/* region ── Split popup ─────────────────────────────────────────────────────── */
.split-popup {
  position: fixed;
  z-index: 3000;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 320px;
  font-family: var(--font-mono);
}

.split-popup-label {
  font-size: 0.6rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Text row — words with draggable divider */
.split-text-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 1px;
  padding: 6px 8px;
  background: var(--surface2);
  border-radius: 4px;
  border: 1px solid var(--border);
  min-height: 2rem;
  cursor: default;
  user-select: none;
}

.split-word {
  font-size: 0.78rem;
  padding: 1px 3px;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.1s;
  line-height: 1.6;
}
.split-word.left  { color: var(--text); }
.split-word.left:hover  { background: rgba(255,255,255,0.08); }
.split-word.right { color: var(--muted); }
.split-word.right:hover { background: rgba(255,255,255,0.06); }

.split-divider {
  display: inline-flex;
  align-items: center;
  padding: 0 3px;
  color: var(--accent);
  font-size: 1.1rem;
  cursor: ew-resize;
  user-select: none;
  opacity: 0.9;
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.1s;
}
.split-divider:hover { opacity: 1; transform: scaleY(1.15); }

/* Waveform strip */
.split-wave-wrap {
  position: relative;
  height: 52px;
  border-radius: 4px;
  overflow: hidden;
  background: #0d0d12;
  border: 1px solid var(--border);
  cursor: ew-resize;
}
.split-wave-wrap canvas {
  display: block;
  width: 100%; height: 100%;
  pointer-events: none;
}
.split-wave-cursor {
  position: absolute;
  top: 0; bottom: 0;
  width: 2px;
  margin-left: -1px;
  background: var(--accent);
  pointer-events: none;
  border-radius: 1px;
}
.split-wave-cursor::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(232,255,71,0.6);
}
.split-time-label {
  position: absolute;
  bottom: 3px;
  font-size: 0.55rem;
  color: var(--accent);
  font-family: var(--font-mono);
  pointer-events: none;
  text-shadow: 0 1px 3px rgba(0,0,0,0.8);
  transform: translateX(-50%);
}

/* Action row */
.split-actions {
  display: flex;
  gap: 6px;
  justify-content: flex-end;
}
.split-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.75rem;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
}
.split-btn-confirm {
  background: rgba(232,255,71,0.1);
  border-color: rgba(232,255,71,0.4);
  color: var(--accent);
}
.split-btn-confirm:hover {
  background: rgba(232,255,71,0.18);
  border-color: rgba(232,255,71,0.7);
}
.split-btn-cancel {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}
.split-btn-cancel:hover { background: var(--surface2); color: var(--text); }