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

:root {
    --primary-green: #00A868;
    --dark-green: #008854;
    --black: #000000;
    --dark-gray: #1a1a1a;
    --medium-gray: #666666;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    color: var(--black);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--medium-gray);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cart-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cart-btn:hover {
    border-color: var(--primary-green);
    background-color: var(--light-gray);
}

.cta-btn {
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-btn:hover {
    background-color: var(--dark-green);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.hero {
    padding: 80px 0 60px;
    background-color: var(--light-gray);
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--black);
    margin-bottom: 16px;
    max-width: 800px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--medium-gray);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.btn-primary {
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.btn-secondary {
    color: var(--dark-gray);
    text-decoration: none;
    padding: 14px 28px;
    font-weight: 600;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: inline-block;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--primary-green);
    color: var(--primary-green);
}

.version-info {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--medium-gray);
    flex-wrap: wrap;
}

.version-info span {
    padding: 4px 0;
}

.feature-section {
    padding: 100px 0;
}

.feature-section.alternate {
    background-color: var(--light-gray);
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.feature-grid.reverse {
    grid-template-columns: 1fr 1fr;
}

.feature-grid.reverse .feature-visual {
    order: -1;
}

.feature-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 8px;
}

.feature-content h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 16px;
}

.feature-content p {
    font-size: 17px;
    color: var(--medium-gray);
    line-height: 1.7;
}

.wallet-card {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
}

.wallet-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.wallet-icon {
    width: 40px;
    height: 40px;
    background-color: var(--light-gray);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.balance {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

.wallet-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.action-badge {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
}

.action-badge.receive {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.action-badge.send {
    background-color: #e3f2fd;
    color: #1976d2;
}

.assets-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.asset-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.asset-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.asset-icon.bitcoin {
    background-color: #f7931a;
    color: var(--white);
}

.asset-icon.ethereum {
    background-color: #627eea;
    color: var(--white);
}

.asset-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.asset-name {
    font-weight: 600;
    color: var(--black);
}

.asset-amount {
    font-size: 13px;
    color: var(--medium-gray);
}

.asset-value {
    font-weight: 600;
    color: var(--black);
}

.chart {
    width: 100%;
    height: 60px;
}

.device-mockup {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    border-radius: 24px;
    padding: 40px 24px;
    box-shadow: var(--shadow-lg);
}

.device-screen {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
}

.transaction-card {
    text-align: center;
}

.tx-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    font-weight: 600;
}

.tx-icon {
    width: 32px;
    height: 32px;
    background-color: var(--primary-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.tx-amount {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.tx-usd {
    font-size: 20px;
    color: var(--medium-gray);
    margin-bottom: 24px;
}

.tx-details {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.tx-row {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.setup-section {
    padding: 100px 0;
    text-align: center;
}

.setup-section h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 8px;
}

.setup-section h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 16px;
}

.section-description {
    font-size: 17px;
    color: var(--medium-gray);
    max-width: 700px;
    margin: 0 auto 48px;
}

.steps {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: var(--medium-gray);
    transition: all 0.3s ease;
}

.step-number.active {
    background-color: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.step-label {
    font-size: 15px;
    color: var(--medium-gray);
}

.accordion-section {
    padding: 60px 0;
    background-color: var(--light-gray);
}

.accordion-item {
    background: var(--white);
    border-radius: 12px;
    margin-bottom: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.accordion-item:hover {
    box-shadow: var(--shadow-lg);
}

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

.accordion-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 4px;
}

.accordion-header p {
    font-size: 15px;
    color: var(--medium-gray);
}

.accordion-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--medium-gray);
    transition: transform 0.3s ease;
}

.accordion-toggle:hover {
    color: var(--primary-green);
}

.security-features {
    padding: 100px 0;
}

.security-features h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 48px;
    max-width: 600px;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 48px;
}

.security-card {
    background: var(--light-gray);
    padding: 32px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.security-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.security-icon {
    width: 48px;
    height: 48px;
    background-color: var(--primary-green);
    color: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.security-card h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 12px;
}

.security-card p {
    font-size: 15px;
    color: var(--medium-gray);
    line-height: 1.6;
}

.btn-discover {
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.btn-discover:hover {
    background-color: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.coins-section {
    padding: 100px 0;
    text-align: center;
    background-color: var(--light-gray);
}

.coins-section h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 32px;
}

.coins-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--black);
    color: var(--white);
    padding: 12px 24px;
    border-radius: 24px;
    font-weight: 600;
}

.footer {
    background-color: var(--black);
    color: var(--white);
    padding: 60px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--medium-gray);
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-green);
    transform: translateY(-2px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: var(--medium-gray);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--primary-green);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--medium-gray);
}

.footer-region {
    display: flex;
    gap: 8px;
}

@media (max-width: 1024px) {
    .feature-grid,
    .feature-grid.reverse {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .feature-grid.reverse .feature-visual {
        order: 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    .feature-content h2 {
        font-size: 28px;
    }

    .security-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .steps {
        gap: 32px;
    }

    .coins-section h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .wallet-card {
        padding: 24px;
    }

    .balance {
        font-size: 32px;
    }

    .nav-actions .cart-btn {
        padding: 8px;
    }

    .nav-actions .cart-btn span {
        display: none;
    }
}