.cert-section {
  padding: 120px 10%;
  text-align: center;
  background: radial-gradient(
    circle at top,
    rgba(157, 118, 255, 0.08),
    transparent 80%
  );
  animation: fadeInUp 1.1s ease both;
}
.text-header-certs {
  padding-bottom: 40px;
  margin-top: -2rem;
}

.cert-container {
  display: grid;
  grid-template-columns: repeat(3, minmax(300px, 1fr));
  justify-content: center;
  gap: 2.5rem;
  margin-top: 4rem;
}

.cert-card {
  position: relative;
  padding: 2rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(14px);
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
  cursor: pointer;
  overflow: hidden;
}

.cert-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 22px;
  background: linear-gradient(
    135deg,
    rgba(122, 92, 255, 0.15),
    rgba(157, 118, 255, 0.25)
  );
  opacity: 0;
  transition: opacity 0.4s;
}

.cert-card:hover::before {
  opacity: 1;
}

.cert-card:hover {
  transform: translateY(-8px);
  border-color: #9d76ff;
  box-shadow: 0 8px 30px rgba(157, 118, 255, 0.25);
}

.cert-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 1.2rem;
  transition: transform 0.4s ease;
}

.cert-card:hover img {
  transform: scale(1.05);
}

.cert-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.8rem;
  color: #fff;
}

.cert-card p {
  font-size: 0.95rem;
  opacity: 0.85;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.cert-issuer {
  display: inline-block;
  margin-top: 0.3rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #9d76ff;
  letter-spacing: 0.3px;
}

.cert-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.4s ease;
}

.cert-lightbox.active {
  display: flex;
}

.lightbox-image {
  max-width: 85%;
  max-height: 85%;
  border-radius: 16px;
  box-shadow: 0 0 30px rgba(157, 118, 255, 0.3);
  animation: zoomIn 0.4s ease;
}

.close-lightbox {
  position: absolute;
  top: 25px;
  right: 35px;
  font-size: 2.2rem;
  color: #fff;
  cursor: pointer;
  transition: color 0.3s ease;
}

.close-lightbox:hover {
  color: #9d76ff;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes zoomIn {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@media (max-width: 1200px) {
  .cert-container {
    grid-template-columns: repeat(2, minmax(300px, 1fr));
  }
}

@media (max-width: 768px) {
  .cert-container {
    grid-template-columns: 1fr;
  }

  .cert-card {
    padding: 1.6rem;
  }

  .cert-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(12px);
    justify-content: center;
    align-items: center;
    padding: 1rem;
    z-index: 2000;
  }

  .cert-lightbox.active {
    display: flex;
  }

  .lightbox-image {
    width: auto;
    height: auto;
    max-width: 95vw;
    max-height: 80vh;
    border-radius: 12px;
    margin: auto;
    object-fit: contain;
  }

  .close-lightbox {
    top: 12px;
    right: 18px;
    font-size: 1.8rem;
  }
  .text-header-certs {
    margin: 0;
  }
}

@media (max-width: 480px) {
  .lightbox-image {
    max-width: 90vw;
    max-height: 70vh;
  }

  .close-lightbox {
    top: 10px;
    right: 15px;
    font-size: 1.6rem;
  }

  .cert-card {
    padding: 1.2rem;
  }

  .cert-card img {
    height: 200px;
  }
  .text-header-certs {
    margin: 0;
  }
}