/* style.css */
* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
    color: #333;
    background-color: #fff;
}

h1, h2, h3 {
    line-height: 1.2;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: #0070f3;
}