Style to hide ribbon. title area and left navigation

<style type="text/css">
#s4-titlerow {
 DISPLAY: none !important
}
#RibbonContainer-TabRowLeft {
 DISPLAY: none !important
}
.ms-cui-tts {
 DISPLAY: none !important
}
.s4-ca {
 MARGIN-LEFT: 0px
}
#s4-leftpanel
{
DISPLAY: none
}
</style>