:root { --dark: #111; --red: #e03131; --gray: #f4f4f4; }
        body { font-family: sans-serif; margin: 0; line-height: 1.6; color: var(--dark); scroll-behavior: smooth; }
        
        /* 1. NAV BAR */
        nav { display: flex; justify-content: space-between; align-items: center; padding: 15px 5%; background: white; border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 100; }
        .nav-links span { margin: 0 15px; cursor: pointer; font-weight: bold; text-transform: uppercase; font-size: 14px; }
        .nav-links span:hover { color: var(--red); }

        /* 2. HERO HEADER */
        header { background: var(--dark); color: white; padding: 80px 20px; text-align: center; }
        header h1 { font-size: 3rem; margin: 0; }

        /* 3. PRODUCT GRID */
        .container { max-width: 1100px; margin: auto; padding: 40px 20px; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .card { border: 1px solid #eee; padding: 15px; border-radius: 15px; text-align: center; cursor: pointer; transition: 0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }
        .card img { width: 100%; height: 250px; object-fit: cover; border-radius: 10px; }
        .price { color: var(--red); font-weight: bold; font-size: 1.2rem; }

        /* 4. PRODUCT DETAILS OVERLAY */
        #detail-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); display: none; justify-content: center; align-items: center; z-index: 1000; }
        .detail-box { background: white; padding: 30px; border-radius: 20px; max-width: 450px; width: 90%; position: relative; text-align: center; }
        .close-btn { position: absolute; top: 10px; right: 20px; font-size: 30px; cursor: pointer; color: #999; }

        /* 5. FOOTER */
        footer { background: var(--dark); color: #888; padding: 50px 5% 20px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; margin-bottom: 30px; }
        .footer-grid h3 { color: white; margin-bottom: 15px; }
        .footer-grid p, .footer-grid a { color: #888; text-decoration: none; font-size: 14px; display: block; margin-bottom: 10px; }
        .copy { text-align: center; border-top: 1px solid #333; padding-top: 20px; font-size: 12px; }

        .btn { background: var(--dark); color: white; border: none; padding: 12px 25px; cursor: pointer; border-radius: 5px; font-weight: bold; width: 100%; margin-top: 15px; }