diff --git a/client/src/components/layout/NavHeader.tsx b/client/src/components/layout/NavHeader.tsx
index b782a80..3cd1efd 100644
--- a/client/src/components/layout/NavHeader.tsx
+++ b/client/src/components/layout/NavHeader.tsx
@@ -9,6 +9,7 @@ import {
   DropdownMenuItem,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
+import { SeasonSelector } from "@/components/ui/season-selector";
 
 export function NavHeader() {
   const { theme, setTheme } = useTheme();
@@ -76,6 +77,8 @@ export function NavHeader() {
             </DropdownMenuContent>
           </DropdownMenu>
           
+          <SeasonSelector />
+          
           <div className="h-6 w-px bg-accent/20 dark:bg-accent/20 mx-1"></div>
           
           <Link href="/profile">
diff --git a/client/src/components/ui/season-selector.tsx b/client/src/components/ui/season-selector.tsx
new file mode 100644
index 0000000..2572ece
--- /dev/null
+++ b/client/src/components/ui/season-selector.tsx
@@ -0,0 +1,65 @@
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { useSeason } from "@/hooks/use-season";
+import { Leaf, Sun, Umbrella, Snowflake } from "lucide-react";
+
+interface SeasonSelectorProps {
+  className?: string;
+}
+
+export function SeasonSelector({ className }: SeasonSelectorProps) {
+  const { season, setSeason } = useSeason();
+
+  const getIcon = () => {
+    switch (season) {
+      case "spring":
+        return <Leaf className="h-5 w-5" />;
+      case "summer":
+        return <Sun className="h-5 w-5" />;
+      case "autumn":
+        return <Umbrella className="h-5 w-5" />;
+      case "winter":
+        return <Snowflake className="h-5 w-5" />;
+      default:
+        return <Leaf className="h-5 w-5" />;
+    }
+  };
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button
+          variant="ghost"
+          size="icon"
+          className={`p-2 rounded-full text-foreground/70 dark:text-foreground/70 hover:bg-accent/20 dark:hover:bg-accent/20 ${className}`}
+        >
+          {getIcon()}
+          <span className="sr-only">Change season theme</span>
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end">
+        <DropdownMenuItem onClick={() => setSeason("spring")}>
+          <Leaf className="mr-2 h-4 w-4" />
+          <span>Spring</span>
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setSeason("summer")}>
+          <Sun className="mr-2 h-4 w-4" />
+          <span>Summer</span>
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setSeason("autumn")}>
+          <Umbrella className="mr-2 h-4 w-4" />
+          <span>Autumn</span>
+        </DropdownMenuItem>
+        <DropdownMenuItem onClick={() => setSeason("winter")}>
+          <Snowflake className="mr-2 h-4 w-4" />
+          <span>Winter</span>
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}
diff --git a/client/src/hooks/use-season.tsx b/client/src/hooks/use-season.tsx
new file mode 100644
index 0000000..5fb80b2
--- /dev/null
+++ b/client/src/hooks/use-season.tsx
@@ -0,0 +1,44 @@
+import { createContext, useContext, useEffect, useState } from "react";
+
+type Season = "spring" | "summer" | "autumn" | "winter";
+
+interface SeasonContextProps {
+  season: Season;
+  setSeason: (season: Season) => void;
+}
+
+const defaultSeason: Season = "spring";
+
+const SeasonContext = createContext<SeasonContextProps>({
+  season: defaultSeason,
+  setSeason: () => {},
+});
+
+export function SeasonProvider({ children }: { children: React.ReactNode }) {
+  const [season, setSeason] = useState<Season>(() => {
+    // Try to get the saved season from localStorage
+    if (typeof window !== 'undefined') {
+      const savedSeason = localStorage.getItem("season") as Season;
+      return savedSeason || defaultSeason;
+    }
+    return defaultSeason;
+  });
+
+  useEffect(() => {
+    // Apply the season class to the document element
+    const html = document.documentElement;
+    html.classList.remove("spring", "summer", "autumn", "winter");
+    html.classList.add(season);
+    
+    // Save the current season to localStorage
+    localStorage.setItem("season", season);
+  }, [season]);
+
+  return (
+    <SeasonContext.Provider value={{ season, setSeason }}>
+      {children}
+    </SeasonContext.Provider>
+  );
+}
+
+export const useSeason = () => useContext(SeasonContext);
diff --git a/client/src/index.css b/client/src/index.css
index f13b04d..abca8dd 100644
--- a/client/src/index.css
+++ b/client/src/index.css
@@ -4,84 +4,328 @@
 @tailwind components;
 @tailwind utilities;
 
