html {
background-color: tan;
font-family: Verdana, Geneva, Tahoma, sans-serif;
}

body {
font-size: 18px;
}

img {
    display: block;;
    position: absolute;
    left: 15%;
    z-index: -1;
}

header{
background-color: rgba(60,120,160,0.9);
color: white;
font-size: 150%;
padding: 10px;
}

#lewy {
background-color: rgba(0,100,0,0.6);
margin: 2%;
width: 75%;
height: 75%;
box-shadow:10px 10px 7px dimgray;
overflow: auto;
float: left;
}

#prawy1,#prawy2 {
background-color: rgba(0,100,0,0.6);
margin: 1%;
width: 15%;
height: 300px;
box-shadow:10px 10px 7px dimgray;
overflow: auto;
float: right;
}

footer{
background-color: rgba(60,120,160,0.9);
color: white;
font-size: 150%;
padding: 10px;
}

h1,h2 {
text-align: center;
font-style: italic;
}

dt{
    color:white;
}


li:hover,dd:hover{
background-color: lightgreen;

}