Columns are not holding margin - html

Question

I am working with Bootstrap 3.3.7. I cannot understand why my smaller columns are not holdning margin with the bigger columns. See the demo here.
I have a 10px margin between the columns.
Fx. there first row have the following columns: 600x410px - 600x200px 300x200px.
So 200px + 200px + 10px margin = 410 height. Therefore I gave the big column a height of 410px.
Why are they not aligning then?
/* Card and Button */
body {
background-color: #f5f5f5;
}
div {
background-color: #fff;
}
.index-content a:hover {
color: black;
text-decoration: none;
}
.index-content {
/*margin-bottom: 20px;*/
/*padding: 50px 0px;*/
}
.index-content .row {
margin-top: 20px;
}
.index-content a {
color: black;
}
.index-content .card {
background-color: #FFFFFF;
padding: 0;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
box-shadow: 0 4px 5px 0 rgba(0, 0, 0, 0.14), 0 1px 10px 0 rgba(0, 0, 0, 0.12), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
}
.index-content .card:hover {
box-shadow: 0 16px 24px 2px rgba(0, 0, 0, 0.14), 0 6px 30px 5px rgba(0, 0, 0, 0.12), 0 8px 10px -5px rgba(0, 0, 0, 0.3);
color: black;
}
.index-content .card img {
width: 100%;
border-top-left-radius: 4px;
border-top-right-radius: 4px;
height: 350px;
}
.index-content .card h4 {
margin: 20px;
}
.index-content .card p {
margin: 20px;
opacity: 0.65;
}
.index-content .blue-button {
width: 100px;
-webkit-transition: background-color 1s, color 1s;
/* For Safari 3.1 to 6.0 */
transition: background-color 0.5s, color 0.5s;
min-height: 20px;
background-color: #002E5B;
color: #ffffff;
border-radius: 4px;
text-align: center;
font-weight: lighter;
margin: 0px 20px 15px 20px;
padding: 5px 0px;
display: inline-block;
}
.index-content .blue-button:hover {
background-color: #dadada;
color: #002E5B;
}
/* GRID ELEMENTS MEDIA QUERIES */
#media (min-width: 768px) {
.card {
position: relative;
}
.card-content {
position: absolute;
bottom: 0;
width: 100%;
background: rgba(0, 0, 0, 0.5);
}
.card-content h4,
.card-content p {
color: white;
width: 100%;
float: left;
margin: 0 0 5px;
}
.card-content a {
float: right;
}
.index-content .card h4,
.index-content .card p {
padding: 15px 20px;
margin: 0;
}
.index-content .card p {
padding: 0 20px 15px;
margin: 0;
}
}
.margin_bottom{
margin-bottom:10px;
}
.row [class*="col-"]{
padding-right: 5px;
padding-left: 5px;
}
.row {
margin-left: -5px;
margin-right: -5px;
}
.card-img-bottom {
color: #fff;
height: 20rem;
background: url(images/img1.jpg) center no-repeat;
background-size: cover;
}
.img-responsive {width:100%;}
<div class="container">
<!--<h3>Grid 1</h3>-->
<div class="row">
<div class="col-sm-12">
<div class="row">
<div class="col-sm-6 margin_bottom">
<img src="http://placehold.it/600x410" alt="5" class="img-responsive"></img>
</div>
<div class="col-sm-6">
<div class="row">
<div class="col-sm-12 margin_bottom">
<img src="http://placehold.it/600x200" alt="5" class="img-responsive"></img>
</div>
</div>
<div class="row">
<div class="col-xs-6 col-sm-6">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
<div class="col-xs-6 col-sm-6">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
</div>
</div>
</div>
</div>
</div>
<!--<h3>Grid 2</h3>-->
<div class="row">
<div class="col-sm-4 margin_bottom">
<img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img>
</div>
<div class="col-sm-4">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/400x250" alt="5" class="img-responsive"></img>
</div>
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/400x250" alt="5" class="img-responsive"></img>
</div>
</div>
</div>
<div class="col-sm-4 margin_bottom">
<img src="http://placehold.it/400x510" alt="5" class="img-responsive"></img>
</div>
</div>
<!--<h3>Grid 3</h3>-->
<div class="row">
<div class="col-sm-3 margin_bottom">
<img src="http://placehold.it/300x410" alt="5" class="img-responsive"></img>
</div>
<div class="col-sm-6 margin_bottom">
<img src="http://placehold.it/600x410" alt="5" class="img-responsive"></img>
</div>
<div class="col-sm-3 margin_bottom">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
<div class=" col-xs-6 col-sm-12">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
</div>
</div>
</div>
<!--<h3>Grid 4</h3>-->
<div class="row">
<div class="col-sm-3 margin_bottom">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
<div class=" col-xs-6 col-sm-12">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
</div>
</div>
<div class="col-sm-6 margin_bottom">
<img src="http://placehold.it/600x410" alt="5" class="img-responsive"></img>
</div>
<div class="col-sm-3 margin_bottom">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
<div class=" col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive"></img>
</div>
</div>
</div>
</div>
</div>

