diff --git a/src/userstyles.yml b/src/userstyles.yml
index dd44b7a..acfb482 100644
--- a/src/userstyles.yml
+++ b/src/userstyles.yml
@@ -293,6 +293,12 @@ userstyles:
     readme:
       app-link: "https://github.com/searxng/searxng"
       current-maintainers: [*sekki21956, *ryanccn]
+  substack:
+    name: Substack
+    category: social
+    readme:
+      app-link: "https://substack.com"
+      current-maintainers: [*winston]
   tutanota:
     name: Tutanota
     category: productivity
diff --git a/styles/substack/assets/catwalk.webp b/styles/substack/assets/catwalk.webp
new file mode 100644
index 0000000..6c4cafa
--- /dev/null
+++ b/styles/substack/assets/catwalk.webp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:938ff1118859e61e4034c4a3dd753d0a52d12b5e627ffa6caf0d1695c3c64837
+size 447708
diff --git a/styles/substack/assets/frappe.webp b/styles/substack/assets/frappe.webp
new file mode 100644
index 0000000..ecfe7fd
--- /dev/null
+++ b/styles/substack/assets/frappe.webp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0d102511135ceee31e8834f301720740fd8c49501415579e21cd8307e8da8dd8
+size 398320
diff --git a/styles/substack/assets/latte.webp b/styles/substack/assets/latte.webp
new file mode 100644
index 0000000..0bf266f
--- /dev/null
+++ b/styles/substack/assets/latte.webp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:58da45e27abbed50db07f8fce9d406b4ded3d436c28a9cead3aead3f1a12a2c1
+size 404810
diff --git a/styles/substack/assets/macchiato.webp b/styles/substack/assets/macchiato.webp
new file mode 100644
index 0000000..6a0484b
--- /dev/null
+++ b/styles/substack/assets/macchiato.webp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:38f19104d501b2ed56bfcbc0f22f08a4bd7bc783625b0c50540b524dde49c54c
+size 411350
diff --git a/styles/substack/assets/mocha.webp b/styles/substack/assets/mocha.webp
new file mode 100644
index 0000000..16d3208
--- /dev/null
+++ b/styles/substack/assets/mocha.webp
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c3f2be5053c8ad4645ae2eda6355965728e5c449935c1510554bbedf534d6df9
+size 405736
diff --git a/styles/substack/catppuccin.user.css b/styles/substack/catppuccin.user.css
new file mode 100644
index 0000000..010bb4a
--- /dev/null
+++ b/styles/substack/catppuccin.user.css
@@ -0,0 +1,162 @@
+/* ==UserStyle==
+@name Substack Catppuccin
+@namespace github.com/catppuccin/userstyles/styles/substack
+@homepageURL https://github.com/catppuccin/userstyles/tree/main/styles/substack
+@version 0.1.0
+@description Soothing pastel theme for Substack
+@updateURL https://github.com/catppuccin/userstyles/raw/main/styles/substack/catppuccin.user.css
+@author Catppuccin
+@license MIT
+
+@preprocessor less
+@var select lightFlavor "Light Flavor" ["latte:Latte*", "frappe:Frappé", "macchiato:Macchiato", "mocha:Mocha"]
+@var select darkFlavor  "Dark Flavor" ["latte:Latte", "frappe:Frappé", "macchiato:Macchiato", "mocha:Mocha*"]
+@var select accentColor "Accent" ["rosewater:Rosewater", "flamingo:Flamingo", "pink:Pink", "mauve:Mauve", "red:Red", "maroon:Maroon", "peach:Peach", "yellow:Yellow", "green:Green", "teal:Teal", "blue:Blue", "sapphire:Sapphire*", "sky:Sky", "lavender:Lavender", "subtext0:Gray"]
+==/UserStyle== */
+@-moz-document regexp("https:\/\/(.+\.)?substack.com/.*") {
+  #catppuccin(@lookup, @accent-color) {
