html form and css: cannot center items

alignment, center, css, forms, html

Solution

Set `display: block;` to `#formLogin` and `#btn`

#formLogin {
    margin: auto;
    width: 60%;
    display: block;
}
#rectLogin {
  margin: auto;
  width: 60%;
  border-style: solid;
  border-width: 1px;
}

#formLogin {
  margin: auto;
  width: 60%;
  display:block;
}

#btn {
  margin: auto;
  display:block;
  width: 200px;
}
<div id="rectLogin">
  <form id="formLogin">
    <div>
      <label>Username</label>
      <fieldset>
        <input type="text" name="username" required>
      </fieldset>
      <label>Password</label>
      <fieldset>
        <input type="password" name="password" required>
      </fieldset>
      <input id="btn" type="submit" value="Login">
    </div>
  </form>
</div>

Problem

I have some troubles to center items in html form. A very simple example here: https://jsfiddle.net/a9cnuypz/ ``` #rectLogin { margin: auto; width: 60%; border-style: solid; border-width: 1px; } #formLogin { margin: auto; width: 60%; display: inline-block; } #btn { margin: auto; display: inline-block; width: 200px; } ``` ``` <div id="rectLogin"> <form id="formLogin"> <div> <label>Username</label> <fieldset> <input type="text" name="username" required> </fieldset> <label>Password</label> <fieldset> <input type="password" name="password" required> </fieldset> <input id="btn" type="submit" value="Login"> </div> </form> </div> ``` Here is how appears now: and here how I want: I don't understand my mistake. I set for the relevant items (form and button) both a width and margins=auto.

Original source

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