html, body {
    margin: 0;
    padding: 0;
    border: 0;
    background-color: white;
    color: black;
    font-size: 16px;
    font-family: Arial, Helvetica, sans-serif;
}

h1 {
    margin: 0;
    padding: 0;
}

fieldset {
    margin-top: .5em;
}

.menu {
    margin: 0 0 20px 20px;
    padding: 0;
    list-style-type: disc;
}

.menu li {
    margin: 0;
    padding: 0 .4em;
}

#result, #query {
    margin-top: 1em;
}

#error {
    margin-top: 1em;
    color: red;
    font-weight: bold;
}

#input, #output {
    margin-top: .5em;
    padding: 5px;
    white-space: pre;
    border-radius: 10px;
    border: 1px dashed gray;  
    background: #f5f5f5;
}

.form {
    padding: 20px 30px;
}

fieldset.disabled {
    color: gray;
    overflow: hidden;
    height: 2em;
}

.form__item {
    padding-top: .5em;
}

.form__item_required {
    font-weight: bold;
}

#submit {
    font-size: 18px;
}