/* CERTIFICADOS */
.certificados {
  background: var(--bg-claro, #fbfafa);
  padding: 70px 80px 80px;
  margin-top: 2.5rem;
}

.certificados-header {
  margin-bottom: 48px;
}

.certificados-header h2 {
  color: var(--verde, #00684a);
  font-size: 34px;
  font-weight: 900;
  position: relative;
  display: inline-block;
}

.certificados-header h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--verde-claro, #86deab);
  border-radius: 2px;
  margin-top: 10px;
}

.certificados-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
}

/* Tarjeta como enlace */
a.cert-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 1px solid rgba(0, 104, 74, 0.12);
  border-radius: 14px;
  overflow: hidden;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s;
}

a.cert-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(0, 104, 74, 0.15);
  border-color: rgba(0, 104, 74, 0.35);
}

/* Preview imagen */
.cert-preview {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #f0f7f4;
}

.cert-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition:
    transform 0.35s ease,
    filter 0.35s ease;
}

.cert-card {
  cursor: pointer;
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Preview del PDF */
.cert-pdf-preview {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: #f4f7f4;
  border-bottom: 1px solid rgba(0, 104, 74, 0.1);
}

.cert-pdf-preview iframe {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
  transform: scale(1);
  transform-origin: top left;
}

/* Overlay con botón al hacer hover */
.cert-pdf-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 30, 43, 0.55);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.cert-card:hover .cert-pdf-overlay {
  opacity: 1;
}

.cert-pdf-overlay svg {
  width: 28px;
  height: 28px;
  stroke: #fff;
}

.cert-pdf-overlay span {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
}

/* Cuerpo de la tarjeta */
.cert-body {
  padding: 20px 20px 20px 24px;
  position: relative;
  flex: 1;
}

/* Badge reposicionado dentro del body */
.cert-body .cert-badge {
  position: static;
  display: inline-block;
  margin-bottom: 10px;
}

.cert-body .cert-title {
  margin-bottom: 4px;
}

/* Overlay "Ver certificado" */
.cert-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.cert-overlay svg {
  width: 28px;
  height: 28px;
  stroke: #fff;
}

a.cert-card:hover .cert-overlay {
  opacity: 1;
}

/* Info inferior */
.cert-info {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid rgba(0, 104, 74, 0.08);
}

.cert-badge {
  display: inline-block;
  background: rgba(0, 104, 74, 0.1);
  color: var(--verde, #00684a);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  font-family: "Urbanist", sans-serif;
  width: fit-content;
}

.cert-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--texto, #212529);
  line-height: 1.3;
}

.cert-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 2px;
}

.cert-issuer {
  font-size: 13px;
  color: var(--verde, #00684a);
  font-weight: 600;
}

.cert-year {
  font-size: 12px;
  color: #888;
  font-family: "Urbanist", sans-serif;
  letter-spacing: 0.04em;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .certificados {
    padding: 60px 40px 70px;
  }
  .certificados-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .certificados {
    padding: 48px 22px 56px;
  }
  .certificados-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .certificados-header h2 {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .certificados {
    padding: 36px 16px 44px;
  }
}