body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

button {
    display: block;
    width: 100%;
    padding: 10px;
    margin: 20px 0;
    border: none;
    background-color: #28a745;
    color: #fff;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
}

button:disabled {
    background-color: #ccc;
}

.progress {
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar {
    height: 20px;
    background: #28a745;
    transition: width 0.3s;
}

.status-message {
    text-align: center;
    margin-top: 10px;
    color: #333;
}