.dropzone {
    min-height: 150px;
    border: 1px solid #f1f1f1;
    background: #f4f7fa;
    padding: 20px;
    box-shadow: none;
}

.dropzone.dz-clickable .dz-message {
    cursor: pointer;
    text-align: center;
    margin: 4em 0;
}

.dz-message span {
    font-size: 18px;
}