.sentence-split-editor {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-height: 0;
}

.sentence-split-editor__input,
.sentence-split-editor__preview-column {
  min-width: 0;
  padding: 1.5rem;
}

.sentence-split-editor__input {
  border-right: 1px solid var(--line, #e2e8f0);
}

.sentence-split-editor .form-control:focus,
.sentence-split-editor .form-select:focus {
  border-color: var(--accent, #f97316);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, .15);
  outline: none;
}

.sentence-split-editor__textarea {
  min-height: 19rem;
  resize: vertical;
  border: 1.5px solid var(--line, #e2e8f0);
  border-radius: var(--radius-sm, 8px);
  font-size: .9rem;
  line-height: 1.6;
}

.sentence-split-editor__separator-row {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.sentence-split-editor__separator {
  max-width: 14rem;
  border: 1.5px solid var(--line, #e2e8f0);
  border-radius: var(--radius-sm, 8px);
}

.sentence-split-editor__custom {
  max-width: 12rem;
  border: 1.5px solid var(--line, #e2e8f0);
  border-radius: var(--radius-sm, 8px);
}

.sentence-split-editor__preview {
  min-height: 19rem;
  max-height: 26rem;
  border: 1.5px solid var(--line, #e2e8f0);
  border-radius: var(--radius-sm, 8px);
}

.sentence-split-editor__empty {
  padding: 2rem;
  color: var(--muted, #64748b);
  font-size: .875rem;
  text-align: center;
}

.sentence-split-editor__part {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .85rem;
  border-bottom: 1px solid var(--line, #e2e8f0);
}

.sentence-split-editor__part:last-child {
  border-bottom: 0;
}

.sentence-split-editor__part-number {
  flex: 0 0 auto;
  min-width: 1.6rem;
  padding: .15rem .35rem;
  background: var(--ink, #0f172a);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  text-align: center;
}

.sentence-split-editor__part-text {
  min-width: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: .84rem;
  line-height: 1.5;
}

.sentence-split-editor--fill,
.sentence-split-editor--fill .sentence-split-editor__input,
.sentence-split-editor--fill .sentence-split-editor__preview-column {
  min-height: 0;
}

.sentence-split-editor--fill .sentence-split-editor__textarea {
  height: min(24rem, 42vh);
  resize: none;
}

@media (max-width: 767.98px) {
  .sentence-split-editor {
    grid-template-columns: 1fr;
  }

  .sentence-split-editor__input {
    border-right: 0;
    border-bottom: 1px solid var(--line, #e2e8f0);
  }

  .sentence-split-editor__separator-row {
    align-items: stretch;
    flex-direction: column;
    gap: .5rem;
  }

  .sentence-split-editor__separator,
  .sentence-split-editor__custom {
    max-width: none;
  }
}