/* CSS Variables for Customization */
:root {
    --primary-color: #1db954;
    --accent-color: #2a9d8f;
    --secondary-color: #333;
    --background-color: #0f0f0f;
    --text-color: #e0e0e0;
    --card-bg: rgba(255, 255, 255, 0.1);
    --border-radius: 15px;
    --blur-level: 20px;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --highlight: #1ed760;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
}

/* Background with Animated Gradient */
body {
    background: linear-gradient(135deg, #121212, #1a1a1a, #0f0f0f);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    animation: gradientAnimation 10s ease-in-out infinite;
}

@keyframes gradientAnimation {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Header */
header {
    background: var(--secondary-color);
    color: var(--text-color);
    width: 100%;
    padding: 20px;
    text-align: center;
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: background 0.3s ease;
}

header h1 {
    font-size: 2.8em;
    font-weight: 800;
    background: linear-gradient(45deg, #1ed760, #1db954);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text; /* optional, adds cross-browser support */
    display: inline-block; /* important to make gradient clipping work */
    color: var(--primary-color); /* fallback color if gradient fails */
}


/* Navigation Menu */
ul {
    display: flex;
    justify-content: center;
    list-style: none;
    background: var(--secondary-color);
    width: 100%;
    padding: 10px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

ul li {
    margin: 0 15px;
}

ul a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.2em;
    padding: 8px 15px;
    border-radius: var(--border-radius);
    transition: background 0.3s, transform 0.3s ease-in-out;
}

ul a:hover {
    background: var(--highlight);
    color: #fff;
    transform: translateY(-3px) scale(1.1);
}

/* Main Layout */
main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    padding: 40px 20px;
    gap: 30px;
    max-width: 1200px;
    width: 100%;
}

/* Product and Cart Sections */
.products, .cart {
    flex: 1;
    min-width: 300px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-level));
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    transform-style: preserve-3d;
}

.products:hover, .cart:hover {
    transform: rotateX(5deg) rotateY(-5deg);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.5);
}

.products h2, .cart h2 {
    font-size: 1.8em;
    color: var(--highlight);
    text-align: center;
    margin-bottom: 20px;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

/* Product List */
.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 25px;
}

.product {
    background: var(--glass-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.5);
}

.product img {
    width: 100%;
    max-width: 150px;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    transition: transform 0.3s;
}

.product img:hover {
    transform: scale(1.2) rotate(5deg);
}

.product h3 {
    font-size: 1.3em;
    color: var(--text-color);
    margin-bottom: 8px;
}

.product p {
    font-size: 1.1em;
    color: #cccccc;
}

/* Button Styling */
button {
    background: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1em;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: pulse 1.5s infinite alternate;
}

button:hover {
    background: #1ed760;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

button:active {
    transform: translateY(2px);
    box-shadow: 0 3px 7px rgba(0, 0, 0, 0.2);
}

@keyframes pulse {
    from { transform: scale(1); }
    to { transform: scale(1.05); }
}

/* Shopping Cart */
.cart ul {
    list-style-type: none;
    width: 100%;
    padding: 0;
    margin-bottom: 20px;
}

.cart li {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    font-size: 1em;
    color: var(--text-color);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.cart li:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

#total {
    font-size: 1.3em;
    font-weight: bold;
    color: var(--highlight);
    margin-top: 15px;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    main {
        flex-direction: column;
        align-items: center;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    ul a {
        font-size: 1em;
    }
}