body {
	background-image: url('../images/bg_green@2x.jpg');
	background-size: 161px 161px;
}

.menu_button a {
	background-image: url('../images/menu_button@2x.png');
	background-size: 93px 138px;
}
.exit_button a {
	background-image: url('../images/exit_button@2x.png');
	background-size: 74px 88px;
}

.book .book_top .l,
.book .book_top .c {
	background-image: url('../images/book_tc@2x.png');
	background-size: 200px 20px;
}
.book .book_top .m {
	background-image: url('../images/book_tm@2x.png');
	background-size: 250px 20px;
}
.book .book_top .r {
	background-image: url('../images/book_tr@2x.png');
	background-size: 80px 20px;
}
.book .book_middle .l,
.book .book_middle .c {
	background-image: url('../images/book_mc@2x.jpg');
	background-size: 250px 100px;
}
.book .book_middle .m {
	background-image: url('../images/book_mm@2x.jpg');
	background-size: 250px 100px;
}
.book .book_middle .r {
	background-image: url('../images/book_mr@2x.png');
	background-size: 80px 100px;
}
.book .book_bottom .l {
	background-image: url('../images/book_bl@2x.png');
	background-size: 200px 25px;
}
.book .book_bottom .c {
	background-image: url('../images/book_bc@2x.png');
	background-size: 200px 25px;
}
.book .book_bottom .m {
	background-image: url('../images/book_bm@2x.png');
	background-size: 250px 25px;
}
.book .book_bottom .r {
	background-image: url('../images/book_br@2x.png');
	background-size: 80px 25px;
}

.page_navigation .page_back {
	background-image: url('../images/page_back@2x.png');
	background-size: 26px 6px;
}
.page_navigation .page_next {
	background-image: url('../images/page_next@2x.png');
	background-size: 42px 9px;
}

.contents ul li {
	background-image: url('../images/contents_dots@2x.png');
	background-size: 52px 6px;
}

.survey .buttons .prev_question {
	background-size: 42px 9px;
	background-image: url('../images/survey_back@2x.png');
}
.survey .buttons .next_question {
	background-size: 42px 9px;
	background-image: url('../images/survey_forward@2x.png');
}
.survey_checkboxes .variants a {
	background-image: url('../images/checkbox@2x.png');
	background-size: 23px 21px;
}
.survey_checkboxes .variants a.selected {
	background-image: url('../images/checkbox_checked@2x.png');
}