.highlight {
  background: #f5f5f5;
  color: #000;
  padding: 1em;
  border-radius: 2px;
  overflow-x: auto;
}

.highlight .k  { color: #000; font-weight: bold; } /* keywords */
.highlight .s  { color: #333; }                    /* strings */
.highlight .c  { color: #888; font-style: italic; } /* comments */
.highlight .nf { color: #000; }                    /* functions */
.highlight .mi { color: #000; }                    /* numbers */
.highlight .o  { color: #000; }                    /* operators */