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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Start - Interactive Onboarding</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&display=swap" rel="stylesheet">
    <style>
        body {
            font-family: 'Inter', sans-serif;
            overflow: hidden;
            background-color: #0f172a;
        }

        /* Custom Animations */
        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
        }

        @keyframes pulse-glow {
            0%, 100% { box-shadow: 0 0 20px rgba(56, 189, 248, 0.5); }
            50% { box-shadow: 0 0 40px rgba(56, 189, 248, 0.8); }
        }

        @keyframes slide-up-fade {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes gradient-shift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .animate-float { animation: float 6s ease-in-out infinite; }
        .animate-float-delayed { animation: float 6s ease-in-out 3s infinite; }
        
        .glass-panel {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
        }

        .gradient-text {
            background: linear-gradient(135deg, #60a5fa 0%, #c084fc 50%, #f472b6 100%);
            background-size: 200% auto;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: gradient-shift 5s ease infinite;
        }

        .step-transition {
            transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
        }

        /* Custom Scrollbar for content areas if needed */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: transparent; }
        ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 3px; }

        .selection-card {
            transition: all 0.3s ease;
        }
        .selection-card:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .selection-card.selected {
            background: rgba(56, 189, 248, 0.15);
            border-color: #38bdf8;
            box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
        }

        .loader-bar {
            transition: width 1s ease-in-out;
        }
    </style>
</head>
<body class="text-white h-screen w-screen relative">

    <!-- Background Canvas for Particles -->
    <canvas id="bgCanvas" class="absolute inset-0 z-0"></canvas>

    <!-- Overlay Gradient -->
    <div class="absolute inset-0 z-0 bg-gradient-to-b from-slate-900/80 via-slate-900/50 to-slate-900/90 pointer-events-none"></div>

    <!-- Main Application Container -->
    <main class="relative z-10 h-full w-full flex flex-col items-center justify-center p-6">
        
        <!-- Header / Logo Area -->
        <header class="absolute top-8 left-0 w-full flex justify-between items-center px-8 md:px-16">
            <div class="flex items-center gap-3 group cursor-pointer">
                <div class="w-10 h-10 rounded-xl bg-gradient-to-br from-blue-500 to-purple-600 flex items-center justify-center shadow-lg group-hover:scale-110 transition-transform">
                    <i class="fa-solid fa-rocket text-white text-lg"></i>
                </div>
                <span class="text-xl font-bold tracking-tight">Nexus<span class="text-blue-400">Start</span></span>
            </div>
            <div class="hidden md:flex items-center gap-4 text-sm text-slate-400">
                <span>v2.4.0</span>
                <div class="h-4 w-px bg-slate-700"></div>
                <span class="hover:text-white cursor-pointer transition-colors">Help</span>
            </div>
            <a href="https://huggingface.co/spaces/akhaliq/anycoder" target="_blank" class="text-xs text-slate-500 hover:text-blue-400 transition-colors flex items-center gap-2">
                <i class="fa-solid fa-code"></i> Built with anycoder
            </a>
        </header>

        <!-- Progress Bar (Top Center) -->
        <div class="absolute top-8 left-1/2 -translate-x-1/2 w-64 h-1 bg-slate-800 rounded-full overflow-hidden hidden md:block">
            <div id="progressBar" class="h-full bg-gradient-to-r from-blue-500 to-purple-500 w-0 loader-bar"></div>
        </div>

        <!-- Content Area -->
        <div id="app-container" class="w-full max-w-4xl h-[600px] relative perspective-1000">
            
            <!-- STEP 1: Hero / Welcome -->
            <section id="step-1" class="step-section absolute inset-0 flex flex-col items-center justify-center text-center step-transition opacity-100 translate-y-0">
                <div class="relative mb-8 animate-float">
                    <div class="absolute inset-0 bg-blue-500 blur-3xl opacity-20 rounded-full"></div>
                    <img src="https://images.unsplash.com/photo-1618005182384-a83a8bd57fbe?q=80&w=1000&auto=format&fit=crop" 
                         alt="Abstract 3D" 
                         class="w-48 h-48 object-cover rounded-full border-4 border-white/10 shadow-2xl relative z-10 mask-image-gradient">
                </div>
                
