Image de body background full responsive :

@charset "utf-8";

html {
	overflow: scroll;
}

html, body {
	height: 100 %;
}

body {
	margin: 0 auto;
	width: 100%;
	max-width: 100%;
	height: 828px;
	min-height: 100%;
	background-image: url(/images/fonds/fond-flou-lumineux.jpg);
	background-position: center center;
	background-repeat: no-repeat;
	background-attachment: fixed;
	background-color: #FFF;
	background-size: cover;
	position: relative;
	overflow: scroll;
}

table#table-titre,
table#table-livre,
table#table-fin {
    width: 100%; 
    margin-left: auto; 
    margin-right: auto;
	border-spacing: 0px;
	display: none;
}

/*th { 
 border-width:1px;
 border-style:solid; 
 border-color:red;
}
td { 
 border-width:1px;
 border-style:solid; 
 border-color:red;
}*/

a:link,
a:visited,
a:hover
a:active {
	text-decoration: none;
}
@font-face {
    font-family: 'GeosansLight';
	src: url('GeosansLight.ttf') format('truetype');
}






/*----------Titre de la page----------*/

.titre {
	color: #666;
	letter-spacing: 7px;
	text-shadow: 4px 10px 12px rgba(0,0,0,0.7);
	padding: 40px 0px 50px 0px;
	font-family: 'GeosansLight', Verdana, Geneva, sans-serif;
	font-size:  58px;
	font-weight: lighter;
	text-align: center;
	line-height: 50px;
}
.titre a:link,
.titre a:visited,
.titre a:active {
	color:  #666;
}
.titre a:hover {
	color: #fff;
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
}
/*p::first-letter {
	font-size: 1.5em;
	margin-right: -5px;
	margin-left: 10px;
}*/
span {
	display: inline-block;
}
span:first-letter {
	font-size: 1.5em;
}
.inter-titre-1 {
	height: 10px;
	background-color: rgba(0,0,0,0.4);
}
.inter-titre-2 {
	height: 1px;
	background-color: rgba(0,0,0,0.4);
}
.inter-titre-3 {
	height: 10px;
	background-color: rgba(237,209,132,0.4);
}
.inter-titre-4 {
	height: 3px;
	background-color: rgba(0,0,0,0.4);
}
.sous-titre {
	padding: 10px;
	font-family: 'Dosis', sans-serif;
	font-weight: bold;
	font-size: 26px;
	text-align: center;
	vertical-align: middle;
	background-color: rgba(237,209,132,0.2);
}
.sous-titre a:link,
.sous-titre a:visited,
.sous-titre a:hover {
	color: #000;
	text-decoration: none;
}
.sous-titre a:hover {
	color: #fff;
	text-shadow: 1px 1px 10px rgba(0,0,0,0.5);
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
}




/*----------Contenu de la page----------*/

.vignette-livre {
	background-color: rgba(237,209,132,0.4);
	padding-top: 20px;
	padding-right: 20px;
	padding-bottom: 0px;
	padding-left: 20px;
	vertical-align:top;
}

.ref {
	background-color: rgba(237,209,132,0.4);
	vertical-align: top;
	padding-top: 20px;
	padding-right: 20px;
	padding-left: 20px;
	padding-bottom: 0px;
}


.titre-livre {
	font-family: "Arial Black", Gadget, sans-serif;
	font-weight: bold;
	font-size: 20px;
}

.resume {
	/**font-family: Arial, Helvetica, sans-serif;**/
	font-family: 'Dosis', sans-serif;
	font-size: 18px;
	margin-bottom: 0px;
}
.resume-mediumslateblue {
	/**font-family: Arial, Helvetica, sans-serif;**/
	font-family: 'Dosis', sans-serif;
	font-size: 18px;
	margin-bottom: 0px;
	margin-top: 0px;
	color: mediumslateblue;
}

.espace-vide {
	background-color: rgba(237,209,132,0.4);
	padding-top: 20px;
	padding-right: 20px;
	padding-bottom: 0px;
	padding-left: 20px;
	vertical-align:top;
}

.bouton-box {
	background-color: rgba(237,209,132,0.4);
	vertical-align: top;
	padding-top: 30px;
	padding-right: 20px;
	padding-left: 20px;
	padding-bottom: 20px;
	text-align: center;
}
.bouton {
	color: #000;
	font-size: 14px;
	font-family: 'Dosis', sans-serif;
	background-color: #ccc;
	padding: 3px 15px 6px 15px;
	display: block;
	width: 200px;
	margin: 30px auto;
	border-radius: 8px;
	border: 1px solid #666;
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
}
.bouton a:link,
.bouton a:visited,
.bouton a:active {
	color: #000;
	text-decoration: none;
}
.bouton:hover {
    background-color: #fff;
    color: #000;
	border: 1px solid #ccc;	
}
.bouton-en-ligne {
	color: #000;
	font-size: 14px;
	font-family: 'Dosis', sans-serif;
	background-color: #ccc;
	padding: 3px 15px 6px 15px;
	display: inline-block;
	width: 200px;
	margin: 10px;
	border-radius: 8px;
	border: 1px solid #666;
	-webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
}
.bouton-en-ligne a:link,
.bouton-en-ligne a:visited,
.bouton-en-ligne a:active {
	color: #000;
	text-decoration: none;
}
.bouton-en-ligne:hover {
    background-color: #fff;
    color: #000;
	border: 1px solid #ccc;	
}

