/* Step 1: prepare the figure */
.activate-hover .wp-block-post-featured-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
}

/* Step 2: dark overlay */
.activate-hover .wp-block-post-featured-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

/* Step 3: button */
.activate-hover .wp-block-post-featured-image::before {
  content: "Read More";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 12px 28px;
  border-radius: 50px;
  background: #fff;
  color: #000;
  font-weight: 600;
  font-size: 16px;
  text-align: center;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 2;
  pointer-events: none; /* won't break the image link if it already exists */
}

/* Step 4: hover state */
.activate-hover:hover .wp-block-post-featured-image::after {
  opacity: 1;
}

.activate-hover:hover .wp-block-post-featured-image::before {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.05);
}