You are a senior front-end developer and UI/UX designer specializing in e-commerce experiences. Create a **production-ready, responsive mystery-box marketplace website** that combines modern design aesthetics with optimal user experience.
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| class CustomFooter extends HTMLElement { | |
| connectedCallback() { | |
| this.attachShadow({ mode: 'open' }); | |
| this.shadowRoot.innerHTML = ` | |
| <style> | |
| :host { | |
| display: block; | |
| width: 100%; | |
| } | |
| .footer-container { | |
| background: #1E293B; | |
| color: white; | |
| } | |
| .footer-link { | |
| transition: color 0.3s ease; | |
| } | |
| .footer-link:hover { | |
| color: #0D9488; | |
| } | |
| .social-icon { | |
| transition: all 0.3s ease; | |
| } | |
| .social-icon:hover { | |
| color: #0D9488; | |
| transform: translateY(-2px); | |
| } | |
| </style> | |
| <footer class="footer-container"> | |
| <div class="container mx-auto px-4 py-12"> | |
| <div class="grid grid-cols-1 md |