html
{
	height:100%;
	width:100%;
}

body
{
	height: 100%;
	width: 100%;
	margin: 0px;
	padding: 0px;
	background-color: #000;
}

.dialog
{
	position: absolute;
	left: calc(50vw - 300px);
	top: calc(50vh - 200px);
	width: 600px;
	height: 340px;
	text-align: center;
	background-color: white;
	font-family: Arial,sans-serife;
}

.dialog p
{
	font-size: 140%;
}

.dialog h1
{
	font-size: 200%;
}

.triangle-border
{
  position: relative;
  padding: 15px;
  margin: 1em 0 3em;
  border: 5px solid #fff;
  border-radius: 10px;
}

.triangle-border:before 
{
  content: "";
  position: absolute;
  bottom: -20px; /* value = - border-top-width - border-bottom-width */
  left: 40px; /* controls horizontal position */
  border-width: 20px 20px 0;
  border-style: solid;
  border-color: #fff transparent;
  /* reduce the damage in FF3.0 */
  display: block;
  width:0 ;
}

/* creates the smaller  triangle */
.triangle-border:after 
{
  content:"";
  position:absolute;
  bottom:-13px; /* value = - border-top-width - border-bottom-width */
  left:47px; /* value = (:before left) + (:before border-left) - (:after border-left) */
  border-width:13px 13px 0;
  border-style:solid;
  border-color:#fff transparent;
  /* reduce the damage in FF3.0 */
  display:block;
  width:0;
}