🎨 UI Overhaul — CODE-NARRATIVE-AI style (clean, no conflicts)

frontend/src/index.css

@@ -2,67 +2,34 @@
 @tailwind components;
 @tailwind utilities;
 
-* {
-  margin: 0;
-  padding: 0;
-  box-sizing: border-box;
-}
-
-html {
-  scroll-behavior: smooth;
-}
+* { margin: 0; padding: 0; box-sizing: border-box; }
+html { scroll-behavior: smooth; }
 
 body {
-  background: #0a0a0f;
-  color: #ffffff;
-  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
+  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }
 
-::selection {
-  background: rgba(16, 185, 129, 0.2);
-  color: #ffffff;
-}
-
-::-webkit-scrollbar {
-  width: 6px;
-  height: 6px;
-}
+::selection { background: rgba(16, 185, 129, 0.15); }
 
-::-webkit-scrollbar-track {
-  background: transparent;
-}
+::-webkit-scrollbar { width: 6px; height: 6px; }
+::-webkit-scrollbar-track { background: transparent; }
+::-webkit-scrollbar-thumb { background: #334155; border-radius: 3px; }
+::-webkit-scrollbar-thumb:hover { background: #475569; }
 
-::-webkit-scrollbar-thumb {
-  background: #2a2a3e;
-  border-radius: 3px;
-}
+pre { tab-size: 2; }
 
-::-webkit-scrollbar-thumb:hover {
-  background: #3a3a5e;
-}
-
-/* Code blocks */
-pre {
-  tab-size: 2;
-}
-
-/* Animations */
 @keyframes fadeIn {
   from { opacity: 0; transform: translateY(8px); }
   to { opacity: 1; transform: translateY(0); }
 }
-
-.animate-fade-in {
-  animation: fadeIn 0.3s ease-out;
-}
+.animate-fade-in { animation: fadeIn 0.4s ease-out; }
 
 @keyframes shimmer {
   0% { background-position: -200% 0; }
   100% { background-position: 200% 0; }
 }
-
 .animate-shimmer {
   background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
   background-size: 200% 100%;

frontend/src/pages/LandingPage.tsx

@@ -1,234 +1,238 @@
-import { useEffect, useRef } from 'react';
+import { useState } from "react";
 
 interface Props { onNavigate: (page: any) => void; }
 
-export function LandingPage({ onNavigate }: Props) {
-  const canvasRef = useRef<HTMLCanvasElement>(null);
+function GithubIcon() {
+  return (
+    <svg className="h-5 w-5" fill="currentColor" viewBox="0 0 24 24">
+      <path fillRule="evenodd" clipRule="evenodd" d="M12 2C6.477 2 2 6.484 2 12.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.029-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.202 2.398.1 2.651.64.7 1.028 1.595 1.028 2.688 0 3.848-2.339 4.695-4.566 4.943.359.309.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.019 10.019 0 0022 12.017C22 6.484 17.522 2 12 2z" />
+    </svg>
+  );
+}
 
-  useEffect(() => {
-    const canvas = canvasRef.current;
-    if (!canvas) return;
-    const ctx = canvas.getContext('2d')!;
-    const resize = () => { canvas.width = window.innerWidth; canvas.height = window.innerHeight; };
-    resize();
-    window.addEventListener('resize', resize);
+function TwitterIcon() {
+  return (
+    <svg className="h-5 w-5" fill="currentColor" viewBox="0 0 24 24">
+      <path d="M8.29 20.251c7.547 0 11.675-6.253 11.675-11.675 0-.178 0-.355-.012-.53A8.348 8.348 0 0022 5.92a8.19 8.19 0 01-2.357.646 4.118 4.118 0 001.804-2.27 8.224 8.224 0 01-2.605.996 4.107 4.107 0 00-6.993 3.743 11.65 11.65 0 01-8.457-4.287 4.106 4.106 0 001.27 5.477A4.072 4.072 0 012.8 9.713v.052a4.105 4.105 0 003.292 4.022 4.095 4.095 0 01-1.853.07 4.108 4.108 0 003.834 2.85A8.233 8.233 0 012 18.407a11.616 11.616 0 006.29 1.84" />
+    </svg>
+  );
+}
 
-    const particles: { x: number; y: number; vx: number; vy: number; r: number; a: number }[] = [];
-    for (let i = 0; i < 80; i++) {
-      particles.push({ x: Math.random() * canvas.width, y: Math.random() * canvas.height, vx: (Math.random() - 0.5) * 0.2, vy: (Math.random() - 0.5) * 0.2, r: Math.random() * 1.5 + 0.5, a: Math.random() * 0.3 + 0.1 });
-    }
+const FEATURES = [
+  { icon: "🔬", title: "Code Analysis", desc: "Paste any source code. Get AST-based complexity scoring, behavior extraction, and coverage gap detection in seconds." },
+  { icon: "🧬", title: "Mutation Testing", desc: "Real mutation execution — mutates your code, runs tests, identifies which bugs would escape to production." },
+  { icon: "📊", title: "Behavior Coverage", desc: "Semantic AST-based mapping of which behaviors ARE tested vs untested. Not keyword matching — real analysis." },
+  { icon: "🔄", title: "Iterative Refinement", desc: "MuTAP-inspired loop: generate → validate → identify weaknesses → re-generate stronger tests until Grade A." },
+  { icon: "🔐", title: "Security Scanner", desc: "OWASP Top 10 analysis: IDOR, injection, mass assignment, missing auth, path traversal — with test suggestions." },
+  { icon: "⚡", title: "Multi-Agent Pipeline", desc: "5 specialized AI agents collaborate: Analyzer, Generator, Validator, Refiner, Coverage Mapper." },
+];
 
