:root {
  --token-color-bg: #ffffff;
  --token-color-panel: #f6f8fa;
  --token-color-border: #d0d7de;
  --token-color-text: #1f2328;
  --token-color-muted: #656d76;
  --token-color-accent: #0969da;
  --token-color-removed-bg: #ffebe9;
  --token-color-removed-hl: #ffb8b2;
  --token-color-removed-fg: #82071e;
  --token-color-added-bg: #e6ffec;
  --token-color-added-hl: #9ce5ae;
  --token-color-added-fg: #0a5326;
  --token-font-family-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo,
    Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--token-color-bg);
  color: var(--token-color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  font-size: 14px;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.app-header h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 4px 0 24px;
  color: var(--token-color-muted);
}

/* Input */

.editor {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 720px) {
  .editor {
    grid-template-columns: 1fr;
  }
}

.input {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-title {
  font-weight: 600;
}

textarea {
  width: 100%;
  min-height: 340px;
  padding: 12px;
  border: 1px solid var(--token-color-border);
  border-radius: 6px;
  background: var(--token-color-bg);
  color: inherit;
  font-family: var(--token-font-family-mono);
  font-size: 13px;
  line-height: 1.5;
  resize: vertical;
  tab-size: 4;
}

textarea:focus {
  outline: 2px solid var(--token-color-accent);
  outline-offset: -1px;
  border-color: var(--token-color-accent);
}

/* Toolbar */

.toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 20px 0 12px;
}

.toolbar--centred {
  justify-content: center;
}

button {
  font: inherit;
  padding: 6px 14px;
  border: 1px solid var(--token-color-border);
  border-radius: 6px;
  background: var(--token-color-panel);
  color: inherit;
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: #eaeef2;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.primary {
  padding: 8px 28px;
  border-color: transparent;
  background: var(--token-color-accent);
  color: #fff;
  font-weight: 600;
}

button.primary:hover:not(:disabled) {
  background: #0860ca;
}

.stats {
  margin: 0;
  display: flex;
  gap: 12px;
  color: var(--token-color-muted);
}

.stat--removed {
  color: var(--token-color-removed-fg);
}

.stat--added {
  color: var(--token-color-added-fg);
}

.modes {
  margin-left: auto;
  display: flex;
}

.mode {
  border-radius: 0;
}

.mode:first-child {
  border-radius: 6px 0 0 6px;
}

.mode:last-child {
  border-radius: 0 6px 6px 0;
  border-left-width: 0;
}

.mode--active {
  background: var(--token-color-accent);
  border-color: var(--token-color-accent);
  color: #fff;
}

.mode--active:hover:not(:disabled) {
  background: #0860ca;
}

/* Diff */

.diff {
  display: grid;
  border: 1px solid var(--token-color-border);
  border-radius: 6px;
  overflow: hidden;
  font-family: var(--token-font-family-mono);
  font-size: 13px;
}

.diff--split {
  grid-template-columns: max-content minmax(0, 1fr) max-content minmax(0, 1fr);
}

.diff--unified {
  grid-template-columns: max-content max-content max-content minmax(0, 1fr);
}

.gutter,
.marker,
.code {
  min-height: 21px;
  line-height: 21px;
  padding: 0 10px;
}

.gutter,
.marker {
  text-align: right;
  color: var(--token-color-muted);
  user-select: none;
  background: var(--token-color-panel);
}

.marker {
  padding: 0 6px;
  text-align: center;
}

.code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  tab-size: 4;
}

/* Divider between the two panes of the side-by-side view. */
.diff--split > *:nth-child(4n + 3) {
  border-left: 1px solid var(--token-color-border);
}

.is-removed.code {
  background: var(--token-color-removed-bg);
}

.is-removed.gutter,
.is-removed.marker {
  background: #ffdcd8;
  color: var(--token-color-removed-fg);
}

.is-added.code {
  background: var(--token-color-added-bg);
}

.is-added.gutter,
.is-added.marker {
  background: #ccffd8;
  color: var(--token-color-added-fg);
}

.code--filler,
.gutter--filler {
  background: #f7f7f7;
}

.highlight {
  border-radius: 2px;
}

.is-removed .highlight {
  background: var(--token-color-removed-hl);
}

.is-added .highlight {
  background: var(--token-color-added-hl);
}