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

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
#fileList {
    margin-bottom: 20px;
}
#fileList a {
    display: block;
    margin-bottom: 5px;
    padding: 10px;
    background-color: #f0f0f0;
    text-decoration: none;
    color: #333;
    border-radius: 4px;
}
#fileList a:hover {
    background-color: #e0e0e0;
}

button {
    background-color: #5cb85c;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    display: block;
    margin: 10px 0;
}

button:hover {
    background-color: #4cae4c;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    border-radius: 8px;
    position: relative;
}

.close {
    color: #aaa;
    position: absolute;
    top: 0;
    right: 10px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

#uploadForm input[type="file"] {
    margin-bottom: 15px;
    display: block;
}

#uploadMessage {
    margin-top: 10px;
}