+/**
+ * Base Theme Definition
+ * These variables serve as shared values across all seasonal themes
+ */
 :root {
-  --background: 180 7% 97%;
-  --foreground: 0 0% 20%;
-  
-  --muted: 180 7% 94%;
-  --muted-foreground: 0 0% 45%;
-  
-  --popover: 180 7% 97%;
-  --popover-foreground: 0 0% 20%;
-  
-  --card: 180 7% 97%;
-  --card-foreground: 0 0% 20%;
-  
-  --border: 174 10% 80%;
-  --input: 174 10% 80%;
-  
-  --primary: 174 40% 24%;
-  --primary-foreground: 0 0% 100%;
-  
-  --secondary: 180 7% 94%;
-  --secondary-foreground: 0 0% 20%;
-  
-  --accent: 174 30% 40%;
-  --accent-foreground: 0 0% 100%;
+  --radius: 0.5rem;
   
+  /* Default destructive/error colors that aren't seasonal */
   --destructive: 0 84.2% 60.2%;
   --destructive-foreground: 0 0% 100%;
   
-  --ring: 174 40% 24%;
-  
-  --radius: 0.5rem;
-  
-  /* Custom theme colors */
-  --cream: 180 7% 97%;
-  --navy: 174 40% 24%;
-  --russet: 0 60% 45%;
-  --sage: 174 30% 35%;
-  --ink: 0 0% 20%;
-  --paper: 180 7% 94%;
+  /* Content width variables */
+  --content-width: min(90%, 1200px);
+  --reading-width: min(90%, 700px);
 }
 
-.dark {
-  --background: 174 20% 12%;
-  --foreground: 0 0% 90%;
+/**
+ * Spring Theme 🌱
+ * Fresh, vibrant green palette inspired by new growth
+ */
+.spring {
+  /* Main colors */
+  --background: 120 30% 96%;
+  --foreground: 120 15% 15%;
   
-  --muted: 174 20% 18%;
-  --muted-foreground: 0 0% 70%;
+  --muted: 120 20% 92%; 
+  --muted-foreground: 120 10% 40%;
   
-  --popover: 174 20% 14%;
-  --popover-foreground: 0 0% 90%;
+  --popover: 120 30% 96%;
+  --popover-foreground: 120 15% 15%;
   
-  --card: 174 20% 14%;
-  --card-foreground: 0 0% 90%;
+  --card: 120 30% 97%;
+  --card-foreground: 120 15% 15%;
   
-  --border: 174 15% 25%;
-  --input: 174 15% 25%;
+  --border: 120 30% 85%;
+  --input: 120 30% 85%;
   
-  --primary: 174 35% 45%;
-  --primary-foreground: 0 0% 100%;
+  --primary: 142 50% 30%;
+  --primary-foreground: 120 54% 95%;
   
-  --secondary: 174 20% 20%;
-  --secondary-foreground: 0 0% 90%;
+  --secondary: 120 20% 92%;
+  --secondary-foreground: 120 15% 15%;
   
-  --accent: 174 40% 45%;
-  --accent-foreground: 0 0% 100%;
+  --accent: 142 76% 45%;
+  --accent-foreground: 120 54% 98%;
   
-  --destructive: 0 62.8% 30.6%;
-  --destructive-foreground: 0 0% 100%;
+  --ring: 142 50% 30%;
   
-  --ring: 174 40% 45%;
+  /* Legacy semantic colors for backward compatibility */
+  --cream: 120 30% 96%;
+  --navy: 142 50% 30%;
+  --russet: 22 80% 50%;
+  --sage: 142 40% 55%;
+  --ink: 120 15% 15%;
+  --paper: 120 20% 92%;
+}
+
+.spring.dark {
+  --background: 143 30% 12%;
+  --foreground: 120 15% 90%;
   
