#obal {
    margin-top: calc(20vh - var(--nav-vyska));
}

#nadpis {
    text-align: center;
    margin-bottom: 32px;
}

form {
    width: 420px;
    margin: auto;
    margin-top: 20px;

    border: 2px solid tomato;
    border-radius: 15px;
    padding: 20px 24px;
}

.radek {
    display: flex;
    align-items: center;
    font-size: 21px;
}

.radek:not(:last-child) {
    margin-bottom: 12px;
}

label {
    width: 60%;
}

input:not([type=submit]) {
    width: 100%;
    height: 1.7em;
    font-size: 16px;
}

.label-radio {
    width: 100%;
    box-sizing: border-box;
    border: 5px solid transparent;
    border-radius: 7px;
    outline: 1px solid grey;
    text-align: center;
}

.label-radio:last-child {
    margin-left: 6px;
}

.label-radio:has(input[type=radio]:checked) {background-color: tomato;}
.label-radio:not(:has(input[type=radio]:checked)):hover {border-color: #DDD;}

.label-radio .text {
    padding: 5px 0;
}

input[type=radio] {
    display: none;
}

hr {
    margin: 20px 5px;
}

input[type=submit] {
    width: 100%;
    padding: 0.3em 4px;
    font-size: 24px;
}

.odkaz {
    margin-top: 18px;
    text-align: center;
    font-size: 14px;
}


@media only screen and (max-width: 520px) {
    form {
        width: calc(100vw - 50px);
        box-sizing: border-box;
    }

    .radek {
        flex-direction: column;
    }

    .radek label {
        width: 100%;
        font-size: 20px;
        margin-bottom: 3px;
    }

    .label-radio:last-child {
        margin-left: 0;
    }

    .odkaz {
        margin-left: 25px;
        margin-right: 25px;
    }

    input[type=submit] {
        font-size: 20px;
    }
}