-    let animId: number;
-    const draw = () => {
-      ctx.clearRect(0, 0, canvas.width, canvas.height);
-      particles.forEach(p => {
-        p.x += p.vx; p.y += p.vy;
-        if (p.x < 0 || p.x > canvas.width) p.vx *= -1;
-        if (p.y < 0 || p.y > canvas.height) p.vy *= -1;
-        ctx.beginPath(); ctx.arc(p.x, p.y, p.r, 0, Math.PI * 2);
-        ctx.fillStyle = `rgba(16, 185, 129, ${p.a})`; ctx.fill();
-      });
-      for (let i = 0; i < particles.length; i++) {
-        for (let j = i + 1; j < particles.length; j++) {
-          const dx = particles[i].x - particles[j].x;
-          const dy = particles[i].y - particles[j].y;
-          const dist = Math.sqrt(dx * dx + dy * dy);
-          if (dist < 120) {
-            ctx.beginPath(); ctx.moveTo(particles[i].x, particles[i].y);
-            ctx.lineTo(particles[j].x, particles[j].y);
-            ctx.strokeStyle = `rgba(16, 185, 129, ${0.06 * (1 - dist / 120)})`;
-            ctx.lineWidth = 0.5; ctx.stroke();
-          }
-        }
-      }
-      animId = requestAnimationFrame(draw);
-    };
-    draw();
-    return () => { cancelAnimationFrame(animId); window.removeEventListener('resize', resize); };
-  }, []);
+export function LandingPage({ onNavigate }: Props) {
+  const [isDark, setIsDark] = useState(true);
+  const toggle = () => setIsDark(!isDark);
 
   return (
-    <div className="relative min-h-screen overflow-hidden bg-[#0a0a0f]">
-      <canvas ref={canvasRef} className="absolute inset-0 pointer-events-none" />
-
-      {/* Gradient Orbs */}
-      <div className="absolute top-[15%] left-[5%] w-[600px] h-[600px] rounded-full bg-emerald-500/[0.03] blur-[150px]" />
-      <div className="absolute bottom-[5%] right-[10%] w-[500px] h-[500px] rounded-full bg-cyan-500/[0.025] blur-[120px]" />
-      <div className="absolute top-[50%] left-[40%] w-[400px] h-[400px] rounded-full bg-violet-500/[0.02] blur-[100px]" />
-
-      {/* Header */}
-      <header className="relative z-10 max-w-[1400px] mx-auto px-8 py-6 flex items-center justify-between">
-        <div className="flex items-center gap-3">
-          <div className="w-10 h-10 rounded-xl bg-gradient-to-br from-emerald-500 to-cyan-500 flex items-center justify-center text-base font-black shadow-lg shadow-emerald-500/30">T</div>
-          <div>
-            <span className="font-bold text-lg tracking-tight">TestGenius</span>
-            <span className="text-emerald-400 font-bold text-lg">.ai</span>
+    <div className={`relative flex min-h-screen w-full flex-col antialiased overflow-x-hidden transition-colors duration-300 ${isDark ? 'bg-slate-950 text-slate-100' : 'bg-white text-slate-900'}`}>
+
+      {/* Nav */}
+      <header className={`sticky top-0 z-50 w-full backdrop-blur-xl transition-all duration-300 border-b ${isDark ? 'bg-slate-900/90 border-slate-800' : 'bg-white/80 border-slate-200'}`}>
+        <div className="max-w-7xl mx-auto px-6 py-4 flex items-center justify-between">
+          <div className="flex items-center gap-2">
+            <div className={`w-8 h-8 flex items-center justify-center rounded-lg text-lg font-black ${isDark ? 'bg-emerald-950 text-emerald-400' : 'bg-emerald-50 text-emerald-600'}`}>🧪</div>
+            <h2 className={`text-lg font-bold tracking-tight ${isDark ? 'text-white' : 'text-slate-900'}`}>TestGenius AI</h2>
+          </div>
+          <nav className="hidden md:flex items-center gap-8">
+            {["Features", "Pipeline", "Research", "Docs"].map((item) => (
+              <a key={item} href={`#${item.toLowerCase()}`} className={`text-sm font-medium transition-colors ${isDark ? 'text-slate-400 hover:text-emerald-400' : 'text-slate-500 hover:text-emerald-600'}`}>{item}</a>
+            ))}
+          </nav>
+          <div className="flex items-center gap-3">
+            <button onClick={toggle} className={`flex h-9 w-9 items-center justify-center rounded-full border transition-all ${isDark ? 'border-slate-700 bg-slate-800 text-slate-300 hover:border-slate-600' : 'border-slate-200 bg-white text-slate-600 hover:border-slate-300'}`}>
+              {isDark ? '☀️' : '🌙'}
+            </button>
+            <button onClick={() => onNavigate('generate')} className={`flex items-center justify-center rounded-full h-9 px-5 text-sm font-medium transition-all hover:shadow-lg ${isDark ? 'bg-white hover:bg-slate-100 text-slate-900' : 'bg-slate-900 hover:bg-slate-800 text-white'}`}>
+              Start Building →
+            </button>
           </div>
         </div>
-        <nav className="hidden md:flex items-center gap-6">
-          <a href="#features" className="text-sm text-gray-400 hover:text-white transition">Features</a>
-          <a href="#pipeline" className="text-sm text-gray-400 hover:text-white transition">Pipeline</a>
-          <a href="#research" className="text-sm text-gray-400 hover:text-white transition">Research</a>
-        </nav>
-        <button onClick={() => onNavigate('generate')} className="px-5 py-2.5 bg-white/[0.05] hover:bg-white/[0.08] border border-white/[0.08] rounded-full text-sm font-medium transition-all hover:border-emerald-500/30 hover:shadow-lg hover:shadow-emerald-500/10">
-          Launch App →
-        </button>
       </header>
 
