feat: Add comprehensive theme management with mode and color selectors, alongside new fonts.

src/app/dashboard/settings/_components/color-theme-selector.tsx

@@ -0,0 +1,54 @@
+"use client";
+
+import { useTheme } from "next-themes";
+import { Check, Palette } from "lucide-react";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "~/components/ui/dropdown-menu";
+import { Button } from "~/components/ui/button";
+
+export function ColorThemeSelector() {
+  const { theme, setTheme } = useTheme();
+
+  const themes = [
+    { name: "theme-ocean", label: "Ocean" },
+    { name: "theme-sunset", label: "Sunset" },
+    { name: "theme-forest", label: "Forest" },
+  ];
+
+  const currentTheme = themes.find((t) => t.name === theme)?.label ?? "Ocean";
+
+  return (
+    <div className="flex items-center justify-between">
+      <div className="space-y-1.5">
+        <label className="font-medium">Color Theme</label>
+        <p className="text-muted-foreground text-xs leading-snug">
+          Select a color theme for the application.
+        </p>
+      </div>
+      <DropdownMenu>
+        <DropdownMenuTrigger asChild>
+          <Button variant="outline" className="w-40 justify-between">
+            <span>{currentTheme}</span>
+            <Palette className="h-4 w-4" />
+          </Button>
+        </DropdownMenuTrigger>
+        <DropdownMenuContent>
+          {themes.map((t) => (
+            <DropdownMenuItem
+              key={t.name}
+              className="flex justify-between"
+              onClick={() => setTheme(t.name)}
+            >
+              <span>{t.label}</span>
+              {theme === t.name && <Check className="h-4 w-4" />}
+            </DropdownMenuItem>
+          ))}
+        </DropdownMenuContent>
+      </DropdownMenu>
+    </div>
+  );
+}

src/app/dashboard/settings/_components/mode-switcher.tsx

@@ -0,0 +1,33 @@
+"use client";
+
+import { useTheme } from "next-themes";
+import { Sun, Moon, Laptop } from "lucide-react";
+import { Tabs, TabsList, TabsTrigger } from "~/components/ui/tabs";
+
+export function ModeSwitcher() {
+  const { theme, setTheme } = useTheme();
+
+  return (
+    <div className="flex items-center justify-between">
+       <div className="space-y-1.5">
+        <label className="font-medium">Appearance</label>
+        <p className="text-muted-foreground text-xs leading-snug">
+          Select a light or dark mode, or sync with your system.
+        </p>
+      </div>
+      <Tabs defaultValue={theme} onValueChange={setTheme} className="w-auto">
+        <TabsList>
+          <TabsTrigger value="light">
+            <Sun className="h-4 w-4" />
+          </TabsTrigger>
+          <TabsTrigger value="dark">
+            <Moon className="h-4 w-4" />
+          </TabsTrigger>
+          <TabsTrigger value="system">
+            <Laptop className="h-4 w-4" />
+          </TabsTrigger>
+        </TabsList>
+      </Tabs>
+    </div>
+  );
+}

src/app/dashboard/settings/_components/settings-content.tsx

@@ -62,7 +62,8 @@ import { Textarea } from "~/components/ui/textarea";
 import { api } from "~/trpc/react";
 import { Switch } from "~/components/ui/switch";
 import { Slider } from "~/components/ui/slider";
-import { ThemeSelector } from "./theme-selector";
+import { ModeSwitcher } from "./mode-switcher";
+import { ColorThemeSelector } from "./color-theme-selector";
 import { useAnimationPreferences } from "~/components/providers/animation-preferences-provider";
 
 export function SettingsContent() {
@@ -628,8 +629,9 @@ export function SettingsContent() {
             Customize the look and feel of the application
           </CardDescription>
         </CardHeader>
-        <CardContent>
-          <ThemeSelector />
+        <CardContent className="space-y-6">
+          <ModeSwitcher />
+          <ColorThemeSelector />
         </CardContent>
       </Card>
 

src/app/layout.tsx

@@ -2,7 +2,7 @@ import "~/styles/globals.css";
 
 import { Analytics } from "@vercel/analytics/next";
 import { type Metadata } from "next";
-import { Geist_Mono } from "next/font/google";
+import { Geist, Geist_Mono, Instrument_Serif } from "next/font/google";
 
 import { TRPCReactProvider } from "~/trpc/react";
 import { Toaster } from "~/components/ui/sonner";
@@ -17,17 +17,34 @@ export const metadata: Metadata = {
   icons: [{ rel: "icon", url: "/favicon.ico" }],
 };
 
+const geistSans = Geist({
+  subsets: ["latin"],
+  variable: "--font-geist-sans",
+  display: "swap",
+});
+
 const geistMono = Geist_Mono({
   subsets: ["latin"],
   variable: "--font-geist-mono",
   display: "swap",
 });
 
