:root {
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --border-color: #e5e5e5;
    --accent-color: #000000;
    --accent-hover: #333333;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition: all 0.2s ease-in-out;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body.cart-open {
    overflow: hidden;
}

body.payment-processing-open {
    overflow: hidden;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
}

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

.cart-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    position: relative;
}

.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: #ff3b30;
    color: white;
    font-size: 0.75rem;
    font-weight: bold;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    padding: 5rem 5%;
    background-color: #fbfbfd;
    min-height: 80vh;
}

.hero-content {
    flex: 1;
    padding-right: 2rem;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    line-height: 1.1;
    letter-spacing: -1.5px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 450px;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--accent-color);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
}

.cta-button:hover {
    background-color: var(--accent-hover);
}

.hero-image-container {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-image {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

/* Models Section */
.models-section {
    padding: 6rem 5%;
    background-color: #ffffff;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    letter-spacing: -0.5px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.product-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.06);
    transform: translateY(-5px);
}

.product-image-wrapper {
    height: 240px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image {
    max-height: 100%;
    object-fit: contain;
}

.product-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
    letter-spacing: -0.5px;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    min-height: 45px;
}

.price {
    font-size: 1.4rem;
    font-weight: 600;
    display: block;
    margin-bottom: 1.5rem;
}

.buy-button {
    padding: 0.8rem 2rem;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.95rem;
    pointer-events: none; /* Let card handle the click */
}

.product-card:hover .buy-button {
    border-color: var(--accent-color);
}

.info-section,
.faq-section {
    padding: 5rem 5%;
    background: #fbfbfd;
}

.faq-section {
    background: #fff;
}

.info-header {
    max-width: 760px;
    margin: 0 auto 3rem;
    text-align: center;
}

.info-header h2 {
    font-size: 2.5rem;
    line-height: 1.15;
    margin-bottom: 1rem;
}

.info-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    max-width: 1100px;
    margin: 0 auto;
}

.info-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

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

.info-card p {
    color: var(--text-secondary);
}

.faq-list {
    display: grid;
    gap: 0.75rem;
    max-width: 860px;
    margin: 0 auto;
}

.faq-list details {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fff;
    padding: 1rem 1.25rem;
}

.faq-list summary {
    cursor: pointer;
    font-weight: 700;
}

.faq-list p {
    color: var(--text-secondary);
    margin-top: 0.75rem;
}

/* Cart Panel */
.cart-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.cart-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    height: 100dvh;
    background: #fff;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    transition: right 0.3s ease-in-out;
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
}

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

.cart-header {
    position: sticky;
    top: 0;
    z-index: 1;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-cart {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

.cart-items {
    flex: 1 0 auto;
    overflow: visible;
    padding: 1.5rem;
}

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

.cart-item img {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

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

.cart-item-info h4 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.cart-item-price {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cart-item-controls button {
    width: 25px;
    height: 25px;
    border: 1px solid var(--border-color);
    background: #fff;
    cursor: pointer;
    border-radius: 4px;
}

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

.cart-footer {
    flex: 0 0 auto;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    background: #fbfbfd;
}

.checkout-contact {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.checkout-contact h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.checkout-contact label {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.checkout-contact input,
.checkout-contact textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.65rem 0.75rem;
    color: var(--text-primary);
    background: #fff;
    font: inherit;
}

.checkout-contact textarea {
    resize: vertical;
    min-height: 84px;
}

.checkout-contact .field-error {
    border-color: #c62828;
}

.checkout-status {
    min-height: 1.2rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.checkout-status.success {
    color: #18794e;
}

.checkout-status.error {
    color: #c62828;
}

.payment-processing-overlay {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.94);
}

.payment-processing-overlay.active {
    display: flex;
}

.payment-processing-panel {
    width: min(100%, 420px);
    text-align: center;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 18px 50px rgba(0,0,0,0.12);
}

.payment-spinner {
    width: 54px;
    height: 54px;
    margin: 0 auto 1.25rem;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: payment-spin 0.85s linear infinite;
}

.payment-processing-panel h2 {
    font-size: 1.7rem;
    line-height: 1.2;
    margin-bottom: 0.75rem;
}

.payment-processing-panel p {
    color: var(--text-secondary);
}

@keyframes payment-spin {
    to {
        transform: rotate(360deg);
    }
}

.cart-line {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.cart-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.paypal-button-container {
    margin-bottom: 1rem;
    min-height: 45px;
}

.checkout-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.checkout-btn:hover {
    background: var(--accent-hover);
}

/* Product Page layout */
.product-page {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    gap: 4rem;
}

.product-gallery {
    flex: 1;
    background: #fbfbfd;
    border-radius: 16px;
    padding: 3rem;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.product-gallery img {
    max-width: 100%;
    max-height: clamp(320px, 38vw, 520px);
    height: auto;
    object-fit: contain;
}

.product-details {
    flex: 1;
}

.product-details h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.product-details .price {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.add-to-cart-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 2rem;
    transition: var(--transition);
}

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

.product-purchase-summary {
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-bottom: 1.5rem;
}

.purchase-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.purchase-row strong {
    color: var(--text-primary);
}

.purchase-total {
    color: var(--text-primary);
    font-weight: 700;
    margin-top: 0.75rem;
    margin-bottom: 0.75rem;
}

.product-purchase-summary a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-description {
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.specs-list {
    margin-bottom: 2rem;
}

.specs-list h3 {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.spec-grid-large {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.safety-warning {
    padding: 1.5rem;
    background-color: #fbfbfd;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.safety-warning strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.5rem;
}

.success-page {
    min-height: calc(100vh - 86px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 5%;
    background: #fbfbfd;
}

.success-panel {
    width: min(100%, 680px);
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.success-panel h1 {
    font-size: 2.25rem;
    line-height: 1.15;
    margin-bottom: 0.75rem;
}

.success-panel p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.success-summary {
    display: grid;
    gap: 0.75rem;
    margin: 1.5rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.success-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-secondary);
}

.success-row strong {
    color: var(--text-primary);
    text-align: right;
}

.success-items {
    list-style: none;
    display: grid;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.success-items li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--text-secondary);
}

.success-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.success-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    border: 1px solid var(--accent-color);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 700;
}

.success-actions a.primary {
    background: var(--accent-color);
    color: #fff;
}

.legal-page {
    padding: 4rem 5%;
    background: #fbfbfd;
}

.legal-content {
    max-width: 860px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.legal-kicker {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.legal-content h1 {
    font-size: 2.5rem;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.legal-content section {
    border-top: 1px solid var(--border-color);
    padding-top: 1.25rem;
    margin-top: 1.25rem;
}

.legal-content h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.legal-content p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

/* Footer */
.site-footer {
    padding: 3rem 5%;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    background-color: #fbfbfd;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.site-footer h3,
.site-footer h4 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.site-footer a {
    display: block;
    width: fit-content;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.35rem;
}

.site-footer a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    max-width: 1100px;
    margin: 2rem auto 0;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .product-page {
        flex-direction: column;
        padding: 2rem 5%;
    }
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 6rem;
    }
    .hero-content {
        padding-right: 0;
        margin-bottom: 3rem;
    }
    .hero h1 {
        font-size: 3rem;
    }
    .nav-links {
        display: none;
    }
    .spec-grid-large {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .legal-content {
        padding: 1.5rem;
    }
}