body{ color:green;
      font-family:arial,verdana,sans-serif;
      background-color:#ffffff; 
    }
#glowny { 
  text-align:center; }

h3#wazne { 
   color:red; }

div#rys {
  text-align:center;
}


#all {
  #background-color:black;
  #border:3px dashed red;
  font-size:1.4em;
}
#all:after {
        content:'';
        display:block;
        clear:both;
}

#tekst {
    float:left;
    width=50%;
    background-color:lightgreen;
}
#rysunek {
    float:left;
    width=50%;
}    

#rodzic {
  #background-color:black;
  #border:3px dashed red;
  font-size:1.4em;
}
#rodzic:after {
        content:'';
        display:block;
        clear:both;
}

#dziecko1 {
  float:left;  
  width:50%;
  background-color:lightgreen;
}

#dziecko2 {
  float:left;   
  width:50%;
  #background-color:lightgreen;
}