:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --accent-orange: #ff7a00;
    --accent-green: #39ff14;
    --border-color: #333;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 3D Print Bed Background */
.print-bed-bg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent-orange);
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin: 0 1rem;
    font-weight: 600;
    transition: var(--transition);
}

nav a:hover {
    color: var(--accent-orange);
}

.cart-btn {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

#cart-count {
    background: var(--accent-orange);
    color: #000;
    padding: 0.1rem 0.4rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 800;
}

/* Hero Section */
.hero {
    padding: 8rem 5%;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-orange);
    color: #000;
    box-shadow: 0 4px 15px rgba(255, 122, 0, 0.3);
}

.btn-primary:hover {
    background: #e66e00;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 122, 0, 0.4);
}

.btn-secondary {
    background: var(--text-main);
    color: var(--bg-color);
}

.btn-secondary:hover {
    background: #d4d4d8;
}

/* Shop Section */
.shop-section {
    padding: 4rem 5%;
}

.shop-section h2, .custom-section h2 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 800;
}

.filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.filter-btn.active, .filter-btn:hover {
    background: var(--card-bg);
    border-color: var(--accent-orange);
    color: var(--accent-orange);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-orange);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.product-img {
    height: 250px;
    background: radial-gradient(circle at center, #2e2e2e 0%, #1a1a1a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-img img {
    width: calc(100% - 3rem);
    height: calc(100% - 3rem);
    object-fit: contain;
    transition: all 0.4s ease;
    filter: drop-shadow(0 15px 25px rgba(0,0,0,0.5));
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
}

.product-img .img-hover {
    opacity: 0;
}

.product-card:hover .product-img .img-main {
    opacity: 0;
}

.product-card:hover .product-img .img-main:only-of-type {
    opacity: 1;
}

.product-card:hover .product-img .img-hover {
    opacity: 1;
}

.product-card:hover .product-img img {
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(0,0,0,0.8);
    border: 1px solid var(--accent-orange);
    color: var(--accent-orange);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    z-index: 2;
}

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

.product-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.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;
}

.product-price {
    font-size: 1.3rem;
    font-weight: 800;
}

.add-to-cart {
    background: transparent;
    border: 1px solid var(--accent-orange);
    color: var(--accent-orange);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.5rem;
}

.add-to-cart:hover {
    background: var(--accent-orange);
    color: #000;
}

/* Custom Section */
.custom-section {
    padding: 4rem 5%;
    display: flex;
    justify-content: center;
}

.configurator-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 3rem;
    border-radius: 16px;
    width: 100%;
    max-width: 600px;
}

.configurator-card p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

input, select {
    width: 100%;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent-orange);
    box-shadow: 0 0 0 2px rgba(255, 122, 0, 0.2);
}

.price-preview {
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    margin: 2rem 0;
    color: var(--accent-orange);
}

#custom-form .btn {
    width: 100%;
}

/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: var(--card-bg);
    border-left: 1px solid var(--border-color);
    z-index: 1000;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.cart-sidebar.open {
    right: 0;
}

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

.close-btn {
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

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

.cart-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.cart-item-img {
    width: 70px;
    height: 70px;
    background: var(--bg-color);
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

.cart-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.cart-item-title {
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.cart-item-price {
    color: var(--accent-orange);
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.qty-btn {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.qty-btn:hover {
    border-color: var(--accent-orange);
    color: var(--accent-orange);
}

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

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.checkout-btn {
    width: 100%;
}

.cart-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(3px);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cart-overlay.show {
    display: block;
    opacity: 1;
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: 3rem 5%;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-brand {
    font-weight: 800;
    font-size: 1.2rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-main);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero { padding: 4rem 5%; }
    .hero h1 { font-size: 2.2rem; }
    .form-row { grid-template-columns: 1fr; }
    header { flex-wrap: wrap; gap: 1rem; justify-content: center; }
    .logo { width: 100%; text-align: center; }
    nav { order: 3; width: 100%; display: flex; justify-content: center; margin-top: 0.5rem; }
    .cart-btn { position: absolute; right: 5%; top: 1.5rem; }
    .footer-content { flex-direction: column; text-align: center; }
    .footer-links a { margin: 0 0.5rem; }
    .configurator-card { padding: 1.5rem; }
}