html, body{
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

#ostrzerzenie{
    color: red;
    font-size: 25px;
    position: absolute;
    top: 0;
    left: 0;
    margin: 10px;
    padding: 5px;
    z-index: 100;
}

#powrot {
    position: fixed;
    top: 0;
    right: 0;
    margin: 10px;
    padding: 5px;
    float: left;
    width: 150px;
    z-index: 100;
}

a{
    color: white;
    text-decoration: none;
}

a:hover{
    color: #6fd1f5;
}