header{TEXT-ALIGN:center;MARGIN:0 auto;WIDTH:100%;DISPLAY:block}header H1{FONT-FAMILY:Arial;FONT-SIZE:30px;FONT-WEIGHT:bold}header #newgamebutton{PADDING-BOTTOM:10px;BACKGROUND-COLOR:#8f7a66;MARGIN:0 auto;PADDING-LEFT:10px;WIDTH:100px;PADDING-RIGHT:10px;DISPLAY:block;FONT-FAMILY:Arial;COLOR:white;TEXT-DECORATION:none;PADDING-TOP:10px;border-radius:10px}header #newgamebutton:hover{BACKGROUND-COLOR:#9f8b77}header P{MARGIN:5px auto;FONT-FAMILY:Arial;FONT-SIZE:20px}#grid-container{POSITION:relative;PADDING-BOTTOM:50px;BACKGROUND-COLOR:#bbada0;MARGIN:5px auto;PADDING-LEFT:50px;WIDTH:460px;PADDING-RIGHT:50px;HEIGHT:460px;PADDING-TOP:50px;border-radius:10px}.grid-cell{POSITION:absolute;BACKGROUND-COLOR:#ccc0b3;WIDTH:100px;HEIGHT:100px;border-radius:6px}.number-cell{POSITION:absolute;TEXT-ALIGN:center;LINE-HEIGHT:100px;WIDTH:100px;FONT-FAMILY:Arial;HEIGHT:100px;FONT-SIZE:60px;FONT-WEIGHT:bold;border-radius:6px}