.brgc{grid-template-columns:repeat(3,1fr);}
.brg1{grid-row:1;grid-column:1;}
.brg2{grid-row:1;grid-column:2;}
.brg3{grid-row:1;grid-column:3;}
.brgt{grid-row:2;grid-column:1/4;}
.brg4{grid-row:3;grid-column:1;}
.brg5{grid-row:3;grid-column:2;}
.brg6{grid-row:3;grid-column:3;}

@media screen and (max-width: 680px){
.brgc{grid-template-columns:repeat(2,1fr);}
.brg1{grid-row:1;grid-column:1;}
.brg2{grid-row:1;grid-column:2;}
.brgt{grid-row:2;grid-column:1/3;}
.brg3{grid-row:3;grid-column:1;}
.brg4{grid-row:3;grid-column:2;}
.brg5{grid-row:4;grid-column:1;}
.brg6{grid-row:4;grid-column:2;}
}

@media screen and (max-width: 440px){
.brgc{grid-template-columns:repeat(1,1fr);}
.brg1{grid-row:1;grid-column:1;}
.brg2{grid-row:2;grid-column:1;}
.brgt{grid-row:3;grid-column:1/2;}
.brg3{grid-row:4;grid-column:1;}
.brg4{grid-row:5;grid-column:1;}
.brg5{grid-row:6;grid-column:1;}
.brg6{grid-row:7;grid-column:1;}
}