                <h1 class="text-5xl md:text-7xl font-extrabold mb-6 tracking-tight">
                    Ready to <span class="gradient-text">Start?</span>
                </h1>
                <p class="text-slate-400 text-lg md:text-xl max-w-lg mb-10 leading-relaxed">
                    Experience the next generation of digital workflow. Seamless, powerful, and designed for creators.
                </p>
                
                <button onclick="app.nextStep()" class="group relative px-8 py-4 bg-white text-slate-900 rounded-full font-bold text-lg overflow-hidden transition-all hover:scale-105 hover:shadow-[0_0_40px_rgba(255,255,255,0.3)]">
                    <span class="relative z-10 flex items-center gap-2">
                        Get Started <i class="fa-solid fa-arrow-right group-hover:translate-x-1 transition-transform"></i>
                    </span>
                    <div class="absolute inset-0 bg-gradient-to-r from-blue-200 to-purple-200 opacity-0 group-hover:opacity-100 transition-opacity"></div>
                </button>
            </section>

            <!-- STEP 2: Role Selection -->
            <section id="step-2" class="step-section absolute inset-0 flex flex-col items-center justify-center step-transition opacity-0 translate-y-10 pointer-events-none">
                <h2 class="text-3xl md:text-4xl font-bold mb-2">What describes you best?</h2>
                <p class="text-slate-400 mb-10">We'll customize your dashboard based on your role.</p>
                
                <div class="grid grid-cols-1 md:grid-cols-3 gap-6 w-full px-4">
                    <!-- Card 1 -->
                    <div class="selection-card glass-panel p-6 rounded-2xl cursor-pointer border border-white/5" onclick="app.selectRole('developer', this)">
                        <div class="w-12 h-12 rounded-lg bg-blue-500/20 text-blue-400 flex items-center justify-center mb-4 text-xl">
                            <i class="fa-solid fa-code"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-2">Developer</h3>
                        <p class="text-sm text-slate-400">Building the future with code, APIs, and logic.</p>
                    </div>
                    <!-- Card 2 -->
                    <div class="selection-card glass-panel p-6 rounded-2xl cursor-pointer border border-white/5" onclick="app.selectRole('designer', this)">
                        <div class="w-12 h-12 rounded-lg bg-purple-500/20 text-purple-400 flex items-center justify-center mb-4 text-xl">
                            <i class="fa-solid fa-pen-nib"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-2">Designer</h3>
                        <p class="text-sm text-slate-400">Crafting visual experiences and user interfaces.</p>
                    </div>
                    <!-- Card 3 -->
                    <div class="selection-card glass-panel p-6 rounded-2xl cursor-pointer border border-white/5" onclick="app.selectRole('manager', this)">
                        <div class="w-12 h-12 rounded-lg bg-pink-500/20 text-pink-400 flex items-center justify-center mb-4 text-xl">
                            <i class="fa-solid fa-chart-line"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-2">Manager</h3>
                        <p class="text-sm text-slate-400">Leading teams, tracking progress, and strategy.</p>
                    </div>
                </div>
            </section>

            <!-- STEP 3: Interests / Features -->
            <section id="step-3" class="step-section absolute inset-0 flex flex-col items-center justify-center step-transition opacity-0 translate-y-10 pointer-events-none">
                <h2 class="text-3xl md:text-4xl font-bold mb-2">Select your interests</h2>
                <p class="text-slate-400 mb-8">Pick at least 2 topics to personalize your feed.</p>
                
                <div class="flex flex-wrap justify-center gap-3 max-w-2xl mb-10" id="tags-container">
                    <!-- Tags generated by JS -->
                </div>

                <button id="btn-step-3" onclick="app.nextStep()" class="px-8 py-3 bg-slate-700 text-slate-400 rounded-full font-semibold transition-all cursor-not-allowed" disabled>
                    Continue
                </button>
            </section>

