/* Certificates – unified with site theme */

.page-header {
  background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 60%, #ffffff 100%);
  color: #0f172a;
  padding: 70px 0 55px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid #e2e8f0;
}

.page-header::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.08);
  top: -150px;
  inset-inline-end: -80px;
}

.page-header h1 {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 10px;
  position: relative;
  color: #0f172a;
}

.page-header p {
  font-size: 1.1rem;
  position: relative;
  color: #334155;
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.certificate-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.certificate-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.certificate-image {
  width: 100%;
  height: 210px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 3.2rem;
  position: relative;
  overflow: hidden;
}

.certificate-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.certificate-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.certificate-body h3 {
  font-size: 1.1rem;
  color: #0f172a;
  margin-bottom: 8px;
  font-weight: 700;
}

.certificate-issuer {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.certificate-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.85rem;
  color: #334155;
  margin-bottom: 12px;
}

.certificate-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.certificate-desc {
  color: #334155;
  font-size: 0.9rem;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.certificate-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.badge-expired {
  position: absolute;
  top: 12px;
  inset-inline-end: 12px;
  background: var(--danger);
  color: white;
  font-size: 0.72rem;
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 700;
}

.badge-valid {
  position: absolute;
  top: 12px;
  inset-inline-end: 12px;
  background: var(--success);
  color: white;
  font-size: 0.72rem;
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 700;
}

@media (max-width: 768px) {
  .page-header h1 { font-size: 1.7rem; }
  .certificates-grid { grid-template-columns: 1fr; }
}