/* Loading Spinner Styles */
.image-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    width: 40px;
    height: 40px;
}

.image-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.image-loading.hidden {
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.image-container {
    position: relative;
    display: inline-block;
}

.mountain-img {
    position: relative;
}

.card, .card a, .card .logo, .mountain-img, .image-container {
    position: relative;
}

.card img {
    transition: opacity 0.3s ease;
    opacity: 0;
}

.card img.loaded {
    opacity: 1;
}

.card img:not(.loaded) {
    opacity: 0;
}

.card-img-top {
    transition: opacity 0.3s ease;
    opacity: 0;
}

.card-img-top.loaded {
    opacity: 1;
}