CSS media query not changing elements?

Question

I'm trying to get this media query to work... I've changed a border and element colour, and position so I can clearly see when it's worked but it doesn't seem to be applying the rule at all - what have I missed? I'm looking for spaces and typos but I can't see any...

HTML

<div id="introcontainer">
     <div id="introcontainer2">
         <div class="introbox" id="introbox1">48</div>
         <div class="introbox" id="introbox2">3</div>
         <div class="introbox" id="introbox3">£99</div>
     </div>
</div>

CSS

@media only screen and (min-width: 768px)  and (max-width: 992px) {

#introcontainer {
    width: 660px; 
    height: 134px; 
    position: absolute; left: 50%; top: 100px; 
    margin-left: -330px; border-style: dashed; border-color: red;}

.introbox {
width: 214px;
height: 130px;
background: #fffff;
opacity: 0.1;
border-radius: 4px;}
}

#introcontainer {width: 660px; height: 134px; position: absolute; left: 50%;           top: 250px; margin-left: -330px; border-style: dashed; border-color: aqua;}

#introcontainer2 {position: relative;}
.introbox {
width: 214px;
height: 130px;
background: #6666CC;
opacity: 0.5;
border-radius: 4px;
}

#introbox1 {position: absolute; left: 0px;}

#introbox2 {margin-left: auto; margin-right: auto;}
#introbox3 {position: absolute; right: 0px; top: 0px;}

Answer 1

is there a chance that you forgot to close the @media? because when I removed the:

@media only screen and (min-width: 768px)  and (max-width: 992px) {

it worked.

you can see it in this codepen. also maybe that your @media deceleration may be wrong ?

I think you should put it after your regular css, or change the min/max-width.