.certificate-item {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  background-color: var(--card-bg, rgba(17, 24, 39, 0.7));
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(245, 158, 11, 0.08);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.certificate-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
  z-index: 1;
}

.certificate-item:hover::before {
  opacity: 1;
}

.certificate-item:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: rgba(245, 158, 11, 0.35);
  box-shadow: 0 30px 60px rgba(245, 158, 11, 0.12), 0 12px 24px rgba(0, 0, 0, 0.08);
}

.certificate-item .relative {
  aspect-ratio: 4/3;
  width: 100%;
}

.certificate-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.certificate-item:hover img {
  transform: scale(1.05);
}

.certificate-item .absolute {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.85) 0%,
    rgba(0, 0, 0, 0.3) 50%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 2;
}

.certificate-item:hover .absolute {
  opacity: 1;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 1.5rem;
}

/* ============================================
   RESPONSIVE DESIGN FOR CERTIFICATES
   ============================================ */

/* Tablet (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
  .certificate-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    padding: 1.25rem;
  }
}

/* Mobile (481px - 768px) */
@media (max-width: 768px) {
  .certificate-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 1rem;
  }
  
  .certificate-item:hover {
    transform: translateY(-4px);
  }
}

/* Small Mobile (< 480px) */
@media (max-width: 480px) {
  .certificate-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0.75rem;
  }
  
  .certificate-item {
    border-radius: 0.5rem;
  }
}

/* Extra Small Mobile (< 375px) */
@media (max-width: 374px) {
  .certificate-grid {
    gap: 0.75rem;
    padding: 0.5rem;
  }
}