@media print {
    /* 1. Define the Physical Page Geometry & Global Margins */
    @page {
        size: 6in 9in; /* Standard US Trade Size */

        /* Default baseline margins */
        margin-top: 0.75in;
        margin-bottom: 0.75in;
    }

    /* 2. Mirrored Margins: Account for the Spine Gutter */
    /* Right-side pages (Odd numbers) */
    @page :right {
        margin-left: 0.75in;  /* Inside Gutter: Wider to protect text near binding */
        margin-right: 0.5in;  /* Outside Edge */
    }

    /* Left-side pages (Even numbers) */
    @page :left {
        margin-left: 0.5in;   /* Outside Edge */
        margin-right: 0.75in; /* Inside Gutter: Wider to protect text near binding */
    }

    /* 3. Clean up the mdBook UI for Print */
    #sidebar,
    #menu-bar,
    .theme-buttons,
    .header-link,
    #search-wrapper {
        display: none !important; /* Completely hides menus, search, and navigation sidebars */
    }

    #content, #page-wrapper {
        margin: 0 !important;
        padding: 0 !important;
        background: transparent !important;
    }

    main {
        max-width: 100% !important;
        font-size: 11pt; /* Professional body text scaling */
        line-height: 1.5;
        color: #000000 !important;
    }

    /* 4. Formatting Fixes for Professional Layouts */
    h1, h2, h3, h4 {
        page-break-after: avoid; /* Prevents heading from sitting alone at the bottom of a page */
        color: #000000 !important;
    }

    p, blockquote {
        orphans: 3; /* Prevents a lonely line at the bottom of a page */
        widows: 3;  /* Prevents a lonely line at the top of a page */
    }

    pre, code {
        white-space: pre-wrap !important; /* Ensures long code snippets wrap rather than clipping off-page */
        font-size: 9.5pt;
    }
}