Styling issues with ReactJS - html

Question

I am having trouble with the styling of my webpage. I am using create-react-app repo for my react boilerplate and react-bootstrap repo for my react bootstrap.
Whenever I use a <p></p> in my page, it centers the text for me and I can't find any parent div that has this sort of styling for the paragraph in my code. Here's the code for the page.
class App extends Component {
render() {
return (
<div>
<div className="container">
<div className="col-lg-12">
<div className="col-lg-5">
<img className="img-responsive img-circle" src="http://placehold.it/120x120" alt=""/><br />
<h3 className="lead text-justify text-white">
Gulshan Jubaed Prince<br />
<span>Partner, Techynaf</span>
</h3>
<p>Test paragraph.</p>
</div>
<div className="col-lg-7"></div>
<div className="col-lg-3">
<div className="well"></div>
</div>
</div>
</div>
</div>
);
}
And here's the output on the web browser. I have added box borders in my style sheet for debugging purposes.
.container - white box
h3 - yellow box
h3 span - green box
h3 + p - red box
Note that the paragraph (enclosed in red border) is displayed outside of the .container div (enclosed with white box) even though the .container is containing the <p></p> tags.
And here's the styling for the box borders (might not be important for the question):
h3 span{
font-size: 17px;
font-weight:lighter;
color: #CCC;
font-style: italic;
border: 1px solid green;
}
.container{
border: 2px solid white;
}
h3 {
border: 1px solid yellow;
}
h3 + p {
border: 1px solid red;
}
I want the Test Paragraph to be inside the .container div and right underneath the text Parter Techynaf

Answer 1

Please include
clear:both;
float:left;
in your css

Answer 2

Please try this:
.container{
overflow:hidden;
}