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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Header */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo h1 {
    font-size: 2rem;
    color: #2563eb;
    font-weight: 700;
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.95;
}

.download-section {
    background: white;
    color: #333;
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.download-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2563eb;
}

.version-info {
    margin-bottom: 1.5rem;
    color: #666;
}

.btn-download {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 3rem;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-bottom: 1rem;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.terms, .requirements {
    font-size: 0.875rem;
    color: #666;
    margin-top: 0.5rem;
}

.link {
    color: #2563eb;
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

/* Partners Section */
.partners {
    padding: 4rem 0;
    background-color: #f9fafb;
    text-align: center;
}

.partners h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.partners p {
    color: #6b7280;
    margin-bottom: 2rem;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.partner-logo {
    height: 80px;
    background-color: #e5e7eb;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Why Choose Section */
.why-choose {
    padding: 4rem 0;
    text-align: center;
}

.why-choose h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #6b7280;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 50px;
    height: 50px;
    filter: brightness(0) invert(1);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.8;
}

/* Main Features Section */
.main-features {
    padding: 4rem 0;
    background-color: #f9fafb;
}

.main-features h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
    color: #1f2937;
}

.main-features .section-subtitle {
    text-align: center;
}

.features-list {
    margin-top: 3rem;
}

.feature-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.feature-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.feature-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-image img {
    width: 100px;
    height: 100px;
    filter: brightness(0) invert(1);
}

.feature-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.feature-item p {
    color: #6b7280;
    line-height: 1.8;
}

.docs-link {
    text-align: center;
    margin-top: 3rem;
    font-size: 1.125rem;
}

/* Footer */
footer {
    background-color: #1f2937;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .feature-row {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}