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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
}

section {
    margin-bottom: 20px;
}

section h2 {
    margin-bottom: 10px;
    color: #444;
}

section p, section ul, section ol {
    margin-bottom: 15px;
}

ul, ol {
    padding-left: 20px;
}

ul li, ol li {
    margin-bottom: 10px;
}

footer {
    text-align: center;
    padding: 10px;
    background: #333;
    color: #fff;
    position: fixed;
    width: 100%;
    bottom: 0;
}