/**
 * Computation
 */

/* the size of a 2 pages spread */
@spread: @page-width * 2;

/* the extra space around the page */
@crop: @crop-size + @bleed; // TODO: find a more appropriate name

/* geometry of the print sheet */
@paper-width: @page-width + ( @crop * 2 );
@paper-height: @page-height + ( @crop * 2 );


/**
 * Definition of the page
 */
@page {
    /* Support for `marks` is missing in every single web browser out there*/
    size: @paper-width @paper-height;  // format avec cropmarks
    margin: 0;
}


/**
 * Canvas
 */

@media all {
    html {
        background-color: white;
    }
    .paper {
        width: @page-width; 
        height: @page-height;

        /* Crop marks */
        padding: @crop;

        counter-increment: page-counter;

        /* utile ou non? pour éviter qu'un papier soit coupé par le format de la
        * page lors de la conversion et l'arrondis des unités */
        page-break-inside: avoid;
        page-break-after: always;
        overflow: hidden;

    }
    .page {
        width: @page-width;
        height: @page-height;

        position: relative;
    }

    // TODO: changer le format du papier en spread pour pouvoir imprimer en planche
    .spread .paper {
        float: left;
    }
    .spread .paper:first-child {
        margin-left: @paper-width - @crop !important;
    }
    .spread .paper:nth-child(odd) {
        padding-left: 0;
    }
    .spread .paper:nth-child(even) {
        padding-right: 0;
    }
}

@media screen {
    #pages {
        width: @paper-width; 
        height: @paper-height;

        margin-left: auto;
        margin-right: auto;
    }
    .spread #pages {
        width: @paper-width * 2; 
        height: @paper-height * 2;
    }
    .paper {
        /* centrer la page à l'écran */
        background-color: white;
        margin-top: 1em;
        margin-bottom: 1em;
    }
    .page {
        text-rendering: optimizeLegibility;
    }
    .normal .paper {
        outline: 1px solid lightgray;
        box-shadow: 2px 2px 1px 1px lightgray;
    }
    .normal .page {
        outline: 1px solid gold;
    }
    .preview .page {
        outline: 1px solid lightgray;
        box-shadow: 2px 2px 1px 1px lightgray;
    }
    .debug #story {
        outline: 1pt solid green;
    }
}

@media print {
    html {
        width: @paper-width;
    }
    body {
        /* Allows printing of background colors */
        -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
    }
    .paper {
        /* Crop marks */
        background-image:
            linear-gradient(90deg, red 0, red 100%),
            linear-gradient(0deg, red 0, red 100%),
            linear-gradient(90deg, red 0, red 100%),
            linear-gradient(0deg, red 0, red 100%),
            linear-gradient(90deg, red 0, red 100%),
            linear-gradient(0deg, red 0, red 100%),
            linear-gradient(90deg, red 0, red 100%),
            linear-gradient(0deg, red 0, red 100%),
        ;
        background-size: 
            @crop-size 2px,
            2px @crop-size,
            @crop-size 2px,
            2px @crop-size,
            @crop-size 2px,
            2px @crop-size,
            @crop-size 2px,
            2px @crop-size
        ;
        background-position:
            left @crop,
            @crop top,
            right @crop,
            right @crop top,
            right bottom @crop,
            right @crop bottom,
            left bottom @crop,
            @crop bottom
        ;
        background-repeat: no-repeat;
    }
}

/**
 * UI
 */
@media screen {
    .button {
        z-index: 1000;
        background-color: black;
        font-family: sans-serif; 
        text-transform: uppercase;
        font-size: 9pt !important;
        letter-spacing: 1pt;
        color: white;
        margin: 0;
        padding: 5pt 7pt;
        cursor: pointer;
        border: 0;
    }
    .button:hover {
        background-color: white;
        color: black;
        outline: 1pt solid black;
    }
    .button-active {
        background-color: white;
        color: black;
        outline: 1pt solid black;
    }
    .lo-res {
        outline: 10px solid red;
    }
    #interface {
        font-family: sans-serif; 
        text-transform: uppercase;
        font-size: 10pt !important;
        line-height: 14pt;
        letter-spacing: 1pt;
        position: fixed;
        bottom: 10pt;
        right: 10pt;
    }

    #interface a {
        text-decoration: none;
        position: static;
    }

    #toc {
        display: inline-block;
    }
    #toc-pages {
        padding: 0.5em 0;
        display: none;
        background-color: black;
        position: absolute;
        right: 0;
        bottom: 2em;
        height: 200pt;
        width: 80pt;
        overflow: auto;
    }
    #toc-pages a {
        padding: 0 1em;
        color: white;
    }
    #toc-pages a:hover {
        background-color: white;
        color: black;
    }
    #toc-pages button {
        width: 80pt;
    }
}

@media print {
    #interface {
        display: none;
    }
}

/**
 * Helpers
 */

.region-break {
    /* Apply this class to an element to put it on a new region.
     * Hint: 
     * You can also use an empty <div class="page-break"></div> 
     * if you want to put manual page breaks without attaching it to an HTML element
     */
    -webkit-region-break-before: always;
}
.debug .region-break {
    border-top: 1pt dashed blue;
}