Update to site

sass/oscailte/helpers/_classes.scss

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+.pull-left  {float: left;}
+.pull-right {float: right;}
+
+.clearfix {
+  *zoom: 1;
+  &::before,
+  &::after {
+    display: table;
+    content: "";
+    line-height: 0;
+  }
+  &::after {
+    clear: both;
+  }
+}
+
+ul, ol {
+  &.unstyled {
+    list-style-type: none;
+    margin: 0;
+  }
+
+  &.inline {
+    @extend .unstyled;
+    list-style-type: none;
+    > li {display: inline;}
+  }
+
+  &.divided {
+    @extend .unstyled;
+    > li {
+      border-top:    1px solid lighten($site-background, 5%);
+      border-bottom: 1px solid darken($site-background, 5%);
+      padding: 0.5em 0;
+
+      &:first-child {
+        border-top: none;
+        padding-top: 0;
+      }
+      &:last-child {border-bottom: none;}
+    }
+  }
+}
+
+.btn {
+  @include gradient-vertical;
+  @include box-shadow(0 0 3px rgba(0, 0, 0, 0.25));
+  border-radius: 3px;
+  color: $button-text;
+  display: inline-block;
+  padding: 7px 15px;
+  text-decoration: none;
+  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.25);
+  &:hover {
+    text-decoration: underline;
+  }
+  &:visited {
+    color: $button-text;
+  }
+}

sass/oscailte/helpers/_grid-fix.scss

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+/*
+ * A modified version of @kevva solution https://github.com/csswizardry/inuit.css/issues/170#issuecomment-14859371
+ * Letter spacing hack to remove the necessity of using empty HTML comments between columns.
+ *
+ */
+
+@if $use-gridfix == true {
+  .grid {
+    letter-spacing: -1rem;
+  }
+
+  /* Opera hack */
+  .opera:-o-prefocus,
+  .grid {
+    word-spacing: -1rem;
+  }
+
+  .grid__item {
+    letter-spacing: normal;
+    word-spacing: normal;
+  }
+}
+
+/*
+ * An implementation of flexbox which can be applied to the grid items
+ *
+ */
+
+@media only screen and (min-width: $lap-start){
+  .flex {
+    display: -webkit-box;
+    display: -moz-box;
+    display: -ms-flexbox;
+    display: -webkit-flex;
+    display: flex;
+    -webkit-box-direction: normal;
+    -moz-box-direction: normal;
+    -webkit-box-orient: horizontal;
+    -moz-box-orient: horizontal;
+    -webkit-flex-direction: row;
+    -ms-flex-direction: row;
+    flex-direction: row;
+    -webkit-flex-wrap: nowrap;
+    -ms-flex-wrap: nowrap;
+    flex-wrap: nowrap;
+    -webkit-box-pack: start;
+    -moz-box-pack: start;
+    -webkit-justify-content: flex-start;
+    -ms-flex-pack: start;
+    justify-content: flex-start;
+    -webkit-align-content: stretch;
+    -ms-flex-line-pack: stretch;
+    align-content: stretch;
+    -webkit-box-align: start;
+    -moz-box-align: start;
+    -webkit-align-items: flex-start;
+    -ms-flex-align: start;
+    align-items: flex-start;
+  }
+
+  .flex__item {
+    -webkit-box-ordinal-group: 1;
+    -moz-box-ordinal-group: 1;
+    -webkit-order: 0;
+    -ms-flex-order: 0;
+    order: 0;
+    -webkit-box-flex: 0;
+    -moz-box-flex: 0;
+    -webkit-flex: 0 1 auto;
+    -ms-flex: 0 1 auto;
+    flex: 0 1 auto;
+    -webkit-align-self: center;
+    -ms-flex-item-align: center;
+    align-self: center;
+  }
+}