+    @rosewater: @catppuccin[@@lookup][@rosewater];
+    @flamingo: @catppuccin[@@lookup][@flamingo];
+    @pink: @catppuccin[@@lookup][@pink];
+    @mauve: @catppuccin[@@lookup][@mauve];
+    @red: @catppuccin[@@lookup][@red];
+    @maroon: @catppuccin[@@lookup][@maroon];
+    @peach: @catppuccin[@@lookup][@peach];
+    @yellow: @catppuccin[@@lookup][@yellow];
+    @green: @catppuccin[@@lookup][@green];
+    @teal: @catppuccin[@@lookup][@teal];
+    @sky: @catppuccin[@@lookup][@sky];
+    @sapphire: @catppuccin[@@lookup][@sapphire];
+    @blue: @catppuccin[@@lookup][@blue];
+    @lavender: @catppuccin[@@lookup][@lavender];
+    @text: @catppuccin[@@lookup][@text];
+    @subtext1: @catppuccin[@@lookup][@subtext1];
+    @subtext0: @catppuccin[@@lookup][@subtext0];
+    @overlay2: @catppuccin[@@lookup][@overlay2];
+    @overlay1: @catppuccin[@@lookup][@overlay1];
+    @overlay0: @catppuccin[@@lookup][@overlay0];
+    @surface2: @catppuccin[@@lookup][@surface2];
+    @surface1: @catppuccin[@@lookup][@surface1];
+    @surface0: @catppuccin[@@lookup][@surface0];
+    @base: @catppuccin[@@lookup][@base];
+    @mantle: @catppuccin[@@lookup][@mantle];
+    @crust: @catppuccin[@@lookup][@crust];
+    @accent: @catppuccin[@@lookup][@@accent-color];
+
+    html {
+      background-color: @base !important;
+    }
+
+    :root,
+    .dark-mode {
+      --color-primary: @text;
+      --color-secondary: @subtext0;
+      --color-bg-primary: @base;
+      --color-bg-primary-rgb: #rgbify(@base) [];
+      --web_bg_color: @base;
+      --color-bg-primary-hover: mix(@surface0, @base, 50%);
+      --color-bg-secondary: @mantle;
+      --color-bg-tertiary: @crust;
+      --color-dark-bg-tertiary: @crust;
+      --color-dark-primary: @text;
+      --color-bg-elevated: @surface0;
+      --color-bg-elevated-hover: mix(@surface1, @surface0, 50%);
+      --color-accent-themed: @accent;
+      --color-bg-secondary-opacity: @surface0;
+      --color-bg-secondary-themed: @surface0;
+      --color-accent-inverse-themed: @crust;
+      --color-light-bg-primary: @crust;
+      --color-accent-primary: @accent;
+      --color-accent-substack: @accent;
+      --color-accent-blue: @blue;
+      --color-accent-red: @red;
+      --color-accent-purple: @mauve;
+      --color-accent-facebook: @blue;
+      --color-light-bg-primary: @crust;
+      --color-accent-error: @red;
+      --color-detail: @surface1;
+      --color-dark-bg-primary: @mantle;
+
+      // subdomains
+      --print_on_web_bg_color: @text;
+      --color-secondary-themed: @subtext0;
+      --print_secondary_on_web_bg_color: @subtext0;
+      --background_pop: @peach;
+      --print_pop: @peach;
+      --print_on_pop: @crust;
+      --print_secondary: @subtext0;
+      --web_bg_color: @base;
+      --color-tertiary: @crust;
+      --background_contrast_1: @crust;
+      --background_contrast_2: mix(@crust, @mantle, 50%);
+      --background_contrast_3: @mantle;
+      --background_contrast_4: mix(@mantle, @base, 33%);
+      --background_contrast_5: mix(@mantle, @base, 66%);
+      --color_theme_bg_contrast_1: @surface0;
+      --color_theme_bg_contrast_2: mix(@surface0, @surface1, 50%);
+      --color_theme_bg_contrast_3: @surface1;
+      --color_theme_bg_contrast_4: mix(@surface1, @surface2, 50%);
+      --color_theme_bg_contrast_5: @surface2;
