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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #27ae60;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--secondary-color);
}

.language-selector {
    margin-left: 1rem;
}

.language-selector select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background: var(--white);
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
}

.language-selector select:hover {
    border-color: var(--secondary-color);
}


/* Cart Sidebar */
.cart-sidebar {
    position: fixed;
    right: -400px;
    top: 0;
    width: 400px;
    height: 100vh;
    background: var(--white);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 2000;
    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-cart {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-color);
}

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

.cart-empty {
    text-align: center;
    color: #999;
    margin-top: 2rem;
}

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

.cart-subtotal {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-weight: bold;
    font-size: 1.1rem;
}

.checkout-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.checkout-btn:hover:not(:disabled) {
    background: var(--secondary-color);
}

.checkout-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Sale Banner */
.sale-banner {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    text-align: center;
    padding: 0.75rem;
    font-weight: bold;
}

/* Product Section */
.product-section {
    padding: 3rem 0;
    background: var(--white);
}

.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

/* Product Images */
.product-images {
    position: sticky;
    top: 100px;
}

.main-image {
    position: relative;
    width: 100%;
    margin-bottom: 1rem;
    border-radius: 10px;
    overflow: hidden;
}

.main-image img {
    width: 100%;
    height: auto;
    display: block;
}

.prev-btn, .next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.9);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: background 0.3s;
}

.prev-btn {
    left: 10px;
}

.next-btn {
    right: 10px;
}

.prev-btn:hover, .next-btn:hover {
    background: white;
}

.thumbnail-gallery {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 5px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.thumbnail:hover {
    border-color: var(--secondary-color);
}

.thumbnail.active {
    border-color: var(--accent-color);
}

.image-counter {
    text-align: center;
    color: #999;
    font-size: 0.9rem;
}

/* Product Info */
.product-info {
    max-width: 500px;
}

.product-title {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    line-height: 1.3;
}

.benefits-list {
    margin-bottom: 1.5rem;
}

.benefit-item {
    padding: 0.5rem 0;
    font-size: 1rem;
}

.size-chart-btn {
    background: none;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}

.size-chart-btn:hover {
    background: var(--secondary-color);
    color: white;
}

.size-selection {
    margin-bottom: 1.5rem;
}

.size-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.size-options {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.size-option {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: var(--white);
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    min-width: 60px;
    text-align: center;
}

.size-option:hover {
    border-color: var(--secondary-color);
    background: var(--light-bg);
}

.size-option.selected {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.price-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.price {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sale-price {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
}

.regular-price {
    font-size: 1.5rem;
    text-decoration: line-through;
    color: #999;
}

.discount-badge {
    background: var(--success-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
}

.add-to-cart-btn {
    width: 100%;
    padding: 1.25rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    margin-bottom: 1rem;
    transition: background 0.3s;
}

.add-to-cart-btn:hover {
    background: var(--secondary-color);
}

.add-to-cart-btn .btn-added {
    color: var(--success-color);
}

.purchase-info {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: #666;
}

.recurring-notice {
    margin-bottom: 0.5rem;
}

.social-proof {
    color: var(--secondary-color);
    font-weight: 500;
}

.payment-icons {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.payment-icons .icons {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.payment-icons .icons span {
    padding: 0.25rem 0.5rem;
    background: var(--light-bg);
    border-radius: 3px;
    font-size: 0.8rem;
}

.trust-badges {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.badge {
    padding: 0.5rem 1rem;
    background: var(--light-bg);
    border-radius: 20px;
    font-size: 0.9rem;
}

.expert-recommendation {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 10px;
    margin-top: 2rem;
}

.expert-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.expert-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.expert-info h4 {
    margin-bottom: 0.25rem;
}

.expert-info p {
    color: #666;
    font-size: 0.9rem;
}

.expert-text {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Description Section */
.description-section {
    padding: 3rem 0;
    background: var(--light-bg);
}

.description-content {
    max-width: 800px;
    margin: 0 auto;
}

.description-with-image {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 2rem;
}

.description-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
}

.description-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Questions Section */
.questions-section {
    padding: 3rem 0;
    background: var(--white);
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.questions-list {
    max-width: 900px;
    margin: 0 auto 2rem;
}

.question-item {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--light-bg);
    border-radius: 10px;
}

.question-item h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.question-item p {
    line-height: 1.8;
}

.guarantee-badge {
    text-align: center;
    padding: 1.5rem;
    background: var(--success-color);
    color: white;
    border-radius: 10px;
    font-size: 1.1rem;
    max-width: 900px;
    margin: 0 auto;
}

/* Features Banner */
.features-banner {
    padding: 4rem 0;
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    color: white;
}

.banner-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.banner-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.banner-content > p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: rgba(255,255,255,0.1);
    padding: 1.5rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.feature-card p {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Stats Section */
.stats-section {
    padding: 4rem 0;
    background: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 10px;
}

.stat-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.stat-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.stat-card p {
    color: #666;
    line-height: 1.6;
}

/* Benefits Section */
.benefits-section {
    padding: 4rem 0;
    background: var(--light-bg);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.benefit-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.benefit-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.benefit-number {
    color: var(--secondary-color);
    font-weight: bold;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.benefit-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.3rem;
}

.benefit-card p {
    color: #666;
    line-height: 1.6;
}

/* FAQ Section */
.faq-section {
    padding: 4rem 0;
    background: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: var(--light-bg);
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: #e9ecef;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 1.5rem;
    line-height: 1.8;
}

/* Contact Section */
.contact-section {
    padding: 4rem 0;
    background: var(--light-bg);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.contact-form textarea {
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: var(--secondary-color);
}

/* Newsletter Section */
.newsletter-section {
    padding: 3rem 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
}

.newsletter-section h2 {
    margin-bottom: 0.5rem;
}

.newsletter-section p {
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.newsletter-form {
    max-width: 400px;
    margin: 0 auto;
    display: flex;
    gap: 0.5rem;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
}

.newsletter-form button {
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.newsletter-form button:hover {
    background: #c0392b;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
}

.footer-section .payment-icons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.footer-section .payment-icons span {
    padding: 0.25rem 0.5rem;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    font-size: 0.8rem;
}

.footer-links {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    margin-top: 2rem;
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: white;
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.9rem;
}

.footer-column ul li a:hover {
    color: white;
}

.footer-disclaimer {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    margin-top: 2rem;
    font-size: 0.85rem;
    line-height: 1.6;
    color: rgba(255,255,255,0.8);
}

.footer-disclaimer strong {
    color: white;
}

.policy-content {
    background: white;
    color: #333;
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 10px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.policy-content h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.policy-content h3 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.policy-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 3000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close-modal {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-color);
}

.size-chart-table {
    margin-top: 1.5rem;
}

.size-chart-table table {
    width: 100%;
    border-collapse: collapse;
}

.size-chart-table th,
.size-chart-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.size-chart-table th {
    background: var(--light-bg);
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 768px) {
    .product-layout {
        grid-template-columns: 1fr;
    }

    .product-images {
        position: relative;
        top: 0;
    }

    .nav {
        display: none;
    }

    .description-with-image {
        grid-template-columns: 1fr;
    }

    .feature-grid,
    .stats-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

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

    .newsletter-form {
        flex-direction: column;
    }

    .banner-content h2 {
        font-size: 1.8rem;
    }

    .product-title {
        font-size: 1.5rem;
    }

    .sale-price {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .product-section,
    .description-section,
    .questions-section,
    .features-banner,
    .stats-section,
    .benefits-section,
    .faq-section,
    .contact-section {
        padding: 2rem 0;
    }
}