/* Core Variables */
:root {
    --glass-blue: rgba(173, 216, 230, 0.7); /* Light blue for header/footer */
    --glass-border: rgba(255, 255, 255, 0.4);
    --body-white: #ffffff;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--body-white); /* Body is white as requested */
    color: #333;
    overflow-x: hidden;
}

/* 3D Container Setup */
.marketplace-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 100px 5%;
    perspective: 1000px; /* Essential for 3D rotation */
}

/* Header & Footer Glassmorphism */
.shop-header, .shop-footer {
    background: var(--glass-blue);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    padding: 15px 5%;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.shop-footer {
    position: relative;
    justify-content: center;
    margin-top: 50px;
}

/* Logo Styling */
.logo {
    height: 60px;
    margin-right: 20px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

/* 3D Product Cards */
.product-card {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: box-shadow 0.3s ease;
    transform-style: preserve-3d; /* Allows internal elements to float in 3D */
}

.product-card:hover {
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.product-card img {
    width: 100%;
    border-radius: 15px;
    transform: translateZ(30px); /* Makes the image "pop" out of the card */
    margin-bottom: 15px;
}

.product-card h3 {
    margin: 10px 0;
    transform: translateZ(20px);
}

.product-card button {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    transform: translateZ(10px);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .marketplace-grid {
        grid-template-columns: 1fr;
        padding: 40px 20px;
    }
    
    .logo {
        height: 45px;
    }
    
    h1 {
        font-size: 1.2rem;
    }
}