html{overscroll-behavior:none}body{min-width:0}button{touch-action:manipulation}

#teach .tm{display:none}#teach{top:auto;bottom:140px;pointer-events:none}#teach .t1{font-size:12px}#teach .t2{font-size:11px}@media(max-width:400px) and (max-height:650px){#map{width:64px;height:64px}#board{font-size:10px;line-height:1.3;min-width:130px;padding:4px 6px}#feed{top:105px;font-size:10px}#teach{bottom:120px}#teach .t2{display:none}}