.explainer-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 80% 10%, rgba(107, 158, 30, 0.12), transparent 32rem),
    radial-gradient(circle at 8% 30%, rgba(5, 150, 105, 0.12), transparent 28rem),
    var(--bg);
}

.explainer-hero {
  padding: calc(var(--nav-h) + 88px) 0 72px;
  border-bottom: 1px solid var(--border-subtle);
}

.explainer-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.7fr);
  gap: 64px;
  align-items: end;
}

.explainer-hero h1 {
  max-width: 840px;
  font-size: clamp(44px, 7vw, 86px);
  letter-spacing: -0.045em;
  margin-bottom: 24px;
}

.explainer-hero__intro {
  max-width: 720px;
  font-size: clamp(18px, 2vw, 22px);
}

.catalog-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(10, 26, 18, 0.76);
}

.catalog-summary__item {
  padding: 24px;
}

.catalog-summary__item + .catalog-summary__item {
  border-left: 1px solid var(--border);
}

.catalog-summary__number {
  display: block;
  color: var(--text);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.catalog-summary__label {
  color: var(--text-muted);
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.explainer-catalog {
  padding: 88px 0 104px;
}

.catalog-header {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  align-items: end;
  margin-bottom: 36px;
}

.catalog-header h2 {
  margin-bottom: 0;
}

.catalog-header__note {
  max-width: 480px;
  text-align: right;
}

.explainer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.explainer-card {
  display: flex;
  flex-direction: column;
  min-height: 430px;
  padding: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, rgba(10, 26, 18, 0.96), rgba(6, 15, 11, 0.82));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.explainer-card--restricted {
  border-color: rgba(107, 158, 30, 0.38);
}

.explainer-card:only-child {
  grid-column: 1 / -1;
}

.explainer-card__topline,
.explainer-card__meta,
.explainer-card__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid rgba(107, 158, 30, 0.38);
  border-radius: 999px;
  color: #CDE78E;
  background: rgba(107, 158, 30, 0.1);
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--chartreuse);
  box-shadow: 0 0 0 4px rgba(107, 158, 30, 0.12);
}

.explainer-card__state {
  color: var(--text-subtle);
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.explainer-card h3 {
  font-size: clamp(28px, 4vw, 40px);
  margin: 36px 0 16px;
}

.explainer-card__summary {
  max-width: 680px;
  font-size: 17px;
}

.explainer-card__topics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0;
  list-style: none;
}

.explainer-card__topics li {
  padding: 6px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.025);
  font-size: 12px;
}

.explainer-card__meta {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-subtle);
  font: 500 12px/1.5 var(--font-mono);
}

.explainer-card__meta span + span::before {
  content: "·";
  margin-right: 10px;
  color: var(--green);
}

.explainer-card__footer {
  justify-content: space-between;
  margin-top: 24px;
}

.explainer-card__access-note {
  max-width: 380px;
  color: var(--text-subtle);
  font-size: 13px;
}

.visibility-section {
  padding: 88px 0;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-section);
}

.visibility-intro {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  margin-bottom: 44px;
}

.visibility-intro h2 {
  margin-bottom: 0;
}

.visibility-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--border-subtle);
}

.visibility-card {
  min-height: 190px;
  padding: 26px;
  background: #08140E;
}

.visibility-card h3 {
  margin-bottom: 12px;
  font-size: 16px;
}

.visibility-card p {
  font-size: 14px;
}

.visibility-card--active {
  box-shadow: inset 0 3px 0 var(--chartreuse);
}

.visibility-card__marker {
  display: block;
  margin-bottom: 22px;
  color: var(--green);
  font: 600 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .explainer-hero__grid,
  .visibility-intro {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .catalog-header {
    display: block;
  }

  .catalog-header__note {
    margin-top: 16px;
    text-align: left;
  }

  .explainer-grid {
    grid-template-columns: 1fr;
  }

  .visibility-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .explainer-hero {
    padding-top: calc(var(--nav-h) + 56px);
  }

  .catalog-summary,
  .visibility-grid {
    grid-template-columns: 1fr;
  }

  .catalog-summary__item + .catalog-summary__item {
    border-left: 0;
    border-top: 1px solid var(--border);
  }

  .explainer-card {
    min-height: 0;
    padding: 26px;
  }

  .explainer-card__footer {
    align-items: flex-start;
    flex-direction: column;
  }
}