.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  min-width: 28px;
  padding: 0 6px;
  border-radius: 6px;
  color: currentColor;
  opacity: .55;
  transition: opacity .12s ease, background-color .12s ease;
}
.icon-btn:hover { opacity: 1; background-color: rgba(0,0,0,.06); }
.dark .icon-btn:hover { background-color: rgba(255,255,255,.08); }
.icon-btn.active { opacity: 1; color: #b45309; }

.popover {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  z-index: 40;
  background: var(--pop-bg, #fff);
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,.12);
  padding: 10px;
  width: 168px;
}
.dark .popover { --pop-bg: #1c1a17; border-color: rgba(255,255,255,.08); box-shadow: 0 8px 24px rgba(0,0,0,.4); }

.pop-btn {
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(0,0,0,.06);
  transition: background-color .12s ease;
}
.dark .pop-btn { background: rgba(255,255,255,.08); }
.pop-btn:hover { background: rgba(0,0,0,.12); }
.dark .pop-btn:hover { background: rgba(255,255,255,.14); }

.pop-chip {
  font-size: 10px;
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(0,0,0,.05);
  opacity: .6;
}
.pop-chip.active { opacity: 1; background: rgba(180,83,9,.15); color: #b45309; }
.dark .pop-chip { background: rgba(255,255,255,.06); }

#source { caret-color: #b45309; }
#source::placeholder { color: rgba(0,0,0,.25); }
.dark #source::placeholder { color: rgba(255,255,255,.25); }

#preview-pane.hidden-pane { display: none; }

#btn-exit-focus { display: none; }

.page {
  background: white;
  min-height: 100%;
  max-width: 760px;
  padding: 3.2rem 3.6rem;
  box-shadow: 0 0 0 1px rgba(0,0,0,.04);
}
.dark .page { background: #14120f; box-shadow: 0 0 0 1px rgba(255,255,255,.06); }

/* focus mode */
body.focus-mode #topbar,
body.focus-mode #preview-pane,
body.focus-mode #dragbar,
body.focus-mode .wordbar { display: none !important; }
body.focus-mode #editor-pane { width: 100% !important; }
body.focus-mode #source {
  max-width: 700px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.9;
  padding-top: 12vh;
}
body.focus-mode #btn-exit-focus { display: inline-flex !important; }

@media print {
  #topbar, #editor-pane, #dragbar, .wordbar, #btn-exit-focus { display: none !important; }
  #preview-pane { overflow: visible !important; }
  .page { box-shadow: none; max-width: none; padding: 0; }
  body { background: white !important; }
}