto; }

.cp-figure { min-width: 0; margin: 0; }
.cp-figure-label {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-block-end: 7px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--text-tertiary);
  text-transform: uppercase;
}
.cp-figure-label span { color: var(--text-muted); font-weight: 500; text-transform: none; letter-spacing: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cp-figure[data-side="a"] .cp-figure-label b { color: #f59e0b; }
.cp-figure[data-side="b"] .cp-figure-label b { color: var(--cp-accent); }

.cp-pane {
  position: relative;
  border-radius: var(--at-radius-md);
  border: 1px solid var(--cp-line);
  background:
    repeating-conic-gradient(rgba(128, 128, 128, .14) 0% 25%, transparent 0% 50%) 50% / 18px 18px,
    var(--bg-tertiary);
  overflow: auto;
  min-height: 160px;
}
.cp-pane-inner { position: relative; display: block; width: max-content; min-width: 100%; margin-inline: auto; }
.cp-canvas-img { display: block; margin-inline: auto; background: var(--cp-paper); }
.cp-pane canvas { display: block; }
.cp-pane.is-missing canvas { display: none; }

.cp-pane-empty {
  display: grid;
  place-items: center;
  gap: 8px;
  min-height: 220px;
  padding: 26px 18px;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
}
.cp-pane-empty svg { width: 34px; height: 34px; color: var(--text-muted); }

/* loading shimmer */
.cp-pane.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 20%, color-mix(in srgb, var(--cp-accent) 12%, transparent) 45%, transparent 70%);
  background-size: 220% 100%;
  animation: cp-shimmer 1.1s linear infinite;
}
@keyframes cp-shimmer { from { background-position: 140% 0; } to { background-position: -140% 0; } }

/* region overlays */
.cp-regions { position: absolute; inset: 0; pointer-events: none; }
.cp-region {
  position: absolute;
  border: 2px solid var(--cp-diff);
  border-radius: 5px;
  background: color-mix(in srgb, var(--cp-diff) 16%, transparent);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .35) inset;
  transition: opacity .2s var(--at-ease);
}
.cp-region.added { border-color: var(--cp-added); background: color-mix(in srgb, var(--cp-added) 16%, transparent); }
.cp-region b {
  position: absolute;
  inset-block-start: -11px;
  inset-inline-start: -11px;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--cp-diff);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.cp-region.added b { background: var(--cp-added); }
.cp-pane.no-markers .cp-regions { display: none; }

/* overlay wipe */
.cp-overlay-wrap {
  position: relative;
  width: min(100%, var(--cp-w));
  margin-inline: auto;
  border-radius: var(--at-radius-md);
  border: 1px solid var(--cp-line);
  overflow: hidden;
  background: var(--cp-paper);
  touch-action: none;
  user-select: none;
}
.cp-overlay-wrap canvas { display: block; width: 100%; height: auto; }
.cp-overlay-wrap .cp-ov-b { position: absolute; inset-block-start: 0; inset-inline-start: 0; clip-path: inset(0 calc(100% - var(--cp-split, 50%)) 0 0); }
.cp-overlay-wrap .cp-ov-regions { position: absolute; inset: 0; pointer-events: none; }
.cp-ov-handle {
  position: absolute;
  inset-block: 0;
  inset-inline-start: var(--cp-split, 50%);
  width: 3px;
  margin-inline-start: -1.5px;
  background: var(--cp-accent);
  cursor: ew-resize;
  pointer-events: auto;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .5);
}
.cp-ov-handle::after {
  content: "";
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  width: 38px;
  height: 38px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--cp-accent);
  box-shadow: 0 6px 18px -6px rgba(0, 0, 0, .6);
}
.cp-ov-handle::before {
  content: "‹ ›";
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -2px;
  pointer-events: none;
}
.cp-ov-tag {
  position: absolute;
  inset-block-start: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  pointer-events: none;
  backdrop-filter: blur(4px);
}
.cp-ov-tag.t-a { inset-inline-start: 10px; background: rgba(245, 158, 11, .88); }
.cp-ov-tag.t-b { inset-inline-end: 10px; background: color-mix(in srgb, var(--cp-accent) 88%, transparent); }

