body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    margin-bottom: 20px;
}

label, #gdpsSelect, #fileInput {
    display: block;
    margin: 10px auto;
}

#uploadButton, .list-link {
    display: block;
    margin: 10px auto;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    text-decoration: none;
}

#fileList {
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
}

th {
    background-color: #4CAF50;
    color: white;
}

.list-link {
    margin-top: 20px;
}