-  /* Custom theme colors */
-  --cream: 0 0% 90%;
-  --navy: 174 35% 45%;
+  --muted: 143 25% 18%;
+  --muted-foreground: 120 10% 70%;
+  
+  --popover: 143 30% 14%;
+  --popover-foreground: 120 15% 90%;
+  
+  --card: 143 30% 14%;
+  --card-foreground: 120 15% 90%;
+  
+  --border: 143 25% 25%;
+  --input: 143 25% 25%;
+  
+  --primary: 142 75% 45%;
+  --primary-foreground: 120 54% 98%;
+  
+  --secondary: 143 25% 20%;
+  --secondary-foreground: 120 15% 90%;
+  
+  --accent: 142 75% 45%;
+  --accent-foreground: 120 54% 98%;
+  
+  --ring: 142 75% 45%;
+  
+  /* Legacy semantic colors for backward compatibility */
+  --cream: 120 15% 90%;
+  --navy: 142 75% 45%;
+  --russet: 22 70% 55%;
+  --sage: 142 60% 45%;
+  --ink: 120 15% 90%;
+  --paper: 143 25% 18%;
+}
+
+/**
+ * Summer Theme ☀️
+ * Warm, sunny palette with amber and gold tones
+ */
+.summer {
+  /* Main colors */
+  --background: 48 30% 96%;
+  --foreground: 30 15% 15%;
+  
+  --muted: 48 20% 92%;
+  --muted-foreground: 30 10% 40%;
+  
+  --popover: 48 30% 96%;
+  --popover-foreground: 30 15% 15%;
+  
+  --card: 48 30% 97%;
+  --card-foreground: 30 15% 15%;
+  
+  --border: 48 30% 85%;
+  --input: 48 30% 85%;
+  
+  --primary: 36 80% 40%;
+  --primary-foreground: 48 54% 98%;
+  
+  --secondary: 48 20% 92%;
+  --secondary-foreground: 30 15% 15%;
+  
+  --accent: 36 80% 50%;
+  --accent-foreground: 48 54% 98%;
+  
+  --ring: 36 80% 40%;
+  
+  /* Legacy semantic colors */
+  --cream: 48 30% 96%;
+  --navy: 36 80% 40%;
+  --russet: 16 80% 55%;
+  --sage: 54 60% 45%;
+  --ink: 30 15% 15%;
+  --paper: 48 20% 92%;
+}
+
+.summer.dark {
+  --background: 36 30% 12%;
+  --foreground: 48 15% 90%;
+  
+  --muted: 36 25% 18%;
+  --muted-foreground: 30 10% 70%;
+  
+  --popover: 36 30% 14%;
+  --popover-foreground: 48 15% 90%;
+  
+  --card: 36 30% 14%;
+  --card-foreground: 48 15% 90%;
+  
+  --border: 36 25% 25%;
+  --input: 36 25% 25%;
+  
+  --primary: 36 70% 55%;
+  --primary-foreground: 48 54% 98%;
+  
+  --secondary: 36 25% 20%;
+  --secondary-foreground: 48 15% 90%;
+  
+  --accent: 36 70% 55%;
+  --accent-foreground: 48 54% 98%;
+  
+  --ring: 36 70% 55%;
+  
+  /* Legacy semantic colors */
+  --cream: 48 15% 90%;
+  --navy: 36 70% 55%;
+  --russet: 16 70% 60%;
+  --sage: 54 50% 50%;
+  --ink: 48 15% 90%;
+  --paper: 36 25% 18%;
+}
+
+/**
+ * Autumn Theme 🍂
+ * Rich, earthy palette with warm reds and oranges
+ */
+.autumn {
+  /* Main colors */
+  --background: 24 30% 96%;
+  --foreground: 24 15% 15%;
+  
+  --muted: 24 20% 92%;
+  --muted-foreground: 18 10% 40%;
+  
+  --popover: 24 30% 96%;
+  --popover-foreground: 24 15% 15%;
+  
+  --card: 24 30% 97%;
+  --card-foreground: 24 15% 15%;
+  
+  --border: 24 30% 85%;
+  --input: 24 30% 85%;
+  
+  --primary: 18 75% 35%;
+  --primary-foreground: 24 54% 98%;
+  
+  --secondary: 24 20% 92%;
+  --secondary-foreground: 24 15% 15%;
+  
+  --accent: 18 75% 45%;
+  --accent-foreground: 24 54% 98%;
+  
+  --ring: 18 75% 35%;
+  
+  /* Legacy semantic colors */
+  --cream: 24 30% 96%;
+  --navy: 18 75% 35%;
+  --russet: 12 80% 45%;
+  --sage: 36 60% 45%;
+  --ink: 24 15% 15%;
+  --paper: 24 20% 92%;
+}
+
+.autumn.dark {
+  --background: 18 30% 12%;
+  --foreground: 24 15% 90%;
+  
+  --muted: 18 25% 18%;
+  --muted-foreground: 18 10% 70%;
+  
+  --popover: 18 30% 14%;
+  --popover-foreground: 24 15% 90%;
+  
+  --card: 18 30% 14%;
+  --card-foreground: 24 15% 90%;
+  
+  --border: 18 25% 25%;
+  --input: 18 25% 25%;
+  
+  --primary: 18 65% 50%;
+  --primary-foreground: 24 54% 98%;
+  
+  --secondary: 18 25% 20%;
+  --secondary-foreground: 24 15% 90%;
+  
+  --accent: 18 65% 50%;
+  --accent-foreground: 24 54% 98%;
+  
+  --ring: 18 65% 50%;
+  
+  /* Legacy semantic colors */
+  --cream: 24 15% 90%;
+  --navy: 18 65% 50%;
+  --russet: 12 70% 50%;
+  --sage: 36 50% 50%;
+  --ink: 24 15% 90%;
+  --paper: 18 25% 18%;
+}
+
+/**
+ * Winter Theme ❄️
+ * Cool, crisp palette with blues and silvers
+ */
+.winter {
+  /* Main colors */
+  --background: 210 30% 97%;
+  --foreground: 210 15% 15%;
+  
+  --muted: 210 20% 93%;
+  --muted-foreground: 210 10% 40%;
+  
+  --popover: 210 30% 97%;
+  --popover-foreground: 210 15% 15%;
+  
+  --card: 210 30% 98%;
+  --card-foreground: 210 15% 15%;
+  
+  --border: 210 30% 85%;
+  --input: 210 30% 85%;
+  
+  --primary: 220 70% 35%;
+  --primary-foreground: 210 54% 98%;
+  
+  --secondary: 210 20% 93%;
+  --secondary-foreground: 210 15% 15%;
+  
+  --accent: 220 70% 45%;
+  --accent-foreground: 210 54% 98%;
+  
+  --ring: 220 70% 35%;
+  
+  /* Legacy semantic colors */
+  --cream: 210 30% 97%;
+  --navy: 220 70% 35%;
   --russet: 0 60% 50%;
-  --sage: 174 30% 40%;
-  --ink: 0 0% 90%;
-  --paper: 174 20% 16%;
+  --sage: 200 60% 45%;
+  --ink: 210 15% 15%;
+  --paper: 210 20% 93%;
+}
+
+.winter.dark {
+  --background: 220 30% 12%;
+  --foreground: 210 15% 90%;
+  
+  --muted: 220 25% 18%;
+  --muted-foreground: 210 10% 70%;
+  
+  --popover: 220 30% 14%;
+  --popover-foreground: 210 15% 90%;
+  
+  --card: 220 30% 14%;
+  --card-foreground: 210 15% 90%;
+  
+  --border: 220 25% 25%;
+  --input: 220 25% 25%;
+  
+  --primary: 220 60% 55%;
+  --primary-foreground: 210 54% 98%;
+  
+  --secondary: 220 25% 20%;
+  --secondary-foreground: 210 15% 90%;
+  
+  --accent: 220 60% 55%;
+  --accent-foreground: 210 54% 98%;
+  
+  --ring: 220 60% 55%;
+  
+  /* Legacy semantic colors */
+  --cream: 210 15% 90%;
+  --navy: 220 60% 55%;
+  --russet: 0 55% 55%;
+  --sage: 200 45% 50%;
+  --ink: 210 15% 90%;
+  --paper: 220 25% 18%;
 }
 
