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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/web137/html/Ferienwohnung/responsive.css:1) in <b>/var/www/web137/html/Ferienwohnung/responsive.css</b> on line <b>1</b><br />
 *{margin:0;padding:0}
* {
	border-style: solid;
	border-width: 0px;
	margin: 0;
	padding: 0;
}
body {
	background-color: #cdcdcd;
	border: 0px solid #333;
	border-radius: 6px;
	font-family: Verdana,Tahoma;
}
a {
	font-size: 11px;
	text-decoration: none;
	font-weight: bold;
	color: #009;
}
a:visited {
	text-decoration: underline;
}
a:hover {
	background-color: #0cf;
}
a:active {
	background-color: #0cf;
}
p.intro {
	width: auto;
}
h1 {
	margin-bottom: 5px;
	text-align: left;
	font-size: 16px;
}
h2 {
	margin-bottom: 5px;
	text-align: left;
	font-size: 15px;
}
.h2 {
	margin-bottom: 5px;
	text-align: center;
	font-size: 15px;
}
h3 {
	margin-bottom: 10px;
	font-size: 14px;
}
h4 {
	font-size: 14px;
}
p {
	margin-bottom: 20px;
	font-size: 13px;
	margin-left: 0;
}
.right {
	border-style: solid;
	border-color: inherit;
	border-width: 1px;
	float: right;
	margin: 0 0 5px 5px;
	height: 254px;
}
.left {
	border-style: solid;
	border-color: inherit;
	border-width: 1px;
	float: right;
	margin: 0 0 5px 5px;
}
#wrapper {
	overflow: auto;
	margin: 10px auto;
	padding: 15px;
	width: 892px;
	border: 1px solid #333;
	border-radius: 4px;
	background-color: #dcdcdc;
}
#main {
	float: right;
	
}
#main > header {
	height: 125px;
}
#logo {
	padding: 5px 0;
	text-align: center;
}
#main > header > nav {
	margin-top: 12px;
	height: 25px;
	border: 1px solid #333;
	border-radius: 4px;
	background-color: #B9DCFF;
	text-align: center;
}
#main > header > nav > div {
	display: inline-block;
	padding: 0 4px;
	word-spacing: 3px;
	text-align: center;
}
#main > header > nav > div a {
	color: #000000;
	font-size: 13px;
	text-align: center;
	line-height: 25px;
	word-spacing: 3px;
}
#content {
	padding: 20px;
	border: 0px solid #333;
	border-radius: 3px;
	background-color: #dcdcdc;
}
#cols {
	overflow: auto;
}
#cols > div {
	width: 266px;
}
#cols div p:last-child {
	margin-bottom: 0;
}
#cols img {
    border: 1px solid #000;
    max-width: calc(100% - 2px);
}
#cols > div:first-child {
	float: left;
}
#cols > div:last-child {
	float: right;
}
.bilder-center {
	text-align: center;
}
.google-maps {
	text-align: center;
}
.google-maps > div {
	margin-bottom: 20px;
}
.google-maps a {
	font-size: 10px;
	font-weight: normal;
	color: #000;
}
#logo-rechts {
	left: 5px;
	padding-top: 5px;
	width: 180px;
}
#wrapper > aside {
	float: left;
	padding-top: 5px;
	width: 180px;
}
#wrapper > aside > * {
	padding: 3px;
	width: 168px;
	background-color: #dcdcdc;
	border: 0px solid #333;
	border-radius: 6px;
}
#wrapper > aside > nav {
	margin-bottom: 5px;
}
#wrapper > aside > nav li {
	margin-bottom: 5px;
	list-style-type: none;
	line-height: 12px;
}
#wrapper > aside > nav li:last-child {
	margin-bottom: 0;
}
#wrapper > aside > div.extra {
	min-height: 30px;
	text-align: center;
}
@media (max-width:1000px){
#wrapper {
	margin: 0;
	width: auto;
	border: none;
}
#main {
	margin-left: 180px;
	width: auto;
}
#wrapper > aside {
	position: absolute;
}
}
@media (max-width:840px){
#main {
	float: none;
	margin-left: 0;
}
#wrapper > aside {
	position: static;
	float: none;
	margin-top: 10px;
	padding-top: 0;
	width: auto;
}
#wrapper > aside > * {
	width: auto;
}
#wrapper > aside > nav {
	text-align: center;
}
#wrapper > aside > nav li {
	display: inline-block;
}
#wrapper > aside > div.extra {
	display: none;
}
}
@media (max-width:640px){
#main > header {
	height: 145px;
}
#main > header > nav {
	height: 42px;
}
#main > header > nav > div {
	display: block;
}
.right {
	float: none;
	margin: 0 0 20px 0;
}
#cols > div {
	width: auto;
	float: none;
	text-align: center;
}
.google-maps > div {
	position: relative;
	padding-bottom: 75%;
	height: 0;
	overflow: hidden;
}
.google-maps > div > iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100% !important;
	height: 100% !important;
}
}
@media (max-width:480px){
#main > header {
	height: auto;
}
#logo img {
	width: 100%;
}
#main > header > nav {
	margin-bottom: 6px;
	height: 145px;
}
#main > header > nav > div > a {
	display: block;
}
#main > header > nav > div:first-child {
	height: 94px;
}
#main > header > nav > div:last-child {
	height: 50px;
}
a {
	font-size: 18px;
	text-decoration: none;
	font-weight: bold;
	color: #009;
}
a:visited {
	text-decoration: underline;
}
a:hover {
	background-color: #0cf;
}
a:active {
	background-color: #0cf;
}
h1 {
	margin-bottom: 20px;
	text-align: center;
	font-size: 18px;
}
h3 {
	margin-bottom: 10px;
	font-size: 16px;
}
h4 {
	font-size: 16px;
}
p {
	margin-bottom: 20px;
	font-size: 16px;
}
#main > header > nav {
	height: 185px;
}
#main > header > nav > div a {
	font-size: 16px;
	line-height: 28px;
}
}
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/web137/html/Ferienwohnung/responsive.css:1) in <b>Unknown</b> on line <b>0</b><br />