/* ── Exhibit Cover / End Card ──────────────────────
   Shared "title screen" pattern for opening and closing
   an exhibit. Used for:
     - Cover:   <div id="exhibit-cover" class="exhibit-cover">
     - End:     <div id="exhibit-end-card"
                     class="exhibit-cover exhibit-cover--end is-hidden">

   Each exhibit sets the hero image via a CSS custom property:
     <div class="exhibit-cover" style="--cover-image: url('./cover.jpg');">
*/

/* ── Wrapper ──────────────────────────────────── */
.exhibit-cover {
  position: absolute;
  inset: 0;
  /* Stacked above every exhibit-internal layer, including step content
     with custom z-index (e.g. floating chart cards). */
  z-index: 1000;
  display: block;
  padding: 0;
  background: var(--grass-3);
  opacity: 1;
  transition: opacity 0.8s ease;
  overflow: hidden;
}
.exhibit-cover.is-leaving {
  opacity: 0;
  pointer-events: none;
}
.exhibit-cover.is-entering {
  animation: cover-fade-in 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.exhibit-cover.is-hidden {
  display: none;
}
@keyframes cover-fade-in {
  from {
    opacity: 0;
    transform: scale(1.015);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .exhibit-cover.is-entering {
    animation: none;
  }
}

/* ── Hero image + gradient ─────────────────────── */
/* Each exhibit sets background-image inline on this div:
     <div class="exhibit-cover-image" style="background-image: url('./cover.jpg');"></div>
   Relative URLs are resolved against the HTML, which is what we want. */
.exhibit-cover-image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.exhibit-cover-gradient {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to top,
      rgba(6, 20, 28, 0.88) 0%,
      rgba(6, 20, 28, 0.55) 28%,
      rgba(6, 20, 28, 0.2) 52%,
      transparent 80%
    ),
    linear-gradient(to right, rgba(6, 20, 28, 0.35) 0%, transparent 45%);
}

/* ── Content block (cover variant) ─────────────── */
.exhibit-cover-content {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: clamp(28px, 5vw, 56px);
  color: #fff;
  max-width: 680px;
}

.exhibit-cover-kicker {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 12px;
}

.exhibit-cover-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  font-weight: 600;
  line-height: 1.08;
  color: #fff;
  margin: 0 0 14px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
}

.exhibit-cover-lede {
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 1.3vw, 1.1rem);
  font-weight: 400;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.88);
  margin: 0 0 24px;
  max-width: 52ch;
}

/* ── Primary CTA pill ──────────────────────────── */
.exhibit-cover-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px 12px 20px;
  border: none;
  border-radius: 999px;
  background: #fff;
  color: var(--wrmp-ada-teal);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  transition:
    transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.25s ease,
    background 0.15s ease;
}
.exhibit-cover-cta:hover,
.exhibit-cover-cta:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.34);
  outline: none;
  background: #f6f8f9;
}
.exhibit-cover-cta svg {
  width: 14px;
  height: 14px;
  fill: var(--wrmp-ada-teal);
}

/* ── Step-dot row (journey indicator) ──────────── */
.exhibit-cover-journey {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.exhibit-cover-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.exhibit-cover-dot {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.45);
}

.exhibit-cover-dot.is-pulsing {
  background: #fff;
  animation: cover-dot-pulse 2.4s ease-in-out infinite;
}

@keyframes cover-dot-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.55);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(255, 255, 255, 0);
    transform: scale(1.15);
  }
}

@media (prefers-reduced-motion: reduce) {
  .exhibit-cover-dot.is-pulsing {
    animation: none;
  }
}

/* ── End-card variant (same hero, "journey complete") ── */
.exhibit-cover--end .exhibit-cover-gradient {
  background: linear-gradient(
    to top,
    rgba(6, 20, 28, 0.32) 0%,
    rgba(6, 20, 28, 0.08) 45%,
    transparent 75%
  );
}

.exhibit-cover--end .exhibit-cover-content {
  left: clamp(24px, 3.5vw, 48px);
  right: auto;
  bottom: clamp(24px, 3.5vw, 48px);
  padding: clamp(28px, 3vw, 40px);
  max-width: 560px;
  background: rgba(8, 20, 28, 0.62);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 4px 12px rgba(0, 0, 0, 0.2);
}

.exhibit-cover-dots--complete {
  margin-bottom: 16px;
}
.exhibit-cover-dot.is-done {
  background: #fff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.12);
}

.exhibit-cover-links-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.72);
  margin: 0 0 10px;
}

.exhibit-cover-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0 0 24px;
}
.exhibit-cover-link {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}
.exhibit-cover-link:hover,
.exhibit-cover-link:focus-visible {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.42);
  transform: translateY(-1px);
  outline: none;
}

.exhibit-cover-link--featured {
  background: rgba(34, 139, 156, 0.32);
  border-color: rgba(134, 204, 216, 0.42);
  font-weight: 600;
  padding: 9px 16px;
}
.exhibit-cover-link--featured:hover,
.exhibit-cover-link--featured:focus-visible {
  background: rgba(34, 139, 156, 0.48);
  border-color: rgba(134, 204, 216, 0.65);
}

.exhibit-cover-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.exhibit-cover-cta--secondary {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  box-shadow: none;
}
.exhibit-cover-cta--secondary:hover,
.exhibit-cover-cta--secondary:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.82);
}