@media only screen and (min-width: 640px) {
	#bk_image { float:left; width:105%; height:105%;  margin-left:-2%; }
	#floor { width:99%; margin-top:-9%; margin-left:5%;transform: perspective(1750px) rotateX(60deg) rotateZ(35deg) skewX(-5deg); }
	.floor_img25 { width:8.4%; } 
}
@media only screen and (min-width: 800px) {
	#bk_image { float:left; width:103%; height:70%; margin-left:-2%;  }
	#floor { width:81%; margin-top:-12%; margin-left:8%;transform: perspective(1750px) rotateX(63deg) rotateZ(34deg) skewX(-5deg); }
	.floor_img25 { width:9%; } 
}
@media only screen and (min-width: 960px) {
	#bk_image { float:left; width:116%; height:106%; margin-left:-7%;  }
	#floor { width:86%; margin-top:-12%; margin-left:8%; transform: perspective(1750px) rotateX(63deg) rotateZ(34deg) skewX(-5deg);}
	.floor_img25 { width:8.9%; } 
}
@media only screen and (min-width: 1024px) {	
	#bk_image { float:left; width:103%; height:67%; margin-left:-2%;  }
	#floor { width:88%; margin-top:-12%; margin-left:8%;transform: perspective(1750px) rotateX(62deg) rotateZ(34deg) skewX(-5deg); }
	.floor_img25 { width:8.9%; } 
}
@media only screen and (min-width: 1280px) {
	#bk_image { float:left; width:103%; height:103%;margin-left:-2%;   }
	#floor { width:81%; margin-top:-12%; margin-left:8%; transform: perspective(1750px) rotateX(63deg) rotateZ(34deg) skewX(-5deg);}
	.floor_img25 { width:9%; } 
}
@media only screen and (min-width: 1824px) {
	#bk_image { float:left; width:103%; height:103%; margin-left:-2%;  }
	#floor { width:81%; margin-top:-12%; margin-left:8%; transform: perspective(1750px) rotateX(63deg) rotateZ(34deg) skewX(-5deg);}
	.floor_img25 { width:9%; } 
}
@media only screen and (min-width: 2560px) {
	#bk_image { float:left; width:103%; height:96%;margin-left:-2%; }
	#floor { width:79%; margin-top:-12%; margin-left:8%; transform: perspective(1750px) rotateX(55deg) rotateZ(35deg) skewX(-5deg);}
	.floor_img25 { width:9%; } 
}