diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3c5cc7..38b64fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,7 @@
 * Focus important fields on forms
 * Improve session list (https://git.kucharczyk.xyz/lukas/timetracker/issues/53)
 * Change fonts to IBM Plex
-* Only use local font files
+* Only use local WOFF2 font files
 
 ## 1.0.3 / 2023-02-20 17:16+01:00
 
diff --git a/common/input.css b/common/input.css
index 18bb86e..3be0629 100644
--- a/common/input.css
+++ b/common/input.css
@@ -4,14 +4,21 @@
 
 @font-face {
   font-family: "IBM Plex Mono";
-  src: url("fonts/IBMPlexMono-regular.ttf") format("truetype");
+  src: url("fonts/IBMPlexMono-regular.woff2") format("woff2");
   font-weight: 400;
   font-style: normal;
 }
 
 @font-face {
   font-family: "IBM Plex Sans";
-  src: url("fonts/IBMPlexSans-Regular.ttf") format("truetype");
+  src: url("fonts/IBMPlexSans-Regular.woff2") format("woff2");
+  font-weight: 400;
+  font-style: normal;
+}
+
+@font-face {
+  font-family: "IBM Plex Serif";
+  src: url("fonts/IBMPlexSerif-Regular.woff2") format("woff2");
   font-weight: 400;
   font-style: normal;
 }
diff --git a/games/static/base.css b/games/static/base.css
index 9466cbb..e53d77e 100644
--- a/games/static/base.css
+++ b/games/static/base.css
@@ -785,10 +785,6 @@ select {
   margin-bottom: 1rem;
 }
 
-.ml-1 {
-  margin-left: 0.25rem;
-}
-
 .mr-4 {
   margin-right: 1rem;
 }
@@ -817,14 +813,6 @@ select {
   display: none;
 }
 
-.h-4 {
-  height: 1rem;
-}
-
-.h-5 {
-  height: 1.25rem;
-}
-
 .h-6 {
   height: 1.5rem;
 }
@@ -833,22 +821,10 @@ select {
   min-height: 100vh;
 }
 
-.w-4 {
-  width: 1rem;
-}
-
-.w-5 {
-  width: 1.25rem;
-}
-
 .w-6 {
   width: 1.5rem;
 }
 
-.w-7 {
-  width: 1.75rem;
-}
-
 .w-full {
   width: 100%;
 }
@@ -883,14 +859,6 @@ select {
   align-items: center;
 }
 
-.justify-end {
-  justify-content: flex-end;
-}
-
-.justify-center {
-  justify-content: center;
-}
-
 .justify-between {
   justify-content: space-between;
 }
@@ -899,20 +867,12 @@ select {
   align-self: center;
 }
 
-.overflow-hidden {
-  overflow: hidden;
-}
-
 .truncate {
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
 
-.text-ellipsis {
-  text-overflow: ellipsis;
-}
-
 .whitespace-nowrap {
   white-space: nowrap;
 }
@@ -930,21 +890,11 @@ select {
   border-color: rgb(229 231 235 / var(--tw-border-opacity));
 }
 
-.bg-blue-600 {
-  --tw-bg-opacity: 1;
-  background-color: rgb(37 99 235 / var(--tw-bg-opacity));
-}
-
 .bg-green-600 {
   --tw-bg-opacity: 1;
   background-color: rgb(22 163 74 / var(--tw-bg-opacity));
 }
 
-.bg-red-600 {
-  --tw-bg-opacity: 1;
-  background-color: rgb(220 38 38 / var(--tw-bg-opacity));
-}
-
 .bg-white {
   --tw-bg-opacity: 1;
   background-color: rgb(255 255 255 / var(--tw-bg-opacity));
@@ -985,6 +935,14 @@ select {
   font-family: IBM Plex Mono, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
 }
 
+.font-serif {
+  font-family: IBM Plex Serif, ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
+}
+
+.font-sans {
+  font-family: IBM Plex Sans, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+}
+
 .text-4xl {
   font-size: 2.25rem;
   line-height: 2.5rem;
@@ -1005,13 +963,55 @@ select {
   line-height: 1rem;
 }
 
+.text-2xl {
+  font-size: 1.5rem;
+  line-height: 2rem;
+}
+
+.text-9xl {
+  font-size: 8rem;
+  line-height: 1;
+}
+
+.text-8xl {
+  font-size: 6rem;
+  line-height: 1;
+}
+
+.text-7xl {
+  font-size: 4.5rem;
+  line-height: 1;
+}
+
+.text-6xl {
+  font-size: 3.75rem;
+  line-height: 1;
+}
+
+.text-5xl {
+  font-size: 3rem;
+  line-height: 1;
+}
+
+.text-lg {
+  font-size: 1.125rem;
+  line-height: 1.75rem;
+}
+
 .font-semibold {
   font-weight: 600;
 }
 
-.text-red-400 {
-  --tw-text-opacity: 1;
-  color: rgb(248 113 113 / var(--tw-text-opacity));
+.font-bold {
+  font-weight: 700;
+}
+
+.capitalize {
+  text-transform: capitalize;
+}
+
+.italic {
+  font-style: italic;
 }
 
