/* Showcase page: SVG ambient background gallery (default overlay: none — patterns stay visible in previews) */
#ks-bg-gallery-root {
  --ks-gallery-overlay: none;
}

#ks-bg-gallery-root.ks-bg-overlay--none {
  --ks-gallery-overlay: none;
}
#ks-bg-gallery-root.ks-bg-overlay--soft {
  --ks-gallery-overlay: soft;
}
#ks-bg-gallery-root.ks-bg-overlay--medium {
  --ks-gallery-overlay: medium;
}
#ks-bg-gallery-root.ks-bg-overlay--strong {
  --ks-gallery-overlay: strong;
}

.ks-bg-gallery-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  font-size: 0.85rem;
}

.ks-bg-gallery-toolbar label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  color: var(--forge-text-2);
}

.ks-bg-gallery-toolbar select {
  background: var(--forge-surface-2);
  color: var(--forge-text);
  border: 1px solid var(--forge-border);
  border-radius: 6px;
  padding: 0.2rem 0.45rem;
  font-size: 0.8rem;
}

.ks-bg-gallery-card {
  border: 1px solid var(--forge-border);
  border-radius: 12px;
  background: var(--forge-surface);
  margin-bottom: 2rem;
  overflow: hidden;
}

.ks-bg-gallery-card__head {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--forge-border);
  background: color-mix(in srgb, var(--forge-surface-2) 55%, var(--forge-surface));
}

.ks-bg-gallery-card__title {
  font-family: var(--font-label, inherit);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--forge-amber);
  margin-bottom: 0.25rem;
}

.ks-bg-gallery-card__name {
  font-size: 1.05rem;
  color: var(--forge-text);
  margin: 0 0 0.35rem;
}

.ks-bg-gallery-card__meta {
  font-size: 0.78rem;
  color: var(--forge-text-3);
  margin: 0;
}

.ks-bg-gallery-contexts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
  padding: 1rem;
}

.ks-bg-preview-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--forge-text-4);
  margin-bottom: 0.35rem;
}

.ks-bg-preview-frame {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--forge-border);
  min-height: 5rem;
}

.ks-bg-preview--hero .ks-bg-preview-frame {
  min-height: 7.5rem;
}

.ks-bg-preview--section .ks-bg-preview-frame {
  min-height: 5.5rem;
}

.ks-bg-preview--card .ks-bg-preview-frame {
  min-height: 6rem;
}

.ks-bg-preview--compact .ks-bg-preview-frame {
  min-height: 3.25rem;
  max-width: 140px;
}

/* Fill the frame: parent min-height does not stretch auto-height children; flex-grow does. */
.ks-bg-preview-frame .ks-has-ambient-bg {
  flex: 1 1 auto;
  min-height: 5rem;
  width: 100%;
  box-sizing: border-box;
}

.ks-bg-preview--hero .ks-bg-preview-frame .ks-has-ambient-bg {
  min-height: 7.5rem;
}

.ks-bg-preview--section .ks-bg-preview-frame .ks-has-ambient-bg {
  min-height: 5.5rem;
}

.ks-bg-preview--card .ks-bg-preview-frame .ks-has-ambient-bg {
  min-height: 6rem;
}

.ks-bg-preview--compact .ks-bg-preview-frame .ks-has-ambient-bg {
  min-height: 3.25rem;
}

/* Preview tiles: patterns must read clearly (still subtle, but visible). */
#ks-bg-gallery-root .ks-has-ambient-bg {
  isolation: auto;
}

.ks-bg-preview-frame .ks-ambient-bg {
  opacity: var(--ks-bg-ambient-opacity, 0.62);
  z-index: 0;
}

/* Gallery previews: keep patterns visible; density still tunes strength */
#ks-bg-gallery-root.ks-bg-density--low .ks-bg-preview-frame .ks-ambient-bg {
  opacity: 0.55;
}
#ks-bg-gallery-root.ks-bg-density--medium .ks-bg-preview-frame .ks-ambient-bg {
  opacity: 0.82;
}
#ks-bg-gallery-root.ks-bg-density--high .ks-bg-preview-frame .ks-ambient-bg {
  opacity: 1;
}

