.download-hero {
  padding-top: calc(var(--section-space) * 0.72);
  padding-bottom: calc(var(--section-space) * 0.72);
  border-bottom: var(--border-heavy) solid var(--color-accent-dark);
}

.download-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.72fr);
  gap: 54px;
  align-items: center;
}

.download-hero-copy h1 {
  max-width: 820px;
}

.download-hero-copy .lead {
  margin-top: 26px;
}

.download-hero-copy .chip-row {
  margin-top: 26px;
}

.download-route-board {
  padding: 28px;
  border: var(--border-heavy) solid var(--color-accent-dark);
  border-radius: var(--radius-xs) var(--radius-lg) var(--radius-xs) var(--radius-lg);
  background:
    linear-gradient(var(--color-paper-line), var(--color-paper-line)),
    var(--color-panel);
  background-size: 100% 1px, auto;
}

.route-board-head {
  padding-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: var(--border-thin) dashed var(--color-border);
  color: var(--color-accent-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.route-lamp {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
  border: var(--border-medium) solid var(--color-accent-dark);
  border-radius: 50%;
  background: var(--color-error);
}

.route-steps {
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 18px;
  list-style: none;
}

.route-steps li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
}

.route-index {
  width: 42px;
  height: 34px;
  display: grid;
  place-items: center;
  border: var(--border-medium) solid var(--color-accent-dark);
  border-radius: var(--radius-xs);
  color: var(--color-cream);
  background: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 800;
}

.route-steps strong {
  color: var(--color-accent-dark);
}

.route-steps p {
  margin: 3px 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.route-doc-link {
  color: var(--color-error);
  font-weight: 850;
}

.route-doc-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.platform-intro {
  margin: 26px 0 20px;
  padding: 20px 22px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: start;
  border-left: var(--border-heavy) solid var(--color-error);
  border-radius: var(--radius-xs) var(--radius-md) var(--radius-md) var(--radius-xs);
  background: var(--color-bg);
}

.platform-intro h3 {
  margin-bottom: 7px;
}

.platform-intro p {
  max-width: 840px;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.platform-marker {
  flex-shrink: 0;
  padding: 6px 10px;
  border: var(--border-thin) dashed var(--color-accent);
  border-radius: var(--radius-xs);
  color: var(--color-accent);
  background: var(--color-panel-soft);
  font-size: 0.68rem;
  font-weight: 800;
  white-space: nowrap;
}

.client-card {
  overflow: hidden;
}

.client-heading {
  align-items: flex-start;
}

.client-heading h3 {
  margin-bottom: 7px;
}

.client-heading > div {
  min-width: 0;
}

.client-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

.client-actions {
  min-width: 220px;
  max-width: 420px;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.client-actions .button {
  min-height: 48px;
}

.official-link-line {
  margin: 10px 0 0;
  color: var(--color-text-muted);
}

.official-link-line a {
  color: var(--color-error);
  font-family: var(--font-mono);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.requirements-block {
  margin-top: 34px;
  padding-top: 28px;
  border-top: var(--border-medium) dashed var(--color-border);
}

.requirements-block h3 {
  margin-bottom: 16px;
}

.core-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.62fr);
  gap: 40px;
  align-items: end;
}

.core-heading .section-heading {
  margin-bottom: 0;
}

.core-heading .callout {
  margin: 0;
}

.core-table-wrap {
  margin-top: 36px;
}

.core-table {
  min-width: 800px;
}

.core-link {
  color: var(--color-error);
  font-weight: 800;
  white-space: nowrap;
}

.core-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.core-notes {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.core-notes .panel {
  background: var(--color-panel-soft);
}

.core-notes p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.install-sequence {
  position: relative;
  display: grid;
  gap: 14px;
}

.install-sequence::before {
  position: absolute;
  top: 25px;
  bottom: 25px;
  left: 26px;
  width: 2px;
  background: var(--color-border);
  content: "";
}

.install-step {
  position: relative;
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 20px;
  border: var(--border-medium) solid var(--color-border);
  border-radius: var(--radius-xs) var(--radius-md) var(--radius-md) var(--radius-xs);
  background: var(--color-bg);
}

.install-number {
  position: relative;
  z-index: 1;
  width: 54px;
  height: 42px;
  display: grid;
  place-items: center;
  border: var(--border-medium) solid var(--color-accent-dark);
  border-radius: var(--radius-xs);
  color: var(--color-white);
  background: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
}

.install-step h3 {
  margin-bottom: 7px;
}

.install-step p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.install-sequence + .callout a {
  color: var(--color-error);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-more {
  margin-top: 28px;
  display: flex;
  justify-content: flex-start;
}

@media (max-width: 1040px) {
  .download-hero-grid,
  .core-heading {
    grid-template-columns: minmax(0, 1fr);
  }

  .download-route-board {
    max-width: 760px;
  }

  .client-card {
    grid-template-columns: minmax(0, 1fr);
  }

  .client-actions {
    min-width: 0;
    max-width: none;
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .download-hero-grid {
    gap: 34px;
  }

  .platform-intro {
    flex-direction: column;
    gap: 12px;
  }

  .client-actions {
    width: 100%;
  }

  .client-actions .button {
    flex: 1 1 210px;
  }

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

@media (max-width: 640px) {
  .download-hero {
    padding-top: 42px;
    padding-bottom: 52px;
  }

  .download-route-board {
    padding: 20px;
  }

  .platform-intro {
    padding: 17px;
  }

  .client-card,
  .client-card.is-featured {
    padding: 20px;
  }

  .client-heading {
    gap: 11px;
  }

  .client-icon {
    width: 48px;
    height: 48px;
  }

  .client-actions .button {
    flex-basis: 100%;
    width: 100%;
  }

  .install-sequence::before {
    display: none;
  }

  .install-step {
    padding: 19px;
    grid-template-columns: minmax(0, 1fr);
    gap: 13px;
  }

  .install-number {
    width: 48px;
    height: 36px;
  }

  .faq-more .button {
    width: 100%;
  }
}