/* ============================================================
   WESTCOAST DRAFTING — grid.css
   Masonry portfolio grid, figure tiles, hover overlays,
   loading skeleton, and responsive breakpoints.
   ============================================================ */

/* ── Section wrapper ─────────────────────────────────────── */
#portfolio {
  background: var(--color-bg);
  padding-top: clamp(60px, 8vw, 100px);
  padding-bottom: clamp(60px, 8vw, 100px);
}

/* ── Masonry Grid ────────────────────────────────────────── */
.masonry-grid {
  columns: 3 280px;
  column-gap: 10px;
  padding: 0 var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
}

/* ── Grid Item ───────────────────────────────────────────── */
.grid-item {
  break-inside: avoid;
  display: inline-block; /* prevents column breaks in Safari */
  width: 100%;
  margin-bottom: 10px;
  overflow: hidden;
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  background: var(--color-border);
  /* GPU compositing hint */
  will-change: transform;
}

.grid-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.55s var(--ease-out);
  /* Prevent layout shift: images won't have a natural size until loaded */
  object-fit: cover;
}

/* Subtle scale on hover */
.grid-item:hover img {
  transform: scale(1.04);
}

/* ── Hover Overlay ───────────────────────────────────────── */
.grid-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(26, 26, 46, 0.85) 0%,
    rgba(26, 26, 46, 0.25) 50%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px 20px;
  opacity: 0;
  transition: opacity 0.35s var(--ease-out);
}

.grid-item:hover .grid-item__overlay,
.grid-item:focus-visible .grid-item__overlay {
  opacity: 1;
}

.grid-item__title {
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  line-height: 1.4;
  margin-bottom: 4px;
}

.grid-item__year {
  color: var(--color-gold-lt);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.1em;
}

/* Expand icon */
.grid-item__expand {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid rgba(255,255,255,0.6);
  border-radius: 50%;
  color: rgba(255,255,255,0.85);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.grid-item:hover .grid-item__expand {
  opacity: 1;
  transform: scale(1);
}

/* ── Loading Skeleton ────────────────────────────────────── */
.grid-skeleton {
  break-inside: avoid;
  display: inline-block;
  width: 100%;
  margin-bottom: 10px;
  border-radius: 3px;
  background: linear-gradient(
    90deg,
    var(--color-border) 25%,
    #ede9e1 50%,
    var(--color-border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* Varying skeleton heights to mimic masonry variety */
.grid-skeleton:nth-child(3n+1) { aspect-ratio: 4/3; }
.grid-skeleton:nth-child(3n+2) { aspect-ratio: 3/4; }
.grid-skeleton:nth-child(3n)   { aspect-ratio: 1/1; }

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Photo Count Badge ───────────────────────────────────── */
.grid-item__count {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px 4px 8px;
  background: rgba(10, 10, 18, 0.72);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.9);
  pointer-events: none;
  z-index: 2;
  transition: opacity 0.25s;
}

.grid-item:hover .grid-item__count {
  opacity: 0;  /* fade out on hover so overlay can breathe */
}

/* ── Empty / Error State ─────────────────────────────────── */
.grid-empty {
  padding: 80px var(--gutter);
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .masonry-grid { columns: 2 240px; }
}

@media (max-width: 540px) {
  .masonry-grid {
    columns: 1;
    padding: 0 16px;
  }
  .grid-item__overlay { opacity: 1; } /* always visible on touch */
}