h1, h4, p {
	font-family: Arial, Helvetica, sans-serif;
	}
h4, p{
	text-align: center;
	}
p.source{
	margin: 0.7rem;
	text-align: left;
	}
h4, p.end{
    margin: 40px 50px 20px 50px;
    font-size: 1.5rem;
    background: #FFFFFF;
    }
h1{
	font-weight: bold;
	}
div.box {
	display: flex;
	margin: 10px;
	justify-content: center;
  }