/*
 * LIGHTBOX
 * ========
 * Click a screenshot or filmstrip frame to open it large in an
 * in-page overlay instead of being kicked to a new tab. Closes on
 * background click, the Esc key, or the explicit close button.
 *
 * The overlay sits above everything (z-index 1000), traps focus on the
 * close button, and respects prefers-reduced-motion via the universal
 * rule in elements.css.
 */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.92);
  cursor: zoom-out;
  opacity: 0;
  transition: opacity var(--motion-fast);
}

.lightbox--open {
  display: flex;
  opacity: 1;
}

.lightbox-figure {
  position: relative;
  max-width: 95vw;
  max-height: 95vh;
  margin: 0;
  cursor: default;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.lightbox-img {
  display: block;
  max-width: 95vw;
  max-height: 85vh;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  background: var(--color-surface-card);
}

.lightbox-caption {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  text-align: center;
  max-width: 80vw;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: var(--color-surface-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  font-size: 1.4rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--motion-fast), transform var(--motion-fast);
}
.lightbox-close:hover,
.lightbox-close:focus-visible {
  background: var(--color-blue-tint);
  transform: scale(1.06);
}

/*
 * Thumbnail trigger — wraps the <img> so keyboard activation just
 * works via native <button> semantics. The button itself stays
 * invisible; the hover affordance lives on the inner image.
 */
.lightbox-trigger {
  padding: 0;
  margin: 0;
  background: none;
  border: 0;
  cursor: zoom-in;
  display: inline-block;
  line-height: 0;
  border-radius: var(--radius-sm);
}
.lightbox-trigger:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}
.lightbox-trigger img {
  transition: transform var(--motion-fast), box-shadow var(--motion-fast);
}
.lightbox-trigger:hover img,
.lightbox-trigger:focus-visible img {
  transform: scale(1.01);
  box-shadow: var(--shadow-md);
}