/**
 * Flexible Tile Grid
 * Responsive grid of tiles with background images and centered labels.
 * Tiles can have a fixed aspect ratio (defaulting to square) or an automatic height based on content.
 */

.square-tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
}

.square-tile-grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.square-tile-grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
.square-tile-grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
.square-tile-grid--cols-6 { grid-template-columns: repeat(6, 1fr); }

.square-tile-grid__item { display: block; }

.square-tile {
  position: relative;
  display: block;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

.square-tile--link { text-decoration: none; color: inherit; }

.square-tile__inner {
  position: relative;
  width: 100%;
  /* Allows for custom aspect ratios (e.g., '4 / 3') or 'auto' for content-driven height. */
  /* Defaults to square if --tile-ratio is not set. */
  aspect-ratio: var(--tile-ratio, 1 / 1);
  /* Provides a minimum height when aspect-ratio is 'auto' or if content is sparse. */
  min-height: var(--tile-min-height, 140px);
  max-height: var(--tile-max-height, 140px);
  background-image: var(--tile-bg, none);
  background-size: cover;
  background-position: center;
}

.square-tile__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.15), rgba(0,0,0,0.55));
}

.square-tile__label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-white);
  text-align: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  line-height: 1.2;
  padding: 0 var(--spacing-sm);
  text-shadow: 0 1px 2px rgba(0,0,0,0.6);
}

.square-tile:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.square-tile:hover .square-tile__inner {
  filter: brightness(1.05);
}

@media (max-width: 575px) {
  .square-tile-grid {
    gap: var(--spacing-sm);
    grid-template-columns: repeat(2, 1fr);
  }
  .square-tile__label { font-size: var(--font-size-base); }
}