@media only screen and (min-width: 640px) {
#bk_image { float:left; width:105%; height:105%; margin-left:-2%;  }
#floor {width:95%; margin-left:0.2%; margin-top:-8.2%; transform: perspective(1620px) rotateX(48deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }	
}
@media only screen and (min-width: 800px) {
#bk_image { float:left; width:103%; height:70%; margin-left:-2%;  }
#floor {width:95%; margin-left:0.2%; margin-top:-8.2%; transform: perspective(1620px) rotateX(48deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }	
}
@media only screen and (min-width: 960px) {
#bk_image { float:left; width:116%; height:106%; margin-left:-7%;  }
#floor {width:95%; margin-left:0.2%; margin-top:-8.2%; transform: perspective(1620px) rotateX(48deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }	
}
@media only screen and (min-width: 1024px) {	
#bk_image { float:left; width:103%; height:67%; margin-left:-2%;  }
#floor {width:95%; margin-left:0.2%; margin-top:-8.2%; transform: perspective(1620px) rotateX(48deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }	
}
@media only screen and (min-width: 1280px) {
#bk_image { float:left; width:103%; height:103%;margin-left:-2%;   }
#floor {width:95%; margin-left:0.2%; margin-top:-8.2%; transform: perspective(1620px) rotateX(48deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }	
}
@media only screen and (min-width: 1824px) {
#bk_image { float:left; width:103%; height:103%; margin-left:-2%;  }
#floor {width:95%; margin-left:0.2%; margin-top:-8.2%; transform: perspective(1620px) rotateX(48deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }
}
@media only screen and (min-width: 2560px) {
#bk_image { float:left; width:103%; height:103%; margin-left:-2%;  }
#floor {width:95%; margin-left:0.2%; margin-top:-9.2%; transform: perspective(1620px) rotateX(41deg) rotateY(1deg) rotateZ(28deg) skewX(-12deg) skewY(3deg); }
}