:root {
    --button-width: 80px;
    --button-height: 80px;
}

button {
    width: var(--button-width);
    height: var(--button-height);
    border: none;
    box-sizing: border-box;
    cursor: pointer;
    pointer-events: auto;
    outline: none;
    background-color: transparent;
    padding: 0;
    color: var(--color-white);
    font-size: 18pt;
    font-family: inherit;
    user-select: none;
}