adjusting typographical scale

apps/openassessment/xblock/static/css/openassessment.css

@@ -421,12 +421,12 @@ hr.divider,
   line-height: 21px; }
 
 .wrapper--xblock .problem__header, .openassessment .submission__peer-evaluations__questions .answer__value__value, .openassessment .openassessment__steps__step .step__instruction, .openassessment .openassessment__prompt__copy, .openassessment .step--grade .grade__value__description, .openassessment .step--grade .grade__summary, .openassessment .submission__feeedback__instructions, .openassessment .openassessment__steps__step .step__actions .action--submit .ico {
-  font-size: 18px;
-  line-height: 27px; }
+  font-size: 16px;
+  line-height: 24px; }
 
 .openassessment .openassessment__steps__step .step__title .step__label, .openassessment .step--grade .step__title .grade__value__title, .openassessment .openassessment__steps__step .step__title .step__counter:before, .openassessment .openassessment__steps .openassessment__steps__step .step__header .step__title .step__counter:before {
-  font-size: 22px;
-  line-height: 33px; }
+  font-size: 18px;
+  line-height: 27px; }
 
 .wrapper--xblock .problem__header, .openassessment .step--peer-assessment .peer-assessment__assessment .assessment__rubric__question .question__title__copy, .openassessment .step--self-assessment .self-assessment__assessment .assessment__rubric__question .question__title__copy, .openassessment .message .message__title, .openassessment .step--peer-assessment .peer-assessment__display__header .peer-assessment__display__title, .openassessment .step--self-assessment .self-assessment__display__title, .openassessment .submission__answer__display__title, .openassessment .submission__peer-evaluations__title, .openassessment .submission__peer-evaluations__questions .question__title__copy, .openassessment .submission__feeedback__title, .openassessment .step--peer-assessment .peer-assessment__assessment .question__answers .answer__points, .openassessment .step--self-assessment .self-assessment__assessment .question__answers .answer__points, .openassessment .openassessment__steps__step .step__status .copy, .openassessment .step--response .response__submission__content .tip, .openassessment .step--response .response__submission__status__title, .openassessment .submission__peer-evaluations__questions .question__score, .openassessment .submission__peer-evaluations__questions .answer__score, .openassessment .submission__peer-evaluations__questions .answer__score__value, .openassessment .submission__peer-evaluations__questions .answer__source {
   text-transform: uppercase;

apps/openassessment/xblock/static/sass/xb/utilities/_variables.scss

@@ -127,9 +127,9 @@ $f-base-color: $gray-l2;
 $f-size-xsmall: 10;
 $f-size-small: 12;
 $f-size-base: 14;
-$f-size-medium: 18;
-$f-size-large: 22;
-$f-size-xlarge: 28;
+$f-size-medium: 16;
+$f-size-large: 18;
+$f-size-xlarge: 22;
 
 
 // --------------------