.input_err{
background-color: red;
}
.wjy{
font-size:20px;
color:brown;
background-color: hotpink}
body{
/*display: flex;
flex-wrap: wrap;
flex-direction: row;*/
display: grid;
grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
div{
margin: 2px;
}
.outside{
border: solid 4px rgb(207, 111, 111);
width:100px;
height: 100px;
}
.inside{
border: solid 4px greenyellow;
width:50px;
height: 50px;}