:root {
  --bg: #ffffff;
  --surface: #f8f9fb;
  --fg: #2d323b;
  --muted: #646b79;
  --heading: #181c23;
  --border: #e3e7ee;
  --primary: #0172ad;
  --primary-hover: #015887;
  --primary-fg: #ffffff;
  --code-bg: #f1f3f6;
  --ok: #2f7d12;
  --ok-bg: #eaf5e3;
  --warn: #9a5b00;
  --warn-bg: #fdf1dc;
  --bad: #b3261e;
  --bad-bg: #fbe7e5;
  --neutral: #5b6270;
  --neutral-bg: #eef0f4;
  --radius: 0.4rem;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #13171f;
    --surface: #181d26;
    --fg: #c2c7d0;
    --muted: #8a91a0;
    --heading: #e6e9ee;
    --border: #2a303c;
    --primary: #3cb4f0;
    --primary-hover: #74caf5;
    --primary-fg: #0b1118;
    --code-bg: #1f2530;
    --ok: #7cc95a;
    --ok-bg: #1d2a19;
    --warn: #e7b04d;
    --warn-bg: #2e2513;
    --bad: #f0857c;
    --bad-bg: #321b1a;
    --neutral: #a3a9b6;
    --neutral-bg: #232934;
    color-scheme: dark;
  }
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
}

a {
  color: var(--primary);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--primary-hover);
}

h1,
h2,
h3,
h4 {
  color: var(--heading);
  line-height: 1.2;
  margin: 1.5rem 0 0.6rem;
}

h4 {
  font-size: 1rem;
}

p {
  margin: 0 0 0.8rem;
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--code-bg);
  border-radius: 0.25rem;
}

code {
  padding: 0.1em 0.35em;
  overflow-wrap: anywhere;
}

pre {
  padding: 0.75rem 1rem;
  overflow-x: auto;
  margin: 0 0 1rem;
}

ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.2rem;
}

.container {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Navigation */

header {
  border-bottom: 1px solid var(--border);
}

header nav.container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
}

nav ul {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav li + li {
  margin: 0;
}

nav a {
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--heading);
}

.brand-logo {
  display: block;
  width: 2.5rem;
  height: auto;
  flex-shrink: 0;
}

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

main {
  padding-block: 2rem 4rem;
}

/* Search */

.search {
  display: flex;
  margin-bottom: 1rem;
}

.search input {
  flex: 1;
  min-width: 0;
  font: inherit;
  font-size: 1.1rem;
  padding: 0.7rem 1rem;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--border);
  border-right: 0;
  border-radius: var(--radius) 0 0 var(--radius);
}

.search input:focus {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
}

.search button {
  font: inherit;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  color: var(--primary-fg);
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
}

.search button:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.search button[aria-busy="true"] {
  opacity: 0.7;
  cursor: progress;
}

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

.examples button {
  font: inherit;
  color: var(--primary);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

/* Results header */

.results-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin: 2rem 0 0.25rem;
}

.results-header h2 {
  margin: 0;
  font-size: 1.75rem;
  overflow-wrap: anywhere;
}

.toggle-all {
  font: inherit;
  font-size: 0.9rem;
  color: var(--primary);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Overview tiles */

.overview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
  gap: 0.6rem;
  margin: 1.25rem 0 0.5rem;
}

.tile {
  display: block;
  padding: 0.65rem 0.8rem;
  text-decoration: none;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--tone, var(--neutral));
  border-radius: var(--radius);
}

.tile:hover {
  border-color: var(--primary);
  border-left-color: var(--tone, var(--neutral));
  color: var(--fg);
}

.tile .label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}

.tile .value {
  display: block;
  font-weight: 600;
  color: var(--heading);
  overflow-wrap: anywhere;
}

/* Sections */

.group-heading {
  font-size: 1.35rem;
  margin-top: 2.5rem;
}

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

details.section {
  border-bottom: 1px solid var(--border);
}

details.section:first-of-type {
  border-top: 1px solid var(--border);
}

details.section > summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 0;
  cursor: pointer;
  list-style: none;
}

details.section > summary::-webkit-details-marker {
  display: none;
}

details.section > summary::before {
  content: "";
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 0.15s;
}

details.section[open] > summary::before {
  transform: rotate(45deg);
}

details.section > summary h3 {
  flex: 1;
  margin: 0;
  font-size: 1.2rem;
}

details.section > summary:hover h3 {
  color: var(--primary);
}

.section-body {
  padding: 0 0 1.25rem 1.25rem;
}

.section-body > .explainer {
  color: var(--muted);
}

/* Pills */

.pill {
  flex: none;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  color: var(--tone, var(--neutral));
  background: var(--tone-bg, var(--neutral-bg));
  white-space: nowrap;
}

.ok {
  --tone: var(--ok);
  --tone-bg: var(--ok-bg);
}

.warn {
  --tone: var(--warn);
  --tone-bg: var(--warn-bg);
}

.bad {
  --tone: var(--bad);
  --tone-bg: var(--bad-bg);
}

.neutral {
  --tone: var(--neutral);
  --tone-bg: var(--neutral-bg);
}

/* Alerts */

.alert {
  padding: 0.65rem 0.9rem;
  margin: 0 0 0.6rem;
  border-left: 4px solid var(--tone);
  background: var(--tone-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.alert strong {
  color: var(--tone);
}

.alert code {
  background: transparent;
  padding: 0;
}

/* Facts and tables */

dl.facts {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.35rem 1.25rem;
  margin: 0 0 1rem;
}

dl.facts dt {
  color: var(--muted);
}

dl.facts dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}

th,
td {
  text-align: left;
  padding: 0.4rem 0.75rem 0.4rem 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
}

td.yes {
  color: var(--ok);
}

td.no {
  color: var(--bad);
}

.empty {
  color: var(--muted);
  font-style: italic;
}

.small-button {
  font: inherit;
  font-size: 0.9rem;
  padding: 0.3rem 0.8rem;
  color: var(--primary);
  background: transparent;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  cursor: pointer;
}

.bimi-logo {
  display: block;
  width: 6rem;
  height: 6rem;
  margin: 0.5rem 0 1rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: #fff;
  object-fit: contain;
}

/* Loading */

.loading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted);
  margin-top: 2rem;
}

.spinner {
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation-duration: 3s;
  }
}

@media (max-width: 520px) {
  dl.facts {
    grid-template-columns: 1fr;
    gap: 0 0;
  }

  dl.facts dd {
    margin-bottom: 0.5rem;
  }

  .section-body {
    padding-left: 0;
  }
}

/* TXT records: long tokens wrap rather than widen the page */

.txt-records {
  list-style: none;
  padding-left: 0;
}

.txt-records li + li {
  margin-top: 0.35rem;
}

.txt-records code {
  display: inline-block;
  max-width: 100%;
  word-break: break-all;
}