:root {
    --color-primary: #087e8b;
    --color-on-primary: white;
}

body {
    background-color: #222;
    color: white;
    font-family: Arial, Helvetica, sans-serif;
}

form > * {
    margin-bottom: 16px;
}

fieldset {
    border-radius: 8px;
}

input,
select {
    display: block;
    width: 300px;
    background-color: #222;
    color: white;
    border: 1px solid white;
    border-radius: 8px;
    padding: 8px;
    box-sizing: border-box;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
}

button {
    border: none;
    inset: none;
    border-radius: 8px;
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    padding: 8px 16px;
}

:is(div:has(:is(input, select)), input, select)
    + :is(div:has(:is(input, select)), input, select) {
    margin-top: 8px;
}

.hidden {
    display: none;
}