body {
    background: #f4f6fb;
}

.card {
    margin-top: 50px;
    padding: 20px;
}

#preview {

    box-shadow: 0 10px 30px rgba(0, 0, 0, .15);

}

.btn-primary {

    padding: 12px;

    font-size: 18px;

}

.upload-area {

    border: 3px dashed #0d6efd;

    border-radius: 15px;

    padding: 50px;

    text-align: center;

    background: white;

    cursor: pointer;

    transition: .3s;

}

.upload-area:hover {

    background: #eef5ff;

}

.upload-area.dragover {

    background: #dbeafe;

    border-color: #198754;

}

#preview {

    max-width: 250px;

    border-radius: 10px;

    margin-bottom: 15px;

}

.progress {

    height: 28px;

    border-radius: 30px;

    overflow: hidden;

}

.progress-bar {

    font-size: 14px;

    font-weight: bold;

}