            <!-- STEP 4: Processing / Loading -->
            <section id="step-4" class="step-section absolute inset-0 flex flex-col items-center justify-center step-transition opacity-0 translate-y-10 pointer-events-none">
                <div class="relative w-32 h-32 mb-8">
                    <div class="absolute inset-0 border-4 border-slate-700 rounded-full"></div>
                    <div class="absolute inset-0 border-4 border-t-blue-500 border-r-transparent border-b-purple-500 border-l-transparent rounded-full animate-spin"></div>
                    <div class="absolute inset-0 flex items-center justify-center text-2xl font-bold" id="loading-percentage">0%</div>
                </div>
                <h2 class="text-2xl font-bold mb-2 animate-pulse">Setting up your workspace...</h2>
                <p class="text-slate-400 text-sm" id="loading-text">Initializing core modules...</p>
            </section>

            <!-- STEP 5: Success / Dashboard Preview -->
            <section id="step-5" class="step-section absolute inset-0 flex flex-col items-center justify-center step-transition opacity-0 translate-y-10 pointer-events-none scale-95">
                <div class="glass-panel p-8 rounded-3xl border border-white/10 shadow-2xl max-w-md w-full text-center relative overflow-hidden">
                    <!-- Confetti Canvas Layer inside card -->
                    <canvas id="confettiCanvas" class="absolute inset-0 pointer-events-none z-0"></canvas>
                    
                    <div class="relative z-10">
                        <div class="w-20 h-20 bg-green-500 rounded-full flex items-center justify-center mx-auto mb-6 shadow-[0_0_30px_rgba(34,197,94,0.5)] animate-[bounce_1s_infinite]">
                            <i class="fa-solid fa-check text-3xl text-white"></i>
                        </div>
                        <h2 class="text-3xl font-bold mb-2">You're all set!</h2>
                        <p class="text-slate-300 mb-8">Welcome aboard, <span id="user-role-display" class="text-blue-400 font-semibold">Creator</span>.</p>
                        
                        <div class="space-y-3">
                            <button onclick="location.reload()" class="w-full py-3 bg-gradient-to-r from-blue-600 to-purple-600 rounded-xl font-bold hover:shadow-lg hover:scale-[1.02] transition-all">
                                Launch Dashboard
                            </button>
                            <button onclick="location.reload()" class="w-full py-3 bg-transparent border border-white/10 rounded-xl font-medium hover:bg-white/5 transition-all text-slate-400 hover:text-white">
                                Restart Demo
                            </button>
                        </div>
                    </div>
                </div>
            </section>

        </div>

        <!-- Navigation Controls -->
        <div class="absolute bottom-8 flex gap-4">
            <button id="btn-prev" onclick="app.prevStep()" class="w-12 h-12 rounded-full glass-panel flex items-center justify-center hover:bg-white/10 transition-all opacity-0 pointer-events-none">
                <i class="fa-solid fa-arrow-left"></i>
            </button>
            <div class="flex gap-2 items-center" id="dots-container">
                <div class="w-2 h-2 rounded-full bg-white transition-all duration-300"></div>
                <div class="w-2 h-2 rounded-full bg-slate-600 transition-all duration-300"></div>
                <div class="w-2 h-2 rounded-full bg-slate-600 transition-all duration-300"></div>
                <div class="w-2 h-2 rounded-full bg-slate-600 transition-all duration-300"></div>
                <div class="w-2 h-2 rounded-full bg-slate-600 transition-all duration-300"></div>
            </div>
        </div>

    </main>

    <script>
        /**
         * Application Logic
         */
        const app = {
            currentStep: 1,
            totalSteps: 5,
            selectedRole: null,
            selectedTags: new Set(),
            
            // Data for Step 3
            tags: [
                "UI/UX Design", "Machine Learning", "Web3", "Mobile Dev", 
                "DevOps", "Marketing", "SaaS", "E-commerce", "Open Source",
                "Cloud Computing", "Data Science", "Cybersecurity"
            ],

            init() {
                this.renderTags();
                this.initCanvas();
                this.updateUI();
            },

            nextStep() {
                if (this.currentStep < this.totalSteps) {
                    this.transition(this.currentStep, this.currentStep + 1);
                    this.currentStep++;
                    this.updateUI();
                    
                    if (this.currentStep === 4) this.simulateLoading();
                    if (this.currentStep === 5) this.triggerConfetti();
                }
            },

            prevStep() {
                if (this.currentStep > 1) {
                    this.transition(this.currentStep, this.currentStep - 1);
                    this.currentStep--;
                    this.updateUI();
                }
            },

            transition(from, to) {
                const fromEl = document.getElementById(`step-${from}`);
                const toEl = document.getElementById(`step-${to}`);

