body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}

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

h1, h2, h3 {
    color: #333333;
}

h1 {
    font-size: 2em;
    margin-bottom: 0.5em;
}

h2 {
    font-size: 1.5em;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

h3 {
    font-size: 1.2em;
    margin-top: 1em;
    margin-bottom: 0.5em;
}

p, ul {
    margin: 0 0 1em 0;
    padding: 0;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 0.5em;
}