Add a Css Style to a Live script file in Wordpress

I'm new to making custom changes in wordpress. I have a script file, which needs to change its position and design, once the user clicks on the button.

```
<script>

(function (w,d,s,o,f,js,fjs) {
w['ReachifyLiveChat']=o;w[o] = w[o] || function () { (w[o].q = w[o].q || []).push(arguments) };
js = d.createElement(s), fjs = d.getElementsByTagName(s)[0];
js.id = o; js.src = f; js.async = 1; fjs.parentNode.insertBefore(js, fjs);
}(window, document, 'script', 'rlc', 'https://s3-us-west-2.amazonaws.com/domain-live-chat/main.js'));

rlc({
"id": "dcms",
"name": "TOBB",
"primaryColor": "#6cc7ff",
"secondaryColor": "#9e86ff",
"popupDelay": 1000,
"requestDetailsDelay": 120000,
"requestDetailsOnStart": true,
"helloMessage": "Hello! How can I help you?"
});


</script>
```

Added this script file for a live chatbot from Reachify.io.
The code was added to the header of the wordpress, using 'Insert Header and Footer' plugin.

Once I added it, the layout is breaking of the pop-up when is opened. I'd have to add the following style lines to the script code. Is this possible?

```
.dnwUpt {
position: inherit;
margin-top: 100px;
};
```

This is how it looks now, without the style.

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This is how I want it to appear like -

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Please help me with the script code edit.