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

:root {
    --primary-green: #0F6148;
    --dark-green: #0A4535;
    --light-bg: #F5F5F5;
    --white: #FFFFFF;
    --black: #000000;
    --gray-text: #6B7280;
    --gray-light: #E5E7EB;
    --gray-dark: #374151;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--gray-dark);
    background: var(--light-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.navbar {
    background: var(--white);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--black);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cart-btn {
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    color: var(--gray-dark);
}

.cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--primary-green);
    color: white;
    font-size: 0.7rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.currency {
    color: var(--gray-text);
    font-size: 0.9rem;
}

.cta-btn {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.cta-btn:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 97, 72, 0.3);
}

.hero {
    background: var(--white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

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

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--black);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.btn-primary {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(15, 97, 72, 0.3);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-dark);
    border: 2px solid var(--gray-light);
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary-green);
    color: var(--primary-green);
    transform: translateY(-2px);
}

.version-info {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    font-size: 0.875rem;
    color: var(--gray-text);
}

.version-info span {
    padding: 0.25rem 0.75rem;
    background: var(--light-bg);
    border-radius: var(--radius-sm);
}

.feature-section {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.feature-section:nth-child(even) {
    background: var(--light-bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.feature-section.reverse .feature-grid {
    direction: rtl;
}

.feature-section.reverse .feature-text {
    direction: ltr;
}

.feature-text h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-green);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.feature-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.feature-text p {
    font-size: 1.125rem;
    color: var(--gray-text);
    line-height: 1.8;
}

.app-mockup {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: 0 20px 60px rgba(0,0,0,0.1);
}

.mockup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.mockup-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-green);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.mockup-title {
    font-weight: 600;
    flex: 1;
    margin-left: var(--spacing-sm);
}

.mockup-actions {
    display: flex;
    gap: 0.5rem;
}

.mockup-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
}

.mockup-balance {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.mockup-coins {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.coin-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--light-bg);
    border-radius: var(--radius-sm);
}

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

.coin-icon.btc {
    background: #F7931A;
}

.coin-icon.eth {
    background: #627EEA;
}

.coin-icon.ltc {
    background: #345D9D;
}

.coin-icon.xrp {
    background: #23292F;
}

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

.chart-bars {
    display: flex;
    gap: var(--spacing-sm);
    width: 100%;
    height: 100%;
    align-items: flex-end;
}

.bar {
    flex: 1;
    background: var(--gray-light);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: var(--transition);
}

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

.device-mockup {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.device-screen {
    background: #1a1a1a;
    color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    width: 280px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.device-header {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.device-address {
    margin-bottom: var(--spacing-md);
}

.address-label {
    font-size: 0.75rem;
    opacity: 0.6;
    margin-bottom: 0.25rem;
}

.address-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.address-usd {
    opacity: 0.8;
}

.device-status {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    opacity: 0.8;
}

.device-body {
    width: 80px;
    height: 140px;
    background: linear-gradient(180deg, #2a2a2a 0%, #1a1a1a 100%);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    position: relative;
}

.device-body::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: #333;
    border-radius: 50%;
}

.steps-container {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    transition: var(--transition);
}

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

.step-label {
    font-size: 0.875rem;
    color: var(--gray-text);
}

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

.expandable-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
}

.expandable-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.expandable-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    cursor: pointer;
}

.expandable-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.expandable-header p {
    color: var(--gray-text);
}

.expand-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--light-bg);
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.security-features {
    background: var(--white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.security-features h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.security-card {
    background: var(--light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.security-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.1);
}

.security-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-green);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    margin: 0 auto var(--spacing-sm);
}

.security-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.security-card p {
    color: var(--gray-text);
    line-height: 1.6;
}

.discover-btn {
    background: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.discover-btn:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(15, 97, 72, 0.3);
}

.crypto-support {
    background: var(--light-bg);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.crypto-support h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.crypto-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.crypto-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.footer {
    background: #1a1a1a;
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: #999;
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-green);
    transform: translateY(-4px);
}

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

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

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

.footer-column ul li a {
    color: #999;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .feature-section.reverse .feature-grid {
        direction: ltr;
    }

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

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

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

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

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

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

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

    .version-info {
        flex-direction: column;
    }

    .steps-container {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

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

    .feature-text h3 {
        font-size: 1.5rem;
    }

    .security-features h2 {
        font-size: 1.75rem;
    }
}

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

    .nav-actions {
        gap: 0.25rem;
    }

    .currency {
        display: none;
    }

    .cta-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .app-mockup {
        padding: var(--spacing-sm);
    }

    .mockup-balance {
        font-size: 2rem;
    }

    .device-screen {
        width: 100%;
        max-width: 280px;
    }
}