/* AI Model FAQ — shared responsive styles */
:root {
  --color-bg: #f7f3ec;
  --color-surface: #fffdf9;
  --color-ink: #29251f;
  --color-muted: #655e55;
  --color-line: #d9cfc0;
  --color-accent: #a95434;
  --color-accent-dark: #7f3d26;
  --color-link: #7f3d26;
  --color-link-hover: #542617;
  --shadow-soft: 0 12px 32px rgb(41 37 31 / 8%);
  --content-width: 1120px;
  --reading-width: 760px;
  --radius: 14px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: Georgia, "Times New Roman", Times, serif;
}

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

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-ink);
  background:
    radial-gradient(circle at top right, rgb(169 84 52 / 8%), transparent 28rem),
    var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-link);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}
a:hover { color: var(--color-link-hover); }

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  transform: translateY(-180%);
  border-radius: 8px;
  background: var(--color-ink);
  color: #fff;
  text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-line);
  background: #f7f3eceb;
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header__inner,
.site-footer__inner,
.container {
  width: min(calc(100% - 2rem), var(--content-width));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-ink);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--color-accent-dark); }

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--color-ink);
  color: #fff8ee;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-surface);
  padding: 0.5rem 0.75rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  color: var(--color-ink);
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.25rem 1.15rem;
  font-size: 0.94rem;
}
.site-nav a {
  color: var(--color-ink);
  text-decoration: none;
}
.site-nav a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

main { display: block; }

.container {
  padding-block: clamp(2rem, 5vw, 4rem);
}

.content { max-width: var(--reading-width); }

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--color-accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.18;
  text-wrap: balance;
}

h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  letter-spacing: -0.04em;
  max-width: 22ch;
}

h2 {
  margin: 2.6rem 0 0.85rem;
  font-size: clamp(1.4rem, 3.5vw, 1.85rem);
  letter-spacing: -0.025em;
}

h3 {
  margin: 1.6rem 0 0.5rem;
  font-size: 1.15rem;
}

p, ul, ol { margin-block: 0 1.15rem; }

.lede {
  max-width: 68ch;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
}

.note {
  color: var(--color-muted);
  font-size: 0.92rem;
}

.callout {
  margin-block: 1.75rem;
  padding: clamp(1.15rem, 3vw, 1.5rem);
  border: 1px solid var(--color-line);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}
.callout p:last-child { margin-bottom: 0; }

/* Cards (home) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.15rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 100%;
  padding: 1.35rem 1.4rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  color: inherit;
}
.card__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 750;
  color: var(--color-ink);
}
.card__desc {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
  flex: 1;
}
.card__meta {
  margin: 0.35rem 0 0;
  font-size: 0.82rem;
  color: var(--color-accent-dark);
  font-weight: 650;
}

/* Breadcrumbs */
.breadcrumbs {
  margin-bottom: 1.35rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumbs a {
  color: var(--color-muted);
  text-decoration: none;
}
.breadcrumbs a:hover { color: var(--color-accent-dark); text-decoration: underline; }
.breadcrumbs li:not(:last-child)::after {
  margin-left: 0.6rem;
  color: var(--color-line);
  content: "/";
}

/* Tables */
.table-wrap {
  width: min(100%, var(--content-width));
  overflow-x: auto;
  margin-block: 1.25rem 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.95rem;
}
caption {
  padding: 0.85rem 1rem 0;
  color: var(--color-muted);
  text-align: left;
  font-size: 0.88rem;
}
th, td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}
th {
  background: #eee4d6;
  font-weight: 700;
}
tr:last-child td { border-bottom: none; }
td .verify {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* Steps */
.page-steps {
  display: grid;
  gap: 1rem;
  margin-block: 1.5rem;
  padding: 0;
  list-style: none;
  counter-reset: setup-step;
}
.page-steps > li {
  position: relative;
  padding: 1.25rem 1.35rem 1.25rem 4.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  counter-increment: setup-step;
}
.page-steps > li::before {
  position: absolute;
  top: 1.2rem;
  left: 1.15rem;
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  border-radius: 999px;
  background: var(--color-ink);
  color: #fff8ee;
  content: counter(setup-step);
  font-weight: 800;
  font-size: 0.95rem;
}
.page-steps h3 { margin-top: 0; margin-bottom: 0.4rem; }
.page-steps p:last-child { margin-bottom: 0; }

/* Sources */
.sources {
  margin: 1.25rem 0 0;
  padding-left: 1.25rem;
}
.sources li { margin-bottom: 0.5rem; }

/* FAQ */
.faq-list {
  display: grid;
  gap: 0.75rem;
  margin-block: 1.5rem;
}
.faq-list details {
  border: 1px solid var(--color-line);
  border-radius: 10px;
  background: var(--color-surface);
}
.faq-list summary {
  cursor: pointer;
  padding: 1rem 1.15rem;
  font-weight: 700;
  list-style-position: outside;
}
.faq-list summary::-webkit-details-marker { color: var(--color-accent); }
.faq-list__answer {
  padding: 0 1.15rem 1.15rem;
}
.faq-list__answer p:last-child { margin-bottom: 0; }

/* Footer */
.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--color-line);
  background: var(--color-ink);
  color: #f8f1e7;
}
.site-footer__inner { padding-block: 2.25rem; }
.site-footer a { color: #f8f1e7; }
.site-footer__meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}
.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}
.site-footer__nav a { text-decoration: none; }
.site-footer__nav a:hover { text-decoration: underline; }
.disclaimer {
  max-width: 92ch;
  margin: 0;
  font-size: 0.88rem;
  color: #d7cbbb;
}
.site-footer__tagline {
  margin: 0 0 0.35rem;
  font-weight: 700;
}

/* Home hero */
.hero {
  max-width: var(--reading-width);
  margin-bottom: 2.5rem;
}
.hero h1 { max-width: 16ch; }

.section-label {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; align-items: center; }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 1rem;
    gap: 0.65rem;
  }
  .site-nav.is-open { display: flex; }
  .site-header__inner {
    flex-wrap: wrap;
    padding-block: 0.85rem;
  }
  .site-footer__meta { flex-direction: column; }
  th, td { padding: 0.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card:hover { transform: none; }
}

.editorial-note { max-width: 760px; margin-top: 4rem; border-top: 1px solid var(--color-line); padding-top: .5rem; }
.editorial-note p { color: var(--color-muted); }
.card-grid { grid-template-columns: repeat(auto-fill, minmax(min(100%, 340px), 1fr)); }
.card { padding: 1.8rem; }
.hero { padding-block: 1rem 1.5rem; }
@media (min-width: 900px) { .hero h1 { font-size: 4.4rem; max-width: 18ch; } }