Add light/dark mode with toggle, fix all theme-aware text colors

app/components/MapView.tsx

@@ -1,6 +1,6 @@
 "use client"
 
-import { useEffect, useRef } from "react"
+import { useEffect } from "react"
 import { MapContainer, TileLayer, Marker, Popup, useMap } from "react-leaflet"
 import L from "leaflet"
 import "leaflet/dist/leaflet.css"
@@ -14,7 +14,7 @@ function createAmberIcon(isSelected: boolean) {
     <svg width="${size}" height="${size}" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
       <circle cx="16" cy="14" r="10" fill="${isSelected ? "#f59e0b" : "#d97706"}" stroke="${isSelected ? "#fff" : "#f59e0b"}" stroke-width="2"/>
       <path d="M16 28 L10 20 Q16 22 22 20 Z" fill="${isSelected ? "#f59e0b" : "#d97706"}"/>
-      <circle cx="16" cy="14" r="4" fill="${isSelected ? "#000" : "#0d0d0d"}"/>
+      <circle cx="16" cy="14" r="4" fill="${isSelected ? "#000" : "#333"}"/>
     </svg>
   `
   return L.divIcon({
@@ -53,24 +53,30 @@ interface Props {
   restaurants: Restaurant[]
   selectedId: string | null
   onSelect: (id: string | null) => void
+  theme?: "light" | "dark"
 }
 
-export default function MapView({ restaurants, selectedId, onSelect }: Props) {
+export default function MapView({ restaurants, selectedId, onSelect, theme = "dark" }: Props) {
   const center: [number, number] =
     restaurants.length > 0
       ? [restaurants[0].lat, restaurants[0].lng]
       : [51.5, 10]
 
+  const tileUrl = theme === "dark"
+    ? "https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png"
+    : "https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png"
+
   return (
     <MapContainer
       center={center}
       zoom={5}
-      style={{ height: "100%", width: "100%", background: "#0d0d0d" }}
+      style={{ height: "100%", width: "100%", background: theme === "dark" ? "#0d0d0d" : "#f0f0f0" }}
       zoomControl={false}
     >
       <TileLayer
+        key={tileUrl}
         attribution='&copy; <a href="https://carto.com/">CARTO</a>'
-        url="https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png"
+        url={tileUrl}
         subdomains="abcd"
         maxZoom={20}
       />
@@ -88,8 +94,8 @@ export default function MapView({ restaurants, selectedId, onSelect }: Props) {
         >
           <Popup>
             <div className="min-w-[180px]">
-              <p className="font-bold text-[#f5f5f5] text-base leading-tight">{r.name}</p>
-              <p className="text-white/50 text-xs mt-1">
+              <p className="font-bold text-base leading-tight">{r.name}</p>
+              <p className="text-xs mt-1 opacity-50">
                 {r.city}, {r.country}
               </p>
               <div className="flex flex-wrap gap-1 mt-2">
@@ -106,7 +112,7 @@ export default function MapView({ restaurants, selectedId, onSelect }: Props) {
                 <span className="text-[#f59e0b] font-black text-lg">
                   {avgRating(r).toFixed(1)}
                 </span>
-                <span className="text-white/40 text-xs">
+                <span className="text-xs opacity-40">
                   {r.visits.length} {r.visits.length === 1 ? "visit" : "visits"}
                 </span>
               </div>

app/components/Nav.tsx

@@ -3,20 +3,46 @@
 import Link from "next/link"
 import { usePathname } from "next/navigation"
 import { motion } from "framer-motion"
+import { useTheme } from "@/app/components/ThemeProvider"
 
 const navItems = [
   { href: "/", label: "Home", icon: "◈" },
   { href: "/map", label: "Map", icon: "◉" },
 ]
 
+function SunIcon() {
+  return (
+    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+      <circle cx="12" cy="12" r="5"/>
+      <line x1="12" y1="1" x2="12" y2="3"/>
+      <line x1="12" y1="21" x2="12" y2="23"/>
+      <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/>
+      <line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/>
+      <line x1="1" y1="12" x2="3" y2="12"/>
+      <line x1="21" y1="12" x2="23" y2="12"/>
+      <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/>
+      <line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/>
+    </svg>
+  )
+}
+
+function MoonIcon() {
+  return (
+    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+      <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/>
+    </svg>
+  )
+}
+
 export default function Nav() {
   const pathname = usePathname()
+  const { theme, toggle } = useTheme()
 