+
+      // used for podcast play controls
+      --color_theme_bg_pop_rgb: #rgbify(@accent) [];
+      --color_theme_print_on_pop: @crust;
+    }
+
+    // brand colors in SVGs
+    // Substack orange
+    *[stroke="#ff6719"],
+    *[stroke="#FF6719"] {
+      stroke: @peach !important;
+    }
+    *[fill="#ff6719"],
+    *[fill="#FF6719"] {
+      fill: @peach !important;
+    }
+
+    .footer-wrap .footer .footer-substack-cta {
+      background-color: @base;
+    }
+
+    .reader-nav-top.pinned {
+      background-color: rgba(#rgbify(@base) [], 85%);
+      backdrop-filter: var(--glass);
+    }
+
+    // toggle switches
+    .tailwind-preflight button span {
+      background-color: @base !important;
+    }
+
+    // restack quote popup
+    div[class*="frontend-components-selection_popover-module"] {
+      * {
+        color: @text !important;
+        background: @base !important;
+        border-color: @surface0 !important;
+        stroke: @text !important;
+      }
+    }
+  }
+
+  @media (prefers-color-scheme: dark) {
+    #catppuccin(@darkFlavor, @accentColor);
+  }
+  @media (prefers-color-scheme: light) {
+    #catppuccin(@lightFlavor, @accentColor);
+  }
+
+  #rgbify(@color) {
+    @rgb-raw: red(@color), green(@color), blue(@color);
+  }
+
+  // prettier-ignore
+  @catppuccin: {
+    @latte: { @rosewater: #dc8a78; @flamingo: #dd7878; @pink: #ea76cb; @mauve: #8839ef; @red: #d20f39; @maroon: #e64553; @peach: #fe640b; @yellow: #df8e1d; @green: #40a02b; @teal: #179299; @sky: #04a5e5; @sapphire: #209fb5; @blue: #1e66f5; @lavender: #7287fd; @text: #4c4f69; @subtext1: #5c5f77; @subtext0: #6c6f85; @overlay2: #7c7f93; @overlay1: #8c8fa1; @overlay0: #9ca0b0; @surface2: #acb0be; @surface1: #bcc0cc; @surface0: #ccd0da; @base: #eff1f5; @mantle: #e6e9ef; @crust: #dce0e8; };
+    @frappe: { @rosewater: #f2d5cf; @flamingo: #eebebe; @pink: #f4b8e4; @mauve: #ca9ee6; @red: #e78284; @maroon: #ea999c; @peach: #ef9f76; @yellow: #e5c890; @green: #a6d189; @teal: #81c8be; @sky: #99d1db; @sapphire: #85c1dc; @blue: #8caaee; @lavender: #babbf1; @text: #c6d0f5; @subtext1: #b5bfe2; @subtext0: #a5adce; @overlay2: #949cbb; @overlay1: #838ba7; @overlay0: #737994; @surface2: #626880; @surface1: #51576d; @surface0: #414559; @base: #303446; @mantle: #292c3c; @crust: #232634; };
+    @macchiato: { @rosewater: #f4dbd6; @flamingo: #f0c6c6; @pink: #f5bde6; @mauve: #c6a0f6; @red: #ed8796; @maroon: #ee99a0; @peach: #f5a97f; @yellow: #eed49f; @green: #a6da95; @teal: #8bd5ca; @sky: #91d7e3; @sapphire: #7dc4e4; @blue: #8aadf4; @lavender: #b7bdf8; @text: #cad3f5; @subtext1: #b8c0e0; @subtext0: #a5adcb; @overlay2: #939ab7; @overlay1: #8087a2; @overlay0: #6e738d; @surface2: #5b6078; @surface1: #494d64; @surface0: #363a4f; @base: #24273a; @mantle: #1e2030; @crust: #181926; };
+    @mocha: { @rosewater: #f5e0dc; @flamingo: #f2cdcd; @pink: #f5c2e7; @mauve: #cba6f7; @red: #f38ba8; @maroon: #eba0ac; @peach: #fab387; @yellow: #f9e2af; @green: #a6e3a1; @teal: #94e2d5; @sky: #89dceb; @sapphire: #74c7ec; @blue: #89b4fa; @lavender: #b4befe; @text: #cdd6f4; @subtext1: #bac2de; @subtext0: #a6adc8; @overlay2: #9399b2; @overlay1: #7f849c; @overlay0: #6c7086; @surface2: #585b70; @surface1: #45475a; @surface0: #313244; @base: #1e1e2e; @mantle: #181825; @crust: #11111b; };
+  }
+}
+
+// vim:ft=less