.btn-stmp {
    background-color:#A6A6A6;
}
/* Stato Normale */
.btn-stmp {
    color: white;
    background-color: #A6A6A6;
    border-color: #7F7F7F;
}

/* Hover (Passaggio del mouse) */
.btn-stmp:hover {
    color: lightgray;
    background-color: #A6A6A6;
    border-color: #7F7F7F;
}

/* Focus (Selezione tramite tastiera/click) */
.btn-stmp:focus {
    color: white;
    background-color: #A6A6A6;
    border-color: #7F7F7F;
    box-shadow: 0 0 0 0.25rem rgba(217, 164, 6, 0.5);
}

/* Active (Quando viene cliccato) */
.btn-stmp:active, .btn-stmp.active {
    color: white;
    background-color: #A6A6A6;
    border-color: #7F7F7F;
}

.btn-stmp:active:focus {
    box-shadow: 0 0 0 0.25rem rgba(217, 164, 6, 0.5);
}

/* Disabled (Disabilitato) */
.btn-stmp:disabled, .btn-stmp.disabled {
    color: white;
    background-color: #A6A6A6;
    border-color: #7F7F7F;
    opacity: 0.65;
}