/* MarkupCraft review UI — toolbar | sheets · sheet · panels | status bar.
 * Tokens only (paper/model aware); hierarchy by line weight; no shadows, no gradients. rem sizes, px for pens. */

.mc {
  --mc-nav-h: 2.2rem;
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr) 20rem;
  grid-template-rows: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "tools tools tools"
    "left stage right"
    "status status status";
  height: 100%;
  min-height: 0;
}

/* ---- Toolbar ---- */
.mc-tools {
  grid-area: tools;
  display: flex;
  flex-wrap: wrap;
  background: var(--sheet-2);
  border-bottom: var(--pen-2) solid var(--ink);
}
.mc-tool-group { display: flex; flex-direction: column; padding: .2rem .3rem .25rem; border-right: var(--pen-1) solid var(--line); flex: 0 0 auto; }
.mc-tool-group:last-of-type { border-right: 0; }
.mc-tool-label { font-size: .6875rem; font-weight: 600; color: var(--ink-2); padding: 0 .2rem .1rem; }
.mc-tool-row { display: flex; gap: .05rem; }
.mc-tool {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .1rem;
  min-width: 2.55rem;
  padding: .2rem .15rem .15rem;
  font: inherit;
  font-size: .6875rem;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: var(--pen-1) solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
}
.mc-tool .bi { font-size: 1.1rem; line-height: 1; color: var(--layer); }
.mc-tool:hover { border-color: var(--line); background: var(--sheet); }
.mc-tool:focus-visible { outline: var(--pen-3) solid var(--action); outline-offset: 1px; }
.mc-tool[aria-pressed="true"] { border-color: var(--layer); background: var(--sheet); }
.mc-tool:disabled { opacity: .4; cursor: default; }
.mc-tool:disabled:hover { border-color: transparent; background: transparent; }
.mc-tool.is-dirty .bi { color: var(--action); }
.mc-tool.is-dirty span::after { content: ""; display: inline-block; width: .35rem; height: .35rem; margin-left: .2rem; vertical-align: .15em; border-radius: 50%; background: var(--action); }
/* the Edit group's More menu (cut, paste in place, duplicate, …), each with its keys */
.mc-menu { position: relative; }
.mc-menu > summary { list-style: none; }
.mc-menu > summary::-webkit-details-marker { display: none; }
.mc-menu[open] > summary { border-color: var(--ink); background: var(--sheet); }
.mc-menu-list {
  position: absolute; z-index: 30; top: calc(100% + .25rem); right: 0; min-width: 15rem;
  display: flex; flex-direction: column; padding: .25rem 0;
  background: var(--sheet-2); border: var(--pen-2) solid var(--ink); border-radius: var(--radius);
}
.mc-menu-list button { display: flex; justify-content: space-between; gap: 1.25rem; font: inherit; font-size: .875rem; font-weight: 500; text-align: left; color: var(--ink); background: none; border: 0; padding: .35rem .8rem; cursor: pointer; }
.mc-menu-list button:hover:not(:disabled), .mc-menu-list button:focus-visible { background: var(--sheet); text-decoration: underline; outline: none; }
.mc-menu-list button:disabled { color: var(--ink-2); opacity: .55; cursor: default; }
.mc-menu-list button kbd { font: inherit; font-size: .75rem; color: var(--ink-2); background: none; border: 0; padding: 0; }
.mc-menu-list hr { margin: .25rem 0; border: 0; border-top: var(--pen-1) solid var(--line); opacity: 1; }

/* Settings › MarkupCraft (settings.inc; the dialog sits outside <main>) */
.mc-set-input {
  width: 100%; min-width: 0; font: inherit; color: var(--ink); background: var(--sheet);
  border: var(--pen-1) solid var(--line); border-radius: var(--radius); padding: .35rem .55rem;
}
.mc-set-input::placeholder { color: var(--placeholder); }
.mc-set-input:focus { outline: var(--pen-2) solid var(--action); outline-offset: 0; border-color: var(--action); }
.mc-set-color { width: 3.5rem; height: 2rem; padding: .1rem; border: var(--pen-1) solid var(--line); border-radius: var(--radius); background: var(--sheet); cursor: pointer; }
.shell-seg.mc-set-seg2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 480px) { .shell-seg.mc-set-seg2 { grid-template-columns: minmax(0, 1fr); } }

/* the staff tab sits bottom-left: lift it clear of the status bar */
body.app-shell .sp-tab { bottom: 2.5rem; }

