/* ============================================================================
   BK Chapters — editorial "one weave per viewport" stack
   ========================================================================== */

.bk-chapter {
  display: grid;
  background-color: rgb(var(--color-background));
  color: rgb(var(--color-foreground));
}

/* text follows the scheme foreground (ink on light, cream on dark) — override
   the brand classes' hard-coded ink so dark chapters stay legible */
.bk-chapter__text { color: rgb(var(--color-foreground)); }
.bk-chapter__title,
.bk-chapter__body,
.bk-chapter__quote { color: inherit; }
.bk-chapter__eyebrow { color: inherit; opacity: 0.7; }
.bk-chapter__body p { margin: 0 0 1em; }
.bk-chapter__quote { margin-top: var(--bk-space-2); opacity: 0.92; }

/* ---- Media ---------------------------------------------------------------- */
.bk-chapter__media {
  position: relative;
  min-height: 56vh;
  overflow: clip;
  background: var(--bk-bg-stone);
}
.bk-chapter__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.bk-chapter__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: radial-gradient(130% 130% at 60% 30%, var(--bk-olive-muted), var(--bk-olive-deep));
}
.bk-chapter__placeholder .bk-eyebrow { color: rgba(241, 234, 217, 0.6); }

/* ---- Text ----------------------------------------------------------------- */
.bk-chapter__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--bk-space-5);
  padding: clamp(2.5rem, 6vw, 6rem);
}
.bk-chapter__title { margin: 0; max-width: 16ch; }

.bk-chapter__cta {
  align-self: flex-start;
  font-family: var(--bk-font-body);
  font-size: var(--bk-fs-body);
  font-weight: 500;
  letter-spacing: var(--bk-tracking-button);
  color: inherit;
  text-decoration: none;
  padding-bottom: 2px;
  background-image: linear-gradient(var(--bk-brass), var(--bk-brass));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 28% 1px;
  transition: background-size var(--bk-dur-fast) var(--bk-ease);
}
.bk-chapter__cta:hover,
.bk-chapter__cta:focus-visible { background-size: 100% 1px; }

/* ============================================================================
   DESKTOP — split, alternating sides
   ========================================================================== */
@media screen and (min-width: 750px) {
  .bk-chapter {
    grid-template-columns: 1fr 1fr;
    min-height: 86vh;
    align-items: stretch;
  }
  .bk-chapter__media { min-height: auto; }
  .bk-chapter--media-left .bk-chapter__media { grid-column: 1; grid-row: 1; }
  .bk-chapter--media-left .bk-chapter__text  { grid-column: 2; grid-row: 1; }
  .bk-chapter--media-right .bk-chapter__media { grid-column: 2; grid-row: 1; }
  .bk-chapter--media-right .bk-chapter__text  { grid-column: 1; grid-row: 1; }
}

/* ============================================================================
   REVEAL (progressive enhancement)
   ========================================================================== */
.bk-reveal-ready .bk-chapter__text > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--bk-dur-slow) var(--bk-ease), transform var(--bk-dur-slow) var(--bk-ease);
}
.bk-chapter__text.is-in > * { opacity: 1; transform: none; }
.bk-chapter__text.is-in > *:nth-child(2) { transition-delay: 0.08s; }
.bk-chapter__text.is-in > *:nth-child(3) { transition-delay: 0.16s; }
.bk-chapter__text.is-in > *:nth-child(4) { transition-delay: 0.24s; }
.bk-chapter__text.is-in > *:nth-child(5) { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  .bk-reveal-ready .bk-chapter__text > * { opacity: 1; transform: none; transition: none; }
}