Update font-sizes value to use the REM unit and line-heights to be

unitless to be more consistent of the relative unit values used already
to establish consistent typography while simultaneously being more
accommodating of RWD & a11y-friendly uses of the the declarations.

typography.html

@@ -50,129 +50,128 @@
         @apply --paper-font-common-base;
         @apply --paper-font-common-nowrap;
 
-        font-size: 112px;
+        font-size: 7rem;
         font-weight: 300;
         letter-spacing: -.044em;
-        line-height: 120px;
+        line-height: 1.071428571;
       };
 
       --paper-font-display3: {
         @apply --paper-font-common-base;
         @apply --paper-font-common-nowrap;
 
-        font-size: 56px;
+        font-size: 3.5rem;
         font-weight: 400;
         letter-spacing: -.026em;
-        line-height: 60px;
+        line-height: 1.071428571;
       };
 
       --paper-font-display2: {
         @apply --paper-font-common-base;
 
-        font-size: 45px;
+        font-size: 2.8125rem;
         font-weight: 400;
         letter-spacing: -.018em;
-        line-height: 48px;
+        line-height: 1.066666667;
       };
 
       --paper-font-display1: {
         @apply --paper-font-common-base;
 
-        font-size: 34px;
+        font-size: 2.125rem;
         font-weight: 400;
         letter-spacing: -.01em;
-        line-height: 40px;
+        line-height: 1.176470588;
       };
 
       --paper-font-headline: {
         @apply --paper-font-common-base;
 
-        font-size: 24px;
+        font-size: 1.5rem;
         font-weight: 400;
         letter-spacing: -.012em;
-        line-height: 32px;
+        line-height: 1.333333333;
       };
 
       --paper-font-title: {
         @apply --paper-font-common-base;
         @apply --paper-font-common-nowrap;
 
-        font-size: 20px;
+        font-size: 1.25rem;
         font-weight: 500;
-        line-height: 28px;
+        line-height: 1.4;
       };
 
       --paper-font-subhead: {
         @apply --paper-font-common-base;
 
-        font-size: 16px;
+        font-size: 1rem;
         font-weight: 400;
-        line-height: 24px;
+        line-height: 1.5;
       };
 
       --paper-font-body2: {
         @apply --paper-font-common-base;
 
-        font-size: 14px;
+        font-size: .875rem;
         font-weight: 500;
-        line-height: 24px;
+        line-height: 1.714285714;
       };
 
       --paper-font-body1: {
         @apply --paper-font-common-base;
 
-        font-size: 14px;
+        font-size: .875rem;
         font-weight: 400;
-        line-height: 20px;
+        line-height: 1.428571429;
       };
 
       --paper-font-caption: {
         @apply --paper-font-common-base;
         @apply --paper-font-common-nowrap;
 
-        font-size: 12px;
+        font-size: .75rem;
         font-weight: 400;
         letter-spacing: 0.011em;
-        line-height: 20px;
+        line-height: 1.666666667;
       };
 
       --paper-font-menu: {
         @apply --paper-font-common-base;
         @apply --paper-font-common-nowrap;
 
-        font-size: 13px;
+        font-size: .8125rem;
         font-weight: 500;
-        line-height: 24px;
+        line-height: 1.846153846;
       };
 
       --paper-font-button: {
         @apply --paper-font-common-base;
         @apply --paper-font-common-nowrap;
 
-        font-size: 14px;
+        font-size: .875rem;
         font-weight: 500;
         letter-spacing: 0.018em;
-        line-height: 24px;
+        line-height: 1.714285714;
         text-transform: uppercase;
       };
 
       --paper-font-code2: {
         @apply --paper-font-common-code;
 
-        font-size: 14px;
+        font-size: .875rem;
         font-weight: 700;
-        line-height: 20px;
+        line-height: 1.428571429;
       };
 
       --paper-font-code1: {
         @apply --paper-font-common-code;
 
-        font-size: 14px;
+        font-size: .875rem;
         font-weight: 500;
-        line-height: 20px;
+        line-height: 1.428571429;
       };
 
     }
-
   </style>
 </custom-style>