@media only screen and (min-width: 640px) {
#bk_image { float:left; width:103%; height:109%; margin-left:-2%;  }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-4deg) rotateZ(55deg) skewX(1deg) skewY(-17deg); width:90%;  }	
}
@media only screen and (min-width: 800px) {
#bk_image { float:left; width:103%; height:70%; margin-left:-2%;  }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-4deg) rotateZ(55deg) skewX(1deg) skewY(-17deg); width:90%;  }	
}
@media only screen and (min-width: 960px) {
#bk_image { float:left; width:116%; height:106%; margin-left:-7%;  }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-4deg) rotateZ(55deg) skewX(1deg) skewY(-17deg); width:90%;  }	
}
@media only screen and (min-width: 1024px) {	
#bk_image { float:left; width:103%; height:67%; margin-left:-2%;  }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-4deg) rotateZ(55deg) skewX(1deg) skewY(-17deg); width:90%;  }	
}
@media only screen and (min-width: 1280px) {
#bk_image { float:left; width:103%; height:103%;margin-left:-2%;   }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-4deg) rotateZ(55deg) skewX(1deg) skewY(-17deg); width:90%;  }	
}
@media only screen and (min-width: 1824px) {
#bk_image { float:left; width:103%; height:103%; margin-left:-2%;  }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-9deg) rotateZ(51deg) skewX(1deg) skewY(-9deg); width:90%;  }
}
@media only screen and (min-width: 2560px) {
#bk_image { float:left; width:103%; height:103%; margin-left:-2%;  }
#floor {transform: perspective(1920px) rotateX(40deg) rotateY(-9deg) rotateZ(51deg) skewX(1deg) skewY(-9deg); width:90%;  }
}