* {
    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;
}

header {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

header h1 {
    color: #667eea;
    font-size: 2.5rem;
}

main {
    max-width: 800px;
    margin: 3rem auto;
    padding: 0 1rem;
}

section {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.hero h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

h2, h3 {
    margin-bottom: 1rem;
    color: #667eea;
}

.hero h2 {
    color: white;
}

ul, ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

code {
    background: #f4f4f4;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: #667eea;
}

footer {
    text-align: center;
    color: white;
    padding: 2rem;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .hero h2 {
        font-size: 1.5rem;
    }

    section {
        padding: 1.5rem;
    }
}