components/parallax-section.js

class ParallaxSection extends HTMLElement {
  connectedCallback() {
    this.attachShadow({ mode: 'open' });
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          display: block;
          position: relative;
          height: 100vh;
          overflow: hidden;
          perspective: 1000px;
        }
        .parallax-container {
          position: absolute;
          top: 0;
          left: 0;
          right: 0;
          bottom: 0;
          transform-style: preserve-3d;
        }
        .parallax-layer {
          position: absolute;
          inset: 0;
          background-size: cover;
          background-position: center;
          will-change: transform;
        }
        .content-layer {
          position: relative;
          z-index: 10;
          height: 100%;
          display: flex;
          align-items: center;
          justify-content: center;
        }
      </style>
      <div class="parallax-container">
        <div class="parallax-layer layer-1"></div>
        <div class="parallax-layer layer-2"></div>
        <div class="parallax-layer layer-3"></div>
        <div class="content-layer">
          <slot></slot>
        </div>
      </div>
    `;

    this.layers = [
      this.shadowRoot.querySelector('.layer-1'),
      this.shadowRoot.querySelector('.layer-2'),
      this.shadowRoot.querySelector('.layer-3')
    ];

    // Set background images from attributes
    if (this.hasAttribute('layer1')) {
      this.layers[0].style.backgroundImage = `url('${this.getAttribute('layer1')}')`;
    }
    if (this.hasAttribute('layer2')) {
      this.layers[1].style.backgroundImage = `url('${this.getAttribute('layer2')}')`;
    }
    if (this.hasAttribute('layer3')) {
      this.layers[2].style.backgroundImage = `url('${this.getAttribute('layer3')}')`;
    }

    // Parallax effect
    window.addEventListener('scroll', () => {
      const scrollY = window.scrollY;
      const rect = this.getBoundingClientRect();
      const offsetTop = rect.top + window.scrollY;
      const viewportHeight = window.innerHeight;
      
      // Only animate when section is in view
      if (scrollY + viewportHeight > offsetTop && scrollY < offsetTop + rect.height) {
        const progress = (scrollY - offsetTop + viewportHeight) / (viewportHeight + rect.height);
        
        this.layers.forEach((layer, index) => {
          const depth = (index + 1) * 0.2;
          const translateY = progress * 100 * depth;
          layer.style.transform = `translate3d(0, ${translateY}px, 0)`;
        });
      }
    });
  }
}

customElements.define('parallax-section', ParallaxSection);