2026-03-31 11:53:47 +00:00
9 changed files with 103 additions and 13 deletions
@@ -7,6 +7,15 @@
    <title>SPARC Dashboard</title>
  </head>
  <body>
+    <script>
+      // Prevent FOUC: apply saved theme before first render
+      (function() {
+        var theme = localStorage.getItem('theme');
+        if (theme === 'dark' || (!theme && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
+          document.documentElement.classList.add('dark');
+        }
+      })();
+    </script>
    <div id="root"></div>
    <script type="module" src="/src/main.tsx"></script>
  </body>
@@ -1,6 +1,7 @@
 import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { AuthProvider } from './context/AuthContext';
+import { ThemeProvider } from './context/ThemeContext';
 import { Layout } from './components/Layout';
 import { ProtectedRoute } from './components/ProtectedRoute';
 import { Login } from './pages/Login';
@@ -22,6 +23,7 @@ const queryClient = new QueryClient({

 function App() {
  return (
+    <ThemeProvider>
    <QueryClientProvider client={queryClient}>
      <AuthProvider>
        <BrowserRouter>
@@ -61,6 +63,7 @@ function App() {
        </BrowserRouter>
      </AuthProvider>
    </QueryClientProvider>
+    </ThemeProvider>
  );
 }

@@ -1,9 +1,11 @@
 import { Outlet, NavLink, useNavigate } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
-import { Search, Layers, BarChart3, Info, Users, LogOut } from 'lucide-react';
+import { useTheme } from '../context/ThemeContext';
+import { Search, Layers, BarChart3, Info, Users, LogOut, Sun, Moon } from 'lucide-react';

 export function Layout() {
  const { user, isAdmin, logout } = useAuth();
+  const { theme, toggleTheme } = useTheme();
  const navigate = useNavigate();

  const handleLogout = () => {
@@ -23,7 +25,7 @@ export function Layout() {
  }

  return (
-    <div className="min-h-screen bg-gradient-to-br from-bg-dark to-indigo-950">
+    <div className="min-h-screen bg-gradient-to-br from-bg-dark to-slate-100 dark:to-indigo-950">
      {/* Header */}
      <header className="bg-bg-card/80 backdrop-blur-lg border-b border-primary/20">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
@@ -63,6 +65,13 @@ export function Layout() {

            {/* User menu */}
            <div className="flex items-center gap-4">
+              <button
+                onClick={toggleTheme}
+                className="p-2 rounded-lg text-text-secondary hover:text-text-primary hover:bg-bg-card-hover transition-all"
+                aria-label={theme === 'dark' ? 'Switch to light mode' : 'Switch to dark mode'}
+              >
+                {theme === 'dark' ? <Sun size={18} /> : <Moon size={18} />}
+              </button>
              <div className="text-right hidden sm:block">
                <div className="text-sm font-medium text-text-primary">{user?.email}</div>
                <div className="text-xs text-text-secondary capitalize">{user?.role}</div>
@@ -12,7 +12,7 @@ export function ProtectedRoute({ children, requireAdmin = false }: ProtectedRout

