* {
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #40E0D0;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
}

main {
    padding: 2rem;
}

nav ol {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

nav ol li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

nav ol li a:hover {
    background-color: #333;
    color: #fff;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem;
}