/* ---- Panels ---- */
.mc-panel { overflow-y: auto; min-height: 0; background: var(--sheet-2); scrollbar-width: thin; }
.mc-left { grid-area: left; border-right: var(--pen-2) solid var(--ink); }
.mc-right { grid-area: right; border-left: var(--pen-2) solid var(--ink); display: flex; flex-direction: column; overflow: hidden; }
.mc-sec { padding: .75rem .8rem; }
.mc-sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: .5rem; margin-bottom: .5rem; }
.mc-h { font-size: var(--fs-sm); font-weight: 700; font-stretch: 112%; margin: 0 0 .5rem; }
.mc-sec-head .mc-h { margin: 0; }
.mc-note, .mc-muted { color: var(--ink-2); font-size: .8125rem; margin: .5rem 0 0; }
.mc-count { font-variant-numeric: tabular-nums; }
.mc-linkbtn { font: inherit; font-size: .8125rem; font-weight: 600; color: var(--action); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 2px; white-space: nowrap; }
.mc-linkbtn:hover { text-decoration-thickness: 2px; }
.mc-danger { color: var(--layer-red); }

.mc-input, .mc-select {
  width: 100%;
  min-width: 0;
  font: inherit;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--ink);
  background: var(--sheet);
  border: var(--pen-1) solid var(--line);
  border-radius: var(--radius);
  padding: .2rem .4rem;
  font-variant-numeric: tabular-nums;
}
.mc-input::placeholder { color: var(--placeholder); }
.mc-select { padding-right: 1.2rem; }
.mc-input:focus, .mc-select:focus { outline: var(--pen-2) solid var(--action); outline-offset: 0; border-color: var(--action); }
textarea.mc-input { resize: vertical; min-height: 3.5rem; line-height: 1.35; }
.mc-num { max-width: 5.5rem; }
.mc-color { width: 2.4rem; height: 1.55rem; padding: 0 .1rem; border: var(--pen-1) solid var(--line); border-radius: var(--radius); background: var(--sheet); cursor: pointer; }
.mc-color:disabled { opacity: .4; cursor: default; }
.mc input[type="range"] { width: 100%; accent-color: var(--action); }
.mc input[type="checkbox"] { accent-color: var(--action); width: 1rem; height: 1rem; }
.mc-row { display: flex; align-items: center; gap: .5rem; }
.mc-stack { display: grid; gap: .3rem; }

/* sheets list */
.mc-sheets-sec .mc-input { margin-bottom: .5rem; }
.mc-sheets { list-style: none; margin: 0; padding: 0; display: grid; gap: .3rem; }
.mc-sheet {
  display: grid;
  grid-template-columns: 4.25rem minmax(0, 1fr);
  gap: .55rem;
  align-items: start;
  width: 100%;
  padding: .3rem;
  font: inherit;
  text-align: left;
  color: var(--ink);
  background: transparent;
  border: var(--pen-1) solid transparent;
  border-left-width: var(--pen-3);
  border-radius: var(--radius);
  cursor: pointer;
}
.mc-sheet:hover { border-color: var(--line); background: var(--sheet); }
.mc-sheet[aria-current="true"] { border-color: var(--ink); border-left-color: var(--layer); background: var(--sheet); }
.mc-sheet:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: 1px; }
.mc-thumb-box { display: block; width: 4.25rem; height: 3.2rem; overflow: hidden; background: var(--sheet); border: var(--pen-1) solid var(--grid); }
.mc-thumb { display: block; width: 100%; height: 100%; object-fit: contain; opacity: 0; }
.mc-thumb.is-ready { opacity: 1; }
.mc-sheet-text { display: grid; gap: .05rem; min-width: 0; font-size: .8125rem; }
.mc-sheet-title { font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mc-sheet-meta { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mc-sheet-count { color: var(--layer); font-weight: 600; font-size: .75rem; }