 /* Content width variables */
@@ -97,23 +341,24 @@
   
   html {
     scroll-behavior: smooth;
+    @apply spring; /* Default to spring theme */
   }
   
   body {
-    @apply bg-cream text-ink font-serif antialiased;
+    @apply bg-background text-foreground font-serif antialiased;
   }
   
   h1, h2, h3, h4, h5, h6 {
-    @apply font-serif text-navy dark:text-cream;
+    @apply font-serif text-primary dark:text-primary-foreground;
   }
   
   p {
-    @apply text-ink dark:text-cream/90;
+    @apply text-foreground dark:text-foreground/90;
   }
   
   /* Line numbers for reading view */
   .line-number {
-    @apply inline-block min-w-8 mr-2 text-right text-sage/70 dark:text-sage/60 select-none;
+    @apply inline-block min-w-8 mr-2 text-right text-muted-foreground/70 dark:text-muted-foreground/60 select-none;
   }
   
   /* Text lines in reading view */
@@ -122,7 +367,7 @@
   }
   
   .text-line:hover {
-    @apply bg-navy/5 dark:bg-cream/5;
+    @apply bg-primary/5 dark:bg-primary-foreground/5;
   }
   
   /* Custom scrollbar */
@@ -131,15 +376,15 @@
   }
   
   ::-webkit-scrollbar-track {
-    @apply bg-paper/50 dark:bg-[#1e1e1e]/50;
+    @apply bg-muted/50 dark:bg-muted/50;
   }
   
   ::-webkit-scrollbar-thumb {
-    @apply bg-sage rounded-full;
+    @apply bg-accent/80 rounded-full;
   }
   
   .dark ::-webkit-scrollbar-thumb {
-    @apply bg-sage/70;
+    @apply bg-accent/70;
   }
   
   /* Font size utilities for reading view */
diff --git a/client/src/main.tsx b/client/src/main.tsx
index fb3bfaf..143f7da 100644
--- a/client/src/main.tsx
+++ b/client/src/main.tsx
@@ -2,9 +2,12 @@ import { createRoot } from "react-dom/client";
 import App from "./App";
 import "./index.css";
 import { ThemeProvider } from "@/components/ui/theme-provider";
+import { SeasonProvider } from "@/hooks/use-season";
 
 createRoot(document.getElementById("root")!).render(
   <ThemeProvider defaultTheme="system">
-    <App />
+    <SeasonProvider>
+      <App />
+    </SeasonProvider>
   </ThemeProvider>
 );