#ks-bg-gallery-root .ks-bg-preview-frame .ks-ambient-bg-overlay {
  z-index: 1;
}

.ks-bg-preview-frame .ks-content {
  padding: 0.5rem 0.65rem;
  font-size: 0.72rem;
  color: var(--forge-text);
  text-shadow: 0 1px 2px color-mix(in srgb, var(--forge-bg) 40%, transparent);
}

.ks-bg-preview--hero .ks-content {
  padding: 1rem;
  font-size: 0.8rem;
  max-width: 70%;
}

.ks-bg-preview--card .glass {
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--forge-surface) 55%, transparent);
  border: 1px solid var(--forge-border);
  margin: 0.5rem;
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  font-size: 0.72rem;
}

#ks-bg-gallery-root.ks-bg-density--low .ks-bg-preview-frame {
  --ks-bg-ambient-opacity: 0.4;
}
#ks-bg-gallery-root.ks-bg-density--medium .ks-bg-preview-frame {
  --ks-bg-ambient-opacity: 0.62;
}
#ks-bg-gallery-root.ks-bg-density--high .ks-bg-preview-frame {
  --ks-bg-ambient-opacity: 0.88;
}

/* Non-@supports: map overlay strength with rgba approximations */
#ks-bg-gallery-root.ks-bg-overlay--none .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: transparent;
}
#ks-bg-gallery-root.ks-bg-overlay--soft .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: rgba(10, 14, 23, 0.12);
}
html[data-bs-theme="light"] #ks-bg-gallery-root.ks-bg-overlay--soft .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: rgba(244, 247, 251, 0.22);
}
#ks-bg-gallery-root.ks-bg-overlay--medium .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: rgba(10, 14, 23, 0.22);
}
html[data-bs-theme="light"] #ks-bg-gallery-root.ks-bg-overlay--medium .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: rgba(244, 247, 251, 0.38);
}
#ks-bg-gallery-root.ks-bg-overlay--strong .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: rgba(10, 14, 23, 0.38);
}
html[data-bs-theme="light"] #ks-bg-gallery-root.ks-bg-overlay--strong .ks-bg-preview-frame .ks-ambient-bg-overlay {
  background: rgba(244, 247, 251, 0.55);
}

@supports (background: color-mix(in srgb, red 50%, blue)) {
  #ks-bg-gallery-root.ks-bg-overlay--none .ks-bg-preview-frame .ks-ambient-bg-overlay {
    background: transparent;
  }
  #ks-bg-gallery-root.ks-bg-overlay--soft .ks-bg-preview-frame .ks-ambient-bg-overlay {
    background: color-mix(in srgb, var(--forge-bg) 16%, transparent);
  }
  #ks-bg-gallery-root.ks-bg-overlay--medium .ks-bg-preview-frame .ks-ambient-bg-overlay {
    background: color-mix(in srgb, var(--forge-bg) 32%, transparent);
  }
  #ks-bg-gallery-root.ks-bg-overlay--strong .ks-bg-preview-frame .ks-ambient-bg-overlay {
    background: color-mix(in srgb, var(--forge-bg) 52%, transparent);
  }
}

#ks-bg-gallery-root.ks-bg-suppressed .ks-ambient-bg {
  opacity: 0 !important;
  visibility: hidden;
}

/*
 * Gallery preview tiles: slow CSS translate on each root SVG. Supplements SMIL (slow / stuck
 * engines) so every pattern shows gentle drift; disabled when Pause is on or reduced motion.
 */
@media (prefers-reduced-motion: no-preference) {
  #ks-bg-gallery-root:not(.ks-bg-gallery--animations-paused)
    .ks-bg-preview-frame
    .ks-ambient-bg
    > svg {
    animation: ks-gallery-ambient-css-drift 52s ease-in-out infinite alternate;
  }
}

@keyframes ks-gallery-ambient-css-drift {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(1.2%, 0.85%);
  }
}