import React, { useState, useEffect } from 'react';
import { useMediaQuery } from 'react-responsive';

const MobileResponsiveDesign = () => {
  const [isMenuOpen, setIsMenuOpen] = useState(false);
  const [formData, setFormData] = useState({
    name: '',
    email: '',
    password: '',
  });
  const isMobile = useMediaQuery({ query: '(max-width: 768px)' });

  useEffect(() => {
    if (isMobile) {
      // adjust website to fit screen size
    }
  }, [isMobile]);

  const handleMenuClick = () => {
    setIsMenuOpen(!isMenuOpen);
  };

  const handleFormChange = (e) => {
    setFormData({
      ...formData,
      [e.target.name]: e.target.value,
    });
  };

  const handleFormSubmit = (e) => {
    e.preventDefault();
    // submit form
  };

  return (
    <div>
      <nav>
        <button onClick={handleMenuClick}>Menu</button>
        {isMenuOpen && (
          <ul>
            <li>Option 1</li>
            <li>Option 2</li>
            <li>Option 3</li>
          </ul>
        )}
      </nav>
      <main>
        <h1>Website Content</h1>
        <p>Content goes here</p>
        <form onSubmit={handleFormSubmit}>
          <label htmlFor="name">Name:</label>
          <input
            type="text"
            id="name"
            name="name"
            value={formData.name}
            onChange={handleFormChange}
          />
          <label htmlFor="email">Email:</label>
          <input
            type="email"
            id="email"
            name="email"
            value={formData.email}
            onChange={handleFormChange}
          />
          <label htmlFor="password">Password:</label>
          <input
            type="password"
            id="password"
            name="password"
            value={formData.password}
            onChange={handleFormChange}
          />
          <button type="submit">Submit</button>
        </form>
      </main>
    </div>
  );
};

export default MobileResponsiveDesign;
```