.error-page {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  z-index: 10000;

  display: flex;
  align-items: center;
  justify-content: center;

  color: #fff;
  text-align: center;
}

nav {
  background-color: #f5f7fa !important;
}