html, body {height:100%; margin:0; padding:0;}

 body
 {
    background-image:url('/_layouts/15/Sp.Login.Custom2/DesignFiles/images/bg_03.png');
    background-position:50% 50%;
    background-attachment:fixed;
    background-repeat:no-repeat;
    background-size: 100% 100%;
 }

 body.ms-backgroundImage
 {
     background-image:url('/_layouts/15/Sp.Login.Custom2/DesignFiles/images/bg_03.png');
     background-size: 100% 100%;
 }
 
 #page-background {position:fixed; top:0; left:0; width:100%; height:100%;}
 
 #content {position:relative; z-index:1; padding:10px;}

.LoginTextField
{
    -moz-border-radius: 0.3em 0.3em 0.3em 0.3em;
    border: 1px solid #DDDDDD;
    margin: 0;
    padding: 2px;
    width: 160px;
}
.LoginButton
{
    -moz-border-radius: 0.3em 0.3em 0.3em 0.3em;
    line-height: 1.2;
    margin: 10px 10px 0 0;
    padding: 0 0.5em;
}

#Signin
{
    BACKGROUND-IMAGE:url(/_layouts/15/Sp.Login.Custom2/DesignFiles/images/button_f.png);
    WIDTH:115px; 
    HEIGHT:35px; 
    BACKGROUND-REPEAT:no-repeat; 
    border:0px;
    font-family:Verdana, "Times New Roman", sans-serif;
    text-align:center;
    line-height:30px;
    cursor:pointer;
}

.rounded
{
    width: 300px; 
    height: auto; 
    /*margin-top: 35%; */
    /*margin-top: 15%; */
    margin-left: 35%;
    /*background:transparent; 
    filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000,endColorstr=#99000000); 
    background-color:Gray;*/
    /*zoom: 1;*/
    position:absolute;
    top:0;
    left:0;
    z-index:1;
}