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Centering block elements horizontally

A Pen By Mojtaba Seyedi

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HTML

            
              <main>
  <div class="center">
     من یک عنصر بلاک دوست داشتینم که اومدم وسط ;)  </div>
</main>
!

CSS

            
              body {
  background: #f06d06;
  font-family: tahoma;
  direction: rtl;
}

main {
  background: white;
  margin: 20px 0;
  padding: 10px;
}

.center {
  margin: 0 auto; /* کلید */
  width: 200px;   /* کلید */
  background: black;
  padding: 20px;
  color: white;
}
!

JS
!
999px
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Console