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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    font-weight: 700;
}

.tagline {
    font-size: 1.3em;
    opacity: 0.95;
}

/* Hero Section */
.hero {
    background: white;
    padding: 80px 0;
}

.app-info {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.app-info h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
    color: #2d3748;
}

.app-info p {
    font-size: 1.2em;
    margin-bottom: 30px;
    color: #4a5568;
    line-height: 1.8;
}

.download-button {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 30px;
    font-size: 1.1em;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 6px rgba(102, 126, 234, 0.4);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.6);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: #f8f9fa;
}

.features h2 {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 50px;
    color: #2d3748;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.feature h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: #2d3748;
}

.feature p {
    color: #4a5568;
    line-height: 1.7;
}

/* Footer */
footer {
    background: #2d3748;
    color: white;
    padding: 40px 0;
    text-align: center;
}

footer nav {
    margin-bottom: 20px;
}

footer nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    opacity: 0.9;
    transition: opacity 0.2s;
}

footer nav a:hover {
    opacity: 1;
    text-decoration: underline;
}

footer p {
    opacity: 0.7;
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .tagline {
        font-size: 1.1em;
    }
    
    .app-info h2 {
        font-size: 1.8em;
    }
    
    .app-info p {
        font-size: 1em;
    }
    
    .features h2 {
        font-size: 1.8em;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}