* {
    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: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

header {
    text-align: center;
    padding: 60px 20px;
    color: white;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.9;
}

main {
    padding: 40px 20px;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.card h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.card p {
    color: #666;
    line-height: 1.8;
}

.card ul {
    list-style: none;
    padding: 0;
}

.card ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #666;
}

.card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #667eea;
}

footer {
    text-align: center;
    padding: 30px 20px;
    color: white;
    opacity: 0.9;
}

footer p {
    font-size: 0.9em;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .hero {
        grid-template-columns: 1fr;
    }
}