code:

...

.the-worst-grid-system-item.span_1_1, 
.the-worst-grid-system-item.span_1_2, 
.the-worst-grid-system-item.span_1_3, 
.the-worst-grid-system-item.span_2_3, 
.the-worst-grid-system-item.span_1_4, 
.the-worst-grid-system-item.span_2_4, 
.the-worst-grid-system-item.span_3_4, 
.the-worst-grid-system-item.span_1_5, 
.the-worst-grid-system-item.span_2_5, 
.the-worst-grid-system-item.span_3_5, 
.the-worst-grid-system-item.span_4_5, 
.the-worst-grid-system-item.span_1_6, 
.the-worst-grid-system-item.span_2_6, 
.the-worst-grid-system-item.span_3_6, 
.the-worst-grid-system-item.span_4_6, 
.the-worst-grid-system-item.span_5_6, 
.the-worst-grid-system-item.span_1_7, 
.the-worst-grid-system-item.span_2_7, 
.the-worst-grid-system-item.span_3_7, 
.the-worst-grid-system-item.span_4_7, 
.the-worst-grid-system-item.span_5_7, 
.the-worst-grid-system-item.span_6_7, 
.the-worst-grid-system-item.span_1_8, 
.the-worst-grid-system-item.span_2_8, 
.the-worst-grid-system-item.span_3_8, 
.the-worst-grid-system-item.span_4_8, 
.the-worst-grid-system-item.span_5_8, 
.the-worst-grid-system-item.span_6_8, 
.the-worst-grid-system-item.span_7_8, 
.the-worst-grid-system-item.span_1_9, 
.the-worst-grid-system-item.span_2_9, 
.the-worst-grid-system-item.span_3_9, 
.the-worst-grid-system-item.span_4_9, 
.the-worst-grid-system-item.span_5_9, 
.the-worst-grid-system-item.span_6_9, 
.the-worst-grid-system-item.span_7_9, 
.the-worst-grid-system-item.span_8_9, 
.the-worst-grid-system-item.span_1_10, 
.the-worst-grid-system-item.span_2_10, 
.the-worst-grid-system-item.span_3_10, 
.the-worst-grid-system-item.span_4_10, 
.the-worst-grid-system-item.span_5_10, 
.the-worst-grid-system-item.span_6_10, 
.the-worst-grid-system-item.span_7_10, 
.the-worst-grid-system-item.span_8_10, 
.the-worst-grid-system-item.span_9_10 {
	width: 100%;
}

...


@media all and (min-width: 640px) {

/*------(the-worst-grid-system) DEFAULTS------*/

.the-worst-grid-system-item.span_1_1 {width:100%;}
.the-worst-grid-system-item.span_1_2 {width:50%;}
.the-worst-grid-system-item.span_1_2 {*width:49.5%}
.the-worst-grid-system-item.span_1_3 {width:33.33%;}
.the-worst-grid-system-item.span_2_3 {width:66.66%;}
.the-worst-grid-system-item.span_1_4 {width:25%;}
.the-worst-grid-system-item.span_2_4 {width:50%;}
.the-worst-grid-system-item.span_3_4 {width:75%;}
.the-worst-grid-system-item.span_1_5 {width:20%;}
.the-worst-grid-system-item.span_2_5 {width:40%;}
.the-worst-grid-system-item.span_3_5 {width:60%;}
.the-worst-grid-system-item.span_4_5 {width:80%;}
.the-worst-grid-system-item.span_1_6 {width:16.66%;}
.the-worst-grid-system-item.span_2_6 {width:33.33%;}
.the-worst-grid-system-item.span_3_6 {width:50%;}
.the-worst-grid-system-item.span_4_6 {width:66.66%;}
.the-worst-grid-system-item.span_5_6 {width:83.33%;}
.the-worst-grid-system-item.span_1_7 {width:14.28%;}
.the-worst-grid-system-item.span_2_7 {width:28.57%;}
.the-worst-grid-system-item.span_3_7 {width:42.85%;}
.the-worst-grid-system-item.span_4_7 {width:57.14%;}
.the-worst-grid-system-item.span_5_7 {width:71.42%;}
.the-worst-grid-system-item.span_6_7 {width:85.71%;}
.the-worst-grid-system-item.span_1_8 {width:12.5%;}
.the-worst-grid-system-item.span_2_8 {width:25%;}
.the-worst-grid-system-item.span_3_8 {width:37.5%;}
.the-worst-grid-system-item.span_4_8 {width:50%;}
.the-worst-grid-system-item.span_5_8 {width:62.5%;}
.the-worst-grid-system-item.span_6_8 {width:75%;}
.the-worst-grid-system-item.span_7_8 {width:87.5%;}
.the-worst-grid-system-item.span_1_9 {width:11.11%;}
.the-worst-grid-system-item.span_2_9 {width:22.22%;}
.the-worst-grid-system-item.span_3_9 {width:33.33%;}
.the-worst-grid-system-item.span_4_9 {width:44.44%;}
.the-worst-grid-system-item.span_5_9 {width:55.55%;}
.the-worst-grid-system-item.span_6_9 {width:66.66%;}
.the-worst-grid-system-item.span_7_9 {width:77.77%;}
.the-worst-grid-system-item.span_8_9 {width:88.88%;}
.the-worst-grid-system-item.span_1_10 {width:10%;}
.the-worst-grid-system-item.span_2_10 {width:20%;}
.the-worst-grid-system-item.span_3_10 {width:30%;}
.the-worst-grid-system-item.span_4_10 {width:40%;}
.the-worst-grid-system-item.span_5_10 {width:50%;}
.the-worst-grid-system-item.span_6_10 {width:60%;}
.the-worst-grid-system-item.span_7_10 {width:70%;}
.the-worst-grid-system-item.span_8_10 {width:80%;}
.the-worst-grid-system-item.span_9_10 {width:90%;}

/*------END the-worst-grid-system DEFAULTS------*/


#respond .the-worst-grid-system-item.span_1_8 {width:50%;}

}