Polish font sizes and generally scale down

app/views/layouts/mailer.html.erb

@@ -10,7 +10,7 @@
 
       body {
         font-family: system-ui, sans-serif;
-        font-size: 1rem;
+        font-size: 16px;
         line-height: 1.3;
         margin: 0;
         padding: 1rem;
@@ -76,7 +76,7 @@
       }
 
       .event__title {
-        font-size: 1.2em;
+        font-size: 1.1em;
         font-weight: 900;
         margin-bottom: 0;
         margin-top: 0;
@@ -99,7 +99,7 @@
       }
 
       .notification__title {
-        font-size: 0.9em;
+        font-size: 0.8em;
         font-weight: normal;
         margin-bottom: 0;
         margin-top: 0;
@@ -108,13 +108,13 @@
       }
 
       .subtitle {
-        font-size: 1.3em;
+        font-size: 1em;
         font-weight: normal;
-        margin-top: 0;
+        margin-top: 0.1em;
       }
 
       .title {
-        font-size: 1.5em;
+        font-size: 1.2em;
         font-weight: 900;
         margin-bottom: 0;
       }