.explore-hero,
.explore-directory,
.explore-boundary {
  width: min(100% - 2.5rem, 82rem);
  margin-inline: auto;
}

.explore-hero {
  padding: clamp(4.5rem, 10vw, 8rem) 0 clamp(4rem, 8vw, 7rem);
  border-bottom: 1px solid var(--theme-rule-standard);
}

.explore-eyebrow,
.explore-section-heading > p,
.explore-card-type {
  margin: 0;
  color: var(--theme-provenance-ink);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  line-height: 1.5;
  text-transform: uppercase;
}

.explore-hero h1 {
  max-width: 16ch;
  margin: 1rem 0 1.25rem;
  color: var(--theme-ink-primary);
  font-family: var(--serif-display);
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 300;
  letter-spacing: -0.055em;
  line-height: 0.96;
}

.explore-lede {
  max-width: 48rem;
  margin: 0;
  color: var(--theme-ink-secondary);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.5;
}

.explore-directory { padding: clamp(3rem, 7vw, 6rem) 0 2rem; }

.explore-section-heading h2 {
  max-width: 24ch;
  margin: 0.55rem 0 0;
  color: var(--theme-ink-primary);
  font-family: var(--serif-display);
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.explore-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.explore-card {
  display: grid;
  min-height: 12rem;
  grid-template-rows: auto 1fr auto;
  gap: 1rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--theme-rule-standard);
  color: var(--theme-ink-primary);
  text-decoration: none;
  transition: border-color 100ms ease-out, transform 100ms ease-out;
}

.explore-card:hover { border-color: var(--theme-rule-interactive); transform: translateY(-2px); }
.explore-card:focus-visible { outline: 2px solid var(--theme-focus-ring); outline-offset: 4px; }
.explore-card strong { display: inline-flex; align-self: center; align-items: center; gap: 0.8rem; min-width: 0; font-family: var(--serif-display); font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 400; letter-spacing: -0.035em; line-height: 1; }
/* Official artwork, sized only. See the matching note in home-observatory.css: 32px is Circle's
   stated minimum for the USDC Token Logo, and neither mark is masked, tinted or redrawn. */
.entity-mark { display: inline-block; flex: 0 0 auto; width: 32px; height: 32px; object-fit: contain; }
.explore-card-action { color: var(--theme-ink-link); font-family: var(--mono); font-size: 0.74rem; line-height: 1.5; }
.explore-card-action i { font-style: normal; }

.explore-boundary {
  max-width: 64rem;
  margin-top: 2rem;
  padding: 1.25rem 0 clamp(4rem, 8vw, 8rem);
  border-top: 1px solid var(--theme-rule-standard);
  color: var(--theme-provenance-ink);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 700px) {
  .explore-hero,
  .explore-directory,
  .explore-boundary { width: min(100% - 2.5rem, 40rem); }
  .explore-hero { padding-top: 4rem; }
  .explore-hero h1 { font-size: clamp(2.8rem, 15vw, 4.4rem); }
  .explore-card-grid { grid-template-columns: 1fr; }
  .explore-card { min-height: 9.5rem; }
}

@media (min-width: 701px) and (max-width: 1050px) {
  .explore-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  .explore-card { transition: none; }
}