css - Can't align p inside div with margin 0 auto -

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i don't know going on can't align <p> inside div margin:0 auto; can't understand wrong or i'm missing, code:

<div class="test">     <p>text has centered</p> </div>

this css

 .test   {      width: 100%;       margin: 0 auto;      max-width: 600px;      text-align:center;      background-color: #ececec;    }  .test p   {      display:inline-block;   }

with this, text moved little bit on center of div it's not centered

 .test p {   text-align: center; }

that's need.

if centering block element need margin:auto


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