<!-- Case studies Section -->
<div id="projects" class="projects">
{% for post in site.case_studies %}
    {% if post.status contains 'published' %}
    <section id="{{ post.slug }}" class="collection-list--item">
        <div class="container">
            <div class="row">
                <div class="col-sm">
                    <a href="{{ post.url | prepend: site.baseurl }}" class="project-link">
                        <img src="/assets/img/case-studies/{{ post.thumbnail }}" class="img-responsive img-centered" alt="">
                    </a>
                </div>
                <div class="col-sm">
                    <h4>{{ post.title }}</h4>

                    <ul class="list-inline">
                        {% for tag in post.tags %}
                        <li class="list-inline-item text-muted">
                            <small>{{ tag }}</small>
                        </li>
                        {% endfor %}
                    </ul>

                    <br />

                    <p>{{ post.subtitle }}</p>
                    <br /><br />
                    <a href="{{ post.url | prepend: site.baseurl }}" class="project-link">
                        Learn more about our work on {{ post.title }}
                    </a>
                </div>
            </div>
        </div>
    </section>
    {% endif %}
{% endfor %}
</div>

<!-- Case studies Section -->
<div id="projects" class="projects">
{% for post in site.case_studies %}
    {% if post.status contains 'published' %}
    <section id="{{ post.slug }}" class="collection-list--item">
        <div class="container">
            <div class="row">
                <div class="col-sm">
                    <a href="{{ post.url | prepend: site.baseurl }}" class="project-link">
                        <img src="/assets/img/case-studies/{{ post.thumbnail }}" class="img-fluid img-centered" alt="">
                    </a>
                </div>
                <div class="col-sm">
                    <h4>{{ post.title }}</h4>

                    <ul class="list-inline">
                        {% for tag in post.tags %}
                        <li class="list-inline-item text-muted">
                            <small>{{ tag }}</small>
                        </li>
                        {% endfor %}
                    </ul>

                    <br />

                    <p>{{ post.subtitle }}</p>
                    <br /><br />
                    <a href="{{ post.url | prepend: site.baseurl }}" class="project-link">
                        Learn more about our work on {{ post.title }}
                    </a>
                </div>
            </div>
        </div>
    </section>
    {% endif %}
{% endfor %}
</div>

Update outdated bootstrap class for responsive img
Update outdated bootstrap class for responsive img
