.custom-select-mahasiswa2 {
   border: 1px solid #ced4da;
   border-radius: .25rem;
   width: 100%;
   height: calc(2.25rem + 2px);
   padding: .375rem .75rem;
   font-size: 1rem;
   line-height: 1.5;
   color: #495057;
   background-color: #fff;
   background-clip: padding-box;
   transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.custom-list-group {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    float: left;
    min-width: 10rem;
    padding: .5rem 0;
    margin: .125rem 0 0;
    font-size: 1rem;
    color: #495057;
    text-align: left;
    list-style: none;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0,0,0,.15);
    border-radius: .25rem;
    box-shadow: 0 .5rem 1rem rgba(0,0,0,.175);
}

.custom-list-group .custom-list-item {
    padding: .75rem 1.25rem;
    margin-bottom: -1px;
    background-color: #fff;
    border: 1px solid rgba(0,0,0,.125);
}


/* Image Modal/Lightbox */
.image-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

.modal-image {
    display: block;
    margin: auto;
    max-width: 90%;
    max-height: 90%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: #ccc;
}

.image-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 10px 20px;
    border-radius: 5px;
    max-width: 80%;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsiveness */
@media (max-width: 768px) {
    .modal-image {
        max-width: 95%;
        max-height: 85%;
    }

    .close-modal {
        font-size: 30px;
        top: 10px;
        right: 20px;
    }
}