/* Certificate Gallery Styles */
.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.certificate-item {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
}

.certificate-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.certificate-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: 1px solid #eee;
}

.certificate-content {
  padding: 1.5rem;
}

.certificate-title {
  font-size: 1.2rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #333;
}

.certificate-issuer {
  color: #666;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.certificate-date {
  color: #888;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.certificate-description {
  color: #555;
  font-size: 0.9rem;
  line-height: 1.5;
}

.certificate-badge {
  display: inline-block;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  margin-top: 1rem;
}

/* Modal Styles for Full Image View */
.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
}

.modal-content {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 800px;
  max-height: 80%;
  object-fit: contain;
  margin-top: 5%;
}

.close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
  cursor: pointer;
}

.close:hover,
.close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

/* Upload Section */
.upload-section {
  background: #f8f9fa;
  border: 2px dashed #dee2e6;
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  margin-bottom: 2rem;
  transition: border-color 0.3s ease;
}

.upload-section:hover {
  border-color: #667eea;
}

.upload-icon {
  font-size: 3rem;
  color: #6c757d;
  margin-bottom: 1rem;
}

.upload-text {
  color: #6c757d;
  margin-bottom: 1rem;
}

.upload-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.upload-btn:hover {
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .certificate-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .modal-content {
    width: 95%;
    margin-top: 10%;
  }
}