.page-inner.error404 {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  background: #fafafa;
  color: #333;
  text-align: center;
}

.page-inner.error404 h1 {
  font-size: 4rem;
  margin-bottom: 0.5rem;
}

.page-inner.error404 h2 {
  font-size: 2rem;
  color: #666;
}