html - CSS Pseudo Classes apply with external CSS, Regular class won't -

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i'm attempting stylized buttons together, , keep classes i'm using in external css sheet. problem when attempt reference class in html code, pseudo classes apply , standard class not.

my html code is

<body>       <button class="buttonmodifier"></button>       <div class="buttonmodifier"></div> </body>

and within external .css sheet have:

<style>  .buttonmodifier{      background-color:rgba(102,102,102,.6);       height:50px;     width:50px;     border-radius:3px;     background-image:url(images/playerbutton.png);     }  .buttonmodifier:hover{      background-color:rgba(102,102,102,1);        background-image:url(images/playerbutton.png);  }  .buttonmodifier:active{      position:relative;     top:1px;     background-color:rgba(102,102,102,.6);    }   </style>

when go html page, class .buttonmodifier isn't applying html elements specified class, yet ":hover" , ":active" properties still apply when mouse-over or click on or on button. think .css sheet linked correctly, pseudo classes applying, yet main class ".buttonmodifier" isn't.


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