:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-subtle: #f6f8fa;
  --surface-strong: #f6f8fa;
  --text: #24292f;
  --muted: #57606a;
  --border: #d0d7de;
  --border-strong: #afb8c1;
  --accent: #0969da;
  --accent-soft: rgba(9, 105, 218, 0.12);
  --success: #1a7f37;
  --success-soft: rgba(26, 127, 55, 0.12);
  --danger: #cf222e;
  --danger-soft: rgba(207, 34, 46, 0.12);
  --shadow: 0 1px 0 rgba(27, 31, 36, 0.04);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --container: 1120px;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0d1117;
    --surface: #161b22;
    --surface-subtle: #0d1117;
    --surface-strong: #161b22;
    --text: #e6edf3;
    --muted: #8b949e;
    --border: #30363d;
    --border-strong: #484f58;
    --accent: #2f81f7;
    --accent-soft: rgba(47, 129, 247, 0.16);
    --success: #3fb950;
    --success-soft: rgba(63, 185, 80, 0.16);
    --danger: #f85149;
    --danger-soft: rgba(248, 81, 73, 0.16);
    --shadow: none;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: linear-gradient(180deg, var(--surface-subtle) 0, var(--bg) 220px);
  color: var(--text);
  line-height: 1.6;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

button {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 2px;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner,
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand:hover {
  text-decoration: none;
}

.brand__mark {
  width: 2rem;
  height: 2rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, var(--surface-strong), var(--bg));
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
}

.nav-toggle {
  display: none;
  padding: 0.65rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 500;
  padding: 0.35rem 0.25rem;
}

.site-nav a[aria-current="page"] {
  color: var(--text);
}

main {
  flex: 1;
}

.hero {
  padding: 4rem 0 2.5rem;
}

.hero__panel,
.section-card,
.tool-card,
.content-card,
.faq-list details,
.related-card,
.table-scroll,
.status-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero__panel {
  padding: 2rem;
}

.hero__panel > * + * {
  margin-top: 1rem;
}

.hero__eyebrow,
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-subtle);
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.hero h1,
.page-hero h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero p,
.page-hero p,
.section-intro,
.lede {
  color: var(--muted);
  max-width: 65ch;
}

.input,
.textarea,
.select {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: 12px;
  padding: 0.95rem 1rem;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.input:focus,
.textarea:focus,
.select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  outline: none;
}

.input[aria-invalid="true"],
.textarea[aria-invalid="true"],
.select[aria-invalid="true"] {
  border-color: color-mix(in srgb, var(--danger) 30%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--danger-soft) 80%, transparent);
}

.hero-widget {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-subtle);
}

.hero-widget__label {
  margin: 0;
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-widget__main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.hero-widget__copy {
  min-width: 92px;
  flex-shrink: 0;
}

.hero-widget__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1;
  letter-spacing: -0.04em;
  word-break: break-word;
}

.hero-widget .compact-info-row {
  grid-template-columns: minmax(112px, 128px) minmax(0, 1fr);
}

.hero-widget .compact-info-row dd {
  font-size: 0.9rem;
  white-space: nowrap;
  overflow-x: auto;
}

.hero-widget__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

.stack {
  display: grid;
  gap: 1rem;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  padding: 1.5rem 0 2.5rem;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2vw, 2rem);
  letter-spacing: -0.03em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.tool-card,
.related-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem;
  transition: transform 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.tool-card:hover,
.tool-card:focus-within,
.related-card:hover,
.related-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  text-decoration: none;
}

.tool-card[hidden] {
  display: none;
}

.related-card--static:hover,
.related-card--static:focus-within {
  transform: none;
  border-color: var(--border);
}

.tool-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.tool-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.tool-card h3,
.related-card h3 {
  margin: 0;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.tool-card p,
.related-card p,
.section-card p,
.content-card p,
.faq-list p,
.status-card p {
  margin: 0;
  color: var(--muted);
}

.card-link,
.button,
.button-secondary,
.button-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}

