:root {
  --app-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "Noto Sans Mono CJK TC", monospace;
  --app-positive: light-dark(#1a7f37, #3fb950);
  --app-negative: light-dark(#cf222e, #f85149);
  --diff-delete-bg: light-dark(#ffebe9, rgba(248, 81, 73, 0.12));
  --diff-delete-number-bg: light-dark(#ffd7d5, rgba(248, 81, 73, 0.22));
  --diff-delete-mark-bg: light-dark(#ff818266, rgba(248, 81, 73, 0.4));
  --diff-insert-bg: light-dark(#e6ffec, rgba(46, 160, 67, 0.12));
  --diff-insert-number-bg: light-dark(#ccffd8, rgba(46, 160, 67, 0.22));
  --diff-insert-mark-bg: light-dark(#abf2bc, rgba(46, 160, 67, 0.4));
  --diff-muted-bg: light-dark(#f6f8fa, rgba(110, 118, 129, 0.1));
}

.app {
  padding-block: 1.5rem 2rem;
}

/* Tocas removes the default outline from controls; restore a keyboard focus ring. */
:is(.ts-button, .ts-checkbox input, summary):focus-visible {
  outline: 2px solid var(--ts-primary-500);
  outline-offset: 2px;
}

.panel textarea:focus-visible {
  outline: 2px solid var(--ts-primary-500);
  outline-offset: 4px;
  border-radius: var(--ts-border-radius-element);
}

.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.app-header h1 {
  margin: 0;
}

.editors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.panel-header h2 {
  margin: 0;
  font-size: 1rem;
}

.panel textarea {
  min-height: 14rem;
  font-family: var(--app-mono);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem 1rem;
}

.stat {
  min-width: 0;
}

.stat-value {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem;
}

.stat-number {
  font-size: 1.25rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.stat-delta {
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}

.stat-delta.is-positive {
  color: var(--app-positive);
}

.stat-delta.is-negative {
  color: var(--app-negative);
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--ts-gray-500);
}

.stats-details {
  margin-top: 0.75rem;
}

.stats-details summary {
  font-size: 0.875rem;
  color: var(--ts-gray-600);
}

.stats-details .stats-grid {
  margin-top: 0.5rem;
}

.options {
  margin-top: 1rem;
}

.options-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.options-actions {
  margin-inline-start: auto;
}

.diff-box {
  margin-top: 1rem;
}

.diff-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.diff-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-inline-start: auto;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.diff-summary .is-added {
  color: var(--app-positive);
  font-weight: 500;
}

.diff-summary .is-removed {
  color: var(--app-negative);
  font-weight: 500;
}

.diff-summary .is-warning {
  color: var(--ts-gray-600);
}

.diff-output {
  overflow: hidden;
}

.diff-empty {
  padding: 2rem 1rem;
}

.diff-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-family: var(--app-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

.diff-table col.is-number {
  width: 3.75rem;
}

.diff-table col.is-marker {
  width: 1.75rem;
}

.diff-table td {
  padding: 0 0.5rem;
  vertical-align: top;
}

.diff-number {
  text-align: end;
  color: var(--ts-gray-500);
  user-select: none;
}

.diff-number.is-right {
  border-inline-start: 1px solid var(--ts-gray-300);
}

.diff-marker {
  text-align: center;
  color: var(--ts-gray-600);
  user-select: none;
}

.diff-text {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.diff-table td.is-delete {
  background: var(--diff-delete-bg);
}

.diff-table td.diff-number.is-delete {
  background: var(--diff-delete-number-bg);
}

.diff-table td.is-insert {
  background: var(--diff-insert-bg);
}

.diff-table td.diff-number.is-insert {
  background: var(--diff-insert-number-bg);
}

.diff-table td.is-empty {
  background: var(--diff-muted-bg);
}

.diff-table mark {
  color: inherit;
  border-radius: 2px;
}

.diff-table td.is-delete mark {
  background: var(--diff-delete-mark-bg);
}

.diff-table td.is-insert mark {
  background: var(--diff-insert-mark-bg);
}

.diff-skip {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--ts-gray-500);
  background: var(--diff-muted-bg);
}

.app-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--ts-gray-500);
}

.app-footer p {
  margin: 0.25rem 0;
}

@media screen and (max-width: 766px) {
  .editors {
    grid-template-columns: minmax(0, 1fr);
  }

  .options-actions {
    margin-inline-start: 0;
  }

  .diff-summary {
    margin-inline-start: 0;
  }

  .diff-table {
    font-size: 0.8125rem;
  }

  .diff-table col.is-number {
    width: 2.75rem;
  }

  .diff-table td {
    padding: 0 0.25rem;
  }
}