/* ============================================================
   Portfolio grid — square tiles with hover scale + overlay
   ============================================================ */

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

/* === Tile === */
.project-tile {
  display: block;
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  background: var(--color-surface);
  cursor: pointer;
  text-decoration: none;
}

.project-tile__image-wrap {
  /* position: absolute + inset: 0 is required for mobile Safari/iOS.
     When a grid item's height comes from aspect-ratio (not an explicit value),
     children with height: 100% resolve to 0 in WebKit.
     Absolutely positioning the wrap against the tile bypasses this. */
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.project-tile__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(60%);
  transform: scale(1);
  transition:
    transform 0.5s ease,
    filter 0.4s ease;
}

.project-tile:hover .project-tile__image,
.project-tile:focus-visible .project-tile__image {
  transform: scale(1.06);
  filter: grayscale(0%);
}

/* === Overlay (caption) === */
.project-tile__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--overlay-dark);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-tile:hover .project-tile__overlay,
.project-tile:focus-visible .project-tile__overlay {
  opacity: 1;
}

.project-tile__label {
  font-family: var(--font-display);
  font-weight: var(--fw-semi);
  font-size: 1rem;
  color: var(--color-white);
  text-align: center;
  padding: 0 var(--space-md);
  letter-spacing: 0.02em;
}

/* === Focus ring === */
.project-tile:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* === Gallery tiles (no label) === */
.project-tile--gallery .project-tile__image {
  filter: grayscale(40%);
}
.project-tile--gallery:hover .project-tile__image {
  filter: grayscale(0%);
}

/* === Responsive === */
@media (max-width: 1023px) {
  .project-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 599px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}