src/pages/not-found.js

import React from 'react';
import { Box, Typography, Button, Container } from '@mui/material';
import { Link } from 'wouter';
import ErrorOutlineIcon from '@mui/icons-material/ErrorOutline';
import HomeIcon from '@mui/icons-material/Home';

export default function NotFound() {
  return (
    <Container maxWidth="md">
      <Box 
        sx={{ 
          display: 'flex', 
          flexDirection: 'column', 
          alignItems: 'center', 
          justifyContent: 'center',
          minHeight: '100vh',
          textAlign: 'center',
          py: 4
        }}
      >
        <ErrorOutlineIcon sx={{ fontSize: 100, color: 'error.main', mb: 2 }} />
        
        <Typography variant="h2" component="h1" gutterBottom>
          Page Not Found
        </Typography>
        
        <Typography variant="h5" color="textSecondary" paragraph>
          The page you're looking for doesn't exist or has been moved.
        </Typography>
        
        <Button 
          component={Link} 
          to="/" 
          variant="contained" 
          color="primary" 
          startIcon={<HomeIcon />}
          sx={{ mt: 3 }}
        >
          Go to Home
        </Button>
      </Box>
    </Container>
  );
}