+const instrumentSerif = Instrument_Serif({
+  subsets: ["latin"],
+  variable: "--font-serif",
+  display: "swap",
+  weight: "400",
+});
+
 export default function RootLayout({
   children,
 }: Readonly<{ children: React.ReactNode }>) {
   return (
-    <html suppressHydrationWarning lang="en" className={geistMono.variable}>
+    <html
+      suppressHydrationWarning
+      lang="en"
+      className={`${geistSans.variable} ${geistMono.variable} ${instrumentSerif.variable}`}
+    >
       <head>
         {/* Inline early animation preference script to avoid FOUC */}
         <script
@@ -40,7 +57,7 @@ export default function RootLayout({
       <body className="bg-background text-foreground relative min-h-screen overflow-x-hidden font-sans antialiased">
         <ThemeProvider
           attribute="class"
-          defaultTheme="system"
+          defaultTheme="theme-ocean"
           enableSystem
           disableTransitionOnChange
         >

src/components/providers/theme-provider.tsx

@@ -8,7 +8,7 @@ export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
   return (
     <NextThemesProvider
       {...props}
-      themes={["light", "dark", "theme-sunset", "theme-forest"]}
+      themes={["light", "dark", "theme-ocean", "theme-sunset", "theme-forest"]}
     >
       {children}
     </NextThemesProvider>

src/styles/globals.css

@@ -1,8 +1,7 @@
 @import "tailwindcss";
 @import "tw-animate-css";
 
-:root {
-  --background: oklch(0.98 0.01 230);
+.theme-ocean {
   --foreground: oklch(0.2 0.03 230);
   --card: oklch(1 0 0);
   --card-foreground: oklch(0.2 0.03 230);
@@ -240,6 +239,80 @@
   --navbar-border: oklch(0.88 0.02 140);
 }
 
+.dark .theme-sunset {
+  --background: oklch(0.15 0.05 40);
+  --foreground: oklch(0.9 0.05 40);
+  --card: oklch(0.2 0.05 40);
+  --card-foreground: oklch(0.9 0.05 40);
+  --popover: oklch(0.22 0.05 40);
+  --popover-foreground: oklch(0.9 0.05 40);
+  --primary: oklch(0.7 0.2 50);
+  --primary-foreground: oklch(0.1 0.05 40);
+  --secondary: oklch(0.25 0.05 40);
+  --secondary-foreground: oklch(0.9 0.05 40);
+  --muted: oklch(0.25 0.05 40);
+  --muted-foreground: oklch(0.7 0.05 40);
+  --accent: oklch(0.3 0.05 40);
+  --accent-foreground: oklch(0.9 0.05 40);
+  --destructive: oklch(0.7 0.19 22);
+  --destructive-foreground: oklch(0.2 0.05 40);
+  --success: oklch(0.6 0.15 142);
+  --success-foreground: oklch(0.98 0.01 140);
+  --warning: oklch(0.7 0.15 38);
+  --warning-foreground: oklch(0.2 0.05 40);
+  --border: oklch(0.28 0.05 40);
+  --input: oklch(0.35 0.05 40);
+  --ring: oklch(0.7 0.2 50);
+  --sidebar: oklch(0.1 0.05 40);
+  --sidebar-foreground: oklch(0.9 0.05 40);
+  --sidebar-primary: oklch(0.9 0.05 40);
+  --sidebar-primary-foreground: oklch(0.1 0.05 40);
+  --sidebar-accent: oklch(0.2 0.05 40);
+  --sidebar-accent-foreground: oklch(0.9 0.05 40);
+  --sidebar-border: oklch(0.25 0.05 40);
+  --sidebar-ring: oklch(0.35 0.05 40);
+  --navbar: oklch(0.1 0.05 40);
+  --navbar-foreground: oklch(0.9 0.05 40);
+  --navbar-border: oklch(0.25 0.05 40);
+}
+
+.dark .theme-forest {
+  --background: oklch(0.15 0.05 140);
+  --foreground: oklch(0.9 0.05 140);
+  --card: oklch(0.2 0.05 140);
+  --card-foreground: oklch(0.9 0.05 140);
+  --popover: oklch(0.22 0.05 140);
+  --popover-foreground: oklch(0.9 0.05 140);
+  --primary: oklch(0.5 0.1 150);
+  --primary-foreground: oklch(0.1 0.05 140);
+  --secondary: oklch(0.25 0.05 140);
+  --secondary-foreground: oklch(0.9 0.05 140);
+  --muted: oklch(0.25 0.05 140);
+  --muted-foreground: oklch(0.7 0.05 140);
+  --accent: oklch(0.3 0.05 140);
+  --accent-foreground: oklch(0.9 0.05 140);
+  --destructive: oklch(0.7 0.19 22);
+  --destructive-foreground: oklch(0.2 0.05 140);
+  --success: oklch(0.6 0.15 142);
+  --success-foreground: oklch(0.98 0.01 140);
+  --warning: oklch(0.7 0.15 38);
+  --warning-foreground: oklch(0.2 0.05 140);
+  --border: oklch(0.28 0.05 140);
+  --input: oklch(0.35 0.05 140);
+  --ring: oklch(0.5 0.1 150);
+  --sidebar: oklch(0.1 0.05 140);
+  --sidebar-foreground: oklch(0.9 0.05 140);
+  --sidebar-primary: oklch(0.9 0.05 140);
+  --sidebar-primary-foreground: oklch(0.1 0.05 140);
+  --sidebar-accent: oklch(0.2 0.05 140);
+  --sidebar-accent-foreground: oklch(0.9 0.05 140);
+  --sidebar-border: oklch(0.25 0.05 140);
+  --sidebar-ring: oklch(0.35 0.05 140);
+  --navbar: oklch(0.1 0.05 140);
+  --navbar-foreground: oklch(0.9 0.05 140);
+  --navbar-border: oklch(0.25 0.05 140);
+}
+
 @theme inline {
   --color-background: var(--background);
   --color-foreground: var(--foreground);