JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="content">
    <h2>Ticket System <span style="color:#339933; font-weight:bold;">Open</span> Customer Ticket List</h2>
    <a class="BlueButton" href="ticket_view_cust_ticket.php">Open Customer Tickets</a>
    <a class="BlueButton" href="ticket_view_cust_ticket_rejected.php">Rejected Customer Tickets</a>
    <div class="centerContent">
      There are currently no open customer tickets
    </div>
  </div>
</div>

CSS

html,body
{
    height: 100vh;
}

body
{
   display: table; 
   margin: 0 auto;
   font-family: Tahoma,Arial,Sans-Serif;
}

.container
{  
  height: 98vh;
  vertical-align: middle;
	width: 70vw;
	min-width:1024px;
	margin-left:auto;
	margin-right:auto;
	margin-top: 1vh;
	display: flex;
	flex-direction: column;
}

.content
{
	background-color: #ff0000;
	flex: auto;
    flex-direction: column;
	flex-shrink: 0;
	text-align: center;
	font-size: 12px;
	padding-top:20px;
	min-height:600px;
    
    display: flex; /* new */
    justify-content: center; /* new */
}

.centerContent
{
	height: 95%;
    padding: 0;
    margin: 0;
     display: flex;
    align-items: center;
    justify-content: center;
}

.BlueButton
{
	padding: 0px 10px 2px 10px;
	border-radius: 2px;
	background-color: #1175BA;
	margin: 0px 5px 0px 5px;
	text-decoration: none;
	color: #FFFFFF;
}

.BlueButton:hover
{
	padding: 0px 10px 2px 10px;
	border-radius: 2px;
	background-color: #26AB9A;
	margin: 0px 5px 0px 5px;
	text-decoration: underline;
	color: #FFFFFF;
}