body {
    color: black;
    font-size: large;
}

#kachni {
    font-weight: bold;
}
h1 {
    text-align: center;
}
h4 {
    font-weight: normal;
}
#hlavicka {
    margin: 0px;
    background-color: blue;
    color: white;
}
#hlavicka a {
    color: white;
}
abbr {
    cursor: help;
}

label::after{
    font-weight: bold;
}
input[type="radio"].yes:checked + label::after{
    color: darkgreen;
    content: "✓";
}
input[type="radio"].no:checked + label::after{
    color: red;
    content: "✘";
}
ol {
    list-style-type: lower-alpha;
    line-height: 1.1em;
}