*,:before,:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{font-family:var(--chat-font,"Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif);color:#1a2332;-webkit-font-smoothing:antialiased;background:#e9eef5}button,input,textarea,select{font:inherit}