/*
Layout for the homepage portfolio grid (see ../bk-portfolio-grid.php).
Matches the original hand-built Cornerstone grid it replaces: three columns
with a 48px gap (the original's .x-column right-margin), each image framed
by 30px padding with 50px below it before the next row, and a title caption
overlaid on the image, revealed on hover/focus rather than shown underneath
at all times.
*/

.bk-portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0 48px;
}

.bk-portfolio-grid-item {
  display: block;
  position: relative;
  box-sizing: border-box;
  padding: 30px 30px 80px;
}

.bk-portfolio-grid-item img {
  display: block;
  width: 100%;
  height: auto;
}

.bk-portfolio-grid-caption {
  position: absolute;
  top: 30px;
  right: 30px;
  bottom: 80px;
  left: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1em;
  text-align: center;
  font-size: 1.5em;
  line-height: 1.4;
  color: #000;
  background-color: rgba(255, 255, 255, 0.85);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.bk-portfolio-grid-item:hover .bk-portfolio-grid-caption,
.bk-portfolio-grid-item:focus .bk-portfolio-grid-caption,
.bk-portfolio-grid-item:focus-within .bk-portfolio-grid-caption {
  opacity: 1;
}

@media (max-width: 979px) {
  .bk-portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .bk-portfolio-grid {
    grid-template-columns: 1fr;
  }
}