Here's the codebase for a loving website I made for my wife. Review it. Explain it. Consider it thoughtfully and perhaps improve it!

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Julia Murphy Tribute</title>
    <style>
        body, html {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            scroll-behavior: smooth;
            background: #1e293b;
            color: #f8fafc;
            overflow-x: hidden;
        }
        header {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(30, 41, 59, 0.95);
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
            z-index: 1000;
        }
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
        }
        nav .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #ff6b6b;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
        }
        nav ul {
            list-style: none;
            display: flex;
            gap: 1.5rem;
        }
        nav ul li a {
            text-decoration: none;
            color: #f8fafc;
            font-weight: 500;
            position: relative;
        }
        nav ul li a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -5px;
            width: 0;
            height: 2px;
            background: #ff6b6b;
            transition: width 0.3s;
        }
        nav ul li a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }
        .hamburger div {
            width: 25px;
            height: 3px;
            background: #f8fafc;
            margin: 4px 0;
            transition: all 0.3s;
        }
        @media (max-width: 600px) {
            nav ul {
                display: none;
                flex-direction: column;
                background: rgba(30, 41, 59, 0.95);
                position: absolute;
                top: 60px;
                right: 20px;
                border-radius: 8px;
                padding: 1rem;
            }
            nav ul.active {
                display: flex;
            }
            .hamburger {
                display: flex;
            }
        }
        section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            padding: 4rem 2rem;
        }
        #home {
            background: url('https://source.unsplash.com/1600x900/?romantic') no-repeat center center/cover;
            flex-direction: column;
            color: #fff;
            text-align: center;
            position: relative;
        }
        #home::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(30,41,59,0.6);
        }
        #home .content {
            position: relative;
            z-index: 1;
        }
        #home h1 {
            font-size: 4rem;
            margin-bottom: 1rem;
            text-shadow: 3px 3px 6px rgba(0,0,0,0.7);
            opacity: 0;
        }
        #home p {
            font-size: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
            opacity: 0;
        }
        .content {
            max-width: 900px;
            margin: 0 auto;
            padding: 2rem;
            text-align: center;
        }
        section h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: #ff6b6b;
            opacity: 0;
        }
        section p {
            font-size: 1.2rem;
            color: #d1d5db;
            opacity: 0;
        }
        #memories .memory, #gallery .photo, #squares .square {
            position: relative;
            overflow: hidden;
            border-radius: 15px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            opacity: 0;
        }
        #memories .memory img, #gallery .photo img, #squares .square img {
            width: 100%;
            height: auto;
            transition: transform 0.5s;
        }
        #memories .memory:hover img, #gallery .photo:hover img, #squares .square:hover img {
            transform: scale(1.05);
        }
        #gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }
        #squares {
            background: #1e293b;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
            padding: 4rem 2rem;
        }
        #squares::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(30,41,59,0.8);
        }
        #squares .content {
            position: relative;
            z-index: 1;
        }
        #squares h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: #ff6b6b;
