.main {  
    width: 100%;  
    border: 1px solid #000;  
}  
.main div   {  
    width: 80%;  
    border: 1px solid #FF0000;  
    margin: 0 auto;  
}  
button.css3button{
        font-family: Arial, Helvetica, sans-serif;
        font-size: 14px;
        color: #ffffff;
        padding: 10px 20px;
        background: -moz-linear-gradient(
                top,
                #a3a3a3 0%,
                #3b3b3b 50%,
                #242424 50%,
                #000000);
        background: -webkit-gradient(
                linear, left top, left bottom,
                from(#a3a3a3),
                color-stop(0.50, #3b3b3b),
                color-stop(0.50, #242424),
                to(#000000));
        -moz-border-radius: 10px;
        -webkit-border-radius: 10px;
        border-radius: 10px;
        border: 1px solid #000000;
        -moz-box-shadow:
                0px 1px 3px rgba(000,000,000,0.5),
                inset 0px 0px 1px rgba(255,255,255,0.6);
        -webkit-box-shadow:
                0px 1px 3px rgba(000,000,000,0.5),
                inset 0px 0px 1px rgba(255,255,255,0.6);
        box-shadow:
                0px 1px 3px rgba(000,000,000,0.5),
                inset 0px 0px 1px rgba(255,255,255,0.6);
        text-shadow:
                0px -1px 0px rgba(000,000,000,1),
                0px 1px 0px rgba(255,255,255,0.2);
}
.center01 {
    max-width:600px;
    margin:0 auto;
}
span {
display: inline-block;
width: 7em;
}