fix(css): a few last style tweaks

Author: lwasser

_sass/minimal-mistakes/_base.scss

@@ -174,9 +174,9 @@ blockquote.highlight-quote {
   }
 
   p {
-    font-size: 21px;
+    font-size: 1.3rem;
     position: relative;
-    margin-bottom: 10px;
+    margin-bottom: 0.63rem;
 
     &:before {
       @extend %quote-style;

_sass/minimal-mistakes/_notices.scss

@@ -123,7 +123,7 @@
 /* Quotes in notice blocks */
 
 .notice blockquote {
-  font-size: 1.5em;
+  font-size: 1.5rem;
   margin: 7em 2em;
   max-width: 100%;
 
@@ -152,7 +152,7 @@
   padding: 3em;
 
   p, li {
-    font-size: 1.1em !important;
+    font-size: 1.1em!important;
   }
 
   h2, h3 {

_sass/minimal-mistakes/_page.scss

@@ -600,7 +600,7 @@ body {
 
 @media screen and (max-width: 768px) {
   .page__content, .archive__item {
-    font-size: 1em
+    font-size: 1.1em
   }
 
   .element-item {

_sass/minimal-mistakes/_reset.scss

@@ -11,7 +11,7 @@ html {
   font-size: 1rem;
 
   @include breakpoint($medium) {
-    font-size: 1.0625rem; // 17px / 16px = 1.0625rem
+    font-size: 1.2625rem; // 17px / 16px = 1.0625rem
   }
 
   @include breakpoint($large) {