.publications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.publication-item {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.5rem;
  transition: transform 0.3s ease;
}

.publication-item:hover {
  transform: translateY(-5px);
}

.publication-preview {
  aspect-ratio: 1/1.414;
  /* A4 paper ratio */
  background: var(--black);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.publication-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 5px;
}

.publication-info {
  flex: 1;
}

.publication-info h3 {
  color: var(--green);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.publication-info p {
  color: var(--light-grey);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.publication-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.publication-actions a,
.publication-actions button {
  padding: 0.5rem 1rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.publication-actions a {
  background: var(--green);
  color: var(--black);
  text-decoration: none;
}

.publication-actions a:hover {
  background: var(--light-grey);
}

.publication-actions button {
  background: transparent;
  border: 1px solid var(--green);
  color: var(--green);
}

.publication-actions button:hover {
  background: var(--green);
  color: var(--black);
}

/* Modal for PDF preview */
.pdf-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
}

.pdf-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-modal-content {
  width: 90%;
  height: 90%;
  background: var(--black);
  padding: 1rem;
  border-radius: 10px;
  position: relative;
}

.pdf-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--green);
  color: var(--black);
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* Make the entire publication card behave like a link */
.publication-item {
  text-decoration: none;
  color: inherit;
  display: flex;
  /* ensure anchors behave like original cards */
}

/* Responsive Design */
@media (max-width: 768px) {
  .publications-grid {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .publication-item {
    padding: 1rem;
  }

  .publication-actions {
    flex-direction: column;
  }

  .publication-actions a,
  .publication-actions button {
    width: 100%;
    text-align: center;
  }
}