/* Arcana Capabilities Index — homepage editorial component
   Numbered rail (01–07) + auto-rotating preview stage.
   Palette inherits the campaign-section cream/ink tokens. */

.cap-index {
  display: grid;
  grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

/* ── Left rail ─────────────────────────────────────────────────────── */

.cap-index__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid rgba(20, 18, 14, 0.14);
}

.cap-index__item {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 18px;
  width: 100%;
  padding: 16px 10px 16px 14px;
  background: none;
  border: 0;
  border-bottom: 1px solid rgba(20, 18, 14, 0.14);
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
}

.cap-index__num {
  flex-shrink: 0;
  min-width: 34px;
  font-family: "Bodoni Moda", serif;
  font-style: italic;
  font-size: 20px;
  line-height: 1;
  color: var(--campaign-muted);
  transition: color 160ms ease;
}

.cap-index__body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.cap-index__title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--campaign-muted);
  transition: color 160ms ease;
}

.cap-index__sub {
  font-size: 12.5px;
  color: var(--campaign-muted);
  opacity: 0.75;
}

.cap-index__bar {
  position: absolute;
  left: 14px;
  bottom: -1px;
  height: 2px;
  width: 100%;
  max-width: calc(100% - 14px);
  transform-origin: left center;
  transform: scaleX(0);
  background: var(--vermilion, #FF4D24);
}

.cap-index__item.is-active {
  background: rgba(20, 18, 14, 0.035);
}
.cap-index__item.is-active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: -1px;
  width: 3px;
  background: var(--vermilion, #FF4D24);
}
.cap-index__item.is-active .cap-index__num,
.cap-index__item.is-active .cap-index__title {
  color: var(--campaign-text);
}
.cap-index__item:hover,
.cap-index__item:focus-visible {
  background: rgba(20, 18, 14, 0.06);
}
.cap-index__item:focus-visible {
  outline: 2px solid var(--vermilion, #FF4D24);
  outline-offset: -2px;
}

/* Progress sweep on the ACTIVE item only */
.cap-index__item.is-running .cap-index__bar {
  transform: scaleX(1);
  transition: transform var(--cap-interval, 4500ms) linear;
}

/* ── Right stage ───────────────────────────────────────────────────── */

.cap-index__stage {
  position: sticky;
  top: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.cap-index__media {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--campaign-card-border);
  background: var(--campaign-card-bg);
  box-shadow: var(--campaign-card-shadow);
}

.cap-index__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 350ms ease;
}

.cap-index__media img.is-visible {
  opacity: 1;
}

.cap-index__detail {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.cap-index__heading {
  margin: 0;
  font-family: "Bodoni Moda", serif;
  font-weight: 600;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.15;
  color: var(--campaign-text);
}

.cap-index__desc {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.6;
  color: var(--campaign-muted);
}

.cap-index__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  margin-top: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--campaign-text);
  text-decoration: none;
  border-bottom: 1px solid var(--vermilion, #FF4D24);
  padding-bottom: 2px;
}
.cap-index__cta svg {
  width: 16px;
  height: 16px;
  transition: transform 160ms ease;
}
.cap-index__cta:hover svg {
  transform: translateX(3px);
}
.cap-index__cta:hover {
  color: var(--vermilion, #FF4D24);
}

/* ── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 1023px) {
  .cap-index {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .cap-index__list {
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    border-top: none;
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
  }
  .cap-index__item {
    flex: 0 0 auto;
    scroll-snap-align: start;
    border-bottom: none;
    border-right: 1px solid rgba(20, 18, 14, 0.14);
    padding: 10px 14px;
  }
  .cap-index__sub {
    display: none;
  }
  .cap-index__stage {
    position: static;
  }
}

@media (max-width: 560px) {
  .cap-index__num {
    font-size: 17px;
    min-width: 26px;
  }
  .cap-index__media {
    aspect-ratio: 3 / 2;
  }
}

/* Reduced motion: no fades, no sweeps */
@media (prefers-reduced-motion: reduce) {
  .cap-index__media img,
  .cap-index__bar {
    transition: none !important;
  }
  .cap-index__item.is-running .cap-index__bar {
    display: none;
  }
}