:root {
  --bg: #ffffff;
  --bg-soft: #f5f8fa;
  --fg: #15232e;
  --fg-soft: #51626f;
  --accent: #0c8f9b;
  --accent-deep: #0a6f79;
  --brand-1: #0c6770;
  --brand-2: #0a4951;
  --border: #e2e9ed;
  --radius: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* Avoid a lone word on the last line of headings, questions, and paragraphs. */
h1, h2, h3, .faq-toc a { text-wrap: balance; }
p, li { text-wrap: pretty; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nowrap { white-space: nowrap; }

/* Partner logo bar */
.topbar {
  background: #fff;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}

.logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 2.75rem;
}

.logos img {
  width: auto;
  vertical-align: middle;
}

.logo-ns { height: 54px; }

/* Hero */
.hero {
  background: linear-gradient(155deg, var(--brand-1) 0%, var(--brand-2) 100%);
  color: #fff;
  padding: 4.5rem 0 4.75rem;
  text-align: center;
}

.kicker {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  max-width: 38rem;
  margin: 0 auto 1.4rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 800;
  line-height: 1.08;
  margin: 0 auto 2.25rem;
  max-width: 18ch;
  letter-spacing: -0.025em;
}

.cta-row {
  display: flex;
  gap: 0.85rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.7rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: transform 0.12s ease, background 0.12s ease, box-shadow 0.12s ease;
  /* Default appearance (used on light backgrounds, e.g. the compatibility page callout) */
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(12, 143, 155, 0.25);
}

.btn:hover { background: var(--accent-deep); }

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: #fff;
  color: var(--brand-1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.btn-primary:hover { background: #f0fbfb; }

.btn-ghost {
  background: transparent;
  box-shadow: none;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); }

/* Sections */
main.wrap { padding-top: 4rem; padding-bottom: 4rem; }

section + section { margin-top: 3rem; }

h2 {
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
}

/* Large intro statement below the hero (compatibility subpage) */
.lede {
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
}

.about p { font-size: 1.1rem; color: var(--fg-soft); }
.about strong { color: var(--fg); }

a { color: var(--accent); }
.about a { font-weight: 600; }

/* Callout */
.callout {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
}

.callout > p {
  margin: 0 0 1rem;
  color: var(--fg-soft);
}

.callout > p strong { color: var(--fg); }

.callout ol {
  margin: 0;
  padding-left: 1.25rem;
}

.callout li { margin: 0.5rem 0; }

/* FAQ */
.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  background: var(--bg);
  overflow: hidden;
}

.faq summary {
  cursor: pointer;
  padding: 1.1rem 1.25rem;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

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

/* Hover-revealed direct link to a question; margin-left: auto keeps it at
   the right edge, just before the "+" marker. */
.faq summary .faq-link {
  display: inline-flex;
  align-items: center;
  margin-left: auto;
  color: var(--accent);
  opacity: 0;
  transition: opacity 0.12s ease;
}

.faq summary:hover .faq-link,
.faq summary .faq-link:focus-visible { opacity: 1; }

@media (hover: none) {
  .faq summary .faq-link { opacity: 0.45; }
}

/* Chevron marker: points down (v) when closed, up (^) when open. */
.faq summary::after {
  content: "";
  flex: none;
  width: 0.45em;
  height: 0.45em;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: translateY(-25%) rotate(45deg);
  transition: transform 0.2s ease;
}

.faq details[open] summary::after { transform: translateY(25%) rotate(225deg); }

.faq .answer {
  padding: 0 1.25rem 1.1rem;
  color: var(--fg-soft);
}

.faq .answer p { margin: 0.5rem 0; }

.soon {
  font-weight: 600;
  color: var(--accent);
}
/* Subpage */
.hero.subpage { padding: 3rem 0 3.25rem; }

.hero.subpage h1 { margin-bottom: 1.25rem; }

.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.back-link:hover { text-decoration: underline; }

.stub {
  font-style: italic;
  color: var(--fg-soft);
}

/* FAQ band with side table of contents (compatibility subpage) */
.faq-band {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 3rem 0;
}

.faq-inner {
  width: 100%;
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.faq-layout {
  display: grid;
  grid-template-columns: 15rem 1fr;
  gap: 2.5rem;
  align-items: start;
  margin-top: 1.5rem;
}

.faq-toc { position: sticky; top: 1.5rem; }

.faq-toc h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-soft);
  margin: 0 0 0.75rem;
}

.faq-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border);
}

.faq-toc a {
  display: block;
  padding: 0.4rem 0 0.4rem 1rem;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--fg-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  line-height: 1.35;
}

.faq-toc a:hover { color: var(--accent); }

.faq-toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 600;
}

.faq-group { scroll-margin-top: 1.5rem; }
.faq-group + .faq-group { margin-top: 2.5rem; }

.faq-group h3 {
  font-size: 1.2rem;
  margin: 0 0 1rem;
}

.faq-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  flex-wrap: wrap;
}

/* Mini variant of .btn, right-aligned within the FAQ heading. */
.faq-expand-toggle.btn {
  margin-left: auto;
  padding: 0.28rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
  border: 0;
  border-radius: 999px;
  box-shadow: none;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

/* Chevron: points down (v) when collapsed, flips up (^) when expanded. */
.faq-expand-toggle.btn::after {
  content: "";
  width: 0.42em;
  height: 0.42em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-0.12em) rotate(45deg);
  transition: transform 0.15s ease;
}

.faq-expand-toggle.btn.is-open::after {
  transform: translateY(0.12em) rotate(-135deg);
}

/* Right-aligned actions cluster (search + expand toggle) in the FAQ heading. */
.faq-head-actions {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.faq-head-actions .faq-expand-toggle.btn { margin-left: 0; }

.faq-search-input {
  font-family: inherit;
  font-weight: 400;
  font-size: 0.85rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--fg);
  min-width: 14rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.faq-search-input::placeholder { color: var(--fg-soft); }

.faq-search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(12, 143, 155, 0.15);
}

.faq-no-results {
  color: var(--fg-soft);
  margin-top: 1rem;
}

@media (max-width: 40rem) {
  .faq-head-actions { width: 100%; }
  .faq-search-input { flex: 1 1 auto; min-width: 0; }
}

@media (max-width: 52rem) {
  .faq-layout { grid-template-columns: 1fr; gap: 1.25rem; }
  .faq-toc { position: static; }
  .faq-toc ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-left: 0;
  }
  .faq-toc a {
    margin-left: 0;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
  }
  .faq-toc a.active { border-color: var(--accent); }
}

/* Warning callout (compatibility subpage) */
.warning {
  background: #fff8e6;
  border: 1px solid #f0d68a;
  border-left: 4px solid #e0a800;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-top: 1.5rem;
  color: var(--fg);
}

.warning-title {
  margin: 0 0 0.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--fg-soft);
}

.warning p { margin: 0 0 0.75rem; }
.warning ol { margin: 0; padding-left: 1.25rem; }
.warning li { margin: 0.5rem 0; }

/* Button rows below warning/callout text */
.warning .cta-row,
.callout .cta-row {
  padding: 0.75rem 0 0.25rem;
}

/* Setup instructions band (compatibility subpage) */
.setup-band {
  border-top: 1px solid var(--border);
  padding: 3rem 0 1rem;
}

.setup-band > .wrap > h2 { margin-bottom: 1.5rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  background: var(--bg-soft);
}

.disclaimer {
  font-size: 0.85rem;
  color: var(--fg-soft);
  margin: 0;
  text-align: center;
}