CSS Media query not working in stylesheet

Question

I have checked similar questions and what seems to be missing in their code is:

<meta name="viewport" content="width=device-width, initial-scale=1">

Now, I have this code already but CSS media query still seems not to work.

This is my style sheet:

.calculator__container {
    border: 1px solid black;
    border-radius: 3px;
    padding: 5px;
    text-align: center;
    margin-left: 40vw;
    margin-right: 40vw;
    margin-top: 25vw;
    padding-top: 40px;
    box-shadow: -9px 4px 21px -2px rgba(0,0,0,0.75);
}

#clear {
    background-color: red;
    color: white;

};

@media only screen and (max-device-width: 500px) {
    .calculator__container {
        border: 1px solid black;
        border-radius: 3px;
        padding: 5px;
        text-align: center;
        margin-left: 10vw;
        margin-right: 10vw;
        margin-top: 25vw;
        padding-top: 40px;
        color: blue;
        box-shadow: -9px 4px 21px -2px rgba(0,0,0,0.75);
    };
    #clear {
        background-color: red;
        color: pink;

    }
}

Can I get any help, please?

Answer 1

Use max-width instead of max-device-width . Device width is dependent on the width of the device, not the browser window, as such will not alter when you resize your browser window if viewed on a desktop screen at 1920 x 1080 for example as the max-device-width will remain constant at 1920px.

 .calculator__container { border: 1px solid black; border-radius: 3px; padding: 5px; text-align: center; margin-left: 40vw; margin-right: 40vw; margin-top: 25vw; padding-top: 40px; box-shadow: -9px 4px 21px -2px rgba(0,0,0,0.75); } #clear { background-color: red; color: white; } @media only screen and (max-width: 500px) {.calculator__container { margin-left: 10vw; margin-right: 10vw; color: blue; } #clear { color: pink; } }

 <meta name="viewport" content="width=device-width, initial-scale=1"> <div class="calculator__container"> Calculator container. </div> <div id="clear"> Clear. </div>

 .calculator__container { border: 1px solid black; border-radius: 3px; padding: 5px; text-align: center; width: 20vw; margin: 25vh auto 0 auto; /* top, right, bottom, left */ padding-top: 40px; box-shadow: -9px 4px 21px -2px rgba(0,0,0,0.75); } #clear { background-color: red; color: white; } @media only screen and (max-width: 500px) {.calculator__container { width: 80vw; color: blue; } #clear { color: pink; } }

 <meta name="viewport" content="width=device-width, initial-scale=1"> <div class="calculator__container"> Calculator container. </div> <div id="clear"> Clear. </div>

Answer 2

This is what worked for me. I find it weird though since I have done other projects without including the min-width :

@media only screen and (min-device-width : 320px) and (max-device-width : 480px) {

}