div.header_box{
  height: 650px;
  position: relative;
  background: url('img/header.jpg') right top no-repeat;
  background-size: contain;
}

div.header_image{
  position: relative;
  height: 0;
  padding: 0; 
}

div.header_box div.header_text{
  padding-top: 140px;
  text-align: left;
  width: 50%;
  font-size: 16px;
  line-height: 30px;
  color: #676c74;
}

div.header_box div.header_text h1{
  font-weight: bold;
  font-size: 56px;
  line-height: 64px;
}


div.header_tlacitka{
  padding-top: 60px;
}

.vybrat_produkt{
  display: inline-block;
  margin: 0 auto;
  width: 280px;
  padding: 0 20px;
  line-height: 52px;
  font-size: 16px;
  text-transform: uppercase;
  color: #ffffff;  
  background: #000000;
  text-align: center;
  
  
  border-radius: 5px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  
  cursor: hand; cursor: pointer;
  transition: all 0.3s;
}

.vybrat_produkt:hover{
  text-decoration: none;
  background: #ecbd1a;
  color: #000000;
}

@media screen and (max-width: 1200px){
  div.header_box{
    background-size: 80% auto;
  }
}



@media screen and (max-width: 1200px) and (min-width: 901px){
  div.header_box div.header_text{    
    width: 50%;
    padding-right: 10%;
    background: linear-gradient(90deg, rgba(255,255,255,1) 0%, rgba(255,255,255,0.8) 70%, rgba(255,255,255,0) 100%); 
    height: 510px;
  }
}

@media screen and (max-width: 900px){
  div.header_box{
    background-size: 100% auto;
    height: auto;
    background-image: none !important;
  }
    
  div.header_image{
    display: block;
    height: 500px; 
    background: url('img/header_mobil.jpg') center bottom no-repeat;
    background-size: cover;
  }
  
  div.header_box div.header_text{
    width: auto;  
    text-align: center;
    padding-top: 20px; 
    padding-bottom: 20px; 
  }
  
  div.header_box div.header_text h1{
    font-size: 40px;
    line-height: 50px;
    text-align: center;
    margin-bottom: 0px;
  }
}


@media screen and (max-width: 600px){  
  div.header_box{
    background-size: 100% auto;
    height: auto;
    background-image: url('img/header_mobil.jpg');
  }
  
  div.header_image{
    padding-top: 100%;
    height: 0;
  }
  
  div.header_box div.header_text h1{
    font-size: 30px;
    line-height: 40px;
  }
 
  div.header_tlacitka{
    padding-top: 20px;
  }

  div.header_odkaz{
    float: none;
    display: inline-block;
    margin: 0px auto;
  }  
}