.card-link,
.button {
  background: var(--accent);
  color: #ffffff;
}

.card-link:hover,
.button:hover {
  text-decoration: none;
  filter: brightness(0.96);
}

.card-link:disabled,
.button:disabled,
.button-secondary:disabled,
.button-ghost:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  filter: none;
  transform: none;
}

.button-small {
  min-height: 2.3rem;
  padding: 0.55rem 0.85rem;
  font-size: 0.95rem;
}

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

.button-secondary:hover,
.button-ghost:hover {
  background: var(--surface-subtle);
  text-decoration: none;
}

.button-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.button-row-spaced {
  margin-top: 1rem;
}

.page-hero {
  padding: 2.5rem 0 1.25rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.breadcrumbs a {
  color: var(--muted);
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.8fr);
  gap: 1.25rem;
  align-items: start;
}

.content-card,
.section-card,
.status-card {
  padding: 1.5rem;
}

.content-card + .content-card,
.section-card + .section-card {
  margin-top: 1rem;
}

.content-card h2,
.section-card h2,
.status-card h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
}

.content-card h3,
.section-card h3 {
  margin: 1rem 0 0.5rem;
  font-size: 1.05rem;
}

.form-grid {
  display: grid;
  gap: 1rem;
}

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

.textarea {
  min-height: 220px;
  resize: vertical;
  font-family: var(--font-mono);
}

.result-panel,
.code-block {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-subtle);
  padding: 1rem;
  font-family: var(--font-mono);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.result-panel {
  min-height: 120px;
}

.result-panel[data-empty="true"] {
  color: var(--muted);
}

.result-panel--clickable {
  cursor: pointer;
}

.result-panel--clickable:hover {
  border-color: var(--border-strong);
}

/* Hash Generator: one row per algorithm with label, value and copy button. */
.hash-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hash-row {
  display: grid;
  grid-template-columns: 6.5rem 1fr auto;
  align-items: stretch;
  gap: 0.5rem;
}

.hash-row__label {
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  padding: 0 0.25rem;
}

.hash-row__value {
  margin: 0;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-subtle);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  word-break: break-all;
  white-space: pre-wrap;
  min-height: auto;
  overflow-wrap: anywhere;
}

.hash-row__value[data-empty="true"] {
  color: var(--muted);
}

.hash-row__copy {
  align-self: stretch;
}

@media (max-width: 640px) {
  .hash-row {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "label copy"
      "value value";
  }
  .hash-row__label { grid-area: label; }
  .hash-row__value { grid-area: value; }
  .hash-row__copy  { grid-area: copy; }
}

/* Color Converter widgets. */
.color-row {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 1rem;
  align-items: stretch;
}

.color-picker {
  width: 4rem;
  height: 100%;
  min-height: 4rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.color-swatch {
  width: 6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #000;
}

.color-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 0.75rem;
}

.color-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
}

.color-field > span {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.color-pair {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.5rem;
  align-items: stretch;
}

.color-pair .color-picker {
  width: 3rem;
  min-height: 2.5rem;
}

@media (max-width: 720px) {
  .color-row {
    grid-template-columns: 1fr;
  }
  .color-swatch { min-height: 4rem; }
  .color-inputs { grid-template-columns: 1fr; }
}

.contrast-preview {
  margin: 1rem 0;
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.contrast-preview__normal {
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

.contrast-preview__large {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.contrast-result {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  margin-top: 0.5rem;
}

.contrast-ratio {
  font-size: 1.1rem;
}

.contrast-verdicts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.contrast-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
}

.contrast-badge--pass {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.4);
  color: #166534;
}

.contrast-badge--fail {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.4);
  color: #991b1b;
}

/* Cron Parser: simple reference table for the 5 fields. */
.cron-fields {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0;
  font-size: 0.92rem;
}

.cron-fields th,
.cron-fields td {
  text-align: left;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.cron-fields th {
  font-weight: 600;
  background: var(--surface-subtle);
}

.diff-viewer {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
  overflow: hidden;
}

