body {
  margin: 0px;
  padding: 0px;
}

#baner {
  background-color: #829EB9;
  height: 50px;
  font-family: arial;
  text-align: center;
  padding: 20px;
}

#lewy {
  background-color: #B3C6D9;
  height: 600px;
  width: 25%;
  float: left;
}

#prawy {
  background-color: #E0E9F1;
  height: 600px;
  width: 75%;
  text-align: center;
  float: left;
}

#stopka {
  background-color: #829EB9;
  font-family: arial;
  text-align: right;
  clear: both;
  padding: 20px;
}

img {
  margin: 30px;
  padding: 10px;
  border: 2px dashed #B3C6D9;
}

table {
  margin: 30px;
  border: 2px solid black;
  width: 70%;
  border-collapse: collapse;
}

td,
th {
  padding: 10px;
  border: 1px solid black;
}

tr:hover {
  color: white;
  background: blue;
}