            opacity: 0;
        }
        #squares p {
            font-size: 1.2rem;
            color: #d1d5db;
            opacity: 0;
            margin-bottom: 2rem;
        }
        #squares .interaction {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            opacity: 0;
        }
        #squares .square {
            width: 100px;
            height: 100px;
            background: #ff6b6b;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: #fff;
            cursor: pointer;
            transition: transform 0.3s, background 0.3s;
            border-radius: 10px;
        }
        #squares .square:hover {
            transform: rotate(20deg) scale(1.1);
            background: #ff4757;
        }
        #graffiti {
            background: url('https://source.unsplash.com/1600x900/?graffiti') no-repeat center center/cover;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            color: #fff;
            text-align: center;
            position: relative;
            padding: 4rem 2rem;
        }
        #graffiti::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(30,41,59,0.6);
        }
        #graffiti .content {
            position: relative;
            z-index: 1;
        }
        #graffiti h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
            opacity: 0;
        }
        #graffiti p {
            font-size: 1.2rem;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
            margin-bottom: 2rem;
            opacity: 0;
        }
        #graffiti .wall {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
            opacity: 0;
        }
        #graffiti .wall img {
            width: 100%;
            height: auto;
            border: 3px solid #ff6b6b;
            transition: transform 0.3s;
            cursor: pointer;
            border-radius: 10px;
        }
        #graffiti .wall img:hover {
            transform: scale(1.1);
        }
        footer {
            background: #1e293b;
            color: #f8fafc;
            text-align: center;
            padding: 1rem;
            position: relative;
            z-index: 1;
        }
        canvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            opacity: 0.3;
        }
    </style>
</head>
<body>
    <header>
        <nav>
            <div class="logo">Julia Murphy Tribute</div>
            <ul>
                <li><a href="#home">Home</a></li>
                <li><a href="#memories">Memories</a></li>
                <li><a href="#gallery">Gallery</a></li>
                <li><a href="#squares">The Squares</a></li>
                <li><a href="#graffiti">Graffiti Wall</a></li>
            </ul>
            <div class="hamburger" aria-label="Toggle navigation" tabindex="0">
                <div></div>
                <div></div>
                <div></div>
            </div>
        </nav>
    </header>
    <canvas id="backgroundCanvas"></canvas>
    <section id="home">
        <div class="content">
            <h1>Happy Anniversary, Julia!</h1>
            <p>Celebrating our love and the beautiful moments we've shared.</p>
        </div>
    </section>
    <section id="memories">
        <div class="content">
            <h2>Our Memories</h2>
            <p>Relive the cherished moments that define our journey together.</p>
            <div style="display:flex;flex-wrap:wrap;gap:1.5rem;margin-top:2rem;justify-content:center">
                <div class="memory" style="width:300px;position:relative">
                    <img src="https://source.unsplash.com/300x200/?couple,love,1" alt="Couple walking hand in hand">
                    <div style="position:absolute;bottom:10px;left:10px;color:#fff;font-size:1rem;text-shadow:1px 1px 3px rgba(0,0,0,0.7)">Our First Date</div>
                </div>
                <div class="memory" style="width:300px;position:relative">
                    <img src="https://source.unsplash.com/300x200/?sunset,love,2" alt="Sunset together on the beach">
                    <div style="position:absolute;bottom:10px;left:10px;color:#fff;font-size:1rem;text-shadow:1px 1px 3px rgba(0,0,0,0.7)">Sunset at the Beach</div>
                </div>
                <div class="memory" style="width:300px;position:relative">
