agentlens/apps/web/src/app/page.tsx

import {
  Activity,
  Brain,
  DollarSign,
  ArrowRight,
  CheckCircle2,
  GitBranch,
  Cpu,
  Zap,
} from "lucide-react";

export default function HomePage() {
  return (
    <div className="min-h-screen bg-neutral-950">
      {/* Hero Section */}
      <section className="relative overflow-hidden border-b border-neutral-800/50">
        <div className="absolute inset-0 bg-gradient-to-b from-emerald-500/5 via-transparent to-transparent" />
        <div className="absolute inset-0 bg-[radial-gradient(ellipse_80%_50%_at_50%_-20%,rgba(16,185,129,0.1),transparent)]" />

        <div className="relative max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 pt-20 pb-24">
          <div className="text-center">
            <div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-emerald-500/20 bg-emerald-500/5 text-emerald-400 text-sm mb-8">
              <Zap className="w-4 h-4" />
              <span>Agent Observability Platform</span>
            </div>

            <h1 className="text-6xl sm:text-7xl md:text-8xl font-bold tracking-tight mb-6">
              <span className="bg-gradient-to-br from-emerald-400 via-emerald-300 to-emerald-500 bg-clip-text text-transparent">
                AgentLens
              </span>
            </h1>

            <p className="text-xl sm:text-2xl text-neutral-400 max-w-3xl mx-auto mb-10 leading-relaxed">
              See why your AI agents make the decisions they make. <br className="hidden sm:block" />
              Complete observability for multi-agent systems.
            </p>

            <div className="flex flex-col sm:flex-row gap-4 justify-center items-center">
              <button className="group px-8 py-4 bg-emerald-500 hover:bg-emerald-400 text-neutral-950 font-semibold rounded-lg transition-all duration-200 flex items-center gap-2 shadow-lg shadow-emerald-500/25 hover:shadow-emerald-500/40">
                Get Started
                <ArrowRight className="w-5 h-5 group-hover:translate-x-1 transition-transform" />
              </button>
              <a
                href="https://gitea.repi.fun/repi/agentlens"
                target="_blank"
                rel="noopener noreferrer"
                className="px-8 py-4 border border-neutral-700 hover:border-neutral-600 text-neutral-300 font-medium rounded-lg transition-all duration-200"
              >
                View Source
              </a>
            </div>
          </div>
        </div>
      </section>

      {/* Features Section */}
      <section className="py-24 border-b border-neutral-800/50">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="text-center mb-16">
            <h2 className="text-3xl sm:text-4xl font-bold mb-4">
              Everything you need to understand your agents
            </h2>
            <p className="text-lg text-neutral-400 max-w-2xl mx-auto">
              From decision trees to cost intelligence, get complete visibility into how your AI systems operate
            </p>
          </div>

          <div className="grid md:grid-cols-3 gap-8">
            {/* Feature 1: Decision Trees */}
            <div className="group p-8 rounded-2xl border border-neutral-800/50 bg-gradient-to-b from-neutral-900/50 to-transparent hover:border-emerald-500/30 transition-all duration-300">
              <div className="w-14 h-14 rounded-xl bg-emerald-500/10 flex items-center justify-center mb-6 group-hover:scale-110 transition-transform duration-300">
                <GitBranch className="w-7 h-7 text-emerald-400" />
              </div>
              <h3 className="text-xl font-semibold mb-3">Decision Trees</h3>
              <p className="text-neutral-400 leading-relaxed">
                Visualize the complete reasoning behind every agent choice. See the branching logic, alternatives considered, and the path chosen.
              </p>
            </div>

            {/* Feature 2: Context Awareness */}
            <div className="group p-8 rounded-2xl border border-neutral-800/50 bg-gradient-to-b from-neutral-900/50 to-transparent hover:border-emerald-500/30 transition-all duration-300">
              <div className="w-14 h-14 rounded-xl bg-emerald-500/10 flex items-center justify-center mb-6 group-hover:scale-110 transition-transform duration-300">
                <Brain className="w-7 h-7 text-emerald-400" />
              </div>
              <h3 className="text-xl font-semibold mb-3">Context Awareness</h3>
              <p className="text-neutral-400 leading-relaxed">
                Monitor context window utilization in real-time. Track what's being fed into your agents and what's being left behind.
              </p>
            </div>

            {/* Feature 3: Cost Intelligence */}
            <div className="group p-8 rounded-2xl border border-neutral-800/50 bg-gradient-to-b from-neutral-900/50 to-transparent hover:border-emerald-500/30 transition-all duration-300">
              <div className="w-14 h-14 rounded-xl bg-emerald-500/10 flex items-center justify-center mb-6 group-hover:scale-110 transition-transform duration-300">
                <DollarSign className="w-7 h-7 text-emerald-400" />
              </div>
              <h3 className="text-xl font-semibold mb-3">Cost Intelligence</h3>
              <p className="text-neutral-400 leading-relaxed">
                Track spending per decision, per agent, per trace. Get granular insights into where every dollar goes in your AI operations.
              </p>
            </div>
          </div>
        </div>
      </section>

