:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --text-color: #333;
    --background-color: #f8f9fa;
}

* {
    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: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

h2 {
    color: var(--secondary-color);
    margin: 2rem 0 1rem;
}

section {
    margin-bottom: 2rem;
}

ul {
    list-style-position: inside;
    margin: 1rem 0;
}

li {
    margin-bottom: 0.5rem;
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid #ddd;
    color: #666;
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.4rem;
    }
}