body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f0f0f0;
}

header {
    background: #4CAF50;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-bottom: 20px;
}

nav {
    background: #333;
    padding: 0.5rem;
    margin-bottom: 20px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem;
    margin-right: 10px;
}

main {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.highlight {
    background-color: #ffff99;
    padding: 5px;
    border-radius: 3px;
}