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

:root {
    --primary-green: #00854D;
    --dark-green: #006B3D;
    --light-bg: #F5F5F5;
    --white: #FFFFFF;
    --black: #000000;
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-light: #999999;
    --border-color: #E5E5E5;
    --success-green: #00C853;
}

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

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

.header {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    gap: 32px;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0 auto 0 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

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

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

.cart-btn {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
}

.cart-count {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--primary-green);
    color: var(--white);
    font-size: 10px;
    font-weight: 600;
    padding: 2px 5px;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
}

.btn-primary {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: var(--dark-green);
}

.btn-primary.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-light {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-light:hover {
    background: rgba(255, 255, 255, 0.3);
}

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

.hero-content {
    max-width: 700px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

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

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

.version-info span {
    position: relative;
    padding-right: 16px;
}

.version-info span:not(:last-child)::after {
    content: '•';
    position: absolute;
    right: 6px;
}

.features-section {
    padding: 80px 0;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 80px;
    background: var(--light-bg);
    padding: 64px;
    border-radius: 24px;
}

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

.feature-card.reverse .feature-content {
    order: 2;
}

.feature-card.reverse .feature-image {
    order: 1;
}

.feature-content h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feature-content h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-content p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.wallet-mockup {
    background: var(--white);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.wallet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.wallet-icon {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.wallet-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    background: var(--light-bg);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.icon-btn:hover {
    background: var(--border-color);
}

.wallet-balance {
    margin-bottom: 24px;
}

.currency {
    font-size: 14px;
    color: var(--text-secondary);
}

.balance {
    font-size: 36px;
    font-weight: 700;
    margin: 8px 0;
}

.balance-change {
    font-size: 14px;
    font-weight: 600;
}

.balance-change.positive {
    color: var(--success-green);
}

.asset-list {
    margin-bottom: 24px;
}

.asset-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.asset-item:last-child {
    border-bottom: none;
}

.asset-icon {
    width: 32px;
    height: 32px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.asset-item span:nth-child(2) {
    flex: 1;
}

.asset-amount {
    font-weight: 600;
}

.chart {
    height: 120px;
    display: flex;
    align-items: flex-end;
}

.chart-bars {
    display: flex;
    gap: 12px;
    width: 100%;
    height: 100%;
    align-items: flex-end;
}

.bar {
    flex: 1;
    background: var(--border-color);
    border-radius: 4px 4px 0 0;
    transition: background 0.2s;
}

.bar.active {
    background: var(--primary-green);
}

.device-mockup {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.device-screen {
    background: var(--text-primary);
    color: var(--white);
    border-radius: 12px;
    padding: 24px;
    width: 280px;
}

.screen-content h4 {
    font-size: 14px;
    margin-bottom: 16px;
    text-align: center;
}

.address-display {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
}

.address-display .icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.address-display .label {
    font-size: 12px;
    opacity: 0.7;
    margin-bottom: 4px;
}

.address-display .address {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.address-display .usd {
    font-size: 14px;
    opacity: 0.8;
}

.time-indicator {
    margin-top: 16px;
    text-align: center;
    font-size: 12px;
    opacity: 0.7;
}

.device-body {
    width: 100px;
    height: 160px;
    background: var(--text-primary);
    border-radius: 12px 12px 24px 24px;
}

.steps-display {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    justify-content: center;
}

.step {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    position: relative;
}

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

.step svg {
    position: absolute;
}

.step-labels {
    display: flex;
    gap: 16px;
    justify-content: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.step-labels span {
    width: 56px;
    text-align: center;
}

.expandable-features {
    padding: 80px 0;
    background: var(--light-bg);
}

.expandable-item {
    background: var(--white);
    border-radius: 12px;
    margin-bottom: 16px;
    transition: box-shadow 0.2s;
}

.expandable-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.expandable-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    cursor: pointer;
}

.expandable-header h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.expandable-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.expand-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.expand-btn:hover {
    color: var(--text-primary);
}

.security-features {
    padding: 80px 0;
}

.security-features h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 48px;
    max-width: 600px;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.security-card {
    background: var(--light-bg);
    padding: 32px;
    border-radius: 16px;
}

.security-card.highlight {
    background: var(--primary-green);
    color: var(--white);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.security-icon {
    margin-bottom: 16px;
    color: var(--primary-green);
}

.security-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.security-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.security-card.highlight h4 {
    font-size: 24px;
}

.coins-section {
    padding: 80px 0;
    background: var(--light-bg);
    text-align: center;
}

.coins-section h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 32px;
}

.coins-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--white);
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
}

.footer {
    background: var(--text-primary);
    color: var(--white);
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 64px;
}

.footer-brand p {
    margin: 24px 0;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

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

.social-links a {
    color: var(--white);
    transition: opacity 0.2s;
}

.social-links a:hover {
    opacity: 0.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

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

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

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: var(--white);
}

@media (max-width: 1024px) {
    .feature-card,
    .feature-card.reverse {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 48px;
    }

    .feature-card.reverse .feature-content,
    .feature-card.reverse .feature-image {
        order: 0;
    }

    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title {
        font-size: 42px;
    }
}

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

    .hero {
        padding: 48px 0;
    }

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

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

    .btn-primary.btn-large {
        width: 100%;
        justify-content: center;
    }

    .feature-card {
        padding: 32px 24px;
    }

    .feature-content h3 {
        font-size: 24px;
    }

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

    .security-features h2,
    .coins-section h2 {
        font-size: 32px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .nav-actions {
        flex-wrap: wrap;
    }

    .btn-primary {
        font-size: 14px;
        padding: 10px 20px;
    }

    .hero-title {
        font-size: 28px;
    }

    .wallet-mockup {
        padding: 16px;
    }

    .balance {
        font-size: 28px;
    }

    .device-screen {
        width: 240px;
    }

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