<style>
body {s
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  width:70%;
  background-position: right bottom;
  background-repeat: repeat-x;
  background-image: url('tehlovy-obklad-polikliniky-tehelna'.jpg);
  background-attachment: fixed;
}

.topnav {
  overflow: hidden;
  background-color: red;
}

.topnav a {
  float: left;
  display: block;
  color: black;
  font-weight:bold;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: white;
  color: black;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}

body {
    font-family:Arial;verdana;
	margin:auto;
    width:60%;
	line-height: 1.5em;
	}

	h1{
	font-size:138.5%;
	color:red;
	}
	
	h2
	{font-size:123.1%;
	}
	
	h3
	{font-size:108%;
	}
	
	h1,h2,h3{margin:1em 0;}
	
	h1,h2,h3,h4,h5,h6,strong{font-weight:bold;}
	
	p
	{font-size:85%;
	}
	
	.social-icon-bar {
  top: 30%;
  right:5%;
  position: fixed;
}
@media screen and (max-width: 768px) {
 .social-icon-bar {
  top: 30%;
  right:1%;
  width: 5%;
  position: fixed;
  }
  }
.social-icon-bar a {
  padding: .4em;
  text-align: center;
  display: block;
  font-size: .7em;
  color: white;
  text-decoration: none;
}
@media screen and (max-width: 768px) {
 .social-icon-bar a {
  padding: .91em 0.12em;
  text-align: center;
  display: block;
  font-size: 0.5em;
  color: white;
  text-decoration: none;
  
}
  }
.social-icon-bar a:hover {
  background-color: #000000;
}
.facebook {
  background: #3b5998 none repeat scroll 0% 50%;
  color: white;
}
</style>
