.error{
    color: red;
}

.single-gallery-box {
    text-align: center;
    position: relative;
    margin-bottom: 30px;
}

.single-gallery-box::before {
    width: 100%;
    content: '';
    position: absolute;
    height: 100%;
    background-color: #15a5ff;
    left: 0;
    top: 0;
    -webkit-transition: 0.5s;
    transition: 0.5s;
    opacity: 0;
    visibility: hidden;
}

.single-gallery-box .gallery-btn {
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translateY(-50%) translateX(-50%);
    transform: translateY(-50%) translateX(-50%);
    z-index: 1;
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    background-color: #ffffff;
    color: #2f2c52;
    font-size: 18px;
    margin-top: 15px;
    opacity: 0;
    visibility: hidden;
    border-radius: 50px;
}

.single-gallery-box .gallery-btn:hover {
    color: #ffffff;
    background-color: #2f2c52;
}

.single-gallery-box:hover::before {
    opacity: .85;
    visibility: visible;
}

.single-gallery-box:hover .gallery-btn {
    opacity: 1;
    visibility: visible;
    margin-top: 0;
}

.gallery-image {
    min-height: 150px; /* Adjust the value to your preferred height */
    max-height: 200px;
    width: auto;
    display: block;
    margin: 0 auto;
}

@media only screen and (max-width: 480px) {
    .gallery-image {
        max-height: 350px;
        width: 100%;
    }
}