It is best that you define separate classes in your CSS, and
then change HTML markup.
#header h1 {
position: absolute;
z-index: 1;
width: 100%;
top: 100px;
left: 0;
font-size: 3.3em;
color: #fff;
text-align: center;
letter-spacing: -2px;
}
#header h2 {
position: absolute;
z-index: 1;
width: 100%;
top: 100px;
left: 0;
font-size: 2.3em;
color: #fbb;
text-align: center;
letter-spacing: -2px;
}