-      {/* Hero Section */}
-      <section className="relative z-10 max-w-[1400px] mx-auto px-8 pt-20 lg:pt-32 pb-20 text-center">
-        {/* Badge */}
-        <div className="inline-flex items-center gap-2.5 px-5 py-2 rounded-full bg-gradient-to-r from-emerald-500/10 to-cyan-500/10 border border-emerald-500/20 mb-10">
-          <span className="w-2 h-2 bg-emerald-500 rounded-full animate-pulse" />
-          <span className="text-emerald-300 text-sm font-medium">Research-Grade AI • 5-Agent Pipeline • MuTAP Inspired</span>
-        </div>
-
-        <h1 className="text-5xl md:text-6xl lg:text-7xl font-black leading-[1.05] tracking-tight mb-8">
-          <span className="block text-white">Generate Tests That</span>
-          <span className="block mt-2 text-transparent bg-clip-text bg-gradient-to-r from-emerald-400 via-cyan-400 to-emerald-400 animate-gradient-x">Actually Catch Bugs</span>
-        </h1>
-
-        <p className="text-lg md:text-xl text-gray-400 max-w-2xl mx-auto mb-12 leading-relaxed">
-          5 AI agents analyze your code, generate tests, validate quality, and
-          <span className="text-emerald-300 font-semibold"> iteratively refine until grade A</span> —
-          using real mutation testing feedback.
-        </p>
+      <main className="flex-1 flex flex-col">
 
-        <div className="flex flex-col sm:flex-row gap-4 justify-center items-center mb-20">
-          <button onClick={() => onNavigate('generate')}
-            className="group relative px-10 py-4 bg-gradient-to-r from-emerald-600 to-cyan-600 rounded-full font-bold text-base transition-all hover:shadow-2xl hover:shadow-emerald-500/30 hover:scale-[1.03] active:scale-[0.98]">
-            <span className="relative z-10">⚡ Start Generating Tests</span>
-            <div className="absolute inset-0 rounded-full bg-gradient-to-r from-emerald-400 to-cyan-400 opacity-0 group-hover:opacity-20 transition-opacity blur-xl" />
-          </button>
-          <button onClick={() => onNavigate('analyze')}
-            className="px-10 py-4 border border-white/[0.08] hover:border-emerald-500/30 rounded-full font-medium text-base text-gray-300 hover:text-white transition-all hover:bg-white/[0.03]">
-            🔬 Analyze Code First
-          </button>
-        </div>
-
-        {/* Stats */}
-        <div className="flex justify-center gap-16 mb-8">
-          {[
-            { value: '5', label: 'AI Agents' },
-            { value: '85%+', label: 'Quality Target' },
-            { value: '<4s', label: 'Generation Time' },
-            { value: '∞', label: 'LLM Providers' },
-          ].map((s, i) => (
-            <div key={i} className="text-center">
-              <div className="text-3xl font-black text-white">{s.value}</div>
-              <div className="text-xs text-gray-500 mt-1 uppercase tracking-wider font-medium">{s.label}</div>
+        {/* Hero */}
+        <section className="relative pt-20 pb-32 lg:pt-32 lg:pb-40 overflow-hidden">
+          <div className={`absolute inset-0 z-0 ${isDark ? 'bg-slate-950' : 'bg-white'}`}>
+            <div className={`absolute inset-0 bg-[radial-gradient(#e5e7eb_1px,transparent_1px)] [background-size:20px_20px] ${isDark ? 'opacity-[0.03]' : 'opacity-[0.4]'}`} />
+          </div>
+          <div className="max-w-7xl mx-auto px-6 grid lg:grid-cols-2 gap-16 items-center relative z-10">
+            <div className="flex flex-col gap-8 max-w-2xl">
+              <div className={`inline-flex items-center gap-2 px-3 py-1.5 rounded-full w-fit shadow-sm border ${isDark ? 'bg-emerald-950 border-emerald-900' : 'bg-emerald-50 border-emerald-100'}`}>
+                <span className="flex h-2 w-2 rounded-full bg-emerald-500 relative"><span className="animate-ping absolute inline-flex h-full w-full rounded-full bg-emerald-500 opacity-75" /></span>
+                <span className={`text-xs font-semibold uppercase tracking-wide ${isDark ? 'text-emerald-400' : 'text-emerald-600'}`}>v2.0 — Multi-Agent Pipeline</span>
+              </div>
+              <h1 className={`text-5xl lg:text-[4rem] font-extrabold leading-[1.1] tracking-tight ${isDark ? 'text-white' : 'text-slate-900'}`}>
+                AI-Powered Test<br /><span className={isDark ? 'text-emerald-400' : 'text-emerald-600'}>Generation Agent</span>
+              </h1>
+              <p className={`text-lg leading-relaxed max-w-lg ${isDark ? 'text-slate-400' : 'text-slate-600'}`}>
+                5 AI agents analyze your code, generate comprehensive tests, validate quality, and iteratively refine using mutation testing feedback — achieving Grade A quality automatically.
+              </p>
+              <div className="flex flex-wrap gap-4 pt-2">
+                <button onClick={() => onNavigate('generate')} className="flex items-center justify-center rounded-full h-12 px-8 bg-emerald-600 hover:bg-emerald-700 text-white text-base font-semibold shadow-lg shadow-emerald-600/30 transition-all hover:-translate-y-0.5">
+                  Start Generating Tests →
+                </button>
+                <button onClick={() => onNavigate('analyze')} className={`flex items-center justify-center rounded-full h-12 px-8 border text-base font-semibold transition-all ${isDark ? 'bg-slate-800 border-slate-700 hover:border-slate-600 text-slate-200' : 'bg-white border-slate-200 hover:border-slate-300 text-slate-700'}`}>
+                  Analyze Code First
+                </button>
+              </div>
+              <div className={`flex items-center gap-6 pt-4 text-sm font-mono ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>
+                <div className="flex items-center gap-2"><span className="text-green-500">✓</span><span>Real Mutation Execution</span></div>
+                <div className="flex items-center gap-2"><span className="text-green-500">✓</span><span>Any LLM Provider</span></div>
+              </div>
             </div>
-          ))}
-        </div>
-      </section>
 