  if (isLoading) {
    return (
-      <div className="min-h-screen bg-gradient-to-br from-bg-dark to-indigo-950 flex items-center justify-center">
+      <div className="min-h-screen bg-gradient-to-br from-bg-dark to-slate-100 dark:to-indigo-950 flex items-center justify-center">
        <div className="animate-spin rounded-full h-12 w-12 border-t-2 border-b-2 border-primary"></div>
      </div>
    );
@@ -0,0 +1,48 @@
+import { createContext, useContext, useEffect, useState } from 'react';
+
+type Theme = 'light' | 'dark';
+
+interface ThemeContextType {
+  theme: Theme;
+  toggleTheme: () => void;
+}
+
+const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
+
+function getInitialTheme(): Theme {
+  const stored = localStorage.getItem('theme');
+  if (stored === 'light' || stored === 'dark') return stored;
+  return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
+}
+
+export function ThemeProvider({ children }: { children: React.ReactNode }) {
+  const [theme, setTheme] = useState<Theme>(getInitialTheme);
+
+  useEffect(() => {
+    const root = document.documentElement;
+    if (theme === 'dark') {
+      root.classList.add('dark');
+    } else {
+      root.classList.remove('dark');
+    }
+    localStorage.setItem('theme', theme);
+  }, [theme]);
+
+  const toggleTheme = () => {
+    setTheme((prev) => (prev === 'dark' ? 'light' : 'dark'));
+  };
+
+  return (
+    <ThemeContext.Provider value={{ theme, toggleTheme }}>
+      {children}
+    </ThemeContext.Provider>
+  );
+}
+
+export function useTheme() {
+  const context = useContext(ThemeContext);
+  if (!context) {
+    throw new Error('useTheme must be used within a ThemeProvider');
+  }
+  return context;
+}
@@ -2,6 +2,26 @@
@tailwind components;
@tailwind utilities;

+/* Light mode (default) */
+:root {
+  --color-bg-dark: #f1f5f9;
+  --color-bg-card: #ffffff;
+  --color-bg-card-hover: #e2e8f0;
+  --color-text-primary: #0f172a;
+  --color-text-secondary: #475569;
+  --color-border: #cbd5e1;
+}
+
+/* Dark mode */
+.dark {
+  --color-bg-dark: #0f172a;
+  --color-bg-card: #1e293b;
+  --color-bg-card-hover: #334155;
+  --color-text-primary: #f8fafc;
+  --color-text-secondary: #94a3b8;
+  --color-border: #334155;
+}
+
 body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
@@ -15,7 +35,7 @@ body {
 }

 ::-webkit-scrollbar-track {
-  background: #1e293b;
+  background: var(--color-bg-card);
 }

 ::-webkit-scrollbar-thumb {
@@ -30,5 +50,5 @@ body {
 /* Selection */
 ::selection {
  background: rgba(99, 102, 241, 0.3);
-  color: #f8fafc;
+  color: var(--color-text-primary);
 }
@@ -31,7 +31,7 @@ export function Login() {
  };

  return (
-    <div className="min-h-screen bg-gradient-to-br from-bg-dark to-indigo-950 flex items-center justify-center px-4">
+    <div className="min-h-screen bg-gradient-to-br from-bg-dark to-slate-100 dark:to-indigo-950 flex items-center justify-center px-4">
      <div className="w-full max-w-md">
        {/* Brand */}
        <div className="text-center mb-8">
@@ -40,7 +40,7 @@ export function Register() {
  };

  return (
-    <div className="min-h-screen bg-gradient-to-br from-bg-dark to-indigo-950 flex items-center justify-center px-4">
+    <div className="min-h-screen bg-gradient-to-br from-bg-dark to-slate-100 dark:to-indigo-950 flex items-center justify-center px-4">
      <div className="w-full max-w-md">
        {/* Brand */}
        <div className="text-center mb-8">
@@ -4,6 +4,7 @@ export default {
    "./index.html",
    "./src/**/*.{js,ts,jsx,tsx}",
  ],
+  darkMode: 'class',
  theme: {
    extend: {
      colors: {
@@ -16,15 +17,15 @@ export default {
        warning: '#f59e0b',
        error: '#ef4444',
        bg: {
-          dark: '#0f172a',
-          card: '#1e293b',
-          'card-hover': '#334155',
+          dark: 'var(--color-bg-dark)',
+          card: 'var(--color-bg-card)',
+          'card-hover': 'var(--color-bg-card-hover)',
        },
        text: {
-          primary: '#f8fafc',
-          secondary: '#94a3b8',
+          primary: 'var(--color-text-primary)',
+          secondary: 'var(--color-text-secondary)',
        },
-        border: '#334155',
+        border: 'var(--color-border)',
      },
    },
  },