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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
}

header nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
}

header nav ul li {
    margin: 0 15px;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 1.2rem;
    text-transform: uppercase;
}

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

footer {
    text-align: center;
    padding: 1rem;
    background: #333;
    color: #fff;
    position: relative;
    bottom: 0;
    width: 100%;
}