                // Animate Out
                fromEl.style.opacity = '0';
                fromEl.style.transform = 'translateY(-20px) scale(0.95)';
                fromEl.style.pointerEvents = 'none';

                // Animate In
                setTimeout(() => {
                    toEl.style.opacity = '1';
                    toEl.style.transform = 'translateY(0) scale(1)';
                    toEl.style.pointerEvents = 'auto';
                }, 300);
            },

            updateUI() {
                // Progress Bar
                const progress = ((this.currentStep - 1) / (this.totalSteps - 1)) * 100;
                document.getElementById('progressBar').style.width = `${progress}%`;

                // Prev Button
                const prevBtn = document.getElementById('btn-prev');
                if (this.currentStep > 1 && this.currentStep < 5) {
                    prevBtn.style.opacity = '1';
                    prevBtn.style.pointerEvents = 'auto';
                } else {
                    prevBtn.style.opacity = '0';
                    prevBtn.style.pointerEvents = 'none';
                }

                // Dots
                const dots = document.getElementById('dots-container').children;
                Array.from(dots).forEach((dot, index) => {
                    if (index + 1 === this.currentStep) {
                        dot.classList.remove('bg-slate-600');
                        dot.classList.add('bg-white', 'scale-125');
                    } else {
                        dot.classList.add('bg-slate-600');
                        dot.classList.remove('bg-white', 'scale-125');
                    }
                });
            },

            selectRole(role, element) {
                this.selectedRole = role;
                
                // Visual selection
                document.querySelectorAll('.selection-card').forEach(el => el.classList.remove('selected'));
                element.classList.add('selected');

                // Auto advance after short delay
                setTimeout(() => this.nextStep(), 600);
            },

            renderTags() {
                const container = document.getElementById('tags-container');
                container.innerHTML = this.tags.map(tag => `
                    <button class="px-4 py-2 rounded-full border border-slate-600 text-slate-300 text-sm hover:border-blue-400 hover:text-blue-400 transition-all select-none" 
                            onclick="app.toggleTag(this, '${tag}')">
                        ${tag}
                    </button>
                `).join('');
            },

            toggleTag(btn, tag) {
                if (this.selectedTags.has(tag)) {
                    this.selectedTags.delete(tag);
                    btn.classList.remove('bg-blue-500', 'border-blue-500', 'text-white');
                    btn.classList.add('border-slate-600', 'text-slate-300');
                } else {
                    this.selectedTags.add(tag);
                    btn.classList.add('bg-blue-500', 'border-blue-500', 'text-white');
                    btn.classList.remove('border-slate-600', 'text-slate-300');
                }
                this.validateStep3();
            },

            validateStep3() {
                const btn = document.getElementById('btn-step-3');
                if (this.selectedTags.size >= 2) {
                    btn.removeAttribute('disabled');
                    btn.classList.remove('bg-slate-700', 'text-slate-400', 'cursor-not-allowed');
                    btn.classList.add('bg-white', 'text-slate-900', 'hover:scale-105', 'shadow-lg');
                } else {
                    btn.setAttribute('disabled', 'true');
                    btn.classList.add('bg-slate-700', 'text-slate-400', 'cursor-not-allowed');
                    btn.classList.remove('bg-white', 'text-slate-900', 'hover:scale-105', 'shadow-lg');
                }
            },

            simulateLoading() {
                const percentageEl = document.getElementById('loading-percentage');
                const textEl = document.getElementById('loading-text');
                let progress = 0;
                
                const texts = [
                    "Initializing core modules...",
                    "Loading user preferences...",
                    "Compiling assets...",
                    "Connecting to server...",
                    "Finalizing setup..."
                ];

                const interval = setInterval(() => {
                    progress += Math.floor(Math.random() * 5) + 1;
                    if (progress > 100) progress = 100;
                    
                    percentageEl.innerText = `${progress}%`;
                    
