.pdf-download-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin: 2rem 0;
}

.pdf-grid-card {
  background: #fff;
  border-radius: 1rem;
  box-shadow: 0 2px 16px rgba(0,0,0,0.10);
  overflow: hidden;
  transition: box-shadow 0.2s;
  text-align: center;
  padding: 1rem;
}

.pdf-grid-card a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.pdf-thumb {
  width: 100%;
  aspect-ratio: 1/1.41;
  object-fit: cover;
  border-radius: 0.5rem;
  transition: transform 0.25s cubic-bezier(.25,.8,.25,1), box-shadow 0.25s;
  box-shadow: 0 0 0 rgba(0,0,0,0.0);
}

.pdf-grid-card:hover .pdf-thumb,
.pdf-grid-card:focus-within .pdf-thumb {
  transform: scale(1.07);
  box-shadow: 0 4px 24px rgba(0,0,0,0.13);
}

.pdf-grid-card h4 {
  margin: 1rem 0 0.5rem;
  font-size: 1.15rem;
}

.pdf-grid-card p {
  color: #444;
  font-size: 0.96rem;
  margin-bottom: 0;
}