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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #111;
    color: #ccc;
    line-height: 1.6;
    max-width: 650px;
    margin: 0 auto;
    padding: 20px;
}

header {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #333;
}

nav {
    display: flex;
    gap: 20px;
}

nav a {
    color: #888;
    text-decoration: none;
}

nav a:hover {
    color: #fff;
}

main section {
    margin-bottom: 35px;
}

h1 {
    color: #fff;
    font-size: 1.8rem;
    margin-bottom: 15px;
}

h2 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

h3 {
    color: #ddd;
    font-size: 1rem;
    margin-bottom: 8px;
    margin-top: 15px;
}

p {
    margin-bottom: 10px;
}

p.small {
    font-size: 0.85rem;
    color: #888;
}

strong {
    color: #fff;
}

a {
    color: #6cf;
}

a:hover {
    color: #9df;
}

ul {
    margin-left: 20px;
    margin-bottom: 10px;
}

li {
    margin-bottom: 5px;
}

footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #666;
    font-size: 0.9rem;
}

@media (max-width: 500px) {
    body {
        padding: 15px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    nav {
        flex-wrap: wrap;
        gap: 15px;
    }
}