/* ---- Stage ---- */
.mc-stage { grid-area: stage; position: relative; min-width: 0; min-height: 0; overflow: hidden; background: var(--sheet); }
.mc-canvases { position: absolute; inset: 0 0 var(--mc-nav-h) 0; overflow: hidden; }
.mc-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.mc-over { touch-action: none; outline: none; }
.mc-over:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: -2px; }
.mc-over.is-draw { cursor: crosshair; }
.mc-over.is-pan { cursor: grab; }
.mc-over.is-panning { cursor: grabbing; }
.mc-edit {
  position: absolute;
  z-index: 4;
  margin: 0;
  resize: none;
  overflow: hidden;
  background: color-mix(in srgb, var(--sheet-2) 92%, transparent);
  border: var(--pen-2) solid var(--action);
  border-radius: 0;
  outline: none;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}
.mc-edit.is-note { font: inherit; font-size: .875rem; line-height: 1.35; color: var(--ink); padding: .4rem .5rem; overflow: auto; border-radius: var(--radius); background: var(--sheet-2); }
.mc-hint {
  position: absolute;
  z-index: 2;
  top: 1rem;
  left: 1rem;
  max-width: min(34rem, calc(100% - 2rem));
  padding: .8rem 1rem;
  font-size: .875rem;
  background: var(--sheet-2);
  border: var(--pen-2) solid var(--ink);
  border-radius: var(--radius);
}
.mc-hint-h { margin: 0 0 .35rem; font-weight: 700; font-stretch: 112%; }
.mc-hint ul { margin: 0 0 .75rem; padding-left: 1.1rem; }
.mc-hint li + li { margin-top: .2rem; }
.mc kbd { font-family: inherit; font-size: .75rem; font-weight: 700; padding: 0 .3rem; color: var(--ink); background: var(--sheet); border: var(--pen-1) solid var(--line); border-radius: var(--radius); }
.mc-drop, .mc-busy {
  position: absolute;
  inset: .75rem;
  z-index: 5;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: color-mix(in srgb, var(--sheet) 85%, transparent);
  border: var(--pen-3) dashed var(--action);
  border-radius: var(--radius);
}
.mc-busy { border-style: solid; border-color: var(--line); }
.mc-busy span { padding: .5rem .9rem; background: var(--sheet-2); border: var(--pen-1) solid var(--line); }
.mc-drop .bi { color: var(--action); }
.mc-legend {
  position: absolute;
  z-index: 2;
  top: .6rem;
  right: .6rem;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .9rem;
  padding: .35rem .6rem;
  font-size: .8125rem;
  font-weight: 600;
  background: var(--sheet-2);
  border: var(--pen-1) solid var(--ink);
  border-radius: var(--radius);
}
.mc-legend span { display: inline-flex; align-items: center; gap: .35rem; }
.mc-swatch { display: inline-block; width: .85rem; height: .85rem; border-radius: var(--radius); }
.mc-sw-old { background: var(--layer-red); }
.mc-sw-new { background: var(--layer-blue); }
.mc-sw-same { background: color-mix(in srgb, var(--ink) 45%, var(--sheet)); }

/* sheet + zoom bar under the sheet */
.mc-nav {
  position: absolute;
  z-index: 2;
  left: 0; right: 0; bottom: 0;
  height: var(--mc-nav-h);
  display: flex;
  align-items: center;
  gap: .25rem;
  padding: 0 .5rem;
  background: var(--sheet-2);
  border-top: var(--pen-1) solid var(--line);
  font-size: .8125rem;
}
.mc-navbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.8rem;
  height: 1.6rem;
  padding: 0 .35rem;
  font: inherit;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: var(--pen-1) solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
}
.mc-navbtn:hover { border-color: var(--line); background: var(--sheet); }
.mc-navbtn:disabled { opacity: .4; cursor: default; }
.mc-navbtn:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: 0; }
.mc-navtext { font-size: .8125rem; }
.mc-navlabel { min-width: 0; flex: 1 1 auto; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding: 0 .25rem; }
.mc-navsep { width: var(--pen-1); align-self: stretch; margin: .45rem .25rem; background: var(--line); }
.mc-zoom { width: 4.2rem; text-align: center; font: inherit; font-weight: 600; font-variant-numeric: tabular-nums; color: var(--ink); background: var(--sheet); border: var(--pen-1) solid var(--line); border-radius: var(--radius); padding: .1rem .25rem; }
.mc-zoom:focus { outline: var(--pen-2) solid var(--action); border-color: var(--action); }

/* ---- Right panel: tabs ---- */
.mc-tabs { display: flex; flex: 0 0 auto; overflow-x: auto; scrollbar-width: none; border-bottom: var(--pen-1) solid var(--line); background: var(--sheet-2); }
.mc-tab {
  flex: 1 0 auto;
  font: inherit;
  font-size: .75rem;
  font-weight: 600;
  color: var(--ink-2);
  background: transparent;
  border: 0;
  border-bottom: var(--pen-3) solid transparent;
  padding: .5rem .45rem .4rem;
  white-space: nowrap;
  cursor: pointer;
}
.mc-tab:hover { color: var(--ink); }
.mc-tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--layer); }
.mc-tab:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: -2px; }
.mc-pane { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: .75rem .8rem 1rem; scrollbar-width: thin; }
.mc-pane[hidden] { display: none; }

