/* ============================================================
   research.css — Research page styles
   ============================================================ */

/* ─── Page shell ─────────────────────────────────────────── */
.research-page {
  margin-top: var(--nav-h);
  padding: clamp(3rem, 6vw, 5rem) clamp(1.5rem, 8vw, 8rem);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

/* ─── Page header ────────────────────────────────────────── */
.research-header {
  margin-bottom: clamp(3rem, 7vw, 5.5rem);
}

.research-header__heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 1.2rem;
}

.research-header__intro {
  font-size: 0.97rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-muted);
  max-width: 580px;
}

/* ─── Topics container ───────────────────────────────────── */
.topics {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ─── Single topic ───────────────────────────────────────── */
.topic {
  display: grid;
  grid-template-columns: 3fr 2fr;   /* text gets 60%, carousel 40% */
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
  padding: clamp(3rem, 6vw, 5rem) 0;
}

/* Alternate layout — carousel on left, text on right */
.topic--reverse {
  direction: rtl;
}
.topic--reverse > * {
  direction: ltr;
}

/* ─── Text side ──────────────────────────────────────────── */
.topic__text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.topic__index {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--cream-dark);
  line-height: 1;
  letter-spacing: -0.02em;
  /* Subtle outline effect */
  -webkit-text-stroke: 1px rgba(122, 158, 126, 0.35);
  user-select: none;
}

.topic__title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.25;
  margin-top: -0.5rem;
}

.topic__title em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.topic__body {
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-muted);
}

.topic__body em {
  font-style: italic;
  color: var(--ink);
}

/* Tags */
.topic__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.5rem;
}

.tag {
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(77, 122, 82, 0.08);
  border: 1px solid rgba(77, 122, 82, 0.22);
  padding: 0.28rem 0.7rem;
  border-radius: 20px;
  white-space: nowrap;
}

/* ─── Carousel ───────────────────────────────────────────── */
.topic__carousel {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  position: relative;
  align-items: center;   /* centre the square within the column */
}

/* Fixed square — width driven by the 2fr column, aspect-ratio locks height */
.carousel__track {
  position: relative;
  width: 90%;            /* slightly smaller than the column itself */
  aspect-ratio: 1 / 1;  /* always a square regardless of image ratio */
  background: var(--cream-dark);
  border-radius: 6px;
  overflow: hidden;
  box-shadow:
    inset 0 0 0 1px rgba(0,0,0,0.06),
    0 12px 40px rgba(0,0,0,0.08);
}

/* Each slide */
.carousel__slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}

.carousel__slide.active {
  opacity: 1;
  pointer-events: auto;
}

.carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 1rem;
}

/* Placeholder shown when no images are found */
.carousel__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--ink-faint);
}

.carousel__placeholder svg {
  opacity: 0.3;
}

.carousel__placeholder p {
  font-size: 0.78rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  opacity: 0.6;
  text-align: center;
  padding: 0 1.5rem;
}

/* Controls row */
.carousel__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.carousel__prev,
.carousel__next {
  background: none;
  border: 1px solid rgba(0,0,0,0.12);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--ink-muted);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  flex-shrink: 0;
}

.carousel__prev:hover,
.carousel__next:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(77, 122, 82, 0.06);
}

/* Dots */
.carousel__dots {
  display: flex;
  gap: 5px;
  align-items: center;
}

.carousel__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  opacity: 0.3;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
}

.carousel__dot.active {
  opacity: 1;
  background: var(--accent);
  transform: scale(1.3);
}

/* ─── Section divider ────────────────────────────────────── */
.topic__divider {
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(122, 158, 126, 0.3), transparent);
  margin: 0;
}

/* ─── Scroll reveal (shared with about.css pattern) ─────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 860px) {
  .topic,
  .topic--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 2rem;
  }

  .topic--reverse .topic__text     { order: 1; }
  .topic--reverse .topic__carousel { order: 2; }

  .carousel__track {
    width: 75%;          /* square stays square, just narrower on mobile */
  }
}

@media (max-width: 480px) {
  .research-page {
    padding: 2rem 1.2rem;
  }

  .topic__index {
    font-size: 1.0rem;

  }

  .carousel__track {
    width: 92%;
  }
}