      {/* Code Example Section */}
      <section className="py-24 border-b border-neutral-800/50">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="grid lg:grid-cols-2 gap-12 items-center">
            <div>
              <div className="inline-flex items-center gap-2 px-4 py-2 rounded-full border border-neutral-700 bg-neutral-800/30 text-neutral-400 text-sm mb-6">
                <Cpu className="w-4 h-4" />
                <span>Python SDK</span>
              </div>

              <h2 className="text-3xl sm:text-4xl font-bold mb-4">
                Instrument your agents in minutes
              </h2>
              <p className="text-lg text-neutral-400 mb-8 leading-relaxed">
                Our Python SDK integrates seamlessly with LangChain, OpenAI, and custom agents. Add observability without changing your architecture.
              </p>

              <ul className="space-y-4">
                {[
                  "Drop-in decorators for automatic tracing",
                  "No code changes required for LangChain",
                  "Async-first design with minimal overhead",
                  "Type-safe with full IDE support",
                ].map((feature, i) => (
                  <li key={i} className="flex items-start gap-3">
                    <div className="w-6 h-6 rounded-full bg-emerald-500/20 flex items-center justify-center flex-shrink-0 mt-0.5">
                      <CheckCircle2 className="w-4 h-4 text-emerald-400" />
                    </div>
                    <span className="text-neutral-300">{feature}</span>
                  </li>
                ))}
              </ul>
            </div>

            {/* Code Block */}
            <div className="rounded-xl overflow-hidden border border-neutral-800 bg-neutral-900/50 backdrop-blur-sm">
              <div className="px-4 py-3 border-b border-neutral-800 flex items-center gap-2">
                <div className="flex gap-2">
                  <div className="w-3 h-3 rounded-full bg-neutral-600" />
                  <div className="w-3 h-3 rounded-full bg-neutral-600" />
                  <div className="w-3 h-3 rounded-full bg-neutral-600" />
                </div>
                <span className="ml-4 text-sm text-neutral-500">example.py</span>
              </div>
              <pre className="p-6 overflow-x-auto text-sm">
                <code className="text-neutral-300">
                  <span className="text-purple-400">from</span> <span className="text-neutral-300">agentlens</span> <span className="text-purple-400">import</span> <span className="text-emerald-300">init</span><span className="text-neutral-300">,</span> <span className="text-emerald-300">trace</span>
                  <br />
                  <br />
                  <span className="text-neutral-500"># Initialize AgentLens</span>
                  <br />
                  <span className="text-emerald-300">init</span><span className="text-neutral-300">(</span>
                  <br />
                  &nbsp;&nbsp;&nbsp;&nbsp;<span className="text-orange-300">api_key</span><span className="text-neutral-300">=</span><span className="text-emerald-300">"your-api-key"</span><span className="text-neutral-300">,</span>
                  <br />
                  &nbsp;&nbsp;&nbsp;&nbsp;<span className="text-orange-300">endpoint</span><span className="text-neutral-300">=</span><span className="text-emerald-300">"https://agentlens.vectry.tech"</span>
                  <br />
                  <span className="text-neutral-300">)</span>
                  <br />
                  <br />
                  <span className="text-neutral-500"># Trace your agent function</span>
                  <br />
                  <span className="text-purple-400">@trace</span><span className="text-neutral-300">(</span><span className="text-orange-300">name</span><span className="text-neutral-300">=</span><span className="text-emerald-300">"research-agent"</span><span className="text-neutral-300">)</span>
                  <br />
                  <span className="text-purple-400">async</span> <span className="text-purple-400">def</span> <span className="text-emerald-300">research</span><span className="text-neutral-300">(</span><span className="text-blue-300">topic</span><span className="text-neutral-300">:</span> <span className="text-blue-300">str</span><span className="text-neutral-300">):</span>
                  <br />
                  &nbsp;&nbsp;&nbsp;&nbsp;<span className="text-neutral-500"># Your agent logic here</span>
                  <br />
                  &nbsp;&nbsp;&nbsp;&nbsp;<span className="text-purple-400">return</span> <span className="text-emerald-300">f"Researching: {"{topic"}"</span>

                </code>
              </pre>
            </div>
          </div>
        </div>
      </section>

      {/* Footer */}
      <footer className="py-12 border-t border-neutral-800/50">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex flex-col md:flex-row justify-between items-center gap-6">
            <div className="flex items-center gap-2">
              <div className="w-8 h-8 rounded bg-gradient-to-br from-emerald-400 to-emerald-600 flex items-center justify-center">
                <Activity className="w-5 h-5 text-white" />
              </div>
              <span className="font-semibold text-lg">AgentLens</span>
            </div>

            <div className="flex items-center gap-8 text-sm text-neutral-400">
              <a href="https://vectry.tech" target="_blank" rel="noopener noreferrer" className="hover:text-emerald-400 transition-colors">
                Built by Vectry
              </a>
              <a href="https://gitea.repi.fun/repi/agentlens" target="_blank" rel="noopener noreferrer" className="hover:text-emerald-400 transition-colors">
                Source Code
              </a>
              <a href="https://agentlens.vectry.tech/docs" target="_blank" rel="noopener noreferrer" className="hover:text-emerald-400 transition-colors">
                Documentation
              </a>
            </div>

            <div className="text-sm text-neutral-500">
              MIT License © 2026 Vectry
            </div>
          </div>
        </div>
      </footer>
    </div>
  );
}