Answer 1

Set .img-responsive { height: 100%; } instead of .img-responsive {width:100%; }. please check the below working example. hope it helps :)
and as per suggestion setting width in smaller screens: #media (max-width: 768px) { .img-responsive { width: 100%; } }
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<style>
/* Card and Button */
body {
background-color: #f5f5f5;
}
div {
background-color: #fff;
}
.index-content a:hover {
color: black;
text-decoration: none;
}
.index-content .row {
margin-top: 20px;
}
.index-content a {
color: black;
}
.index-content .card {
background-color: #FFFFFF;
padding: 0;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
box-shadow: 0 4px 5px 0 rgba(0, 0, 0, 0.14), 0 1px 10px 0 rgba(0, 0, 0, 0.12), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
}
.index-content .card:hover {
box-shadow: 0 16px 24px 2px rgba(0, 0, 0, 0.14), 0 6px 30px 5px rgba(0, 0, 0, 0.12), 0 8px 10px -5px rgba(0, 0, 0, 0.3);
color: black;
}
.index-content .card img {
width: 100%;
border-top-left-radius: 4px;
border-top-right-radius: 4px;
height: 350px;
}
.index-content .card h4 {
margin: 20px;
}
.index-content .card p {
margin: 20px;
opacity: 0.65;
}
.index-content .blue-button {
width: 100px;
-webkit-transition: background-color 1s, color 1s;
/* For Safari 3.1 to 6.0 */
transition: background-color 0.5s, color 0.5s;
min-height: 20px;
background-color: #002E5B;
color: #ffffff;
border-radius: 4px;
text-align: center;
font-weight: lighter;
margin: 0px 20px 15px 20px;
padding: 5px 0px;
display: inline-block;
}
.index-content .blue-button:hover {
background-color: #dadada;
color: #002E5B;
}
/* GRID ELEMENTS MEDIA QUERIES */
#media (min-width: 768px) {
.card {
position: relative;
}
.card-content {
position: absolute;
bottom: 0;
width: 100%;
background: rgba(0, 0, 0, 0.5);
}
.card-content h4,
.card-content p {
color: white;
width: 100%;
float: left;
margin: 0 0 5px;
}
.card-content a {
float: right;
}
.index-content .card h4,
.index-content .card p {
padding: 15px 20px;
margin: 0;
}
.index-content .card p {
padding: 0 20px 15px;
margin: 0;
}
}
.margin_bottom {
margin-bottom: 10px;
}
.row [class*="col-"] {
padding-right: 5px;
padding-left: 5px;
}
.row {
margin-left: -5px;
margin-right: -5px;
}
.card-img-bottom {
color: #fff;
height: 20rem;
background: url(images/img1.jpg) center no-repeat;
background-size: cover;
}
.img-responsive {
height: 100%;
}
#media (max-width: 768px) {
.img-responsive {
width: 100%;
}
}
</style>
<div class="container">
<!--<h3>Grid 1</h3>-->
<div class="row">
<div class="col-sm-12">
<div class="row">
<div class="col-sm-6 margin_bottom">
<img src="http://placehold.it/600x410" alt="5" class="img-responsive" />
</div>
<div class="col-sm-6">
<div class="row">
<div class="col-sm-12 margin_bottom">
<img src="http://placehold.it/600x200" alt="5" class="img-responsive" />
</div>
</div>
<div class="row">
<div class="col-xs-6 col-sm-6">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
<div class="col-xs-6 col-sm-6">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
</div>
</div>
</div>
</div>
</div>
<!--<h3>Grid 2</h3>-->
<div class="row">
<div class="col-sm-4 margin_bottom">
<img src="http://placehold.it/400x510" alt="5" class="img-responsive" />
</div>
<div class="col-sm-4">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/400x250" alt="5" class="img-responsive" />
</div>
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/400x250" alt="5" class="img-responsive" />
</div>
</div>
</div>
<div class="col-sm-4 margin_bottom">
<img src="http://placehold.it/400x510" alt="5" class="img-responsive" />
</div>
</div>
<!--<h3>Grid 3</h3>-->
<div class="row">
<div class="col-sm-3 margin_bottom">
<img src="http://placehold.it/300x410" alt="5" class="img-responsive" />
</div>
<div class="col-sm-6 margin_bottom">
<img src="http://placehold.it/600x410" alt="5" class="img-responsive" />
</div>
<div class="col-sm-3 margin_bottom">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
<div class=" col-xs-6 col-sm-12">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
</div>
</div>
</div>
<!--<h3>Grid 4</h3>-->
<div class="row">
<div class="col-sm-3 margin_bottom">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
<div class=" col-xs-6 col-sm-12">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
</div>
</div>
<div class="col-sm-6 margin_bottom">
<img src="http://placehold.it/600x410" alt="5" class="img-responsive" />
</div>
<div class="col-sm-3 margin_bottom">
<div class="row">
<div class="col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
<div class=" col-xs-6 col-sm-12 margin_bottom">
<img src="http://placehold.it/300x200" alt="5" class="img-responsive" />
</div>
</div>
</div>
</div>
</div>