Fix: Reduce logo spacing and make it clickable

Reduced the space between the logo and "RefSpring" text in the header and landing page. Made the logo clickable, linking it to the homepage.

Author: lovable-dev[bot]

src/pages/LandingPage.tsx

@@ -1,4 +1,3 @@
-
 import { Button } from "@/components/ui/button";
 import { ArrowRight, Zap, Users, BarChart3, Shield, CheckCircle, Star, TrendingUp, DollarSign, Clock, Globe, Award } from "lucide-react";
 import { useEffect, useState } from "react";
@@ -121,10 +120,10 @@ const LandingPage = () => {
         <header className="fixed top-0 w-full border-b border-slate-200/80 bg-white/90 backdrop-blur-xl z-50 transition-all">
           <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
             <div className="flex justify-between items-center h-16">
-              <div className="flex items-center gap-3 animate-fade-in">
+              <a href="/" className="flex items-center gap-2 animate-fade-in hover:opacity-80 transition-opacity">
                 <RefSpringLogo width="32" height="32" />
                 <div className="font-bold text-2xl text-slate-900">RefSpring</div>
-              </div>
+              </a>
               <nav className="hidden md:flex space-x-8" role="navigation" aria-label="Navigation principale">
                 <a href="#features" className="text-slate-600 hover:text-slate-900 font-medium transition-all hover:scale-105">
                   Fonctionnalités