/* -----------------------------
          gallery.css
   ----------------------------- */

/* -----------------------------
   Theme / variables
   ----------------------------- */
:root {
  /* Colors */
  --gallery-glow: rgba(55, 224, 255, 0.12);
  --gallery-bg: #0e0e0f;
  --gallery-text: #ffffff;

  /* Spacing & sizing */
  --gallery-radius: 14px;
  --gallery-gutter: 1.2rem;

  /* Shadows & transitions */
  --gallery-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  --gallery-shadow-hover: 0 20px 55px rgba(0, 0, 0, 0.75), 0 0 30px var(--gallery-glow);
  --transition-fast: 250ms;
  --transition-medium: 350ms;
  --max-modal-width: 1200px;
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  :root {
     --transition-fast: 0ms;
     --transition-medium: 0ms;
  }
}

/* -----------------------------
   Base layout
   ----------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

.gallery {
  padding: 5rem 2rem 0 2rem;
  color: var(--gallery-text);
  --safe-area-top: env(safe-area-inset-top, 0px);
  padding-top: calc(5rem + var(--safe-area-top));
}

/* Page / section heading */
.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 1.2rem;
  color: var(--gallery-text);
  font-weight: 600;
}

/* Grid of tiles */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gallery-gutter);
  align-items: stretch;
}

/* Responsive breakpoints */
@media (max-width: 900px) {
  .gallery-grid {
     grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 580px) {
  .gallery-grid {
     grid-template-columns: 1fr;
  }
}

/* -----------------------------
   Tile (card) styles
   ----------------------------- */
.tile {
  position: relative;
  overflow: hidden;
  border-radius: var(--gallery-radius);
  cursor: pointer;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02)), var(--gallery-bg);
  box-shadow: var(--gallery-shadow);
  transition:
    transform var(--transition-fast) ease,
    box-shadow var(--transition-fast) ease,
    filter var(--transition-fast) ease;
  outline: none;
  min-height: 160px; /* ensures consistent tile height if images vary */
  display: flex;
  align-items: center;
  justify-content: center;
}

/* better hit target for touch */
.tile::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transition: background var(--transition-fast);
  pointer-events: none;
}

/* Visible focus state for keyboard users */
.tile:focus-visible {
  box-shadow: 0 0 0 4px rgba(55, 224, 255, 0.18), var(--gallery-shadow);
  transform: translateY(-6px);
}

/* Image inside a tile */
.tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--transition-medium) ease, filter var(--transition-fast) ease;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  will-change: transform;
  /* lightweight placeholder look while loading */
  filter: blur(0);
}

/* Hover / active effects */
.tile:hover,
.tile:active {
  transform: translateY(-8px);
  box-shadow: var(--gallery-shadow-hover);
}
.tile:hover img,
.tile:active img {
  transform: scale(1.08);
}

/* subtle focus-visible style for keyboard only */
.tile:focus-visible img {
  transform: scale(1.06);
}

/* Lazy-loading low-res to high-res hint (if used) */
.tile img.loading {
  filter: blur(6px);
  transform: scale(1.02);
}

/* -----------------------------
   Modal (lightbox)
   ----------------------------- */
.gallery-modal {
  /* hidden by default; .open toggles */
  display: none; 
  position: fixed;
  inset: 0;
  background: rgba(1, 6, 10, 0.86);
  z-index: 9999; /* very high to avoid overlap */
  align-items: center;
  justify-content: center;
  padding: 1rem;
  transition: opacity var(--transition-fast) ease;
  opacity: 0;
  pointer-events: none;
  -webkit-tap-highlight-color: transparent;
}

/* visible state */
.gallery-modal.open {
  display: flex;
  opacity: 1;
  pointer-events: auto;
}

/* Container to constrain width and provide padding for large images */
.gallery-modal .modal-inner {
  max-width: var(--max-modal-width);
  width: 100%;
  max-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* Modal image */
.gallery-modal img {
  max-width: 92%;
  max-height: 85vh;
  width: auto;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
  transform: scale(0.98);
  transition: transform var(--transition-medium) ease, opacity var(--transition-fast) ease;
  opacity: 0;
  display: block;
  will-change: transform, opacity;
}

/* when modal open, animate image in */
.gallery-modal.open img {
  transform: scale(1);
  opacity: 1;
}

/* Close control */
.modal-close {
  position: absolute;
  top: 22px;
  right: 28px;
  background: rgba(0,0,0,0.25);
  border: 0;
  font-size: 2.4rem;
  color: var(--gallery-text);
  cursor: pointer;
  padding: 6px 10px;
  line-height: 1;
  border-radius: 8px;
  z-index: 10000;
  transition: background var(--transition-fast);
}

/* Hover + active for close button */
.modal-close:hover,
.modal-close:active {
  background: rgba(255,255,255,0.06);
}

/* Focus ring for close button */
.modal-close:focus-visible {
  outline: 3px solid rgba(55, 224, 255, 0.22);
  border-radius: 6px;
}

/* On small screens, reduce modal image size a bit */
@media (max-width: 420px) {
  .gallery-modal img {
     max-width: 96%;
     max-height: 78vh;
  }
  .modal-close {
     top: 12px;
     right: 16px;
     font-size: 2rem;
  }
}

/* -----------------------------
   Accessibility helpers
   ----------------------------- */

/* Ensure interactive tiles announce themselves as buttons to assistive tech */
.tile[role="button"] {
  -webkit-tap-highlight-color: transparent;
}

/* Make focus visible when keyboard-only users navigate */
:focus:not(:focus-visible) {
  outline: none;
}

/* Prevent scrolling of page content while modal open (fallback, JS also toggles) */
.no-scroll {
  overflow: hidden !important;
  height: 100%;
}

/* Trap focus hint: visually hide helper elements used by JS focus trap, if any */
.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

/* -----------------------------
   Minor niceties
   ----------------------------- */
/* Make images non-selectable for nicer drag behavior */
/* Make images non-selectable for nicer drag behavior */
.tile img,
.gallery-modal img {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
/* Reduce opacity slightly for disabled/hidden thumbnails (if needed) */
.tile[aria-hidden="true"] {
  opacity: 0.4;
  pointer-events: none;
}

/* End of file */