html - specificity issue w/ CSS opacities: overriding the opacity of the parent div -


i have div (id=alertpanel) want put in front of div (id=captchapanel). captchapanel div has opacity of .25 -- want front alert div tp 100% opaque. (i going lightbox-like effect). both divs have ids , not in classes. assign div opacity of .25 , front div opacity of 1 -- front div still not opaque (in chrome , safari @ least... in ff , ie). making id-specific rule in simple application of css, confused why getting result.

here html: 

      <div id='captchapanel'>          <div id='alertpanel'>             in middle         </div>          //some html      </div>

here css:

    #alertpanel     {          height: 10%;         width: 10%;         margin-left: auto ;         z-index:1;         margin-right: auto ;         position: absolute;         background-color:blue;         float:none;         opacity:1 !important;     }      #captchapanel     {         height: 60%;         width: 57%;         background-color:#580200;         vertical-align:middle;         margin-left: auto ;         margin-right: auto ;         border-radius:15px;         opacity:.05;          z-index:-1;     }

a child inherit opacity of parent.

if using colors, change #captchapanel use rgba:

background-color: rgba(0,0,0,.05);

fiddle

you change markup alertpanelis not descendant ofcaptchapanel`

<div class="wrapper">     <div id='captchapanel'>//some html</div>     <div id='alertpanel'>in middle</div> </div>

fiddle 2


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