html, body {
    background: linear-gradient(to right, #f5f7fa, #c3cfe2);
    font-family: Arial, sans-serif;
}

.upload-container {
    max-width: 600px;
    margin: 50px auto;
}

.card {
    border: none;
    border-radius: 8px;
}

h2 {
    font-weight: 600;
    color: #333;
}

label {
    font-weight: 500;
    color: #555;
}

.form-select, .form-control {
    border-radius: 5px;
    box-shadow: none;
    transition: all 0.2s;
}

.form-select:focus, .form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    transition: background-color 0.3s;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.progress {
    height: 20px;
    border-radius: 8px;
}

.progress-bar {
    background-color: #007bff;
}

.center-image {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: auto;
    height: 150px;
    padding: 20px;
}

.download-page-borders {
    margin: 20px;
}