body {
    font-family: 'Segoe UI', sans-serif;
    background: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 400px;
}

h1 {
    margin-bottom: 20px;
    font-size: 28px;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 10px;
    font-size: 16px;
}

button:hover {
    background-color: #0056b3;
}

#fileList {
    list-style: none;
    padding: 0;
    margin-top: 15px;
    text-align: left;
    font-size: 14px;
    max-height: 120px;
    overflow-y: auto;
}

#fileList li {
    background: #f9f9f9;
    padding: 5px 10px;
    margin-bottom: 5px;
    border-radius: 5px;
}