 .text-slate-300 {
@@ -1047,12 +1047,6 @@ select {
   transition-duration: 150ms;
 }
 
-.transition-all {
-  transition-property: all;
-  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
-  transition-duration: 150ms;
-}
-
 .duration-200 {
   transition-duration: 200ms;
 }
@@ -1072,7 +1066,7 @@ select {
 @font-face {
   font-family: "IBM Plex Mono";
 
-  src: url("fonts/IBMPlexMono-regular.ttf") format("truetype");
+  src: url("fonts/IBMPlexMono-regular.woff2") format("woff2");
 
   font-weight: 400;
 
@@ -1082,7 +1076,17 @@ select {
 @font-face {
   font-family: "IBM Plex Sans";
 
-  src: url("fonts/IBMPlexSans-Regular.ttf") format("truetype");
+  src: url("fonts/IBMPlexSans-Regular.woff2") format("woff2");
+
+  font-weight: 400;
+
+  font-style: normal;
+}
+
+@font-face {
+  font-family: "IBM Plex Serif";
+
+  src: url("fonts/IBMPlexSerif-Regular.woff2") format("woff2");
 
   font-weight: 400;
 
@@ -1237,21 +1241,11 @@ th label {
   box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
 }
 
-.hover\:bg-blue-700:hover {
-  --tw-bg-opacity: 1;
-  background-color: rgb(29 78 216 / var(--tw-bg-opacity));
-}
-
 .hover\:bg-green-700:hover {
   --tw-bg-opacity: 1;
   background-color: rgb(21 128 61 / var(--tw-bg-opacity));
 }
 
-.hover\:bg-red-700:hover {
-  --tw-bg-opacity: 1;
-  background-color: rgb(185 28 28 / var(--tw-bg-opacity));
-}
-
 .hover\:underline:hover {
   text-decoration-line: underline;
 }
@@ -1267,21 +1261,11 @@ th label {
   box-shadow: var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow, 0 0 #0000);
 }
 
-.focus\:ring-blue-500:focus {
-  --tw-ring-opacity: 1;
-  --tw-ring-color: rgb(59 130 246 / var(--tw-ring-opacity));
-}
-
 .focus\:ring-green-500:focus {
   --tw-ring-opacity: 1;
   --tw-ring-color: rgb(34 197 94 / var(--tw-ring-opacity));
 }
 
-.focus\:ring-red-500:focus {
-  --tw-ring-opacity: 1;
-  --tw-ring-color: rgb(239 68 68 / var(--tw-ring-opacity));
-}
-
 .focus\:ring-offset-2:focus {
   --tw-ring-offset-width: 2px;
 }
@@ -1300,11 +1284,6 @@ th label {
   background-color: rgb(17 24 39 / var(--tw-bg-opacity));
 }
 
-:is(.dark .dark\:text-slate-400) {
-  --tw-text-opacity: 1;
-  color: rgb(148 163 184 / var(--tw-text-opacity));
-}
-
 :is(.dark .dark\:text-slate-600) {
   --tw-text-opacity: 1;
   color: rgb(71 85 105 / var(--tw-text-opacity));
diff --git a/games/static/fonts/IBMPlexMono-Regular.ttf b/games/static/fonts/IBMPlexMono-Regular.ttf
deleted file mode 100644
index 81ca3dc..0000000
Binary files a/games/static/fonts/IBMPlexMono-Regular.ttf and /dev/null differ
diff --git a/games/static/fonts/IBMPlexMono-Regular.woff2 b/games/static/fonts/IBMPlexMono-Regular.woff2
new file mode 100644
index 0000000..84c87e0
Binary files /dev/null and b/games/static/fonts/IBMPlexMono-Regular.woff2 differ
diff --git a/games/static/fonts/IBMPlexSans-Regular.ttf b/games/static/fonts/IBMPlexSans-Regular.ttf
deleted file mode 100644
index b581964..0000000
Binary files a/games/static/fonts/IBMPlexSans-Regular.ttf and /dev/null differ
diff --git a/games/static/fonts/IBMPlexSans-Regular.woff2 b/games/static/fonts/IBMPlexSans-Regular.woff2
new file mode 100644
index 0000000..739bc68
Binary files /dev/null and b/games/static/fonts/IBMPlexSans-Regular.woff2 differ
diff --git a/games/static/fonts/IBMPlexSerif-Regular.woff2 b/games/static/fonts/IBMPlexSerif-Regular.woff2
new file mode 100644
index 0000000..f295ba8
Binary files /dev/null and b/games/static/fonts/IBMPlexSerif-Regular.woff2 differ
diff --git a/tailwind.config.js b/tailwind.config.js
index f21b94d..8047bc1 100644
--- a/tailwind.config.js
+++ b/tailwind.config.js
@@ -8,6 +8,7 @@ module.exports = {
           fontFamily: {
             'sans': ['IBM Plex Sans', ...defaultTheme.fontFamily.sans],
             'mono': ['IBM Plex Mono', ...defaultTheme.fontFamily.mono],
+            'serif': ['IBM Plex Serif', ...defaultTheme.fontFamily.serif],
           }
         },
     },