.bl {
    display: block;
    font-size: 0.75em;
    orphans: 2;
    widows: 2;
    margin: 0
    }
.calibre {
    display: block;
    font-size: 1em;
    padding-left: 0;
    padding-right: 0;
    margin: 0 5pt
    }
.calibre1 {
    display: block
    }
.calibre2 {
    height: auto;
    width: auto
    }
.calibre3 {
    font-style: italic
    }
.calibre4 {
    font-size: 0.75em;
    line-height: normal;
    vertical-align: top
    }
.chap-n {
    display: block;
    font-family: serif;
    font-size: 1em;
    font-style: normal;
    font-weight: normal;
    orphans: 2;
    text-align: center;
    text-indent: 0;
    widows: 2;
    margin: 0 0 2.5em
    }
.copy-isbn {
    display: block;
    font-size: 0.75em;
    orphans: 2;
    text-align: center;
    widows: 2;
    margin: 0 0 1em
    }
.couv {
    display: block;
    font-size: 0.75em;
    orphans: 2;
    text-align: center;
    widows: 2;
    margin: 0
    }
.dev-txt-c {
    display: block;
    font-size: 1em;
    font-style: normal;
    font-weight: normal;
    orphans: 2;
    text-align: center;
    text-indent: 0;
    widows: 2;
    margin: 0
    }
.dev-txt-j {
    display: block;
    font-size: 1em;
    font-style: normal;
    font-weight: normal;
    orphans: 2;
    text-align: justify;
    text-indent: 1em;
    widows: 2;
    margin: 0
    }
.div-copy {
    display: block;
    font-style: normal;
    font-weight: normal;
    margin-top: 70%;
    text-align: left;
    text-indent: 0
    }
.div-dev {
    display: block;
    margin-bottom: 2em;
    text-indent: 1em
    }
.div-exer {
    display: block;
    padding-top: 30%
    }
.div-ident {
    display: block;
    font-family: sans-serif;
    margin-bottom: 0;
    padding-top: 0
    }
.div-pre {
    display: block;
    margin-top: 30%
    }
.exer-txt-j {
    display: block;
    font-size: 1em;
    orphans: 2;
    text-align: right;
    text-indent: 1em;
    widows: 2;
    margin: 4em 0 0 30%
    }
.imgcouv {
    height: 90%;
    width: auto
    }