/* PARTE DI CODICE PER L'IMPLEMENTAZIONE DEL PULSANTE BACK-TO-TOP */

.back-to-top {
    position: fixed;
    bottom: 50px;
    right: 30px;
    background-color: var(--primary-color);
    color:white;
    text-decoration: none;
    font-size: 22px;
    padding: 8px 20px;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3 ease, transform 0.3 ease;
    z-index: 999;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* al passaggio del muouse cambia colore */
.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: scale(1.15);
}

/* renderlo visibile quando si scrolla sul sito */
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    animation: slideUp 0.5s ease-out;
}
/* effetto slideUp */
@keyframes slideUp {
    0% { transform: translateY(20px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}