/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

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

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

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

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

.language-select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-white);
    cursor: pointer;
    font-weight: 500;
}

.cart-icon {
    position: relative;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

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

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.hero-image::after {
    content: 'Synergy Core';
    position: absolute;
    bottom: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.85);
    color: #333;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    z-index: 10;
    backdrop-filter: blur(5px);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
}

/* Health Data Section */
.health-data {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-top: 1rem;
}

.health-grid {
    display: grid;
    gap: 3rem;
    margin-bottom: 4rem;
}

.health-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    background: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.health-card:nth-child(even) {
    direction: rtl;
}

.health-card:nth-child(even) > * {
    direction: ltr;
}

.health-card {
    position: relative;
}

.health-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.health-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.health-image-wrapper::after {
    content: 'Synergy Core';
    position: absolute;
    bottom: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.85);
    color: #333;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    z-index: 10;
    backdrop-filter: blur(5px);
}

.health-card-content {
    padding: 3rem;
}

.health-card-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.health-card-content p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.health-list {
    list-style: none;
}

.health-list li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    font-weight: 500;
}

.metrics-showcase {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
}

.metrics-showcase h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
}

.metrics-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.metric-tag {
    background: var(--bg-white);
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s;
}

.metric-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* AI Insights Section */
.ai-insights {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
    position: relative;
    overflow: hidden;
}

.ai-insights::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
}

.ai-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.ai-text .section-title {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.ai-text .section-subtitle {
    color: var(--text-light);
    margin-bottom: 0;
}

.ai-features {
    margin-top: 2rem;
}

.ai-feature {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    align-items: flex-start;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
}

.ai-feature:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.ai-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    filter: brightness(1.1);
}

.ai-feature h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.ai-feature p {
    color: var(--text-light);
    line-height: 1.6;
}

.ai-visual {
    position: relative;
}

.ai-visual img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.ai-visual::after {
    content: 'Synergy Core';
    position: absolute;
    bottom: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.85);
    color: #333;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    z-index: 10;
    backdrop-filter: blur(5px);
}

/* Shop Section */
.shop {
    padding: 5rem 0;
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.product-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 20;
}

.product-card {
    position: relative;
}

.product-image-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
    max-width: 250px;
    margin-bottom: 1.5rem;
}

.product-card img {
    width: 100%;
    max-width: 250px;
    height: 250px;
    object-fit: cover;
    border-radius: 12px;
    display: block;
}


.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.product-desc {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.product-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.price-unit {
    font-size: 1.5rem;
}

.product-card .btn {
    width: 100%;
}

/* App Download Section */
.app-download {
    padding: 5rem 0;
}

.app-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.app-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.app-text p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.app-features-list {
    margin-bottom: 2rem;
}

.app-feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.app-feature-item span:first-child {
    color: var(--success-color);
    font-weight: 700;
    font-size: 1.5rem;
}

.app-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.app-btn {
    display: inline-block;
}

.app-store-badge,
.play-store-badge {
    height: 60px;
    transition: transform 0.3s;
}

.app-btn:hover .app-store-badge,
.app-btn:hover .play-store-badge {
    transform: scale(1.05);
}

.app-image {
    position: relative;
}

.app-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.app-image::after {
    content: 'Synergy Core';
    position: absolute;
    bottom: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.85);
    color: #333;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    z-index: 10;
    backdrop-filter: blur(5px);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--bg-white);
    margin: 5% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
}

.close {
    color: var(--text-light);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

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

.modal-body {
    padding: 2rem;
    max-height: 60vh;
    overflow-y: auto;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.cart-item-info h4 {
    margin-bottom: 0.5rem;
}

.cart-item-price {
    color: var(--primary-color);
    font-weight: 600;
}

.cart-item-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quantity-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quantity-btn {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.remove-btn {
    background: #ef4444;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
}

.cart-total {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.total-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.total-final {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.modal-footer {
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.checkout-content {
    max-width: 900px;
}

.form-section {
    margin-bottom: 2rem;
}

.form-section h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.checkout-summary {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    margin-top: 2rem;
}

.checkout-summary h3 {
    margin-bottom: 1.5rem;
}

.checkout-items {
    margin-bottom: 1.5rem;
}

.checkout-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.btn-block {
    width: 100%;
    margin-top: 2rem;
}

.success-content {
    text-align: center;
    padding: 3rem;
}

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto 2rem;
}

.success-content h2 {
    margin-bottom: 1rem;
}

.success-content p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .menu-toggle {
        display: block;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-stats {
        justify-content: center;
    }

    .health-card {
        grid-template-columns: 1fr;
    }

    .health-card:nth-child(even) {
        direction: ltr;
    }

    .ai-content {
        grid-template-columns: 1fr;
    }

    .app-content {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .modal-content {
        width: 95%;
        margin: 10% auto;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .features-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }

    .app-buttons {
        flex-direction: column;
    }

    .app-store-badge,
    .play-store-badge {
        width: 100%;
        height: auto;
    }
}