.mc-props { display: grid; grid-template-columns: fit-content(42%) minmax(0, 1fr); gap: .4rem .6rem; align-items: center; font-size: .8125rem; margin: 0; }
.mc-k { color: var(--ink-2); font-weight: 500; font-size: .8125rem; }
.mc-props .span { grid-column: 1 / -1; }
.mc-props .v { font-variant-numeric: tabular-nums; font-weight: 700; }
.mc-props-sub { grid-column: 1 / -1; margin: .5rem 0 0; padding-top: .55rem; border-top: var(--pen-1) solid var(--grid); font-size: .75rem; font-weight: 700; color: var(--ink-2); }
.mc-props + .mc-props { margin-top: .4rem; }
.mc-dl { display: grid; grid-template-columns: fit-content(45%) minmax(0, 1fr); gap: .25rem .75rem; margin: 0 0 .75rem; font-size: .8125rem; }
.mc-dl dt { color: var(--ink-2); font-weight: 500; }
.mc-dl dd { margin: 0; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.mc-actions { display: flex; flex-wrap: wrap; gap: .4rem; margin: .75rem 0 0; }
.mc-form { display: grid; grid-template-columns: fit-content(40%) minmax(0, 1fr); gap: .4rem .6rem; align-items: center; font-size: .8125rem; }
.mc-form label { color: var(--ink-2); font-weight: 500; }
.mc-filters { display: grid; grid-template-columns: fit-content(30%) minmax(0, 1fr); gap: .3rem .5rem; align-items: center; font-size: .8125rem; }
.mc-filters label { color: var(--ink-2); font-weight: 500; }
.mc-listcount { margin: .6rem 0 .3rem; font-variant-numeric: tabular-nums; }

/* markups, punch items, tools */
.mc-list, .mc-chest { list-style: none; margin: 0; padding: 0; }
.mc-list > li { border-top: var(--pen-1) solid var(--grid); }
.mc-list > li:first-child { border-top: 0; }
.mc-item {
  display: grid;
  grid-template-columns: 1.4rem minmax(0, 1fr) auto;
  gap: .45rem;
  align-items: start;
  width: 100%;
  padding: .4rem .25rem;
  font: inherit;
  font-size: .8125rem;
  text-align: left;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-left: var(--pen-3) solid transparent;
  cursor: pointer;
}
.mc-item:hover { background: var(--sheet); }
.mc-item[aria-current="true"], .mc-item[aria-pressed="true"] { background: var(--sheet); border-left-color: var(--action); }
.mc-item:focus-visible { outline: var(--pen-2) solid var(--action); outline-offset: -2px; }
.mc-item-icon { font-size: 1rem; line-height: 1.2; }
.mc-item-main { display: grid; gap: .1rem; min-width: 0; }
.mc-item-title { font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mc-item-text { overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow-wrap: anywhere; }
.mc-item-meta { color: var(--ink-2); font-size: .75rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mc-chip { align-self: start; font-size: .6875rem; font-weight: 700; padding: .05rem .35rem; border: var(--pen-1) solid var(--line); border-radius: var(--radius); color: var(--ink-2); white-space: nowrap; }
.mc-st-accepted, .mc-st-completed { color: var(--layer-green); border-color: var(--layer-green); }
.mc-st-rejected { color: var(--layer-red); border-color: var(--layer-red); }
.mc-punch .mc-item { grid-template-columns: 1.6rem minmax(0, 1fr) auto; }
.mc-punch-n { display: grid; place-items: center; width: 1.4rem; height: 1.4rem; border-radius: 50%; font-size: .75rem; font-weight: 700; color: var(--sheet-2); background: var(--ink); font-variant-numeric: tabular-nums; }
.mc-punch-edit { padding: 0 .25rem .6rem 2.3rem; }
.mc-chest { display: grid; gap: .15rem; margin-top: .75rem; }
.mc-chest-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; border-top: var(--pen-1) solid var(--grid); }
.mc-chest-row:first-child { border-top: 0; }
.mc-tool-item { grid-template-columns: 1.4rem minmax(0, 1fr); }
.mc-x { font: inherit; background: none; border: var(--pen-1) solid transparent; border-radius: var(--radius); color: var(--ink-2); cursor: pointer; padding: .15rem .35rem; }
.mc-x:hover { border-color: var(--line); color: var(--ink); }
.mc-cmp-tools { margin-top: 1rem; padding-top: .75rem; border-top: var(--pen-1) solid var(--grid); display: grid; gap: .35rem; }
.mc-cmp-tools .mc-k { margin-top: .35rem; }
.mc-cmp-tools .mc-muted { margin: 0; }
.mc-nudge { display: flex; align-items: center; gap: .2rem; }
.mc-nudge .mc-navbtn { border-color: var(--line); }
.mc-step { width: auto; margin-left: .4rem; }

