button[data-collapsible-id*="availability"] {
    font-size: 0 !important;
}
button[data-collapsible-id*="availability"]::before {
    content: "ΔΙΑΘΕΣΙΜΟΤΗΤΑ";
    font-size: 13px !important;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
button[data-collapsible-id*="price"] {
    font-size: 0 !important;
}
button[data-collapsible-id*="price"]::before {
    content: "ΤΙΜΗ";
    font-size: 13px !important;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}