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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: #000;
    background: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: #fff;
    border-bottom: 1px solid #e5e5e5;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #000;
    text-decoration: none;
    letter-spacing: -0.5px;
}

nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

nav a {
    color: #000;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: #666;
}

.cart-link {
    padding: 8px 20px;
    background: #000;
    color: #fff !important;
    border-radius: 4px;
    cursor: pointer;
}

.cart-link:hover {
    background: #333 !important;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 15px;
    }
    nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Main */
main {
    padding: 40px 0;
}

/* Hero with Image */
.hero-with-image {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 80px 0;
    margin-bottom: 80px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 25px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 18px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.hero-btn {
    display: inline-block;
    padding: 16px 40px;
    background: #000;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
}

.hero-btn:hover {
    background: #333;
    transform: translateY(-2px);
}

.hero-image {
    width: 100%;
    height: 500px;
    background: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e5e5e5;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 968px) {
    .hero-with-image {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 40px 0;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-image {
        height: 350px;
    }
}

/* Sections */
section {
    margin-bottom: 80px;
}

/* About Section */
.about-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    margin-bottom: 25px;
}

.about-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-image {
    width: 100%;
    height: 400px;
    background: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e5e5e5;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 968px) {
    .about-section {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .about-image {
        height: 300px;
    }
}

h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

/* Catalog Header */
.catalog-header {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 50px;
}

.catalog-header-content h2 {
    margin-bottom: 15px;
}

.catalog-intro {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin: 0;
}

.catalog-header-image {
    width: 100%;
    height: 300px;
    background: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e5e5e5;
}

.catalog-header-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 968px) {
    .catalog-header {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .catalog-header-image {
        height: 250px;
    }
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.product-card {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.product-link {
    text-decoration: none;
    color: inherit;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-image {
    width: 100%;
    height: 200px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid #e5e5e5;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #000;
}

.product-description {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.6;
}

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

.product-price {
    font-size: 24px;
    font-weight: 700;
    color: #000;
}

.product-actions {
    padding: 15px 20px;
    border-top: 1px solid #e5e5e5;
}

.add-to-cart-btn {
    width: 100%;
    padding: 12px 20px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.add-to-cart-btn:hover {
    background: #333;
}

/* Payment Grid */
.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.payment-method {
    padding: 30px;
    background: #f9f9f9;
    border-radius: 8px;
    border: 1px solid #e5e5e5;
}

.payment-method h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #000;
}

.payment-method h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #000;
}

.payment-method p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 10px;
}

.payment-method em {
    display: block;
    font-style: normal;
    color: #999;
    font-size: 14px;
    margin-top: 8px;
}

.payment-intro {
    font-size: 16px;
    color: #666;
    margin-bottom: 40px;
    line-height: 1.8;
}

.payment-methods {
    margin-bottom: 60px;
}

.payment-methods h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #000;
}

/* Payment Guide Steps */
.payment-guide {
    margin-bottom: 60px;
}

.payment-guide h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 30px;
    color: #000;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: #f9f9f9;
    border-radius: 8px;
    border-left: 4px solid #000;
}

.step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: #000;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
}

.step-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #000;
}

.step-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

/* Payment Security */
.payment-security {
    background: #f9f9f9;
    padding: 40px;
    border-radius: 8px;
    border: 1px solid #e5e5e5;
}

.payment-security h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 25px;
    color: #000;
}

.payment-security ul {
    list-style: none;
    padding: 0;
}

.payment-security li {
    padding: 15px 0;
    border-bottom: 1px solid #e5e5e5;
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

.payment-security li:last-child {
    border-bottom: none;
}

.payment-security strong {
    color: #000;
    font-weight: 600;
}

/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    right: -400px;
    top: 0;
    width: 400px;
    height: 100vh;
    background: #fff;
    box-shadow: -5px 0 20px rgba(0,0,0,0.1);
    transition: right 0.3s;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

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

.cart-header {
    padding: 20px;
    border-bottom: 1px solid #e5e5e5;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 30px;
    cursor: pointer;
    color: #666;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.cart-item {
    padding: 15px 0;
    border-bottom: 1px solid #e5e5e5;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-item-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
}

.cart-item-price {
    font-size: 18px;
    font-weight: 700;
}

.remove-btn {
    background: #ff4444;
    color: #fff;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.cart-footer {
    padding: 20px;
    border-top: 1px solid #e5e5e5;
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
}

.checkout-btn {
    width: 100%;
    padding: 15px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.checkout-btn:hover {
    background: #333;
}

.empty-cart {
    text-align: center;
    padding: 40px 20px;
    color: #999;
}

/* Footer */
footer {
    background: #f9f9f9;
    border-top: 1px solid #e5e5e5;
    padding: 60px 20px 30px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #000;
}

.footer-section p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #000;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #e5e5e5;
}

.footer-bottom p {
    font-size: 14px;
    color: #999;
    margin: 10px 0;
}

/* Product Page */
.breadcrumb {
    padding: 20px 0;
    font-size: 14px;
    color: #666;
}

.breadcrumb a {
    color: #000;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.product-page {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin: 40px 0 80px;
}

.product-gallery {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.product-main-image {
    width: 100%;
    height: 600px;
    background: #f5f5f5;
    border-radius: 8px;
    border: 1px solid #e5e5e5;
    overflow: hidden;
}

.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-details h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.product-price-large {
    font-size: 48px;
    font-weight: 700;
    color: #000;
    margin-bottom: 30px;
}

.product-description-full {
    margin-bottom: 40px;
}

.product-description-full h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
    margin-top: 30px;
}

.product-description-full h4 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 25px;
    margin-bottom: 12px;
}

.product-description-full p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.product-description-full ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.product-description-full li {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 10px;
}

.add-to-cart-btn-large {
    width: 100%;
    padding: 18px 40px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 20px;
}

.add-to-cart-btn-large:hover {
    background: #333;
}

.back-to-catalog {
    display: inline-block;
    color: #666;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.back-to-catalog:hover {
    color: #000;
}

@media (max-width: 968px) {
    .product-page {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .product-gallery {
        position: static;
    }
    
    .product-main-image {
        height: 400px;
    }
    
    .product-details h1 {
        font-size: 28px;
    }
    
    .product-price-large {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    .cart-sidebar {
        width: 100%;
        right: -100%;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    h2 {
        font-size: 28px;
    }
}