html - Bootstrap Columns not working when putting Margin -


i have 2 rows, each 1 of them divided 2 columns col-sm-6. long keep code is, columns work, sections sticking together; so, when try give them margin setting

.col-sm-6 { margin: 15px; }

in css, columns break , divided vertically. no matter kind of margin put, give me same problem. tried other possible solutions beside this, still, can't solve it. doing wrong?

<div class="container">  <div class="row">   <div class="col-sm-6 categories" style="background-image: url(https://source.unsplash.com/category/nature/1600x900);">    <div class="opacity-overlay">      <h2>section 1</h2>      <p>lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>    </div>  </div>   <div class="col-sm-6 categories" style="background-image: url(https://source.unsplash.com/category/food/1600x900);">    <div class="opacity-overlay">      <h2>section 2</h2>      <p>lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>    </div>   </div> </div>   <div class="row">   <div class="col-sm-6 categories" style="background-image: url(https://source.unsplash.com/category/people/1600x900);">    <div class="opacity-overlay">      <h2>section 3</h2>      <p>lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>    </div>  </div>   <div class="col-sm-6 categories" style="background-image: url(https://source.unsplash.com/category/objects/1600x900);">    <div class="opacity-overlay">      <h2>section 4</h2>      <p>lorem ipsum dolor sit amet, consectetur adipisicing elit.</p>    </div>   </div> </div>  </div>

this css:

.categories {   text-align: center;   background-position: center center;   background-size: cover;   color: black;   padding: 50px; }  .opacity-overlay {   background: rgba(255, 255, 255, 0.85);   padding: 1px 20px 10px 20px; }

indeed, bootstrap grid system needs take on margin-left , margin-right properties work. if override those, won't work intended. 2 possible solutions:

  1. if looking vertical spacing, use margin-top or margin-bottom rather margin.

  2. put <div class="container"> inside <div class="cols-xs-6">. margins apply container within confines of column div.


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