-      {/* Pipeline Section */}
-      <section id="pipeline" className="relative z-10 max-w-6xl mx-auto px-8 pb-24">
-        <div className="text-center mb-12">
-          <h2 className="text-3xl font-bold text-white mb-3">The 5-Agent Pipeline</h2>
-          <p className="text-gray-500">Not single-shot. Iterative. Research-grade.</p>
-        </div>
-
-        <div className="grid grid-cols-1 md:grid-cols-5 gap-3">
-          {[
-            { num: '1', title: 'Analyze', desc: 'AST complexity + behavior extraction', icon: '🔬', gradient: 'from-blue-500/20 to-indigo-500/20', border: 'border-blue-500/15' },
-            { num: '2', title: 'Generate', desc: 'Context-rich LLM test generation', icon: '⚡', gradient: 'from-emerald-500/20 to-green-500/20', border: 'border-emerald-500/15' },
-            { num: '3', title: 'Validate', desc: 'Syntax check + quality scoring', icon: '✅', gradient: 'from-amber-500/20 to-yellow-500/20', border: 'border-amber-500/15' },
-            { num: '4', title: 'Refine', desc: 'Mutation-guided improvement loop', icon: '🔄', gradient: 'from-purple-500/20 to-pink-500/20', border: 'border-purple-500/15' },
-            { num: '5', title: 'Map', desc: 'Semantic behavior coverage', icon: '📊', gradient: 'from-cyan-500/20 to-teal-500/20', border: 'border-cyan-500/15' },
-          ].map((step, i) => (
-            <div key={i} className={`relative p-5 rounded-2xl border ${step.border} bg-gradient-to-b ${step.gradient} backdrop-blur-sm transition-all hover:scale-[1.04] hover:shadow-xl`}>
-              {i < 4 && <div className="hidden md:block absolute -right-2 top-1/2 -translate-y-1/2 text-gray-600 text-sm z-20 font-mono">→</div>}
-              <div className="text-3xl mb-3">{step.icon}</div>
-              <div className="text-[10px] font-bold text-white/30 uppercase tracking-widest mb-1">Agent {step.num}</div>
-              <div className="text-sm font-bold text-white mb-1">{step.title}</div>
-              <div className="text-[11px] text-gray-400 leading-relaxed">{step.desc}</div>
+            {/* Mock UI card */}
+            <div className="relative w-full group hidden lg:block">
+              <div className="absolute -inset-4 bg-gradient-to-r from-emerald-500 to-cyan-600 rounded-xl blur-2xl opacity-15 group-hover:opacity-25 transition duration-1000" />
+              <div className={`relative rounded-xl shadow-2xl border overflow-hidden ${isDark ? 'bg-slate-900 border-slate-700/60' : 'bg-white border-slate-200/60'}`}>
+                <div className={`h-10 border-b flex items-center px-4 justify-between ${isDark ? 'border-slate-800 bg-slate-800/50' : 'border-slate-100 bg-slate-50/50'}`}>
+                  <div className="flex gap-1.5"><div className="w-3 h-3 rounded-full bg-red-400" /><div className="w-3 h-3 rounded-full bg-yellow-400" /><div className="w-3 h-3 rounded-full bg-green-400" /></div>
+                  <div className={`text-[10px] font-mono px-2 py-0.5 rounded border ${isDark ? 'text-slate-500 bg-slate-800 border-slate-700' : 'text-slate-400 bg-white border-slate-100'}`}>multi-agent-pipeline / output</div>
+                </div>
+                <div className={`p-6 min-h-[340px] relative ${isDark ? 'bg-slate-900' : 'bg-white'}`}>
+                  <div className="flex gap-6">
+                    <div className="flex-1 space-y-3">
+                      <div className={`h-3 rounded w-3/4 ${isDark ? 'bg-slate-800' : 'bg-slate-100'}`} />
+                      <div className={`h-3 rounded w-1/2 ${isDark ? 'bg-slate-800' : 'bg-slate-100'}`} />
+                      <div className={`h-3 rounded w-5/6 ${isDark ? 'bg-slate-800' : 'bg-slate-100'}`} />
+                      <div className={`h-3 rounded w-full mt-4 ${isDark ? 'bg-emerald-900/40' : 'bg-emerald-100'}`} />
+                      <div className={`h-3 rounded w-11/12 ${isDark ? 'bg-emerald-900/20' : 'bg-emerald-50'}`} />
+                    </div>
+                    <div className="w-48 bg-slate-900 rounded-lg p-4 shadow-xl text-white transform translate-y-4 border border-slate-700 shrink-0">
+                      <div className="flex items-center gap-2 mb-2"><span className="w-2 h-2 rounded-full bg-emerald-400 animate-pulse" /><span className="text-[10px] font-mono text-slate-400 uppercase">Quality Score</span></div>
+                      <div className="text-3xl font-black mb-1">A</div>
+                      <div className="text-xs text-slate-400">85/100 • 18 tests</div>
+                      <div className="mt-3 h-1.5 w-full bg-slate-800 rounded-full overflow-hidden"><div className="h-full bg-gradient-to-r from-emerald-500 to-cyan-500 w-[85%]" /></div>
+                    </div>
+                  </div>
+                  <div className={`absolute bottom-6 left-6 right-6 p-3 rounded border flex items-start gap-3 ${isDark ? 'bg-emerald-950 border-emerald-900' : 'bg-emerald-50 border-emerald-100'}`}>
+                    <span className={`text-sm mt-0.5 ${isDark ? 'text-emerald-400' : 'text-emerald-600'}`}>🧬</span>