/* comment threads */
.mc-thread-sec { margin-top: .4rem; }
.mc-thread { list-style: none; margin: .4rem 0 .5rem; padding: 0; display: grid; gap: .35rem; font-size: .8125rem; }
.mc-thread li { display: grid; gap: .1rem; padding: .3rem .5rem; border-left: var(--pen-2) solid var(--line); background: var(--sheet); }
.mc-thread li.is-status { border-left-color: var(--layer); }
.mc-thread li.is-status .mc-thread-text { font-weight: 600; }
.mc-thread-meta { color: var(--ink-2); font-size: .75rem; }
.mc-thread-text { white-space: pre-wrap; overflow-wrap: anywhere; }
.mc-thread-sec textarea.mc-input { min-height: 2.6rem; }
.mc-links { display: inline-flex; gap: .75rem; }
.mc-item-side { display: grid; justify-items: end; gap: .2rem; }
.mc-replies { font-size: .6875rem; font-weight: 700; color: var(--ink-2); white-space: nowrap; }

/* ---- Status bar ---- */
.mc-status { grid-area: status; display: flex; align-items: center; gap: .9rem; min-width: 0; padding: .2rem 1rem; font-size: .8125rem; background: var(--sheet-2); border-top: var(--pen-1) solid var(--line); }
.mc-coords { font-variant-numeric: tabular-nums; font-weight: 600; min-width: 12rem; white-space: nowrap; }
.mc-status-msg { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; flex: 1 1 auto; }
.mc-statbtn { font: inherit; font-size: .8125rem; font-weight: 600; color: var(--ink); background: transparent; border: var(--pen-1) solid var(--line); border-radius: var(--radius); padding: .05rem .5rem; cursor: pointer; white-space: nowrap; max-width: 16rem; overflow: hidden; text-overflow: ellipsis; }
.mc-statbtn:hover { border-color: var(--ink); }
.mc-statbtn .bi { color: var(--layer); }

/* ---- Dialogs ---- */
.mc-dialog {
  width: min(28rem, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  padding: 0;
  color: var(--ink);
  background: var(--sheet-2);
  border: var(--pen-2) solid var(--ink);
  border-radius: var(--radius);
}
.mc-dialog.is-wide { width: min(40rem, calc(100vw - 2rem)); }
.mc-dialog::backdrop { background: color-mix(in srgb, var(--ink) 35%, transparent); }
.mc-dlg-head, .mc-dlg-foot { display: flex; align-items: center; gap: .6rem; padding: .65rem 1rem; }
.mc-dlg-head { border-bottom: var(--pen-1) solid var(--line); }
.mc-dlg-head .mc-h { margin: 0; }
.mc-dlg-foot { justify-content: flex-end; flex-wrap: wrap; border-top: var(--pen-1) solid var(--line); }
.mc-dlg-body { display: grid; gap: .6rem; padding: .9rem 1rem; font-size: .875rem; }
.mc-dlg-text { margin: 0; white-space: pre-line; }
.mc-dlg-err { margin: 0; color: var(--layer-red); font-weight: 600; font-size: .8125rem; }
.mc-dlg-err:empty { display: none; }
.mc-dlg-body .mc-props { font-size: .875rem; }

/* keep the toolbar on one row down to about 1280 px wide */
@media (max-width: 1340px) {
  .mc-tool-group { padding-left: .2rem; padding-right: .2rem; }
  .mc-tool { min-width: 2.3rem; }
  .mc-tool span { font-size: .625rem; }
}
@media (max-width: 1180px) {
  .mc { grid-template-columns: 11.5rem minmax(0, 1fr) 18rem; }
  .mc-sheet { grid-template-columns: minmax(0, 1fr); }
  .mc-thumb-box { width: 100%; height: 4.5rem; }
}
@media (max-width: 760px) {
  body.app-shell .sp-tab { bottom: .75rem; }
  .mc-tools { flex-wrap: nowrap; overflow-x: auto; }
  .mc-menu-list { position: fixed; top: auto; left: 1rem; right: 1rem; min-width: 0; }
  .mc {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto 62vh auto auto auto;
    grid-template-areas: "tools" "stage" "status" "right" "left";
    height: auto;
  }
  .mc-left, .mc-right { border: 0; border-top: var(--pen-2) solid var(--ink); }
  .mc-right { overflow: visible; }
  .mc-status { flex-wrap: wrap; gap: .5rem; }
  .mc-coords { min-width: 0; }
  .mc-hint { font-size: .8125rem; }
}
@media (prefers-reduced-motion: no-preference) {
  .mc-thumb { transition: opacity .15s; }
}