feat: margin and page breaks

internal/web/static/css/main.css

@@ -29,7 +29,7 @@
 /* PRINT MODE */
 @media print {
   body {
-    margin: 2cm 1.5cm 2cm 1.5cm;
+    margin: 1cm;
     background: white;
     color: black;
   }
@@ -40,7 +40,8 @@
   }
 
   main {
-    margin-top: 0;
+    margin: 0;
+    padding: 0;
     break-after: always;
     color: black;
   }
@@ -49,6 +50,28 @@
     margin-top: 0;
     color: black;
   }
+
+  h1,
+  h2,
+  h3 {
+    break-before: page;
+    page-break-before: always;
+    break-after: avoid;
+    page-break-after: avoid;
+    break-inside: avoid;
+    page-break-inside: avoid;
+  }
+
+  p,
+  ul,
+  ol,
+  li,
+  pre,
+  blockquote,
+  table {
+    break-inside: avoid;
+    page-break-inside: avoid;
+  }
 }
 
 /* SCREEN MODE */