[hidden] {
    display: none !important;
}

[clickable],
input[type='submit'] {
    cursor: pointer;
}

* {
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

overlay {
    position: fixed;
    z-index: 10;
    width: 100%;
    height: 100%;
    background-color: #00000022;
    display: flex;
    justify-content: center;
    align-items: center;
}

overlay > * {
    cursor: auto;
}

spacer {
    flex-grow: 1;
}