/* Keyframes */
@keyframes pulse {
    0% {
        transform: scale(1);
        background-color: #d3d3d3;
    }
    50% {
        transform: scale(1.05);
        background-color: #f0f0f0;
    }
    100% {
        transform: scale(1);
        background-color: #d3d3d3;
    }
}

@keyframes pulse-red {
    0% {
        transform: scale(1);
        background-color: #d3d3d3;
    }
    50% {
        transform: scale(1.05);
        background-color: #e00000;
        color: #fff;
        text-shadow: #000 0 0 5px;
    }
    100% {
        transform: scale(1);
        background-color: #d3d3d3;
    }
}

/* First Visible Option */
.first-visible-option {
    font-weight: bold;
    color: #000; /* Black text */
}

/* No Book Found Option */
.no-book-found-option {
    font-weight: bold;
    color: #000; /* Black text */
}