.file-input-zone {
    display: inline-block;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
}

    .file-input-zone:hover {
        box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
    }

    .file-input-zone input[type=file] {
        position: absolute;
        width: 100%;
        height: 100%;
        opacity: 0;
        cursor: pointer;
    }

.button-grid div.row {
    margin-top: 0.5rem;
}

div.card {
    margin-bottom: 2rem;
}