/*html{
    background-color: black;
}
body{
    background-color: white;
    font-family: Arial, Helvetica, sans-serif;
    margin:0;
    background-image: url('../../img/background.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}
main{
    margin-left: 200px;
    margin-right: 200px; 
    margin-top: 50px;
    margin-bottom: 50px;
    padding: 20px;
    border: black solid 2px;
    overflow-y: scroll;
    scrollbar-color: black white;
    scrollbar-width: thin;
    height: 660px;
    background-color: white;
}*/
.error{
    color: red;
    font-weight: bold;
}
main form{
    margin: 10px;
    padding: 10px;
}
main form input{
    display: block;
    margin-top: 10px;
    border-style: none;
    border: solid black 2px;
    padding: 3px;
    background-color: white;
}
main form button{
    display: block;
    margin-top: 10px;
    border-style: none;
    border: solid black 2px;
    padding: 5px;
    background-color: white;
}
main form button:hover{
    transition: 0.3s;
    background-color: black;
    color: white;
    cursor: pointer;
}
main #frame{
    margin: 10px;
    padding: 10px;
    border: solid black 2px;
}
main #frame a{
    text-decoration: none;
    color: black;
    margin-top: 10px;
    border-style: none;
    border: solid black 1px;
    padding: 3px;
    background-color: white;
}
main #frame a:hover{
    text-decoration: none;
    transition: 0.3s;
    background-color: black;
    color: white;
}
main #frame p{
    margin-top: 10px;
    border-style: none;
    padding: 3px;
    background-color: white;
}
main div.groupbox{
    border: black solid 2px;
    margin-bottom: 20px;
}
main div h5{
    margin: 0;
    padding: 10px;
    display: block;
    background-color: black;
    color: white;
}
main div.groupbox-obsah{
    padding: 10px;
    padding-top: 0;
}
main form button{
    color: white;
    display: block;
    margin-top: 10px;
    border-style: none;
    border: solid black 2px;
    padding: 5px;
    background-color: black;
}
main form button:hover{
    transition: 0.3s;
    background-color: white;
    color: black;
    cursor: pointer;
}