:root {
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eff6ff;
  --border: #dbe2ea;
  --border-strong: #bcc7d4;
  --ink: #1f2937;
  --muted: #667085;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --danger: #b42318;
  --danger-soft: #fff1f0;
  --success: #18794e;
  --success-soft: #edfdf3;
  --warning: #9a6700;
  --warning-soft: #fff8e1;
  --shadow: 0 1px 2px rgb(16 24 40 / 5%);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-dark);
}

button,
input,
textarea,
select {
  font: inherit;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgb(255 255 255 / 96%);
}

.site-nav,
.page-shell,
.site-footer {
  width: min(100% - 32px, 800px);
  margin-inline: auto;
}

.site-nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 750;
  letter-spacing: 0;
  text-decoration: none;
}

.brand:hover {
  color: var(--accent);
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 650;
}

.page-shell {
  padding-block: 48px 56px;
}

.hero {
  max-width: 660px;
  margin-bottom: 36px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 12px;
  font-size: clamp(2rem, 6vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 10px;
  font-size: 1.3rem;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

h3 {
  margin-bottom: 6px;
  font-size: 1.05rem;
  line-height: 1.35;
}

.lede {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tool-card {
  min-height: 180px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tool-card:hover {
  border-color: var(--border-strong);
  box-shadow: 0 8px 24px rgb(16 24 40 / 7%);
}

.tool-card p {
  margin-bottom: 18px;
  color: var(--muted);
}

.tool-card a {
  font-weight: 700;
}

.tool-header {
  margin-bottom: 28px;
}

.tool-header h1 {
  font-size: clamp(1.8rem, 5vw, 2.65rem);
}

.panel {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel + .panel {
  margin-top: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field + .field,
.field + .actions,
.actions + .field,
.panel + .panel,
.stats-grid + .panel {
  margin-top: 18px;
}

label {
  font-weight: 700;
}

textarea,
input[type="text"] {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  outline: none;
}

textarea {
  min-height: 220px;
  padding: 14px;
  resize: vertical;
}

input[type="text"] {
  padding: 10px 12px;
}

textarea:focus,
input[type="text"]:focus,
button:focus-visible,
select:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 15%);
  outline: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button {
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

button.secondary {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--ink);
}

button.secondary:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-dark);
}

button.active,
button[aria-pressed="true"] {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  color: #ffffff;
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.button-grid button {
  width: 100%;
}

.options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  margin-bottom: 18px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
}

.check-row input {
  width: 17px;
  height: 17px;
  accent-color: var(--accent);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.stat {
  min-height: 92px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.stat-label {
  display: block;
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.stat-value {
  display: block;
  font-size: 1.35rem;
  font-variant-numeric: tabular-nums;
  font-weight: 750;
  line-height: 1.25;
}

.status {
  min-height: 24px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.hidden {
  display: none !important;
}

.diff-input-grid,
.diff-output-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.diff-pane {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.diff-pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-soft);
  font-size: 0.9rem;
  font-weight: 750;
}

.diff-count {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
}

.diff-rows {
  overflow-x: auto;
}

.diff-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  min-height: 34px;
  border-bottom: 1px solid #edf0f3;
}

.diff-row:last-child {
  border-bottom: 0;
}

.diff-line-number {
  padding: 6px 8px;
  border-right: 1px solid #edf0f3;
  color: var(--muted);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  user-select: none;
}

.diff-line {
  margin: 0;
  padding: 6px 10px;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.84rem;
  line-height: 1.55;
}

.diff-line.is-added {
  background: var(--success-soft);
}

.diff-line.is-deleted {
  background: var(--danger-soft);
}

.diff-line.is-modified {
  background: var(--warning-soft);
}

.diff-empty {
  padding: 20px;
  color: var(--muted);
  text-align: center;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.86rem;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend i {
  width: 10px;
  height: 10px;
  border: 1px solid rgb(0 0 0 / 8%);
  border-radius: 2px;
}

.legend .added {
  background: var(--success-soft);
}

.legend .deleted {
  background: var(--danger-soft);
}

.legend .modified {
  background: var(--warning-soft);
}

.site-footer {
  padding-block: 28px 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-note {
  max-width: 700px;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.footer-links a {
  font-weight: 650;
}

#ad-slot:empty {
  display: none;
}

.prose {
  max-width: 720px;
}

.prose h2 {
  margin-top: 30px;
}

.prose p,
.prose li {
  color: #344054;
}

.prose ul {
  padding-left: 22px;
}

@media (max-width: 680px) {
  .page-shell {
    padding-block: 34px 42px;
  }

  .tool-grid,
  .stats-grid,
  .diff-input-grid,
  .diff-output-grid {
    grid-template-columns: 1fr;
  }

  .button-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .options {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 18px;
  }
}

@media (max-width: 420px) {
  .button-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Component refinements for the cleaner and diff tools. */
.options {
  padding: 0;
  border: 0;
}

.diff-table {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.diff-table-inner {
  min-width: 640px;
}

.diff-table-head {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid var(--border);
  background: var(--surface-soft);
  font-size: 0.9rem;
  font-weight: 750;
}

.diff-table-head div {
  padding: 10px 12px;
}

.diff-table-head div + div {
  border-left: 1px solid var(--border);
}

.diff-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.diff-pair + .diff-pair {
  border-top: 1px solid #edf0f3;
}

.diff-pair .diff-row {
  border-bottom: 0;
}

.diff-pair .diff-row + .diff-row {
  border-left: 1px solid #edf0f3;
}