.center {
  margin: auto;
  width: 50%;
  padding: 10px;
}

.pdf-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 50px;
}
.pdf-col {
  flex: 1 1 calc(25% - 20px); /* 4 per row */
  text-align: center;
  border: 2px solid #ed9a00;
  padding: 30px 10px;
  border-radius: 20px;
}
.pdf-col:hover {
  transform: translateY(-3px);
}

.pdf-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #000000;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.3s ease;
}
.pdf-link:hover {
  color: #000000;
  text-decoration: underline;
}
.pdf-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 8px;
}