   return (
     <>
       {/* Desktop top nav */}
-      <nav className="hidden md:flex items-center justify-between px-8 py-5 border-b border-white/5 sticky top-0 z-50 bg-[#0d0d0d]/80 backdrop-blur-xl">
-        <Link href="/" className="text-2xl font-black tracking-tighter text-[#f5f5f5] hover:text-[#f59e0b] transition-colors">
+      <nav className="hidden md:flex items-center justify-between px-8 py-5 border-b border-black/[0.06] dark:border-white/[0.05] sticky top-0 z-50 bg-[#fafafa]/80 dark:bg-[#0d0d0d]/80 backdrop-blur-xl">
+        <Link href="/" className="text-2xl font-black tracking-tighter text-[#111] dark:text-[#f5f5f5] hover:text-[#f59e0b] dark:hover:text-[#f59e0b] transition-colors">
           food.
         </Link>
         <div className="flex items-center gap-8">
@@ -25,17 +51,26 @@ export default function Nav() {
               key={item.href}
               href={item.href}
               className={`text-sm font-medium transition-colors hover:text-[#f59e0b] ${
-                pathname === item.href ? "text-[#f59e0b]" : "text-white/60"
+                pathname === item.href
+                  ? "text-[#f59e0b]"
+                  : "text-black/50 dark:text-white/60"
               }`}
             >
               {item.label}
             </Link>
           ))}
+          <button
+            onClick={toggle}
+            aria-label="Toggle theme"
+            className="text-black/40 dark:text-white/40 hover:text-[#f59e0b] dark:hover:text-[#f59e0b] transition-colors p-1"
+          >
+            {theme === "dark" ? <SunIcon /> : <MoonIcon />}
+          </button>
         </div>
       </nav>
 
       {/* Mobile bottom nav */}
-      <nav className="md:hidden fixed bottom-0 left-0 right-0 z-50 border-t border-white/5 bg-[#0d0d0d]/90 backdrop-blur-xl">
+      <nav className="md:hidden fixed bottom-0 left-0 right-0 z-50 border-t border-black/[0.06] dark:border-white/[0.05] bg-[#fafafa]/90 dark:bg-[#0d0d0d]/90 backdrop-blur-xl">
         <div className="flex items-center justify-around py-3">
           {navItems.map((item) => {
             const isActive = pathname === item.href
@@ -48,14 +83,14 @@ export default function Nav() {
                 <motion.div
                   whileTap={{ scale: 0.85 }}
                   className={`text-xl transition-colors ${
-                    isActive ? "text-[#f59e0b]" : "text-white/40"
+                    isActive ? "text-[#f59e0b]" : "text-black/30 dark:text-white/40"
                   }`}
                 >
                   {item.icon}
                 </motion.div>
                 <span
                   className={`text-[10px] font-medium tracking-wider uppercase transition-colors ${
-                    isActive ? "text-[#f59e0b]" : "text-white/30"
+                    isActive ? "text-[#f59e0b]" : "text-black/25 dark:text-white/30"
                   }`}
                 >
                   {item.label}
@@ -63,6 +98,22 @@ export default function Nav() {
               </Link>
             )
           })}
+          {/* Theme toggle in mobile nav */}
+          <button
+            onClick={toggle}
+            aria-label="Toggle theme"
+            className="flex flex-col items-center gap-1 px-6 py-1"
+          >
+            <motion.div
+              whileTap={{ scale: 0.85 }}
+              className="text-xl text-black/30 dark:text-white/40 hover:text-[#f59e0b] transition-colors"
+            >
+              {theme === "dark" ? <SunIcon /> : <MoonIcon />}
+            </motion.div>
+            <span className="text-[10px] font-medium tracking-wider uppercase text-black/25 dark:text-white/30">
+              {theme === "dark" ? "Light" : "Dark"}
+            </span>
+          </button>
         </div>
       </nav>
     </>

app/components/RestaurantCard.tsx

@@ -30,18 +30,19 @@ export default function RestaurantCard({ restaurant, latestVisit, index }: Props
       transition={{ duration: 0.4, delay: index * 0.08, ease: [0.25, 0.1, 0.25, 1] }}
     >
       <Link href={`/restaurant/${restaurant.id}`}>
-        <div className="group relative rounded-2xl border border-white/[0.06] bg-white/[0.03] hover:bg-white/[0.06] hover:border-white/[0.12] transition-all duration-300 p-5 cursor-pointer overflow-hidden">
+        <div className="group relative rounded-2xl border border-black/[0.07] dark:border-white/[0.06] bg-white dark:bg-white/[0.03] hover:bg-stone-50 dark:hover:bg-white/[0.06] hover:border-black/[0.12] dark:hover:border-white/[0.12] transition-all duration-300 p-5 cursor-pointer overflow-hidden shadow-sm dark:shadow-none">
           {/* Amber glow on hover */}
-          <div className="absolute inset-0 rounded-2xl opacity-0 group-hover:opacity-100 transition-opacity duration-500 pointer-events-none"
+          <div
+            className="absolute inset-0 rounded-2xl opacity-0 group-hover:opacity-100 transition-opacity duration-500 pointer-events-none"
             style={{ background: "radial-gradient(circle at 50% 0%, rgba(245,158,11,0.06) 0%, transparent 70%)" }}
           />
 
