diff --git a/scss/_reboot.scss b/scss/_reboot.scss
index ea0b3d1e51..2efad8680a 100644
--- a/scss/_reboot.scss
+++ b/scss/_reboot.scss
@@ -364,6 +364,7 @@ pre {
   margin-bottom: 1rem; // 2
   overflow: auto; // 3
   @include font-size($code-font-size);
+  line-height: $pre-line-height; // Boosted mod
   color: $pre-color;
   -ms-overflow-style: scrollbar; // 4
 
diff --git a/scss/_tables.scss b/scss/_tables.scss
index 658d18d7f3..bca87dbae5 100644
--- a/scss/_tables.scss
+++ b/scss/_tables.scss
@@ -28,8 +28,8 @@
   // Another advantage is that this generates less code and makes the selector less specific making it easier to override.
   // stylelint-disable-next-line selector-max-universal
   > :not(caption) > * > * {
-    padding: $table-cell-padding-y $table-cell-padding-x $table-cell-padding-x;
-    line-height: $table-cell-line-height; // Boosted mod
+    padding: $table-cell-padding-y $table-cell-padding-x add($table-cell-padding-y, 1px); // Boosted mod
+    line-height: $table-line-height; // Boosted mod
     background-color: var(--bs-table-bg);
     background-image: linear-gradient(var(--bs-table-accent-bg), var(--bs-table-accent-bg));
   }
@@ -70,7 +70,7 @@
 .table-sm {
   // stylelint-disable-next-line selector-max-universal
   > :not(caption) > * > * {
-    line-height: $table-cell-line-height-sm; // Boosted mod
+    padding: $table-cell-padding-y-sm $table-cell-padding-x-sm add($table-cell-padding-y-sm, 1px); // Boosted mod
   }
 }
 
diff --git a/scss/_type.scss b/scss/_type.scss
index 325c224d7d..233b882c29 100644
--- a/scss/_type.scss
+++ b/scss/_type.scss
@@ -40,17 +40,16 @@
   letter-spacing: $h2-spacing;
 }
 
-.display-2 {
+h1,
+.display-2,
+.display-3 {
   @include font-size($h3-font-size);
   line-height: $h3-line-height;
-  letter-spacing: $h3-spacing;
+  letter-spacing: $mid-spacing;
 }
 
-h1,
-.display-3 {
-  @include font-size($h4-font-size);
-  line-height: $h4-line-height;
-  letter-spacing: $h4-spacing;
+.display-2 {
+  letter-spacing: $h3-spacing;
 }
 
 h2,
@@ -68,6 +67,7 @@ h2,
 }
 
 @include media-breakpoint-up(sm) {
+  h1,
   .display-1,
   .display-2,
   .display-3 {
@@ -84,17 +84,12 @@ h2,
     letter-spacing: $display3-spacing;
   }
 
+  h1,
   .display-3 {
     @include font-size($display4-size);
     letter-spacing: $display4-spacing;
   }
 
-  h1 {
-    @include font-size($h2-font-size);
-    line-height: $h2-line-height;
-    letter-spacing: $h2-spacing;
-  }
-
   h2,
   .display-4 {
     @include font-size($h3-font-size);
@@ -102,12 +97,7 @@ h2,
     letter-spacing: $h3-spacing;
   }
 
-  h3 {
-    @include font-size($h4-font-size);
-    line-height: $h4-line-height;
-    letter-spacing: $h4-spacing;
-  }
-
+  h3,
   h4,
   .lead {
     @include font-size($h5-font-size);
@@ -134,15 +124,10 @@ h2,
 
   .display-4 {
     @include font-size($display4-size);
+    line-height: $display-line-height;
     letter-spacing: $display4-spacing;
   }
 
-  h1 {
-    @include font-size($h1-font-size);
-    line-height: $h1-line-height;
-    letter-spacing: $h1-spacing;
-  }
-
   h2 {
     @include font-size($h2-font-size);
     line-height: $h2-line-height;
diff --git a/scss/_utilities.scss b/scss/_utilities.scss
index 49a7bab576..a01c2ca2e5 100644
--- a/scss/_utilities.scss
+++ b/scss/_utilities.scss
@@ -400,7 +400,7 @@ $utilities: map-merge(
         1: 1,
         sm: $line-height-sm,
         base: $line-height-base,
-        lg: $table-cell-line-height,
+        lg: $line-height-lg,
       )
     ),
     "background-color": (
diff --git a/scss/_variables.scss b/scss/_variables.scss
index d81e980e3c..09f7f32c35 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -419,7 +419,7 @@ $embed-responsive-aspect-ratios: (
 // Font, line-height, and color for body text, headings, and more.
 