                    <img src="https://source.unsplash.com/300x200/?mountains,love,3" alt="Couple hiking in the mountains">
                    <div style="position:absolute;bottom:10px;left:10px;color:#fff;font-size:1rem;text-shadow:1px 1px 3px rgba(0,0,0,0.7)">Mountain Adventure</div>
                </div>
            </div>
        </div>
    </section>
    <section id="gallery">
        <div class="content">
            <h2>Photo Gallery</h2>
            <div style="display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-top:2rem">
                <div class="photo"><img src="https://source.unsplash.com/400x300/?love,flowers" alt="Blooming flowers symbolizing love"></div>
                <div class="photo"><img src="https://source.unsplash.com/400x300/?romantic,night" alt="Romantic night under the stars"></div>
                <div class="photo"><img src="https://source.unsplash.com/400x300/?couple,dancing" alt="Couple dancing gracefully"></div>
                <div class="photo"><img src="https://source.unsplash.com/400x300/?kissing,love" alt="Intimate kiss between lovers"></div>
                <div class="photo"><img src="https://source.unsplash.com/400x300/?couple,walk" alt="Couple walking in the park"></div>
                <div class="photo"><img src="https://source.unsplash.com/400x300/?couple,coffee" alt="Couple enjoying coffee together"></div>
            </div>
        </div>
    </section>
    <section id="squares">
        <div class="content">
            <h2>The Squares</h2>
            <p>Meet the Squares, our little anxious stick-figure friends who sometimes feel self-conscious. But with a little love and reassurance, they realize they're cherished and loved by everyone around them.</p>
            <div class="interaction">
                <div class="square" tabindex="0" aria-label="Square 1: Always anxious. Press or click to reassure.">🟥</div>
                <div class="square" tabindex="0" aria-label="Square 2: Feels self-conscious. Press or click to encourage.">🟥</div>
                <div class="square" tabindex="0" aria-label="Square 3: Doubts itself. Press or click to remind them they're loved.">🟥</div>
                <div class="square" tabindex="0" aria-label="Square 4: Worried square. Press or click to comfort.">🟥</div>
                <div class="square" tabindex="0" aria-label="Square 5: Shy square. Press or click to uplift.">🟥</div>
            </div>
        </div>
    </section>
    <section id="graffiti">
        <div class="content">
            <h2>Graffiti Wall</h2>
            <p>Julia's passion for graffiti, under the name Blaze, with her crew USK. A tribute to the vibrant art and the creative spirit that lights up the streets.</p>
            <div class="wall">
                <img src="https://source.unsplash.com/300x200/?graffiti,hiphop,1" alt="Blaze's graffiti art">
                <img src="https://source.unsplash.com/300x200/?graffiti,street,2" alt="USK crew tagging the wall">
                <img src="https://source.unsplash.com/300x200/?graffiti,art,3" alt="Colorful street art by Blaze">
                <img src="https://source.unsplash.com/300x200/?graffiti,urban,4" alt="Urban graffiti design">
                <img src="https://source.unsplash.com/300x200/?graffiti,design,5" alt="Creative graffiti mural">
                <img src="https://source.unsplash.com/300x200/?graffiti,abstract,6" alt="Abstract graffiti art">
            </div>
        </div>
    </section>
    <footer>
        <p>&copy; 2024 Julia Murphy Tribute. All rights reserved.</p>
    </footer>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.11.5/gsap.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.11.5/ScrollTrigger.min.js"></script>
    <script>
        // Hamburger Menu Toggle
        const hamburger = document.querySelector('.hamburger');
        const navLinks = document.querySelector('nav ul');
        hamburger.addEventListener('click', () => {
            navLinks.classList.toggle('active');
            hamburger.classList.toggle('active');
        });
        hamburger.addEventListener('keypress', (e) => {
            if (e.key === 'Enter') {
                navLinks.classList.toggle('active');
                hamburger.classList.toggle('active');
            }
        });