           <div className="flex items-start justify-between gap-4">
             <div className="flex-1 min-w-0">
-              <h3 className="text-lg font-bold text-[#f5f5f5] group-hover:text-[#f59e0b] transition-colors truncate">
+              <h3 className="text-lg font-bold text-[#111] dark:text-[#f5f5f5] group-hover:text-[#f59e0b] transition-colors truncate">
                 {restaurant.name}
               </h3>
-              <p className="text-sm text-white/40 mt-0.5">
+              <p className="text-sm text-black/40 dark:text-white/40 mt-0.5">
                 {restaurant.city}, {restaurant.country}
               </p>
             </div>
@@ -51,9 +52,9 @@ export default function RestaurantCard({ restaurant, latestVisit, index }: Props
                 <span className="text-[#f59e0b] font-black text-lg leading-none">
                   {latestVisit.rating}
                 </span>
-                <span className="text-white/30 text-xs">/10</span>
+                <span className="text-black/25 dark:text-white/30 text-xs">/10</span>
               </div>
-              <span className="text-white/30 text-xs font-medium tracking-wide">
+              <span className="text-black/30 dark:text-white/30 text-xs font-medium tracking-wide">
                 {priceLabel(restaurant.price_range)}
               </span>
             </div>
@@ -61,7 +62,7 @@ export default function RestaurantCard({ restaurant, latestVisit, index }: Props
 
           <div className="mt-4">
             {latestVisit.dishes[0] && (
-              <p className="text-sm text-white/60 italic truncate">
+              <p className="text-sm text-black/50 dark:text-white/60 italic truncate">
                 &ldquo;{latestVisit.dishes[0]}&rdquo;
               </p>
             )}
@@ -72,20 +73,20 @@ export default function RestaurantCard({ restaurant, latestVisit, index }: Props
               {restaurant.cuisine.slice(0, 3).map((tag) => (
                 <span
                   key={tag}
-                  className="text-[10px] font-semibold uppercase tracking-wider text-[#f59e0b]/70 bg-[#f59e0b]/10 rounded-full px-2.5 py-0.5"
+                  className="text-[10px] font-semibold uppercase tracking-wider text-[#f59e0b] bg-[#f59e0b]/10 rounded-full px-2.5 py-0.5"
                 >
                   {tag}
                 </span>
               ))}
             </div>
-            <span className="text-xs text-white/25 shrink-0">
+            <span className="text-xs text-black/25 dark:text-white/25 shrink-0">
               {formatDate(latestVisit.date)}
             </span>
           </div>
 
           {restaurant.visits.length > 1 && (
-            <div className="mt-3 pt-3 border-t border-white/[0.05]">
-              <p className="text-xs text-white/30">
+            <div className="mt-3 pt-3 border-t border-black/[0.05] dark:border-white/[0.05]">
+              <p className="text-xs text-black/30 dark:text-white/30">
                 {restaurant.visits.length} visits
               </p>
             </div>

app/components/ThemeProvider.tsx

@@ -0,0 +1,55 @@
+"use client"
+
+import { createContext, useContext, useEffect, useState } from "react"
+
+type Theme = "light" | "dark"
+
+interface ThemeContextValue {
+  theme: Theme
+  toggle: () => void
+}
+
+const ThemeContext = createContext<ThemeContextValue>({
+  theme: "dark",
+  toggle: () => {},
+})
+
+export function useTheme() {
+  return useContext(ThemeContext)
+}
+
+export default function ThemeProvider({ children }: { children: React.ReactNode }) {
+  const [theme, setTheme] = useState<Theme>("dark")
+  const [mounted, setMounted] = useState(false)
+
+  useEffect(() => {
+    // Read from localStorage, fall back to system preference
+    const stored = localStorage.getItem("food-theme") as Theme | null
+    if (stored === "light" || stored === "dark") {
+      setTheme(stored)
+    } else {
+      const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches
+      setTheme(prefersDark ? "dark" : "light")
+    }
+    setMounted(true)
+  }, [])
+
+  useEffect(() => {
+    if (!mounted) return
+    const root = document.documentElement
+    if (theme === "dark") {
+      root.classList.add("dark")
+    } else {
+      root.classList.remove("dark")
+    }
+    localStorage.setItem("food-theme", theme)
+  }, [theme, mounted])
+
+  const toggle = () => setTheme((t) => (t === "dark" ? "light" : "dark"))
+
+  return (
+    <ThemeContext.Provider value={{ theme, toggle }}>
+      {children}
+    </ThemeContext.Provider>
+  )
+}