body {
    background-color: #efefef;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

h1 {
    color: #333;
    text-align: center;
}

p {
    color: #666;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
}