/* Sul telefono le tre colonne vanno una sotto l'altra: 1050px diventerebbe un riquadro
   altissimo che ritaglia le foto, quindi sotto i 768px l'altezza scende. */
@media (max-width: 767.98px) {
    .custom-slider-container {
        height: 500px !important;
    }
}

.custom-slider-container {
    position: relative;
    width: 100%;
    height: 1050px;
    overflow: hidden;
    background-color: #1a1a1a;
}

.slider-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: scale(1.05);
    transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
    z-index: 1;
}

    .slider-slide.active {
        opacity: 1;
        transform: scale(1);
        z-index: 2;
    }

    /* Gestisce le diverse dimensioni senza distorcere */
    .slider-slide img {
        width: 100%;
        height: 100%;
        object-fit: cover; /* Usa 'contain' se non vuoi mai ritagliare i bordi */
        object-position: center;
    }

.slider-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 20px 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
    color: #fff;
    z-index: 3;
    pointer-events: none;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    font-size: 1.2rem;
    line-height: 1;
    transition: background 0.3s;
}

    .slider-btn:hover {
        background: rgba(255, 255, 255, 0.7);
        color: #000;
    }

    .slider-btn.prev {
        left: 15px;
    }

    .slider-btn.next {
        right: 15px;
    }

.slider-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.indicator-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

    .indicator-dot.active {
        background: #fff;
        width: 22px;
        border-radius: 10px;
    }

/* Pulsante "Compra il libro" con i colori del pulsante di acquisto di Amazon
   (giallo #FFD814, testo scuro, angoli tondi): si riconosce al volo come "Amazon". */
.btn-amazon {
    display: inline-block;
    background: #FFD814;
    border: 1px solid #FCD200;
    border-radius: 20px;
    color: #0F1111 !important;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 20px;
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(213, 217, 217, 0.5);
    transition: background 0.2s;
}

    .btn-amazon:hover, .btn-amazon:focus {
        background: #F7CA00;
        border-color: #F2C200;
        color: #0F1111 !important;
        text-decoration: none;
    }

    .btn-amazon .icon-amazon {
        font-size: 18px;
        vertical-align: -2px;
        margin-right: 4px;
    }