body {
  background-color: #f8f9fa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  text-align: center;
}
.error-code {
  font-size: 120px;
  font-weight: bold;
  color: #ff6b6b;
}
.error-message {
  font-size: 24px;
  color: #343a40;
}