.aa-core-section {
  --aa-core-ink: #0f172a;
  --aa-core-muted: #536174;
  --aa-core-line: #dce2e9;
  --aa-core-paper: #ffffff;
  --aa-core-soft: #f6f8fa;
  --aa-core-accent: #173f34;
  --aa-core-accent-soft: #e7f0ec;
  padding: clamp(4rem, 7vw, 6.5rem) 1.25rem;
  color: var(--aa-core-ink);
  background: var(--aa-core-paper);
}

.aa-core-section--soft {
  background: var(--aa-core-soft);
  border-block: 1px solid var(--aa-core-line);
}

.aa-core-shell {
  width: min(100%, 72rem);
  margin-inline: auto;
}

.aa-core-shell--narrow {
  width: min(100%, 52rem);
}

.aa-core-eyebrow {
  margin: 0 0 0.85rem;
  color: var(--aa-core-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

.aa-core-title {
  max-width: 52rem;
  margin: 0;
  color: var(--aa-core-ink);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 750;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.aa-core-title--small {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
}

.aa-core-lede,
.aa-core-copy {
  color: var(--aa-core-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.aa-core-lede {
  max-width: 48rem;
  margin: 1.35rem 0 0;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
}

.aa-core-copy {
  margin: 0;
}

.aa-core-copy + .aa-core-copy {
  margin-top: 0.9rem;
}

.aa-core-block {
  margin-top: clamp(3rem, 6vw, 5rem);
}

.aa-core-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
}

.aa-core-grid--2,
.aa-core-grid--3 {
  grid-template-columns: 1fr;
}

.aa-core-card {
  min-width: 0;
  padding: 1.4rem;
  border: 1px solid var(--aa-core-line);
  border-radius: 0.8rem;
  background: var(--aa-core-paper);
}

.aa-core-card--accent {
  border-color: color-mix(in srgb, var(--aa-core-accent) 35%, var(--aa-core-line));
  background: var(--aa-core-accent-soft);
}

.aa-core-card h3 {
  margin: 0 0 0.65rem;
  color: var(--aa-core-ink);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.3;
}

.aa-core-card p {
  margin: 0;
  color: var(--aa-core-muted);
  line-height: 1.65;
}

.aa-core-steps {
  display: grid;
  gap: 0;
  margin: 2rem 0 0;
  padding: 0;
  border-top: 1px solid var(--aa-core-line);
  list-style: none;
  counter-reset: aa-core-step;
}

.aa-core-steps li {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--aa-core-line);
  counter-increment: aa-core-step;
}

.aa-core-steps li::before {
  content: counter(aa-core-step, decimal-leading-zero);
  color: var(--aa-core-accent);
  font: 700 0.78rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.aa-core-steps strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--aa-core-ink);
  font-size: 1rem;
}

.aa-core-steps span {
  color: var(--aa-core-muted);
  line-height: 1.65;
}

.aa-core-checklist {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.aa-core-checklist li {
  position: relative;
  padding-left: 1.55rem;
  color: var(--aa-core-muted);
  line-height: 1.6;
}

.aa-core-checklist li::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: var(--aa-core-accent);
}

.aa-core-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.aa-core-link {
  display: inline-flex;
  align-items: center;
  min-height: 2.8rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--aa-core-line);
  border-radius: 999px;
  color: var(--aa-core-ink) !important;
  background: var(--aa-core-paper);
  font-size: 0.92rem;
  font-weight: 650;
  line-height: 1.25;
  text-decoration: none;
}

.aa-core-link::after {
  content: "\2192";
  margin-left: 0.55rem;
  transition: transform 160ms ease;
}

.aa-core-link:hover::after {
  transform: translateX(0.18rem);
}

.aa-core-link:focus-visible,
.aa-core-faq summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--aa-core-accent) 55%, transparent);
  outline-offset: 3px;
}

.aa-core-faq {
  margin-top: 1.7rem;
  border-top: 1px solid var(--aa-core-line);
}

.aa-core-faq details {
  border-bottom: 1px solid var(--aa-core-line);
}

.aa-core-faq summary {
  position: relative;
  padding: 1.25rem 2.25rem 1.25rem 0;
  color: var(--aa-core-ink);
  font-weight: 700;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
}

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

.aa-core-faq summary::after {
  content: "+";
  position: absolute;
  top: 1.05rem;
  right: 0;
  color: var(--aa-core-accent);
  font-size: 1.45rem;
  font-weight: 400;
}

.aa-core-faq details[open] summary::after {
  content: "\2212";
}

.aa-core-faq details p {
  max-width: 52rem;
  margin: -0.25rem 0 1.25rem;
  color: var(--aa-core-muted);
  line-height: 1.7;
}

.aa-core-note {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--aa-core-accent);
  color: var(--aa-core-muted);
  background: var(--aa-core-accent-soft);
  line-height: 1.65;
}

html[data-theme="dark"] .aa-core-section {
  --aa-core-ink: #f2f4f7;
  --aa-core-muted: #b4bdc9;
  --aa-core-line: #343b45;
  --aa-core-paper: #11151b;
  --aa-core-soft: #171c23;
  --aa-core-accent: #87c9b1;
  --aa-core-accent-soft: #183128;
}

@media (min-width: 720px) {
  .aa-core-grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .aa-core-grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .aa-core-card {
    padding: 1.65rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .aa-core-link::after {
    transition: none;
  }
}