/* 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;
}

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

/* -----------------------------
    Layout
    ----------------------------- */
.gallery {
  padding: 5rem 2rem 0 2rem;
}

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

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

/* 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: var(--gallery-bg);
  box-shadow: var(--gallery-shadow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  /* For keyboard accessibility */
  outline: none;
}

/* Visible focus state for keyboard users */
.tile:focus-visible {
  box-shadow: 0 0 0 3px 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);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

/* 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);
}

/* -----------------------------
    Modal (lightbox)
    ----------------------------- */
.gallery-modal {
  display: none; /* toggled by .open class */
  position: fixed;
  inset: 0;
  background: rgba(1, 6, 10, 0.86);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  /* Ensure modal children are centered */
}
.gallery-modal.open {
  display: flex;
}

/* Modal image */
.gallery-modal img {
  max-width: 92%;
  max-height: 85vh;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
}

/* Close control */
.modal-close {
  position: absolute;
  top: 22px;
  right: 28px;
  background: transparent;
  border: 0;
  font-size: 2.4rem;
  color: var(--gallery-text);
  cursor: pointer;
  padding: 6px;
  line-height: 1;
}

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

/* Small screens: slightly reduce spacing inside modal */
@media (max-width: 420px) {
  .gallery-modal img {
     max-width: 96%;
     max-height: 78vh;
  }
}