Four columns bootstrap

by labanino

HTML

<div class="container">
  <div class="row">
    <div class="col-md-3">.col-md-3</div>
    <div class="col-md-3">.col-md-3</div>
    <div class="col-md-3">.col-md-3</div>
    <div class="col-md-3">.col-md-3</div>
  </div>
</div>

CSS

/*!
 * Bootstrap v3.3.5 (http://getbootstrap.com)
 * Copyright 2011-2016 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 */

/*!
 * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=ce53744ee784fbcffeca)
 * Config saved to config.json and https://gist.github.com/ce53744ee784fbcffeca
 */
/*!
 * Bootstrap v3.3.6 (http://getbootstrap.com)
 * Copyright 2011-2015 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 */
/*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */

/* http://startbootstrap.com/template-overviews/4-col-portfolio/ */

.container {
  margin-right: auto;
  margin-left: auto;
  padding-left: 5px;
  padding-right: 5px;
}
@media (min-width: 768px) {
  .container {
    width: 730px;
  }
}
@media (min-width: 970px) {
  .container {
    width: 950px;
  }
}
@media (min-width: 1200px) {
  .container {
    width: 1150px;
  }
}
.container-fluid {
  margin-right: auto;
  margin-left: auto;
  padding-left: 5px;
  padding-right: 5px;
}
.row {
  margin-left: -5px;
  margin-right: -5px;
}
.col-xs-1, .col-sm-1, .col-md-1, .col-lg-1, .col-xs-2, .col-sm-2, .col-md-2, .col-lg-2, .col-xs-3, .col-sm-3, .col-md-3, .col-lg-3, .col-xs-4, .col-sm-4, .col-md-4, .col-lg-4, .col-xs-5, .col-sm-5, .col-md-5, .col-lg-5, .col-xs-6, .col-sm-6, .col-md-6, .col-lg-6, .col-xs-7, .col-sm-7, .col-md-7, .col-lg-7, .col-xs-8, .col-sm-8, .col-md-8, .col-lg-8, .col-xs-9, .col-sm-9, .col-md-9, .col-lg-9, .col-xs-10, .col-sm-10, .col-md-10, .col-lg-10, .col-xs-11, .col-sm-11, .col-md-11, .col-lg-11, .col-xs-12, .col-sm-12, .col-md-12, .col-lg-12 {
  position: relative;
  min-height: 1px;
  padding-left: 5px;
  padding-right: 5px;
}
.col-xs-1, .col-xs-2, .col-xs-3, .col-xs-4, .col-xs-5, .col-xs-6, .col-xs-7, .col-xs-8, .col-xs-9, .col-xs-10, .col-xs-11, .col-xs-12 {
  float: left;
}
.col-xs-12 {
  width: 100%;
}
.col-xs-11 {
  width:...