// Accent colour rotation
const accents=["#00b9f9","#00ff9f","#ff0066","#ffaa00"];
let i=0;
setInterval(()=>{
  document.documentElement.style.setProperty("--accent",accents[i]);
  i=(i+1)%accents.length;
},6000);

// Tagline rotation
const taglines=[
  "Shaping the Future of Intelligence",
  "Ethical • Intelligent • Limitless",
  "Engineering Tomorrow’s Minds"
];
let t=0;
setInterval(()=>{
  document.getElementById("tagline").textContent=taglines[t];
  t=(t+1)%taglines.length;
},8000);

// Auto-update footer date
document.getElementById("policy-date").textContent=new Date().toISOString().split("T")[0];

// Email form
const form=document.getElementById("emailForm");
form.addEventListener("submit",async e=>{
  e.preventDefault();
  const msg=document.getElementById("msg");
  if(!document.getElementById("consent").checked){msg.textContent="⚠️ Please accept the privacy policy.";return;}
  try{
    await fetch("https://formspree.io/f/your_form_id",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:document.getElementById("email").value})});
    msg.textContent="✅ Thank you! We'll keep you updated.";
    form.reset();
  }catch(err){msg.textContent="⚠️ Network error. Try again later.";}
});

// Simple IQ tester
const questions=[
  {q:"AI ethics primarily concern?",a:["Moral use of AI","Training speed","Hardware cooling"],c:0},
  {q:"Which is an AI language model?",a:["TensorFlow","ChatGPT","Photoshop"],c:1},
  {q:"Data privacy is part of?",a:["AI ethics","GPU optimization","Image rendering"],c:0}
];
const startBtn=document.getElementById("startIQ");
const quiz=document.getElementById("quiz");
const question=document.getElementById("question");
const answers=document.getElementById("answers");
const next=document.getElementById("next");
const result=document.getElementById("result");
let index=0,score=0;

startBtn.onclick=()=>{
  startBtn.style.display="none";
  quiz.classList.remove("hidden");
  loadQ();
};
function loadQ(){
  question.textContent=questions[index].q;
  answers.innerHTML="";
  questions[index].a.forEach((opt,i)=>{
    const b=document.createElement("button");
    b.textContent=opt;
    b.onclick=()=>{if(i===questions[index].c)score++;next.disabled=false;};
    answers.appendChild(b);
  });
  next.disabled=true;
}
next.onclick=()=>{
  index++;
  if(index<questions.length){loadQ();}
  else{
    quiz.classList.add("hidden");
    result.textContent=`Your AI IQ score: ${score}/${questions.length}`;
  }
};