body
{
    margin:0;
}
.list
{
  padding:2px;
  width:100%;
}

.list-item
{
  padding:2px;
  width:100%;
  margin:2px;
  background-color:#ccc;
  &:nth-child(2)
  {
      background-color:yellow;
  }
}

.list-2 .list-item
{
    &:nth-child(2)
    {
        position:sticky;
        top:20px;
    }
}

.list-3 
{
    position:relative;
    .list-item
    {
        &:nth-child(2)
        {
            position:absolute;
            top:20px;
            background-color:red;
        }
    }
}

.list-1 .list-item
{
    &:nth-child(2)
    {
        position:relative;
        top:10px;
        left:10px;
    }
}

.list-5 
{
  margin:0;
  padding:0;
  .list-item
  {
    display: inline-block;
    width: calc(25% - 4px);
    margin: 0;
    box-sizing: border-box;
    padding: 5px;
    border: solid 1px blue;
    margin: 2px;
  }
}

.box
{
  display:block;
  background-color:#ccc;
  position:absolute;
  //top:-1000px;
  left:0;
}

.box-2
{
  display:block;
  background-color:#ccc;
  position:fixed;
  //top:-1000px;
  left:230px;
}

.cols
{
    padding:2px;
    background-color: blue;
    //hack "clearfix"
    display: table;
    width: 100%;
    box-sizing: border-box; 
    .col1
    {
        float:right;
        background-color:yellow;
    }
    .col2
    {
        float:left;
        background-color:green;
    }
}

.button
{
    display:inline-block;
    border:solid 1px blue;
    color:blue;
    background-color: white;
    height:40px;
    padding:0px 10px;
    margin:2px;
    line-height:40px;
    box-sizing:border-box;
}

.conteneur
{
    height:30vh;
    background-color:#ccc;
    display:table-cell;
    vertical-align:middle;
    .contenu{
        margin:5px;
        background-color:white;
    }
}

.conteneur-2
{
    border-top:1px solid black;
    height:30vh;
    background-color:#ccc;
    position:relative;
    .contenu{
        position:absolute;
        margin:5px;
        background-color:white;
        top:50%;
        transform: translateY(-50%);
    }
}