Me responsive doesn't work

Community Off Topic
1

In dont understand i used media querys to modify the size of my bouton but that doesn t work =/.
( i modify the bootstrap css off btn-default so, that why i wait to change some values)

My html

```
``` My CSS ```

#btn_1{
width:85px;
height:85px;
background:#cc0000;
font:bold 13px Arial;
border-radius:50%;
border:none;
color:#fff;

}

@media screen and (max-width: 620px){

#btn_1{
    height: 50px;
    width: 50px;
}

}

<do not remove the three backticks above>
2

i don’t understand, you don’t have any element with id btn_1. why do you use it in css?

3

oh well… i dont saw thx mate