 // stylelint-disable value-keyword-case
-$font-family-sans-serif:      HelvNeueOrange, Helvetica Neue, Helvetica, Arial, system-ui, -apple-system, Segoe UI, Roboto, Liberation Sans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji !default;
+$font-family-sans-serif:      HelvNeueOrange, Helvetica Neue, Helvetica, Arial, Liberation Sans, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji !default;
 $font-family-monospace:       SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, Courier New, monospace !default;
 // stylelint-enable value-keyword-case
 $font-family-base:            var(--bs-font-sans-serif) !default;
@@ -443,7 +443,7 @@ $font-weight-bold:            700 !default;
 $font-weight-base:            $font-weight-normal !default;
 
 // stylelint-disable function-blacklist
-$line-height-base:            1.25 !default;
+$line-height-base:            calc(18 / 16) !default;
 $line-height-sm:              calc(16 / 14) !default;
 $line-height-lg:              calc(30 / 16) !default;
 // stylelint-enable function-blacklist
@@ -457,7 +457,8 @@ $h5-font-size:                $font-size-lg !default;             // 18px
 $h6-font-size:                $font-size-base !default;           // 16px
 $h1-spacing:                  $letter-spacing-base * 10 !default; // -1px
 $h2-spacing:                  $letter-spacing-base * 8 !default;  // -0.8px
-$h3-spacing:                  $letter-spacing-base * 6 !default;  // -0.6px
+$mid-spacing:                 $letter-spacing-base * 6 !default;  // -0.6px
+$h3-spacing:                  $letter-spacing-base * 5 !default;  // -0.5px
 $h4-spacing:                  $letter-spacing-base * 4 !default;  // -0.4px
 $h5-spacing:                  $letter-spacing-base * 2 !default;  // -0.2px
 $h6-spacing:                  $letter-spacing-base !default;
@@ -467,7 +468,7 @@ $h2-line-height:              calc(32 / 30) !default;
 $h3-line-height:              calc(26 / 24) !default;
 $h4-line-height:              calc(22 / 20) !default;
 $h5-line-height:              calc(20 / 18) !default;
-$h6-line-height:              calc(18 / 16) !default;
+$h6-line-height:              $line-height-base !default;
 // stylelint-enable function-blacklist
 
 $headings-margin-bottom:      $spacer !default;
@@ -482,9 +483,9 @@ $display1-size:               $font-size-xlg * 3 !default;        // 60px
 $display2-size:               $font-size-xlg * 2.5 !default;      // 50px
 $display3-size:               $font-size-xlg * 2 !default;        // 40px
 $display4-size:               $h1-font-size !default;             // 34px
-$display1-spacing:            $letter-spacing-base * 24 !default; // -2.4px
+$display1-spacing:            $letter-spacing-base * 20 !default; // -2px
 $display2-spacing:            $letter-spacing-base * 16 !default; // -1.6px
-$display3-spacing:            $letter-spacing-base * 12 !default; // -1.2px
+$display3-spacing:            $h1-spacing !default;               // -1px
 $display4-spacing:            $h1-spacing !default;               // -1px
 $display-line-height:         $h1-line-height !default;
 // scss-docs-end display-headings
@@ -492,9 +493,9 @@ $display-line-height:         $h1-line-height !default;
 $lead-font-size:              $font-size-xlg !default;
 $lead-font-weight:            400 !default;
 $lead-line-height:            1.5 !default;
-$lead-letter-spacing:         $letter-spacing-base * .25 !default;
+$lead-letter-spacing:         $letter-spacing-base * 2.5 !default;
 
-$small-font-size:             .875em !default;
+$small-font-size:             .875rem !default;
 
 $sub-sup-font-size:           .75em !default;
 
@@ -533,12 +534,13 @@ $mark-bg:                     $primary !default;
 
 // stylelint-disable function-blacklist
 // scss-docs-start table-variables
-$table-cell-padding-y:      add(.5rem, 1px) !default;
+$table-cell-padding-y:      .875rem !default;
 $table-cell-padding-x:      $spacer / 2 !default;
-$table-cell-line-height:    $line-height-lg !default; // Boosted mod
-$table-cell-line-height-sm: calc(20 / 16) !default;  // Boosted mod
+$table-cell-padding-y-sm:   .5625rem !default;
+$table-cell-padding-x-sm:   $table-cell-padding-x !default;
 
 $table-cell-vertical-align:   top !default;
+$table-line-height:           1.25 !default; // Boosted mod
 
 $table-color:                 $body-color !default;
 $table-bg:                    $body-bg !default;
@@ -576,7 +578,7 @@ $input-btn-padding-y:         .5rem !default;
 $input-btn-padding-x:         1.125rem !default;
 $input-btn-font-family:       inherit !default;
 $input-btn-font-size:         $font-size-base !default;
-$input-btn-line-height:       $line-height-base !default;
+$input-btn-line-height:       1.25 !default;
 
 $input-btn-focus-width:         .125rem !default;
 $input-btn-focus-box-shadow:    null !default;
@@ -698,7 +700,7 @@ $input-transition:                      border-color $transition-duration $trans
 
