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

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

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid #e2e8f0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #4f46e5;
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #64748b;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #4f46e5;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 8rem 2rem 4rem;
    text-align: center;
    margin-top: 0;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: white;
    color: #4f46e5;
    box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #4f46e5;
    transform: translateY(-2px);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: #f8fafc;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #1e293b;
}

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

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: 5rem 0;
    background: white;
    text-align: center;
}

.download-subtitle {
    font-size: 1.125rem;
    color: #64748b;
    margin-bottom: 3rem;
}

.download-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 1rem;
    text-decoration: none;
    color: #1e293b;
    transition: all 0.3s ease;
    min-width: 250px;
}

.download-btn:hover {
    border-color: #4f46e5;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(79, 70, 229, 0.1);
}

.download-icon {
    font-size: 2rem;
}

.download-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.download-info p {
    color: #64748b;
    font-size: 0.875rem;
}

.version-info {
    color: #64748b;
    font-size: 0.875rem;
}

/* Guide Section */
.guide {
    padding: 5rem 0;
    background: #f8fafc;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    padding: 2rem 1rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.step h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1e293b;
}

.step p {
    color: #64748b;
}

/* Community Section */
.community {
    padding: 5rem 0;
    background: white;
    text-align: center;
}

.community p {
    font-size: 1.125rem;
    color: #64748b;
    margin-bottom: 2rem;
}

.community-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.community-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: #f1f5f9;
    border-radius: 0.5rem;
    text-decoration: none;
    color: #475569;
    font-weight: 500;
    transition: all 0.3s ease;
}

.community-btn:hover {
    background: #4f46e5;
    color: white;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 2rem 0;
    text-align: center;
}

.footer a {
    color: #cbd5e1;
    text-decoration: none;
    margin: 0 0.5rem;
}

.footer a:hover {
    color: white;
}

/* Language Switcher */
.language-switcher select {
    background: transparent;
    border: 1px solid #e2e8f0;
    border-radius: 0.375rem;
    padding: 0.5rem;
    font-size: 0.875rem;
    color: #64748b;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-switcher select:hover {
    border-color: #4f46e5;
    color: #4f46e5;
}

.language-switcher select:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        min-width: 280px;
    }
    
    .community-links {
        flex-direction: column;
        align-items: center;
    }
}