body { font-family: Arial, sans-serif; margin:0; background:#fff; color:#333; }
header, footer { text-align:center; background:#722F37; color:#fff; padding:1em 0; }
header img { max-height:100px; display:block; margin:0 auto 10px; }
nav { background:#722F37; text-align:center; padding:10px 0; }
nav a { color:#fff; text-decoration:none; margin:0 12px; font-weight:bold; }
main { padding:2em; max-width:900px; margin:auto; }
h1,h2 { color:#722F37; }
/* -------------------- MOBILE OPTIMIZATION -------------------- */
@media(max-width: 768px) {

    body {
        padding: 0 10px;
        font-size: 16px;
        line-height: 1.5;
    }

    header img {
        max-width: 120px;
        height: auto;
        display: block;
        margin: 0 auto 10px auto;
    }

    h1, h2, h3 {
        text-align: center;
        margin-top: 10px;
    }

    nav {
        display: block;
        text-align: center;
        padding: 10px 0;
    }

    nav a {
        display: inline-block;
        padding: 8px 12px;
        margin: 5px 3px;
        font-size: 15px;
    }

    main {
        padding: 10px;
    }

    /* Collapsible spacing */
    details summary {
        font-size: 17px;
        padding: 12px;
        border-radius: 6px;
        background-color: #f7f7f7;
    }

    details ol {
        padding-left: 18px;
        margin-top: 10px;
    }

    /* Make images scale properly */
    img {
        max-width: 100%;
        height: auto;
    }
}