        // Initialize Three.js Scene for Background Particles
        const scene = new THREE.Scene();
        const camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);
        const renderer = new THREE.WebGLRenderer({canvas: document.getElementById('backgroundCanvas'), alpha: true});
        renderer.setSize(window.innerWidth, window.innerHeight);
        camera.position.z = 5;

        const geometry = new THREE.BufferGeometry();
        const vertices = [];
        for(let i=0;i<5000;i++) {
            const x = (Math.random() - 0.5) * 200;
            const y = (Math.random() - 0.5) * 200;
            const z = (Math.random() - 0.5) * 200;
            vertices.push(x, y, z);
        }
        geometry.setAttribute('position', new THREE.Float32BufferAttribute(vertices, 3));
        const material = new THREE.PointsMaterial({color: 0xffffff, size:0.5});
        const particles = new THREE.Points(geometry, material);
        scene.add(particles);

        function animateParticles(){
            requestAnimationFrame(animateParticles);
            particles.rotation.y += 0.0005;
            renderer.render(scene, camera);
        }
        animateParticles();

        // GSAP Animations
        gsap.registerPlugin(ScrollTrigger);
        gsap.from("#home h1",{y:50,opacity:0,duration:1,ease:"power2.out",scrollTrigger:{trigger:"#home",start:"top 80%"}});
        gsap.from("#home p",{y:50,opacity:0,duration:1,delay:0.3,ease:"power2.out",scrollTrigger:{trigger:"#home",start:"top 80%"}});
        gsap.from("#memories h2",{y:50,opacity:0,duration:1,scrollTrigger:{trigger:"#memories",start:"top 80%"}});
        gsap.from("#memories p",{y:50,opacity:0,duration:1,delay:0.3,scrollTrigger:{trigger:"#memories",start:"top 80%"}});
        gsap.from("#memories .memory",{scale:0.8,opacity:0,duration:1,stagger:0.2,scrollTrigger:{trigger:"#memories",start:"top 80%"}});
        gsap.from("#gallery h2",{y:50,opacity:0,duration:1,scrollTrigger:{trigger:"#gallery",start:"top 80%"}});
        gsap.from("#gallery p",{y:50,opacity:0,duration:1,delay:0.3,scrollTrigger:{trigger:"#gallery",start:"top 80%"}});
        gsap.from("#gallery .photo",{scale:0.8,opacity:0,duration:1,stagger:0.2,scrollTrigger:{trigger:"#gallery",start:"top 80%"}});
        gsap.from("#squares h2",{y:50,opacity:0,duration:1,scrollTrigger:{trigger:"#squares",start:"top 80%"}});
        gsap.from("#squares p",{y:50,opacity:0,duration:1,delay:0.3,scrollTrigger:{trigger:"#squares",start:"top 80%"}});
        gsap.from("#squares .interaction",{y:50,opacity:0,duration:1,stagger:0.2,scrollTrigger:{trigger:"#squares",start:"top 80%"}});
        gsap.from("#graffiti h2",{y:50,opacity:0,duration:1,scrollTrigger:{trigger:"#graffiti",start:"top 80%"}});
        gsap.from("#graffiti p",{y:50,opacity:0,duration:1,delay:0.3,scrollTrigger:{trigger:"#graffiti",start:"top 80%"}});
        gsap.from("#graffiti .wall",{scale:0.8,opacity:0,duration:1,stagger:0.2,scrollTrigger:{trigger:"#graffiti",start:"top 80%"}});
        
        // Interactive Squares
        const squares = document.querySelectorAll('.square');
        squares.forEach(square=>{
            square.addEventListener('click',()=>{animateSquare(square);});
            square.addEventListener('keypress',(e)=>{if(e.key==='Enter'){animateSquare(square);}});
        });
        function animateSquare(square){
            gsap.to(square,{scale:1.5, background:"#34d399", duration:0.5, yoyo:true, repeat:1, ease:"power1.inOut"});
            gsap.to(square,{rotation:360, duration:1, ease:"power2.out"});
            gsap.to(square,{backgroundColor:"#34d399", duration:0.5, onComplete:()=>{square.style.backgroundColor="#ff6b6b";}});
            setTimeout(()=>{alert("Hey, you're very okay! You're The Squares! You're loved, and nobody is ever mad at you!");},500);
        }

        // Interactive Graffiti Wall - Lightbox Effect
        const graffitiImages = document.querySelectorAll('#graffiti .wall img');
        graffitiImages.forEach(img=>{
            img.addEventListener('click',()=>{openLightbox(img)});
            img.addEventListener('keypress',(e)=>{
                if(e.key==='Enter'){openLightbox(img);}
            });
        });
        function openLightbox(img){
            const overlay = document.createElement('div');
            overlay.style.position='fixed';
            overlay.style.top='0';
            overlay.style.left='0';
            overlay.style.width='100%';
            overlay.style.height='100%';
            overlay.style.background='rgba(0,0,0,0.8)';
            overlay.style.display='flex';
            overlay.style.alignItems='center';
            overlay.style.justifyContent='center';
            overlay.style.cursor='pointer';
            const enlargedImg = document.createElement('img');
            enlargedImg.src = img.src;
            enlargedImg.alt = img.alt;
            enlargedImg.style.maxWidth='90%';
            enlargedImg.style.maxHeight='90%';
            overlay.appendChild(enlargedImg);
            document.body.appendChild(overlay);
            gsap.from(enlargedImg,{scale:0.5, opacity:0, duration:0.5});
            overlay.addEventListener('click',()=>{
                gsap.to(enlargedImg,{scale:0.5, opacity:0, duration:0.3, onComplete:()=>{document.body.removeChild(overlay);}});
            });
        }

        // Responsive Canvas
        window.addEventListener('resize',()=>{
            renderer.setSize(window.innerWidth, window.innerHeight);
            camera.aspect = window.innerWidth / window.innerHeight;
            camera.updateProjectionMatrix();
        });
    </script>
</body>
</html>