body {margin: 0;}
body,h1,h2,h3,h4,h5 {font-family: "Poppins", sans-serif}
body {font-size:16px;}

ul.sidenav {
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 25%;
  background-color: #4d0000;
  position: fixed;
  height: 100%;
  overflow: auto;
}

ul.sidenav li a {
  display: block;
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  font-size:3vw;
}
 
ul.sidenav li a:hover:not(.active) {
  background-color: #555;
  color: white;
}

div.content {
  margin-left: 25%;
  padding: 15px;
  overflow: auto;

}

  #myBtn {display:none!important}

@media screen and (max-width: 900px) {
  ul.sidenav {
    width: 100%;
    height: auto;
    position: relative;
  }
  
  ul.sidenav li a {
    float: left;
    padding: 15px;
  }
  
  div.content {margin-left: 0;}
  
  #myBtn {display:block!important}
}

@media screen and (max-width: 500px) {
  ul.sidenav li a {
    text-align: center;
    float: none;
      font-size:15px;
  }
}

div.odsek {

  padding: 1px 16px;

}

div.glava {
  margin-left: 0px;
  margin-right: 0px;
  padding: 1px 16px;
  color: white;
  background-color:tomato;
  height: 100%;
  overflow: auto;
  text-align:center;
  font-size:5vw;
  font-family:verdana;
  background-image: url('001.jpg');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

div.noga{

  padding: 1px 16px;
  background-color: powderblue;
  color: white;
  height: auto;
  text-align:center;
  font-size:160%;
  font-family:courier;"
}

hr {
    width:90px;
    border:10px solid red; 
    border-radius: 12px;
    float: left;
    }
    
#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: red;
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 50%;
}

#myBtn:hover {
  background-color: #555;
}