@charset "utf-8";
/* CSS Document */

.quelle_block {
	display:block; width:125px;
	font-size:16pt; font-weight: bold; font-family: 'header-big';
	margin:10px auto 0 0; padding: 0;
	text-align: center;
	background-color: yellow; color: black;
}

.video-frame {
	position:relative; display: block;
	width:70%; height:auto;
	margin-top:25px;
}

#exercise1 .i_ex1, #exercise2 .i_ex2 {
	margin:0 auto;
	width:70%;
}


@media screen and (max-width : 1250px ){
#exercise1 .i_ex1, #exercise2 .i_ex2 {
	width:75%;
}
}


@media screen and (max-width : 980px ){
.video-frame {
	width:100%; height:auto;
}
#exercise1 .i_ex1, #exercise2 .i_ex2 {
	width:85%;
}
}


@media screen and (max-width : 690px ){
.video-frame {
	width:100%; height:auto;
}
#exercise1 .i_ex1, #exercise2 .i_ex2 {
	width:100%;
}
}