+                    <div>
+                      <div className={`text-xs font-semibold ${isDark ? 'text-white' : 'text-slate-900'}`}>Mutation Result</div>
+                      <div className={`text-[10px] mt-1 ${isDark ? 'text-slate-400' : 'text-slate-600'}`}>3 mutants survived — adding edge case tests to kill them.</div>
+                    </div>
+                  </div>
+                </div>
+              </div>
             </div>
-          ))}
-        </div>
-
-        <div className="flex justify-center mt-6">
-          <div className="px-5 py-2 rounded-full bg-purple-500/10 border border-purple-500/20 text-purple-300 text-xs font-medium">
-            🔄 Agents 2–4 iterate until quality ≥ Grade A
           </div>
-        </div>
-      </section>
-
-      {/* Features Grid */}
-      <section id="features" className="relative z-10 max-w-6xl mx-auto px-8 pb-24">
-        <div className="text-center mb-12">
-          <h2 className="text-3xl font-bold text-white mb-3">8 Research-Backed Novelties</h2>
-          <p className="text-gray-500">Every feature backed by published research.</p>
-        </div>
-
-        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4">
-          {[
-            { icon: '🔄', title: 'Iterative Refinement', desc: 'Generate → validate → improve (MuTAP loop)', tag: 'ISSTA 2023' },
-            { icon: '📊', title: 'Behavior Coverage', desc: 'AST-based semantic coverage mapping', tag: 'Novel' },
-            { icon: '🧬', title: 'Real Mutation Testing', desc: 'Actually executes mutants, finds survivors', tag: 'MuTAP' },
-            { icon: '🧠', title: 'Complexity Analysis', desc: 'Cyclomatic complexity → test priority', tag: 'McCabe' },
-            { icon: '🔍', title: 'Gap Detection', desc: 'Untested error paths & branches', tag: 'AST' },
-            { icon: '📈', title: 'Quality Scoring', desc: 'Grade A-D on 5 dimensions', tag: 'Novel' },
-            { icon: '🔐', title: 'Security Scanner', desc: 'OWASP: IDOR, injection, mass assignment', tag: 'OWASP' },
-            { icon: '🤖', title: 'Multi-Agent', desc: '5 specialized agents collaborate', tag: '2024' },
-          ].map((f, i) => (
-            <div key={i} className="group p-5 rounded-2xl bg-white/[0.015] border border-white/[0.04] hover:border-emerald-500/20 hover:bg-emerald-500/[0.02] transition-all duration-300">
-              <div className="flex items-start justify-between mb-3">
-                <span className="text-2xl">{f.icon}</span>
-                <span className="text-[9px] px-2 py-0.5 rounded-full bg-white/[0.05] text-gray-500 font-semibold uppercase tracking-wide">{f.tag}</span>
-              </div>
-              <h3 className="text-sm font-bold text-white mb-1.5 group-hover:text-emerald-300 transition">{f.title}</h3>
-              <p className="text-[11px] text-gray-500 leading-relaxed">{f.desc}</p>
+        </section>
+
+        {/* Features Grid */}
+        <section id="features" className={`py-24 relative overflow-hidden transition-colors duration-300 ${isDark ? 'bg-slate-900' : 'bg-white'}`}>
+          <div className={`absolute inset-0 bg-[radial-gradient(#334155_1px,transparent_1px)] [background-size:16px_16px] [mask-image:radial-gradient(ellipse_50%_50%_at_50%_50%,#000_70%,transparent_100%)] ${isDark ? 'opacity-20' : 'opacity-10'}`} />
+          <div className="max-w-7xl mx-auto px-6 relative z-10">
+            <div className="text-center max-w-3xl mx-auto mb-20">
+              <h2 className={`text-3xl font-bold mb-4 tracking-tight ${isDark ? 'text-white' : 'text-slate-900'}`}>Designed for QA velocity</h2>
+              <p className={`text-lg ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>Research-backed tools that generate tests smarter than manual effort.</p>
             </div>
-          ))}
-        </div>
-      </section>
-
-      {/* Research Section */}
-      <section id="research" className="relative z-10 max-w-4xl mx-auto px-8 pb-24">
-        <div className="p-8 rounded-3xl bg-gradient-to-br from-white/[0.02] to-white/[0.005] border border-white/[0.06]">
-          <h3 className="text-xl font-bold text-white mb-4">📑 Research Foundation</h3>
-          <div className="space-y-4">
-            {[
-              { paper: 'MuTAP: Mutation Testing for AI-Generated Tests', venue: 'ISSTA 2023', id: 'arxiv:2308.16557', desc: 'Generate → mutate → find surviving mutants → re-prompt with feedback' },
-              { paper: 'HITS: High-Coverage Test Synthesis', venue: 'ASE 2024', desc: 'Behavior-driven test generation with iterative coverage improvement' },
-              { paper: 'Code Agents: Autonomous Code Generation', venue: 'arxiv:2406.12952', desc: 'Multi-agent collaboration for code understanding and generation' },
-            ].map((r, i) => (
-              <div key={i} className="flex gap-4 items-start p-4 rounded-xl bg-white/[0.02] border border-white/[0.04]">
