body {
    font-family: Arial;
    background: #f3f3f3;
}

.container {
    width: 760px;
    margin: 40px auto;
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 0 10px #ddd;
}

.upload-box,
.document-list {
    margin-bottom: 20px;
}

textarea {
    width: 100%;
    height: 150px;
    padding: 10px;
    font-size: 16px;
    box-sizing: border-box;
}

button {
    margin-top: 15px;
    padding: 10px 30px;
    background: #0d6efd;
    color: white;
    border: none;
    cursor: pointer;
}

button.danger {
    background: #dc3545;
}

button:hover {
    background: #0b5ed7;
}

#loading {
    display: none;
    color: red;
    margin-top: 15px;
}

#reply,
#sources {
    margin-top: 25px;
    padding: 15px;
    background: #f8f8f8;
    border-left: 5px solid green;
    white-space: pre-wrap;
}

.alert {
    background: #e8f5e9;
    color: #1b5e20;
    padding: 10px;
    margin-bottom: 15px;
}