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

html,body,h1,h2
{
  margin:0;
  padding:0;
}

body
{
  font-family: Arial, Helvetica, sans-serif;
  font-size:16px;
}

.container
{
  display:flex;
  flex-direction:column;
  align-items: center;
  justify-content:center;
  height: 100%;
}

.green
{
  color:green;
}

.red
{
  color:red;
}

.blue
{
  color:blue;
}

.italic
{
  font-style: italic;
}

.title
{
  font-size:3em;
  font-weight: normal;
}

.subtitle
{
  font-size:1.5em;
  font-weight: normal;
  color:grey;
}