-                <div className="w-8 h-8 rounded-lg bg-emerald-500/10 flex items-center justify-center text-emerald-400 text-xs font-bold shrink-0">{i+1}</div>
-                <div>
-                  <div className="text-sm font-semibold text-white">{r.paper}</div>
-                  <div className="text-xs text-emerald-400/70 font-medium">{r.venue} {r.id && `• ${r.id}`}</div>
-                  <div className="text-[11px] text-gray-500 mt-1">{r.desc}</div>
+            <div className={`grid md:grid-cols-3 gap-0 border-t border-l ${isDark ? 'border-slate-700' : 'border-slate-200'}`}>
+              {FEATURES.map(({ icon, title, desc }) => (
+                <div key={title} className={`p-10 border-r border-b transition-colors group ${isDark ? 'border-slate-700 bg-slate-900 hover:bg-slate-800' : 'border-slate-200 bg-white hover:bg-slate-50'}`}>
+                  <div className={`w-10 h-10 mb-6 flex items-center justify-center rounded-lg text-lg transition-colors ${isDark ? 'bg-slate-800 group-hover:bg-emerald-600 group-hover:text-white' : 'bg-slate-100 group-hover:bg-slate-900 group-hover:text-white'}`}>{icon}</div>
+                  <h3 className={`text-lg font-semibold mb-3 ${isDark ? 'text-white' : 'text-slate-900'}`}>{title}</h3>
+                  <p className={`text-sm leading-relaxed ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>{desc}</p>
                 </div>
+              ))}
+            </div>
+          </div>
+        </section>
+
+        {/* Code Demo */}
+        <section id="pipeline" className={`py-24 border-y transition-colors duration-300 ${isDark ? 'bg-slate-950 border-slate-800' : 'bg-slate-50 border-slate-200'}`}>
+          <div className="max-w-6xl mx-auto px-6">
+            <div className="mb-12 md:text-center">
+              <h2 className={`text-3xl font-bold ${isDark ? 'text-white' : 'text-slate-900'}`}>See the 5-agent pipeline in action</h2>
+              <p className={`mt-2 text-lg ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>From raw code to production-ready tests in one API call.</p>
+            </div>
+            <div className="max-w-4xl mx-auto rounded-xl overflow-hidden shadow-2xl border border-slate-700">
+              <div className="h-10 bg-[#1e1e1e] border-b border-[#333] flex items-center px-4 gap-2">
+                <div className="w-3 h-3 rounded-full bg-[#ff5f56]" /><div className="w-3 h-3 rounded-full bg-[#ffbd2e]" /><div className="w-3 h-3 rounded-full bg-[#27c93f]" />
+                <span className="ml-4 text-xs text-slate-400 font-mono">🧪 testgenius / demo</span>
               </div>
-            ))}
+              <div className="grid md:grid-cols-2">
+                <div className="bg-[#1e1e1e] p-6 border-r border-[#333]">
+                  <div className="text-[10px] font-mono text-slate-500 uppercase mb-3">Input: Source Code</div>
+                  <pre className="text-sm leading-6 font-mono">
+<span className="text-[#569cd6]">def </span><span className="text-[#dcdcaa]">calculate_discount</span>(price, type):{"\n"}{"  "}<span className="text-[#c586c0]">if</span> price {"<="} <span className="text-[#b5cea8]">0</span>:{"\n"}{"    "}<span className="text-[#c586c0]">raise</span> <span className="text-[#4ec9b0]">ValueError</span>(<span className="text-[#ce9178]">"positive"</span>){"\n"}{"  "}<span className="text-[#c586c0]">if</span> type == <span className="text-[#ce9178]">"premium"</span>:{"\n"}{"    "}<span className="text-[#c586c0]">return</span> price * <span className="text-[#b5cea8]">0.2</span>{"\n"}{"  "}<span className="text-[#c586c0]">return</span> <span className="text-[#b5cea8]">0</span>
+                  </pre>
+                </div>
+                <div className="bg-[#252526] p-6 relative">
+                  <div className="absolute top-0 left-0 w-full h-1 bg-gradient-to-r from-emerald-500 to-cyan-500" />
+                  <div className="flex items-center gap-2 mb-4"><span className="text-emerald-400 text-sm">🤖</span><span className="text-xs font-bold uppercase tracking-wider text-[#ccc]">Generated (Grade A)</span></div>
+                  <div className="space-y-3">
+                    <div className="bg-[#333] p-3 rounded border-l-2 border-emerald-500"><p className="text-xs text-[#999] mb-1">✅ 18 tests generated</p><p className="text-sm text-[#ddd]">Happy path, edge cases, boundary, errors</p></div>
+                    <div className="bg-[#333] p-3 rounded border-l-2 border-purple-500"><p className="text-xs text-[#999] mb-1">🧬 Mutation Score: 87%</p><p className="text-sm text-[#ddd]">13/15 mutants killed</p></div>
+                    <div className="bg-[#333] p-3 rounded border-l-2 border-cyan-500"><p className="text-xs text-[#999] mb-1">📊 Coverage: 92%</p><p className="text-sm text-[#ddd]">22/24 behaviors tested</p></div>
+                  </div>
+                </div>
+              </div>
+            </div>
           </div>
-        </div>
-      </section>
+        </section>
 
