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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background-color: #fafafa;
}

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

/* Header Banner */
.header-banner {
    background: linear-gradient(135deg, #00D15E 0%, #00B050 100%);
    color: white;
    text-align: center;
    padding: 12px 0;
    font-weight: 500;
    font-size: 14px;
}

/* Navigation */
.navbar {
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.nav-menu a {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-menu a:hover {
    color: #00D15E;
}

/* Buttons */
.btn-primary {
    background: #00D15E;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

.btn-primary:hover {
    background: #00B050;
    transform: translateY(-1px);
}

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

.btn-secondary {
    background: transparent;
    color: #4a5568;
    border: 2px solid #e2e8f0;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

.btn-secondary:hover {
    border-color: #00D15E;
    color: #00D15E;
}

/* Hero Section */
.hero-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: #1a1a1a;
}

.hero-title .highlight {
    color: #00D15E;
}

.hero-description {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 40px;
    max-width: 600px;
    line-height: 1.6;
}

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

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
    background: white;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: #1a1a1a;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.step-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.step-number {
    background: #00D15E;
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 20px;
    margin: 0 auto 20px;
}

.step-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.step-card p {
    color: #4a5568;
    line-height: 1.6;
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: #f8fafc;
}

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

.feature-content h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: #1a1a1a;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-icon {
    font-size: 2rem;
    line-height: 1;
}

.feature-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.feature-item p {
    color: #4a5568;
    line-height: 1.6;
}

/* Trezor Device Illustration */
.feature-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.trezor-device {
    width: 200px;
    height: 300px;
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    position: relative;
}

.device-screen {
    width: 100%;
    height: 120px;
    background: #000;
    border-radius: 8px;
    margin-bottom: 40px;
    position: relative;
}

.device-screen::before {
    content: 'TREZOR';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #00D15E;
    font-weight: 700;
    font-size: 14px;
}

.device-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.button {
    width: 40px;
    height: 12px;
    background: #4a5568;
    border-radius: 6px;
}

/* Security Section */
.security-section {
    padding: 80px 0;
    background: white;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.security-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.security-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #00D15E;
}

.security-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.security-card p {
    color: #4a5568;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: #1a202c;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

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

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

.footer-section ul li a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section ul li a:hover {
    color: #00D15E;
}

.footer-description {
    color: #a0aec0;
    line-height: 1.6;
    margin-top: 16px;
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: 20px;
    text-align: center;
    color: #a0aec0;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .container {
        padding: 0 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .steps-grid,
    .security-grid {
        grid-template-columns: 1fr;
    }
}