.diff-viewer[data-empty="true"] {
  color: var(--muted);
}

.diff-viewer__empty {
  margin: 0;
  padding: 1rem;
}

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

.diff-viewer__header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.diff-viewer__header span {
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
}

.diff-viewer__header span + span,
.diff-cell + .diff-cell {
  border-left: 1px solid var(--border);
}

.diff-row + .diff-row {
  border-top: 1px solid var(--border);
}

.diff-cell {
  min-width: 0;
  padding: 0.85rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.diff-cell[data-type="removed"] {
  background: var(--danger-soft);
}

.diff-cell[data-type="added"] {
  background: var(--success-soft);
}

.diff-cell[data-type="modified"] {
  background: rgba(154, 103, 0, 0.12);
}

.diff-cell--empty {
  color: var(--muted);
}

.diff-inline--remove {
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: 6px;
}

.diff-inline--add {
  background: var(--success-soft);
  color: var(--success);
  border-radius: 6px;
}

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

.compare-result-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
  overflow: hidden;
}

.compare-result-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.compare-result-card__header h3 {
  margin: 0;
}

.result-list {
  margin: 0;
  padding: 1rem 1rem 1rem 2.1rem;
  font-family: var(--font-mono);
}

.result-list li + li {
  margin-top: 0.35rem;
}

.content-list {
  margin: 0;
  padding-left: 1.2rem;
}

.content-list li + li {
  margin-top: 0.55rem;
}

.guide-cta {
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.15rem;
}

.guide-cta > * + * {
  margin-top: 0.75rem;
}

.guide-cta h2 {
  margin-bottom: 0;
}

.inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0;
  margin: 1rem 0 0;
  list-style: none;
}

.field-hint {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.field-hint.success {
  color: var(--success);
}

.field-hint.error {
  color: var(--danger);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.85rem;
}

.stat-card {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
}

.stat-card__label {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.stat-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  line-height: 1.1;
}

.control-label {
  margin: 0 0 0.55rem;
  color: var(--text);
  font-weight: 600;
}

.live-timestamp-card {
  display: grid;
  gap: 0.9rem;
}

.live-timestamp-card h2 {
  margin-bottom: 0;
}

.live-timestamp-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.compact-info-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
}

.compact-info-row {
  display: grid;
  grid-template-columns: minmax(88px, 112px) minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
}

.compact-info-row dt {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.compact-info-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.94rem;
  line-height: 1.5;
  word-break: break-word;
}

.world-time-button {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(88px, 112px) minmax(0, 1fr);
  gap: 0.85rem;
  align-items: center;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
  color: var(--text);
  text-align: left;
}

.world-time-button:hover,
.world-time-button:focus-visible {
  text-decoration: none;
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--surface-subtle) 88%, var(--accent-soft));
}

.world-time-button[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--surface-subtle));
}

.world-time-button__city {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.world-time-button__time {
  font-family: var(--font-mono);
  font-size: 0.94rem;
}

.tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.mode-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.mode-tab {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.65rem 0.9rem;
  font-weight: 600;
}

.mode-tab[aria-selected="true"] {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: transparent;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.check-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
  color: var(--text);
}

.check-option input {
  margin: 0;
}

.strength-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
}

.strength-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-weight: 700;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
}

.strength-badge[data-level="weak"] {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 25%, var(--border));
  background: var(--danger-soft);
}

.strength-badge[data-level="medium"] {
  color: #9a6700;
  border-color: color-mix(in srgb, #9a6700 25%, var(--border));
  background: rgba(154, 103, 0, 0.12);
}

.strength-badge[data-level="strong"] {
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 25%, var(--border));
  background: var(--success-soft);
}

.strength-badge[data-level="very-strong"] {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 25%, var(--border));
  background: var(--accent-soft);
}

.tab-button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.6rem 0.9rem;
  font-weight: 600;
}

.tab-button[aria-selected="true"] {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: transparent;
}

