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

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

header {
    background: #f8f9fa;
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid #e9ecef;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

nav a {
    text-decoration: none;
    color: #6c757d;
    margin: 0 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #495057;
}

main {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

section {
    margin-bottom: 3rem;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

section p {
    font-size: 1.1rem;
    color: #6c757d;
}

footer {
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-top: 1px solid #e9ecef;
    color: #6c757d;
}