/* diff composite */
.cp-diff-wrap { position: relative; width: min(100%, var(--cp-w)); margin-inline: auto; border-radius: var(--at-radius-md); border: 1px solid var(--cp-line); background: var(--cp-paper); overflow: hidden; }
.cp-diff-wrap canvas { display: block; width: 100%; height: auto; }

/* per-page text change list */
.cp-text-changes { margin-block-start: 12px; border-block-start: 1px dashed var(--cp-line); padding-block-start: 10px; display: grid; gap: 6px; }
.cp-text-changes > summary {
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  list-style: none;
}
.cp-text-changes > summary::-webkit-details-marker { display: none; }
.cp-text-changes > summary::before { content: "▸ "; color: var(--cp-accent); }
.cp-text-changes[open] > summary::before { content: "▾ "; }
.cp-change-line { font-size: 12.5px; line-height: 1.6; color: var(--text-secondary); }
.cp-change-line.del { border-inline-start: 3px solid var(--cp-diff); padding-inline-start: 9px; }
.cp-change-line.add { border-inline-start: 3px solid var(--cp-added); padding-inline-start: 9px; }

/* ============================================================
   5. Sidebar
   ============================================================ */
.cp-score { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 16px; }
.cp-ring { position: relative; width: 92px; height: 92px; flex: 0 0 auto; }
.cp-ring svg { transform: rotate(-90deg); }
.cp-ring circle { fill: none; stroke-width: 8; }
.cp-ring .track { stroke: var(--bg-tertiary); }
.cp-ring .bar { stroke: var(--cp-accent); stroke-linecap: round; transition: stroke-dashoffset .6s var(--at-ease), stroke .3s var(--at-ease); }
.cp-ring b { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; color: var(--text-primary); }
.cp-score-info { display: grid; gap: 4px; }
.cp-score-info .cp-score-label { font-size: 12px; color: var(--text-tertiary); }
.cp-score-info .cp-score-note { font-size: 12.5px; line-height: 1.5; color: var(--text-secondary); }

.cp-rows { display: grid; gap: 2px; margin-block-start: 14px; }
.cp-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 2px; font-size: 13px; }
.cp-row + .cp-row { border-block-start: 1px solid var(--cp-line); }
.cp-row dt, .cp-row .cp-row-k { display: flex; align-items: center; gap: 8px; color: var(--text-secondary); }
.cp-row .cp-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--cp-same); flex: 0 0 auto; }
.cp-row .cp-dot.s-changed { background: var(--cp-changed); }
.cp-row .cp-dot.s-added { background: var(--cp-added); }
.cp-row .cp-dot.s-removed { background: var(--cp-removed); }
.cp-row .cp-row-v { font-weight: 700; color: var(--text-primary); font-variant-numeric: tabular-nums; }

.cp-empty-note { margin: 0; font-size: 12.5px; line-height: 1.6; color: var(--text-muted); }

/* page navigator */
.cp-navgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(66px, 1fr)); gap: 9px; max-height: 420px; overflow-y: auto; padding: 2px; }
.cp-navcard {
  position: relative;
  padding: 5px 4px 6px;
  border-radius: 10px;
  border: 1.5px solid var(--cp-line);
  background: var(--glass-bg);
  cursor: pointer;
  text-align: center;
  transition: border-color .16s var(--at-ease), transform .16s var(--at-ease);
}
.cp-navcard:hover { transform: translateY(-2px); border-color: var(--cp-line-strong); }
.cp-navcard.is-active { border-color: var(--cp-accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--cp-accent) 30%, transparent); }
.cp-navcard .cp-nav-thumb {
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  overflow: hidden;
  background:
    repeating-conic-gradient(rgba(128, 128, 128, .16) 0% 25%, transparent 0% 50%) 50% / 12px 12px,
    var(--bg-tertiary);
}
.cp-nav-thumb img { max-width: 100%; max-height: 100%; display: block; }
.cp-nav-thumb .cp-nav-ph { font-size: 15px; font-weight: 700; color: var(--text-muted); }
.cp-navcard .cp-nav-num { display: block; margin-block-start: 4px; font-size: 10.5px; font-weight: 600; color: var(--text-tertiary); font-variant-numeric: tabular-nums; }
.cp-navcard .cp-nav-badge {
  position: absolute;
  inset-block-start: 3px;
  inset-inline-end: 3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cp-changed);
  box-shadow: 0 0 0 2px var(--bg-card);
}
.cp-navcard.s-identical .cp-nav-badge { background: var(--cp-same); }
.cp-navcard.s-added .cp-nav-badge { background: var(--cp-added); }
.cp-navcard.s-removed .cp-nav-badge { background: var(--cp-removed); }

