How to Center Radio Button

For my webpage I am using radio buttons to make tabs with content on the top of my webpage. I want the tabs to be centered in the screen. I tried to use display: flex and text-align: justify but it didn't work. Is there a simple way to center the radio buttons? Any help would be appreciated.

Here is the HTML

<body>
<div class="allTabs">
  <div class="tab">
    <input type="radio" id="tab-1" name="tab-group-1" checked>
    <label for="tab-1">Tab One</label>
      <div class="content">
         stuff 1
      </div> 
  </div>
  <div class="tab">
    <input type="radio" id="tab-2" name="tab-group-1">
    <label for="tab-2">Tab Two</label>  
    <div class="content">
       stuff 2
    </div> 
  </div> 
  <div class="tab">
    <input type="radio" id="tab-3" name="tab-group-1">
    <label for="tab-3">Tab Three</label>
    <div class="content">
       stuff 3
    </div> 
  </div>

Here is the CSS

.tabs {   
  min-height: 200px; /* This part sucks */
  clear: both;
}
.tab {
  float: left;
}
.tab label {
  background: white; 
  padding: 10px; 
  border: 1px solid #ccc; 
  margin-left: -1px; 
  position: relative;
  left: 1px;
}
.tab [type=radio] {
  display: none;   
}
.content {
  position: absolute;
  top: 28px;
  left: 0;
  background: white;
  right: 0;
  bottom: 0;
  padding: 20px;
  border-top: 4px solid #DADEDE;
  margin-top: 4px;
}
[type=radio]:checked ~ label {
  background: white;
  padding-bottom: 0px;
  border-bottom: 4px solid blue;
  margin-bottom: 5px;
  z-index: 2;
}
[type=radio]:checked ~ label ~ .content {
  z-index: 1;
}

Here is the JSFiddle https://jsfiddle.net/mk8r6kL0/

Solution

See this fiddle

Remove float:left; from your CSS for .tab and add display:inline-block;

Also, add

.allTabs {
    text-align: center;
}

to your CSS

So, the complete CSS would be as below

.allTabs {
    text-align: center;
}
.tabs {
    min-height: 200px;
    clear: both;
}
.tab {
    display: inline-block;
}
.tab label {
    background: white;
    padding: 10px;
    border: 1px solid #ccc;
    margin-left: -1px;
    position: relative;
    left: 1px;
}
.tab[type=radio] {
    display: none;
}
.content {
    position: absolute;
    top: 28px;
    left: 0;
    background: white;
    right: 0;
    bottom: 0;
    padding: 20px;
    border-top: 4px solid #DADEDE;
    margin-top: 4px;
}
[type=radio]:checked ~ label {
    background: white;
    padding-bottom: 0px;
    border-bottom: 4px solid blue;
    margin-bottom: 5px;
    z-index: 2;
}
[type=radio]:checked ~ label ~ .content {
    z-index: 1;
}