style: Use Pretendard font for default

app/javascript/styles/application.scss

@@ -2,6 +2,7 @@
 @import 'mastodon/variables';
 @import 'fonts/roboto';
 @import 'fonts/roboto-mono';
+@import 'fonts/pretendard';
 
 @import 'mastodon/reset';
 @import 'mastodon/basics';

app/javascript/styles/fonts/pretendard.scss

@@ -0,0 +1,62 @@
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 900;
+  font-display: swap;
+  src: local('Pretendard JP Black'), url(../fonts/pretendard/woff2/PretendardJP-Black.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-Black.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 800;
+  font-display: swap;
+  src: local('Pretendard JP ExtraBold'), url(../fonts/pretendard/woff2/PretendardJP-ExtraBold.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-ExtraBold.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 700;
+  font-display: swap;
+  src: local('Pretendard JP Bold'), url(../fonts/pretendard/woff2/PretendardJP-Bold.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-Bold.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 600;
+  font-display: swap;
+  src: local('Pretendard JP SemiBold'), url(../fonts/pretendard/woff2/PretendardJP-SemiBold.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-SemiBold.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 500;
+  font-display: swap;
+  src: local('Pretendard JP Medium'), url(../fonts/pretendard/woff2/PretendardJP-Medium.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-Medium.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 400;
+  font-display: swap;
+  src: local('Pretendard JP Regular'), url(../fonts/pretendard/woff2/PretendardJP-Regular.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-Regular.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 300;
+  font-display: swap;
+  src: local('Pretendard JP Light'), url(../fonts/pretendard/woff2/PretendardJP-Light.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-Light.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 200;
+  font-display: swap;
+  src: local('Pretendard JP ExtraLight'), url(../fonts/pretendard/woff2/PretendardJP-ExtraLight.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-ExtraLight.woff) format('woff');
+}
+
+@font-face {
+  font-family: 'Pretendard JP';
+  font-weight: 100;
+  font-display: swap;
+  src: local('Pretendard JP Thin'), url(../fonts/pretendard/woff2/PretendardJP-Thin.woff2) format('woff2'), url(../fonts/pretendard/woff/PretendardJP-Thin.woff) format('woff');
+}

app/javascript/styles/mailer.scss

@@ -1,4 +1,5 @@
 @import 'fonts/inter';
+@import 'fonts/pretendard';
 
 body {
   accent-color: #6364ff;
@@ -21,7 +22,7 @@ h6 {
   background-color: transparent;
   padding: 0;
   border: none;
-  font-family: Inter, 'Lucida Grande', sans-serif;
+  font-family: 'Pretendard JP', Inter, 'Lucida Grande', sans-serif;
 }
 
 img {

app/javascript/styles/mastodon/basics.scss

@@ -14,7 +14,7 @@ body {
   font-weight: 400;
   color: $primary-text-color;
   text-rendering: optimizelegibility;
-  font-feature-settings: 'kern';
+  font-feature-settings: 'kern', 'ss55';
   text-size-adjust: none;
   -webkit-tap-highlight-color: rgba(0, 0, 0, 0%);
   -webkit-tap-highlight-color: transparent;

app/javascript/styles/mastodon/variables.scss

@@ -10,6 +10,7 @@ $blurple-300: #858afa; // Faded Blue
 $grey-600: hsl(240deg, 8%, 33%); // Trout
 $grey-100: hsl(240deg, 51%, 90%); // Topaz
 
+$success-green: #79bd9a !default; // Padua
 $success-green: #79bd9a !default; // Padua
 $error-red: $red-500 !default; // Cerise
 $warning-red: #ff5050 !default; // Sunset Orange
@@ -90,7 +91,7 @@ $media-modal-media-max-height: 80%;
 $no-gap-breakpoint: 1175px;
 $mobile-breakpoint: 630px;
 
-$font-sans-serif: 'mastodon-font-sans-serif' !default;
+$font-sans-serif: 'Pretendard JP' !default;
 $font-display: 'mastodon-font-display' !default;
 $font-monospace: 'mastodon-font-monospace' !default;