                    // Update text based on progress
                    const textIndex = Math.floor((progress / 100) * texts.length);
                    if (texts[textIndex]) textEl.innerText = texts[textIndex];

                    if (progress === 100) {
                        clearInterval(interval);
                        setTimeout(() => this.nextStep(), 500);
                    }
                }, 50);
            },

            triggerConfetti() {
                const canvas = document.getElementById('confettiCanvas');
                const ctx = canvas.getContext('2d');
                canvas.width = canvas.parentElement.offsetWidth;
                canvas.height = canvas.parentElement.offsetHeight;

                const particles = [];
                const colors = ['#60a5fa', '#c084fc', '#f472b6', '#ffffff'];

                for (let i = 0; i < 100; i++) {
                    particles.push({
                        x: canvas.width / 2,
                        y: canvas.height / 2,
                        vx: (Math.random() - 0.5) * 10,
                        vy: (Math.random() - 0.5) * 10 - 5,
                        size: Math.random() * 5 + 2,
                        color: colors[Math.floor(Math.random() * colors.length)],
                        life: 100
                    });
                }

                const animate = () => {
                    ctx.clearRect(0, 0, canvas.width, canvas.height);
                    let active = false;

                    particles.forEach(p => {
                        if (p.life > 0) {
                            active = true;
                            p.x += p.vx;
                            p.y += p.vy;
                            p.vy += 0.2; // gravity
                            p.life--;
                            p.size *= 0.96;

                            ctx.fillStyle = p.color;
                            ctx.beginPath();
                            ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
                            ctx.fill();
                        }
                    });

                    if (active) requestAnimationFrame(animate);
                };
                animate();
                
                // Update role text
                const roleText = this.selectedRole ? this.selectedRole.charAt(0).toUpperCase() + this.selectedRole.slice(1) : "Creator";
                document.getElementById('user-role-display').innerText = roleText;
            },

            initCanvas() {
                // Background Particle Network
                const canvas = document.getElementById('bgCanvas');
                const ctx = canvas.getContext('2d');
                
                let width, height;
                let particles = [];

                const resize = () => {
                    width = window.innerWidth;
                    height = window.innerHeight;
                    canvas.width = width;
                    canvas.height = height;
                    createParticles();
                };

                const createParticles = () => {
                    particles = [];
                    const count = Math.floor((width * height) / 15000);
                    for (let i = 0; i < count; i++) {
                        particles.push({
                            x: Math.random() * width,
                            y: Math.random() * height,
                            vx: (Math.random() - 0.5) * 0.5,
                            vy: (Math.random() - 0.5) * 0.5,
                            size: Math.random() * 2
                        });
                    }
                };

                const animate = () => {
                    ctx.clearRect(0, 0, width, height);
                    ctx.fillStyle = 'rgba(255, 255, 255, 0.5)';
                    
                    particles.forEach((p, i) => {
                        p.x += p.vx;
                        p.y += p.vy;

                        if (p.x < 0 || p.x > width) p.vx *= -1;
                        if (p.y < 0 || p.y > height) p.vy *= -1;

                        ctx.beginPath();
                        ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
                        ctx.fill();

                        // Connections
                        for (let j = i + 1; j < particles.length; j++) {
                            const p2 = particles[j];
                            const dx = p.x - p2.x;
                            const dy = p.y - p2.y;
                            const dist = Math.sqrt(dx*dx + dy*dy);

                            if (dist < 100) {
                                ctx.strokeStyle = `rgba(255, 255, 255, ${0.1 - dist/1000})`;
                                ctx.lineWidth = 1;
                                ctx.beginPath();
                                ctx.moveTo(p.x, p.y);
                                ctx.lineTo(p2.x, p2.y);
                                ctx.stroke();
                            }
                        }
                    });
                    requestAnimationFrame(animate);
                };

                window.addEventListener('resize', resize);
                resize();
                animate();
            }
        };

        // Initialize on load
        document.addEventListener('DOMContentLoaded', () => {
            app.init();
        });
    </script>
</body>
</html>