/* About — Signal Chronicle with alternating editorial splits + stock visuals. */

.page-about {
  overflow-x: hidden;
}

.chronicle {
  position: relative;
  z-index: 1;
  isolation: isolate;
  min-height: calc(100svh - var(--nav-h));
  padding-block: clamp(2.25rem, 7vh, 4.75rem) clamp(2.75rem, 8vh, 5.5rem);
  border-bottom: 1px solid var(--color-border-subtle);
}

.chronicle__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: clamp(2.5rem, 6vh, 4.25rem);
}

.chronicle__approach {
  max-width: min(42rem, 100%);
}

.chronicle__title {
  margin: 0 0 clamp(0.85rem, 2vh, 1.25rem);
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--color-text-primary);
  text-wrap: pretty;
}

.chronicle__lead {
  max-width: 52ch;
  color: var(--color-text-secondary);
}

.chronicle__intro-para {
  margin: 0.95rem 0 0;
  max-width: 58ch;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.chronicle__chapters {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(2.25rem, 5.5vh, 3.75rem);
}

.chronicle__chapter {
  max-width: none;
  margin: 0;
  padding-block: clamp(1.25rem, 3vh, 2rem);
  border-top: 1px solid var(--color-border-subtle);
  scroll-margin-top: calc(var(--nav-h) + 1rem);
  align-items: center;
}

.chronicle__body {
  min-width: 0;
  max-width: min(40rem, 100%);
}

.chronicle__index {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: var(--fs-body-sm);
  letter-spacing: 0.06em;
  color: var(--color-accent);
  opacity: 0.85;
}

.chronicle__heading {
  margin: 0 0 clamp(0.75rem, 1.8vh, 1.1rem);
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  color: var(--color-text-primary);
  text-wrap: pretty;
}

.chronicle__para {
  margin: 0 0 0.9rem;
  max-width: 58ch;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.chronicle__para:last-child {
  margin-bottom: 0;
}

.chronicle .media-well__photo {
  object-fit: cover;
  background: color-mix(in srgb, var(--color-surface-elevated) 70%, transparent);
}

.chronicle__cta {
  display: flex;
  justify-content: center;
  padding-top: clamp(0.75rem, 2.5vh, 1.75rem);
}

.chronicle__cta .btn:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
}

@media (max-width: 1023px) {
  .chronicle__chapter.editorial-split--media-start .editorial-split__media {
    order: 0;
  }
}

@media (max-width: 320px) {
  .chronicle {
    padding-inline: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .chronicle,
  .chronicle * {
    animation: none !important;
    transition: none !important;
  }
}