25%-grids with Singularity

SassMeister-input-HTML.html

<div>
  <div class="ym-g25-1">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
  <div class="ym-g25-2">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
  <div class="ym-g25-3">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
  <div class="ym-g25-4">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
</div>

SassMeister-input.scss

// ----
// Sass (v3.3.14)
// Compass (v1.0.0)
// Singularity.gs (v1.2.0.rc.6)
// ----

@import "singularitygs";

@include add-grid(4);

.ym-g25-1 {
  // Spanning the first column
  @include grid-span(1, 1);
}

.ym-g25-2 {
  // Spanning the 2nd column
  @include grid-span(1, 2);
}

.ym-g25-3 {
  // Spanning the 2nd column
  @include grid-span(1, 3);
}

.ym-g25-4 {
  // Spanning the 2nd column
  @include grid-span(1, 4);
}

// --------------

.img-teaser {
  position: relative;
}
.img-teaser img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
}
.img-teaser .teaserlink {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.85);
  color: #e1001a;
  padding: 20px;
  font-size: 18px;
  text-decoration: none;
  overflow: hidden;
}
.img-teaser .teaserlink:hover, .img-teaser .teaserlink:focus {
  background-color: rgba(255, 255, 255, 0.6);
  text-decoration: underline;
}
.img-teaser .teaserlink:after {
  content: "»";
  float: right;
}

SassMeister-output.css

@charset "UTF-8";
.ym-g25-1 {
  width: 21.05263%;
  float: left;
  margin-right: -100%;
  margin-left: 0;
  clear: none;
}

.ym-g25-2 {
  width: 21.05263%;
  float: left;
  margin-right: -100%;
  margin-left: 26.31579%;
  clear: none;
}

.ym-g25-3 {
  width: 21.05263%;
  float: left;
  margin-right: -100%;
  margin-left: 52.63158%;
  clear: none;
}

.ym-g25-4 {
  width: 21.05263%;
  float: right;
  margin-left: 0;
  margin-right: 0;
  clear: none;
}

.img-teaser {
  position: relative;
}

.img-teaser img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
}

.img-teaser .teaserlink {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.85);
  color: #e1001a;
  padding: 20px;
  font-size: 18px;
  text-decoration: none;
  overflow: hidden;
}

.img-teaser .teaserlink:hover, .img-teaser .teaserlink:focus {
  background-color: rgba(255, 255, 255, 0.6);
  text-decoration: underline;
}

.img-teaser .teaserlink:after {
  content: "»";
  float: right;
}

SassMeister-rendered.html

<div>
  <div class="ym-g25-1">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
  <div class="ym-g25-2">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
  <div class="ym-g25-3">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
  <div class="ym-g25-4">
    <div class="img-teaser">
      <img src="http://placehold.it/230x240" alt="">
      <a href="#" class="teaserlink">super-toller Link</a>
    </div>
    <!-- /.teaser -->
  </div>
</div>