How to bottom align and center an responsive image in a column

Question

I have this layout (which is a header):

<div class="container-fluid">
    <div class="row">
        <div class="col-sm-2" style="background-color: aqua; height: 160px;">
            <img src="logo.png" class="img-responsive logo">
        </div>
        <div class="col-sm-8" style="background-color: blueviolet; height: 160px;"></div>
        <div class="col-sm-2" style="background-color: aqua; height: 160px;"></div>
    </div>
</div>

what i would like to achieve is:

• Align the logo to the bottom and the center
• Let the image be responsible (set width to 80% of the column)

I did this:

.logo {
  position: absolute;
  width: 80%;
  left: 10%;
  right: 10%;
  bottom: 0;
}

but it somehow dosen't work as you can see here: https://jsfiddle.net/9kauhbhs/2/

Answer 1

You can try this.. https://jsfiddle.net/9kauhbhs/7/

.container{ 
  position:absolute;
  bottom:0px;
  height:auto;
  width:100%;
  text-align:center;
}
.logo {
  position: relative;
  width: auto;
  height:auto;
  margin:0 auto;
  max-height:100%;
  vertical-align:bottom;
}


<div class="col-sm-2 text-center" style="background-color: aqua; height: 160px;">
    <div class="container">
        <img src="http://www.w3schools.com/html/pic_mountain.jpg" class="logo">
        </div>    
    </div>

Answer 2

Use left: 50% and a margin left that is negative half of the image width.

eg

.logo {
    position: absolute;
    width: 80%;
    left: 50%;
    bottom: 0;
    margin-left: calc(-80% / 2); 
}

Fiddle