#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

#loader img {
    max-width: 150px;
    margin-bottom: 20px;
}

/* Carrusel de imágenes de fondo para login */
.background-slideshow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
}

.background-slideshow img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s;
}

.background-slideshow img.active {
    opacity: 1;
}

.d-flex.flex-column.flex-root {
    position: relative;
    z-index: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 158, 247, 0.3);
    transition: all 0.3s ease;
}

.image-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}