* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  color: #333;
}
.error-container {
  text-align: center;
  padding: 40px 20px;
}
.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #ddd;
  margin-bottom: 16px;
}
.error-message {
  font-size: 18px;
  color: #666;
  margin-bottom: 24px;
}
.error-link {
  display: inline-block;
  padding: 12px 24px;
  background: #4a90d9;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-size: 14px;
}
.error-link:hover {
  background: #357abd;
}