/* Base Styles & Variables */
:root {
    --bg-color: #0b0f19;
    --text-main: #f0f4f8;
    --text-muted: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --card-bg: rgba(30, 41, 59, 0.4);
    --card-border: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --danger: #ef4444;
    --success: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(139, 92, 246, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(6, 182, 212, 0.15), transparent 25%);
    background-attachment: fixed;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header & Navigation */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Share Tech Mono', monospace;
    background: linear-gradient(to right, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.cart-btn {
    background: transparent;
    color: var(--text-main);
    font-size: 1.2rem;
    position: relative;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.cart-btn:hover {
    color: var(--accent-cyan);
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -8px;
    background: var(--accent-purple);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 50%;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Products Grid */
.products-section {
    padding: 3rem 0 6rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    overflow: hidden;
    backdrop-filter: blur(8px);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-purple);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15);
}

.product-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 1px solid var(--card-border);
}

.product-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.product-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.product-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.btn-add {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: opacity 0.3s ease;
}

.btn-add:hover {
    opacity: 0.9;
}

/* Cart Drawer */
.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.cart-overlay.active {
    opacity: 1;
    visibility: visible;
}

.cart-drawer {
    position: fixed;
    top: 0;
    right: -450px;
    width: 100%;
    max-width: 400px;
    height: 100%;
    background: var(--bg-color);
    border-left: 1px solid var(--card-border);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
}

.cart-drawer.active {
    right: 0;
}

.cart-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-header h2 {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.close-cart {
    background: transparent;
    color: var(--text-muted);
    font-size: 1.2rem;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.close-cart:hover {
    color: var(--text-main);
}

.cart-items {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cart-item {
    display: flex;
    gap: 1rem;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
}

.cart-item-img {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
}

.cart-item-info {
    flex-grow: 1;
}

.cart-item-title {
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.cart-item-price {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
}

.cart-item-remove {
    background: transparent;
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.cart-empty {
    text-align: center;
    color: var(--text-muted);
    margin-top: 2rem;
}

.cart-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--card-border);
    background: var(--glass-bg);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.btn-checkout {
    width: 100%;
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: opacity 0.3s ease;
}

.btn-checkout:hover {
    opacity: 0.9;
}
.btn-checkout:disabled {
    background: var(--card-border);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Checkout Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.checkout-modal {
    background: var(--bg-color);
    border: 1px solid var(--accent-purple);
    border-radius: 16px;
    padding: 2.5rem;
    width: 90%;
    max-width: 500px;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 20px 40px rgba(0,0,0,0.6), 0 0 40px rgba(139, 92, 246, 0.2);
    position: relative;
}

.modal-overlay.active .checkout-modal {
    transform: scale(1);
}

.checkout-modal h2 {
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.checkout-success {
    display: none;
    text-align: center;
}

.checkout-success i {
    font-size: 4rem;
    color: var(--success);
    margin-bottom: 1rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--card-border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1rem; padding: 0 1rem; }
    .products-grid { grid-template-columns: 1fr; }
}