body {
    width: 100%;
    height: 100%;
    font-size: 16pt;
    line-height: 2;
    background-color: #000;
    color: #F00;
    text-align: center;
    padding: 50px;
    margin: 0 auto;
    border: 5px double #FF0000;
    overflow: hidden;
    box-sizing: border-box;
}

h1 {
    font-size: 36px;
    font-weight: bold;
}