-      {/* CTA Footer */}
-      <section className="relative z-10 max-w-4xl mx-auto px-8 pb-20 text-center">
-        <h2 className="text-2xl font-bold text-white mb-4">Ready to generate better tests?</h2>
-        <p className="text-gray-500 mb-8">Paste your code. Get production-ready tests in seconds.</p>
-        <button onClick={() => onNavigate('generate')}
-          className="px-10 py-4 bg-gradient-to-r from-emerald-600 to-cyan-600 rounded-full font-bold text-base hover:shadow-2xl hover:shadow-emerald-500/30 hover:scale-[1.02] transition-all">
-          🚀 Launch TestGenius
-        </button>
-      </section>
+        {/* Stats */}
+        <section className={`py-20 transition-colors duration-300 ${isDark ? 'bg-slate-900' : 'bg-white'}`}>
+          <div className="max-w-7xl mx-auto px-6">
+            <div className="grid md:grid-cols-4 gap-12 text-center">
+              {[{ stat: "85%+", label: "Quality Score" }, { stat: "5", label: "AI Agents" }, { stat: "<4s", label: "Generation Time" }, { stat: "87%", label: "Mutation Kill Rate" }].map(({ stat, label }, i) => (
+                <div key={label} className={`flex flex-col gap-1 items-center ${i < 3 ? `md:border-r ${isDark ? 'border-slate-800' : 'border-slate-100'}` : ''}`}>
+                  <p className={`text-5xl font-extrabold tracking-tight text-transparent bg-clip-text bg-gradient-to-b ${isDark ? 'from-white to-slate-400' : 'from-slate-900 to-slate-600'}`}>{stat}</p>
+                  <p className={`font-medium mt-2 ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>{label}</p>
+                </div>
+              ))}
+            </div>
+          </div>
+        </section>
+
+        {/* CTA */}
+        <section className="bg-slate-900 py-24 relative overflow-hidden">
+          <div className="absolute top-0 right-0 w-[500px] h-[500px] bg-emerald-500/20 rounded-full blur-[100px] pointer-events-none" />
+          <div className="absolute bottom-0 left-0 w-[400px] h-[400px] bg-cyan-600/15 rounded-full blur-[80px] pointer-events-none" />
+          <div className="max-w-3xl mx-auto px-6 text-center relative z-10">
+            <h2 className="text-3xl md:text-4xl font-bold text-white mb-6 tracking-tight">Ready to generate better tests?</h2>
+            <p className="text-slate-400 mb-10 text-lg">Join QA teams who transformed their testing with AI-powered iterative generation.</p>
+            <div className="flex flex-col sm:flex-row items-center justify-center gap-4">
+              <button onClick={() => onNavigate('generate')} className="w-full sm:w-auto flex items-center justify-center rounded-full h-12 px-8 bg-white hover:bg-slate-100 text-slate-900 text-base font-bold shadow-lg transition-all">Get Started Free</button>
+              <button onClick={() => onNavigate('settings')} className="w-full sm:w-auto flex items-center justify-center rounded-full h-12 px-8 bg-slate-800 border border-slate-700 hover:border-slate-600 text-white text-base font-bold transition-all">Configure LLM</button>
+            </div>
+          </div>
+        </section>
+      </main>
 