.texte {
	background-color: rgba(237,209,132,0.4);
	vertical-align: top;
	padding-top: 20px;
	padding-right: 20px;
	padding-left: 20px;
	padding-bottom: 20px;
    -khtml-user-select: none;
    -webkit-user-select: none;
    -moz-user-select: -moz-none;
    -ms-user-select: none;
    user-select: none;
}

.titre-texte {
	font-family: 'Dosis', sans-serif;
	font-size: 22px;
	font-weight: bold;
}

.illus {
	background-color: rgba(237,209,132,0.4);
	text-align: center;
	padding-top: 20px;
	vertical-align:top;
}
 


.cliquez-lien-livre {
	font-family: Arial, Helvetica, sans-serif;
	font-style: italic;
}

.incise {
	font-family: 'Dosis', sans-serif;
	font-size: 18px;
	font-weight: normal;
}

.copyright {
	float: right;
	padding-right: 50px;
	font-family: 'Dosis', sans-serif;
	font-size: 12px;
	font-style: italic;
	font-weight: bolder;
}






/*----------Bas de page----------*/

.fin {
	height: 100px;
	margin: 0px auto;
	background-color: rgba(237,209,132,0.4);
	color: #666;
	text-align: center;
	letter-spacing: 5px;
	text-shadow: 2px 5px 6px rgba(0,0,0,0.7);
	padding: 0px 0px 30px 0px;
	font-family: 'GeosansLight', Verdana, Geneva, sans-serif;
	font-size:  14px;
	font-weight: lighter;
	vertical-align: bottom;
	line-height: 0px
}




@media only screen
	and (max-width : 480px)
	and (orientation : portrait) {
	/*Smartphone Galaxy S4 mini (portrait)*/

body {
	height: 828px;
}

table#table-titre,
table#table-livre,
table#table-fin {
    width: 100%;
}

table#table-titre tr:nth-child(8), 
table#table-titre tr:nth-child(9),
table#table-livre tr td:nth-child(2),
table#table-livre tr:nth-child(4) {
	display: none;
}

.titre {
	letter-spacing: 4px;
	font-size: 40px;
	line-height: 40px;
	padding: 20px 0px 15px 0px;
}
.vignette-livre {
	text-align: center;
}

.fin {
	letter-spacing: 0px;
}
}


@media only screen
	and (max-width : 720px)
	and (orientation : landscape) {
	/*Smartphone Galaxy S4 mini (paysage)*/

body {
	/*height: 828px;*/
	height: 360px;
}

table#table-titre,
table#table-livre,
table#table-fin {
    width: 100%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8),
table#table-livre tr:nth-child(2),
table#table-livre tr:nth-child(3) {
	display: none;
}

.titre {
	letter-spacing: 6px;
	font-size: 52px;
	line-height: 50px;
	padding: 20px 0px 15px 0px;
}
}


@media only screen
	and (min-width : 480px)
	and (max-width : 800px)
	and (orientation : portrait) {
	/*Tablette Surface RT (Portrait)*/

table#table-titre,
table#table-livre,
table#table-fin {
    width: 100%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8),
table#table-livre tr:nth-child(2),
table#table-livre tr:nth-child(3) {
	display: none;
}

.titre {
	letter-spacing: 6px;
	font-size: 52px;
	line-height: 50px;
	padding: 25px 0px 20px 0px;

}
}


@media only screen
	and (min-width : 800px)
	and (max-width : 1200px) {
	/*Tablette Surface RT (paysage)*/
	/*écrans jusqu'à 1200px de large*/

table#table-titre,
table#table-livre,
table#table-fin {
    width: 80%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8),
table#table-livre tr:nth-child(2),
table#table-livre tr:nth-child(3) {
	display: none;
}

.titre {
	letter-spacing: 8px;
	font-size: 54px;
	line-height: 50px;
	padding: 25px 0px 30px 0px;

}
}


@media only screen
	and (min-width : 1200px)
	and (max-width : 1600px) {
	/*écrans jusquà 1600 px de large*/

table#table-titre,
table#table-livre,
table#table-fin {
    width: 80%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8),
table#table-livre tr:nth-child(2),
table#table-livre tr:nth-child(3) {
	display: none;
}

.titre {
	letter-spacing: 10px;
	font-size: 58px;
	line-height: 50px;
	padding: 30px 0px 30px 0px;
}
}



@media only screen
	and (min-width : 1600px) {
	/*écrans d'une largeur supérieure à 1600 px*/

table#table-titre,
table#table-livre,
table#table-fin {
    width: 70%;
}

table#table-titre tr:nth-child(3), 
table#table-titre tr:nth-child(4), 
table#table-titre tr:nth-child(5),
table#table-titre tr:nth-child(6),
table#table-titre tr:nth-child(7),
table#table-titre tr:nth-child(8),
table#table-livre tr:nth-child(2),
table#table-livre tr:nth-child(3) {
	display: none;
}

.titre {
	letter-spacing: 10px;
	font-size: 58px;
	line-height: 50px;
	padding: 40px 0px 50px 0px;
}
}


 
/* Return on top */
#returnOnTop {
    background: url('/images/logos/fleche.png') no-repeat;
    bottom: 2%;
    cursor: pointer;
    display: none;
    filter: alpha(opacity = 50); /* IE < 8 */
    height: 60px;
    opacity: 0.5;
    position: fixed;
    right: 2%;
    width: 80px;
}

#returnOnTop:hover {
    filter: alpha(opacity = 100); /* IE < 8 */
    opacity: 1;
}