diff --git a/frontend/less/espo/custom.less b/frontend/less/espo/custom.less
index fe36f2deb1..8a20eadf69 100644
--- a/frontend/less/espo/custom.less
+++ b/frontend/less/espo/custom.less
@@ -2727,36 +2727,46 @@ table.table td.cell .html-container {
     }
 
     h1 {
-        font-weight: 600;
-        margin-top: var(--line-height-computed);
-        margin-bottom: calc(var(--line-height-computed) / 2);
+        font-size: calc(var(--font-size-base) * 1.4);
+        font-weight: 500;
+        margin-top: calc(var(--line-height-computed) * 1.5);
+        margin-bottom: calc(var(--line-height-computed) / 2 * 1.5);
+
+        padding-bottom: 0.4em;
+        border-bottom: var(--1px) solid var(--panel-default-border);
     }
 
-    h2, h3 {
-        font-weight: 600;
-        margin-top: calc(var(--line-height-computed) / 2 * 1.2);
+    h2 {
+        font-size: calc(var(--font-size-base) * 1.2);
+        font-weight: 500;
+        margin-top: calc(var(--line-height-computed) * 1.24);
+        margin-bottom: calc(var(--line-height-computed) / 2 * 1.2);
+    }
+
+    h3 {
+        font-size: calc(var(--font-size-base) * 1.1);
+        font-weight: 500;
+        margin-top: calc(var(--line-height-computed) / 2 * 1.4);
         margin-bottom: calc(var(--line-height-computed) / 2);
     }
 
     h4 {
         font-weight: 500;
+        margin-top: calc(var(--line-height-computed) / 2 * 1.3);
+        margin-bottom: calc(var(--line-height-computed) / 2);
     }
 
-    h4, h5, h6 {
+    h5, h6 {
         font-weight: normal;
+    }
+
+   h5, h6 {
         margin-top: calc(var(--line-height-computed) / 2);
         margin-bottom: calc(var(--line-height-computed) / 2);
     }
 
-    h1 {
-        font-size: calc(var(--font-size-base) * 1.2);
-    }
 
-    h2 {
-        font-size: calc(var(--font-size-base) * 1.1);
-    }
-
-    h3, h4, h5, h6 {
+    h4, h5, h6 {
         font-size: var(--font-size-base);
     }
 
diff --git a/frontend/less/espo/elements/type.less b/frontend/less/espo/elements/type.less
index 235a0331c0..55d5c0b5d7 100644
--- a/frontend/less/espo/elements/type.less
+++ b/frontend/less/espo/elements/type.less
@@ -98,7 +98,7 @@ pre > code {
 }
 
 hr {
-    border-top: var(--1px) solid @panel-default-border;
+    border-top: var(--1px) solid var(--panel-default-border);
 }
 
 blockquote {