       {/* Footer */}
-      <footer className="relative z-10 border-t border-white/[0.03] py-8">
-        <div className="max-w-[1400px] mx-auto px-8 flex items-center justify-between">
-          <p className="text-xs text-gray-600">TestGenius AI — Research-grade test generation for QA teams.</p>
-          <p className="text-xs text-gray-600">Built with FastAPI + React + Any LLM</p>
+      <footer className={`pt-16 pb-12 border-t transition-colors duration-300 ${isDark ? 'bg-slate-900 border-slate-800' : 'bg-white border-slate-100'}`}>
+        <div className="max-w-7xl mx-auto px-6">
+          <div className="grid grid-cols-2 md:grid-cols-5 gap-8 mb-16">
+            <div className="col-span-2">
+              <div className={`flex items-center gap-2 mb-6 ${isDark ? 'text-white' : 'text-slate-900'}`}><span className="text-xl">🧪</span><span className="font-bold text-base tracking-tight">TestGenius AI</span></div>
+              <p className={`text-sm max-w-xs ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>AI-powered test case generation for QA teams. Multi-agent iterative refinement inspired by MuTAP research.</p>
+            </div>
+            {[{ heading: "Product", links: ["Multi-Agent Pipeline", "Code Analysis", "Mutation Testing", "Security Scanner"] }, { heading: "Resources", links: ["API Docs", "Research Papers", "LLM Providers", "Changelog"] }, { heading: "Company", links: ["About", "GitHub", "MIT License", "Contact"] }].map(({ heading, links }) => (
+              <div key={heading} className="flex flex-col gap-4">
+                <h4 className={`font-semibold text-sm ${isDark ? 'text-white' : 'text-slate-900'}`}>{heading}</h4>
+                {links.map((l) => (<a key={l} href="#" className={`text-sm transition-colors ${isDark ? 'text-slate-400 hover:text-white' : 'text-slate-500 hover:text-slate-900'}`}>{l}</a>))}
+              </div>
+            ))}
+          </div>
+          <div className={`flex flex-col md:flex-row justify-between items-center gap-6 pt-8 border-t ${isDark ? 'border-slate-800' : 'border-slate-100'}`}>
+            <div className={`text-sm ${isDark ? 'text-slate-400' : 'text-slate-500'}`}>© {new Date().getFullYear()} TestGenius AI</div>
+            <div className="flex gap-6">
+              <a href="https://github.com/MUTHUKUMARAN-K-1" target="_blank" rel="noopener noreferrer" className={`transition-colors ${isDark ? 'text-slate-500 hover:text-white' : 'text-slate-400 hover:text-slate-900'}`}><GithubIcon /></a>
+              <a href="#" className={`transition-colors ${isDark ? 'text-slate-500 hover:text-white' : 'text-slate-400 hover:text-slate-900'}`}><TwitterIcon /></a>
+            </div>
+          </div>
         </div>
       </footer>
-
-      <style>{`
-        @keyframes gradient-x { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
-        .animate-gradient-x { background-size: 200% 200%; animation: gradient-x 3s ease infinite; }
-      `}</style>
     </div>
   );
 }

frontend/tailwind.config.js

@@ -1,14 +1,18 @@
 /** @type {import('tailwindcss').Config} */
 export default {
   content: ['./index.html', './src/**/*.{js,ts,jsx,tsx}'],
+  darkMode: 'class',
   theme: {
     extend: {
+      colors: {
+        primary: { DEFAULT: '#10b981', dark: '#059669' },
+      },
       fontFamily: {
-        sans: ['-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Inter', 'Roboto', 'sans-serif'],
+        sans: ['-apple-system', 'BlinkMacSystemFont', 'Inter', 'Segoe UI', 'Roboto', 'sans-serif'],
         mono: ['JetBrains Mono', 'Fira Code', 'Menlo', 'Monaco', 'monospace'],
       },
       animation: {
-        'fade-in': 'fadeIn 0.3s ease-out',
+        'fade-in': 'fadeIn 0.4s ease-out',
         'shimmer': 'shimmer 2s infinite',
       },
     },