Minor fixes

src/page/timeline/timeline-element/timeline-element.scss

@@ -15,6 +15,7 @@
       &:before {
         content: '';
         @include square(map_get($vars, $icon-size));
+        box-sizing: content-box;
         position: absolute;
         left: calc(
           -0.5 * #{map_get($vars, $icon-size)} -
@@ -26,8 +27,7 @@
       }
 
       .date {
-        @include insignificant-font();
-        color: map_get($vars, $accent-color);
+        @include special-text-font($vars);
       }
     }
 
@@ -77,8 +77,10 @@
 
     .card {
       @include card-base($vars);
+
       border-radius: map_get($vars, $border-radius);
       background-color: map_get($vars, $card-color);
+
       overflow: hidden;
 
       & > *:not(:first-child) {
@@ -116,10 +118,7 @@
         .show-less {
           opacity: 0;
           visibility: hidden;
-          position: absolute;
-          left: 50%;
-          top: 50%;
-          transform: translateX(-50%) translateY(-50%);
+          @include absolute-center();
         }
       }
     }