html, body{
    margin-left: 10%;
    margin-right: 10%;
    background-color: brown;
    font-family: Georgia, 'Times New Roman', Times, serif;
}

.velikost{
    width:100%;
    height:100%;
}

.fotka-a{
    height:40vw;

}

.sekce{
    margin-top: 20px;
    margin-bottom: 20px;
    width:100%;
    height:100%;
}

.fotka-P{
    float:left;
    width:50%;
    height:100%;
}