/* export */
.cp-export { display: grid; gap: 9px; margin-block-start: 14px; }
.cp-export-hint { margin: 0; font-size: 11.5px; line-height: 1.55; color: var(--text-muted); }

/* legend */
.cp-legend { display: grid; gap: 8px; margin-block-start: 12px; }
.cp-legend-row { display: flex; align-items: center; gap: 9px; font-size: 12.5px; color: var(--text-secondary); }
.cp-legend-swatch { width: 16px; height: 16px; border-radius: 5px; flex: 0 0 auto; border: 1px solid var(--cp-line); }
.cp-legend-swatch.sw-removed { background: color-mix(in srgb, var(--cp-removed) 45%, transparent); border-color: var(--cp-removed); }
.cp-legend-swatch.sw-added { background: color-mix(in srgb, var(--cp-added) 45%, transparent); border-color: var(--cp-added); }
.cp-legend-swatch.sw-same { background: color-mix(in srgb, var(--cp-same) 35%, transparent); border-color: var(--cp-same); }
.cp-legend-swatch.sw-changed { background: color-mix(in srgb, var(--cp-changed) 45%, transparent); border-color: var(--cp-changed); }

.cp-keys { margin: 0; font-size: 11.5px; line-height: 1.6; color: var(--text-muted); }

/* ============================================================
   6. Empty / no-diff states
   ============================================================ */
.cp-state {
  display: grid;
  place-items: center;
  gap: 10px;
  padding: 48px 22px;
  text-align: center;
  border-radius: var(--at-radius-lg);
  border: 1px dashed var(--cp-line-strong);
  background: var(--glass-bg);
  color: var(--text-tertiary);
}
.cp-state svg { width: 44px; height: 44px; color: var(--text-muted); }
.cp-state b { font-family: var(--font-display); font-size: 1.05rem; color: var(--text-primary); }
.cp-state p { margin: 0; font-size: 13px; max-width: 46ch; line-height: 1.6; }

/* ============================================================
   7. Responsive
   ============================================================ */
/* input panel lives in the narrow right column when the tool is two-column */
@media (min-width: 1081px) {
  .cp-side .cp-slots { grid-template-columns: 1fr; }
  .cp-side .cp-swap { justify-self: center; transform: rotate(90deg); }
  .cp-side .cp-swap:hover { transform: rotate(270deg); }
}

@media (max-width: 820px) {
  .cp-slots { grid-template-columns: 1fr; }
  .cp-swap { justify-self: center; transform: rotate(90deg); }
  .cp-swap:hover { transform: rotate(270deg); }
  .cp-fig-side { grid-template-columns: 1fr; }
  .cp-topbar { position: static; }
  .cp-nav { margin-inline-start: 0; }
}

@media (max-width: 560px) {
  .cp-page-body { padding: 10px; }
  .cp-fig-side { gap: 10px; }
  .cp-seg button span { display: none; }
  .cp-seg button { padding: 8px 10px; }
  .cp-score { grid-template-columns: 1fr; justify-items: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .cp-page.is-target { animation: none; }
  .cp-pane.is-loading::after { animation: none; }
  .cp-swap:hover { transform: none; }
}

/* keep the diff canvas crisp when zoomed out */
.cp-diff-wrap canvas,
.cp-overlay-wrap canvas,
.cp-canvas-img { image-rendering: auto; }