.tool-panel[hidden] {
  display: none;
}

.status-message {
  margin-top: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface-subtle);
  color: var(--muted);
}

.status-message.success {
  border-color: color-mix(in srgb, var(--success) 25%, var(--border));
  background: var(--success-soft);
  color: var(--success);
}

.status-message.error {
  border-color: color-mix(in srgb, var(--danger) 25%, var(--border));
  background: var(--danger-soft);
  color: var(--danger);
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

th,
td {
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}

tbody tr:hover {
  background: var(--surface-subtle);
}

code,
pre {
  font-family: var(--font-mono);
}

code {
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.15rem 0.35rem;
}

pre {
  margin: 0;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

.faq-list details {
  padding: 1rem 1.1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--muted);
}

.faq-list details[open] summary::after {
  content: "−";
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.85rem;
}

.emoji-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.emoji-card:hover,
.emoji-card:focus-within {
  transform: translateY(-1px);
  border-color: var(--border-strong);
}

.emoji-card__symbol {
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-subtle);
  display: grid;
  place-items: center;
  font-size: 1.65rem;
  line-height: 1;
}

.emoji-card__meta {
  min-width: 0;
}

.emoji-card__name {
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
}

.emoji-card__code {
  margin-top: 0.2rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.45;
  word-break: break-word;
}

.emoji-card__copy {
  min-width: 86px;
}

.related-card--static {
  border-style: dashed;
}

.jump-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.jump-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.4rem;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  background: var(--surface-subtle);
}

.site-footer__inner {
  align-items: start;
  padding: 1.5rem 0 2rem;
}

.footer-copy {
  max-width: 32rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: 1rem 2rem;
}

.footer-links h2 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.footer-links a {
  display: block;
  margin: 0.3rem 0;
  color: var(--muted);
}

.site-footer__credit {
  margin: 0.45rem 0 0;
  font-size: 0.875rem;
  /* Use the main text colour for contrast (>= 4.5:1 against surface-subtle).
     Earlier --muted + opacity 0.8 rendered as ~#777e87 which failed WCAG. */
  color: var(--text);
}

.site-footer__credit a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.18em;
  border-bottom: none;
  transition: opacity 0.2s ease;
}

.site-footer__credit a:hover,
.site-footer__credit a:focus-visible {
  opacity: 0.85;
  text-decoration: underline;
}

/* Make inline anchors inside prose blocks distinguishable without relying on
   colour alone (WCAG 1.4.1). Excludes button-like links (.button, .card-link,
   .related-card, .brand) which already have non-colour affordances. */
.content-card p a:not(.button):not(.card-link),
.content-card li a:not(.button):not(.card-link),
.hero p a,
.hero__panel a:not(.hero-widget__copy):not(.hero-widget__link),
.status-card p a {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.muted {
  color: var(--muted);
}

@media (max-width: 960px) {
  .layout-grid,
  .related-grid,
  .split-grid,
  .checkbox-grid,
  .compare-results-grid,
  .diff-viewer__header,
  .diff-row {
    grid-template-columns: 1fr;
  }

  .related-grid {
    gap: 0.85rem;
  }

  .diff-viewer__header span + span,
  .diff-cell + .diff-cell {
    border-left: 0;
    border-top: 1px solid var(--border);
  }

  .site-header__inner {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 0.5rem;
  }

  .site-nav.is-open {
    display: flex;
  }

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

  .footer-links {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 2.75rem;
  }

  .hero__panel,
  .content-card,
  .section-card,
  .status-card,
  .tool-card,
  .related-card {
    padding: 1.1rem;
  }

  .button-row {
    flex-direction: column;
  }

  .button,
  .button-secondary,
  .button-ghost,
  .card-link {
    width: 100%;
  }

  table {
    min-width: 540px;
  }

  .site-footer__inner {
    flex-direction: column;
  }

  .hero-widget__main {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-widget__copy {
    width: 100%;
  }

  .compact-info-row {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

  .emoji-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .emoji-card__copy {
    grid-column: 1 / -1;
    width: 100%;
  }
}