 
 $form-check-input-width:                  1.25em !default;
-$form-check-min-height:                   $font-size-base * $line-height-base !default;
+$form-check-min-height:                   $font-size-base * $input-btn-line-height !default;
 $form-check-padding-left:                 $form-check-input-width + .5em !default;
 $form-check-margin-bottom:                .125rem !default;
 $form-check-label-color:                  null !default;
@@ -1328,6 +1330,7 @@ $kbd-color:                         $black !default;
 $kbd-bg:                            $gray-300 !default;
 
 $pre-color:                         $gray-900 !default;
+$pre-line-height:                   1.25 !default;
 
 //
 // Boosted mod
diff --git a/scss/forms/_form-check.scss b/scss/forms/_form-check.scss
index 099272caa6..39689ba62c 100644
--- a/scss/forms/_form-check.scss
+++ b/scss/forms/_form-check.scss
@@ -17,7 +17,7 @@
 .form-check-input {
   width: $form-check-input-width;
   height: $form-check-input-width;
-  margin-top: ($line-height-base - $form-check-input-width) / 2; // line-height minus check height
+  margin-top: ($input-btn-line-height - $form-check-input-width) / 2; // line-height minus check height
   vertical-align: top;
   background-color: $form-check-input-bg;
   background-repeat: no-repeat;
diff --git a/site/content/docs/5.0/content/reboot.md b/site/content/docs/5.0/content/reboot.md
index 5c9867b9fd..6f86c5025a 100644
--- a/site/content/docs/5.0/content/reboot.md
+++ b/site/content/docs/5.0/content/reboot.md
@@ -38,15 +38,7 @@ $font-family-sans-serif:
   // Helvetica Neue
   Helvetica Neue,
   // Websafe Fallbacks
-  Helvetica, Arial
-  // Safari for macOS and iOS (San Francisco)
-  -apple-system,
-  // Chrome < 56 for macOS (San Francisco)
-  BlinkMacSystemFont,
-  // Windows
-  Segoe UI,
-  // Android
-  Roboto,
+  Helvetica, Arial,
   // Ubuntu
   Liberation Sans,
   // Sans serif fallback
diff --git a/site/content/docs/5.0/content/typography.md b/site/content/docs/5.0/content/typography.md
index dd09c7136b..33a3bfd8fa 100644
--- a/site/content/docs/5.0/content/typography.md
+++ b/site/content/docs/5.0/content/typography.md
@@ -47,8 +47,8 @@ All HTML headings, `<h1>` through `<h6>`, are available.
         {{< markdown >}}`<h1></h1>`{{< /markdown >}}
       </td>
       <td>Bold 2.125rem <small class="text-muted">(34px)</small></td>
-      <td>Bold 1.875rem <small class="text-muted">(30px)</small></td>
-      <td>Bold 1.25rem <small class="text-muted">(20px)</small></td>
+      <td>Bold 1.875rem <small class="text-muted">(34px)</small></td>
+      <td>Bold 1.25rem <small class="text-muted">(24px)</small></td>
       <td>1 <small class="text-muted">(34px)</small></td>
       <td>-0.0625rem <small class="text-muted">(-1px)</small></td>
     </tr>
@@ -67,10 +67,10 @@ All HTML headings, `<h1>` through `<h6>`, are available.
         {{< markdown >}}`<h3></h3>`{{< /markdown >}}
       </td>
       <td>Bold 1.5rem <small class="text-muted">(24px)</small></td>
-      <td>Bold 1.25rem <small class="text-muted">(20px)</small></td>
+      <td>Bold 1.25rem <small class="text-muted">(18px)</small></td>
       <td rowspan="2">Bold 1rem <small class="text-muted">(16px)</small></td>
       <td>1.083 <small class="text-muted">(26px)</small></td>
-      <td>-0.0375rem <small class="text-muted">(-0.6px)</small></td>
+      <td>-0.0375rem <small class="text-muted">(-0.5px)</small></td>
     </tr>
     <tr>
       <td>
@@ -162,7 +162,7 @@ Traditional heading elements are designed to work best in the meat of your page
       <td>Bold 3.125rem <small class="text-muted">(50px)</small></td>
       <td>Bold 1.875rem <small class="text-muted">(30px)</small></td>
       <td>1 <small class="text-muted">(60px)</small></td>
-      <td>-0.15rem <small class="text-muted">(-2.4px)</small></td>
+      <td>-0.15rem <small class="text-muted">(-2px)</small></td>
     </tr>
     <tr>
       <td>Display 2</td>
@@ -176,9 +176,9 @@ Traditional heading elements are designed to work best in the meat of your page
       <td>Display 3</td>
       <td>Bold 2.5rem <small class="text-muted">(40px)</small></td>
       <td>Bold 2.125rem <small class="text-muted">(34px)</small></td>
-      <td>Bold 1.25rem <small class="text-muted">(20px)</small></td>
+      <td>Bold 1.25rem <small class="text-muted">(24px)</small></td>
       <td>1 <small class="text-muted">(40px)</small></td>
-      <td>-0.075rem <small class="text-muted">(-1.2px)</small></td>
+      <td>-0.075rem <small class="text-muted">(-1px)</small></td>
     </tr>
     <tr>
       <td>Display 4</td>