// boutons

Tab1 

Tab2

// contenus
Tab1 Contents 
Tab2 Contents 


// css pour cacher/montrer
input { display: none; }                /* hide radio buttons */
input + label { display: inline-block } /* show labels in line */
input ~ .tab { display: none }          /* hide contents *//* show contents only for selected tab */
#tab1:checked ~ .tab.content1,
#tab2:checked ~ .tab.content2 { display: block; }

// css pour styler

input + label {             /* box with rounded corner */
  border: 1px solid #999;
  background: #EEE;
  padding: 4px 12px;
  border-radius: 4px 4px 0 0;
  position: relative;
  top: 1px;
}
input:checked + label {     /* white background for selected tab */
  background: #FFF;
  border-bottom: 1px solid transparent;
}
input ~ .tab {          /* grey line between tab and contents */
  border-top: 1px solid #999;
  padding: 12px;
}