/* ═══════════════════════════════════════════════════════════
   Kwizou — Homepage
   Editorial direction: warm cream + indigo + quiz accents
   Typography: Fraunces (serif display) + Geist (sans body)
   ═══════════════════════════════════════════════════════════ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

:root{
  /* Palette */
  --cream:#FAF7F2;
  --cream-2:#F2EDE3;
  --ink:#1A1915;
  --ink-soft:#3A3830;
  --ink-dim:#6E6A5E;
  --ink-light:#A39E90;
  --line:#E5DFD1;
  --indigo:#4F3DDE;
  --indigo-dark:#3A2CB3;
  --indigo-soft:#E8E4FB;
  --orange:#E8552B;
  --red:#E21B3C;
  --blue:#1368CE;
  --gold:#D89E00;
  --green:#26890C;

  /* Typography */
  --font-display:'Fraunces','DM Serif Display',Georgia,serif;
  --font-body:'Geist','Inter',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',monospace;

  /* Layout */
  --max:1200px;
  --radius:14px;
  --radius-lg:24px;
  --shadow-sm:0 1px 2px rgba(26,25,21,0.04),0 2px 4px rgba(26,25,21,0.03);
  --shadow-md:0 4px 12px rgba(26,25,21,0.06),0 12px 32px rgba(26,25,21,0.08);
  --shadow-lg:0 20px 60px rgba(26,25,21,0.12);
}

body{
  font-family:var(--font-body);
  background:var(--cream);
  color:var(--ink);
  line-height:1.55;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* Subtle grain overlay for warmth */
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:1;opacity:0.4;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9'/><feColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.1 0 0 0 0 0.1 0 0 0 0.03 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 22px;border-radius:999px;
  font-family:var(--font-body);font-weight:600;font-size:15px;
  border:none;cursor:pointer;text-decoration:none;
  transition:all .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--ink);color:var(--cream)}
.btn-primary:hover{background:var(--indigo);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{background:var(--cream-2);border-color:var(--ink)}
.btn-accent{background:var(--indigo);color:white}
.btn-accent:hover{background:var(--indigo-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-lg{padding:16px 28px;font-size:16px}

/* ══════════════════════════
   NAV
   ══════════════════════════ */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(250,247,242,0.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .2s;
}
.nav.scrolled{border-color:var(--line)}
.nav-inner{
  max-width:var(--max);margin:0 auto;padding:18px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.nav-logo{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:600;font-size:24px;
  color:var(--ink);text-decoration:none;letter-spacing:-0.02em;
}
.nav-logo-mark{
  width:32px;height:32px;border-radius:10px;
  background:var(--ink);color:var(--cream);
  display:grid;place-items:center;font-size:16px;font-weight:700;
  font-family:var(--font-body);
}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{
  color:var(--ink-soft);text-decoration:none;font-size:15px;font-weight:500;
  transition:color .15s;
}
.nav-links a:hover{color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:12px}

@media (max-width:780px){
  .nav-links{display:none}
  .nav-inner{padding:14px 18px;gap:12px}
  .nav-cta .btn-ghost{display:none}
}

/* ══════════════════════════
   HERO
   ══════════════════════════ */
.hero{
  position:relative;
  max-width:var(--max);margin:0 auto;
  padding:80px 28px 100px;
  text-align:center;
}

.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--indigo-soft);color:var(--indigo-dark);
  font-size:13px;font-weight:600;letter-spacing:0.01em;
  margin-bottom:28px;
}
.hero-eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--indigo);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.4}}

.hero h1{
  font-family:var(--font-display);
  font-size:clamp(40px,7vw,84px);
  font-weight:400;
  line-height:0.98;
  letter-spacing:-0.035em;
  color:var(--ink);
  margin-bottom:28px;
  font-variation-settings:'opsz' 144,'SOFT' 30;
}
.hero h1 em{
  font-style:italic;font-weight:400;
  color:var(--indigo);
  font-variation-settings:'opsz' 144,'SOFT' 100;
}
.hero h1 .stamp{
  display:inline-block;transform:rotate(-2deg);
  padding:0 12px;background:var(--gold);color:var(--ink);
  font-style:normal;border-radius:8px;font-size:0.85em;
}
.hero p.lead{
  font-size:clamp(17px,2vw,21px);color:var(--ink-soft);
  max-width:620px;margin:0 auto 40px;line-height:1.5;
}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-meta{
  margin-top:36px;
  display:flex;gap:28px;justify-content:center;flex-wrap:wrap;
  color:var(--ink-dim);font-size:14px;
}
.hero-meta span{display:inline-flex;align-items:center;gap:6px}
.hero-meta svg{width:16px;height:16px}

/* Floating quiz cards decoration */
.hero-deco{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  overflow:hidden;
}
.deco-card{
  position:absolute;padding:14px 18px;border-radius:14px;
  font-weight:600;font-size:14px;box-shadow:var(--shadow-md);
  animation:float 8s ease-in-out infinite;
}
.deco-card.c1{top:18%;left:5%;background:var(--red);color:white;transform:rotate(-8deg);animation-delay:0s}
.deco-card.c2{top:28%;right:6%;background:var(--blue);color:white;transform:rotate(6deg);animation-delay:1.5s}
.deco-card.c3{bottom:22%;left:8%;background:var(--gold);color:var(--ink);transform:rotate(4deg);animation-delay:3s}
.deco-card.c4{bottom:16%;right:4%;background:var(--green);color:white;transform:rotate(-5deg);animation-delay:4.5s}
@keyframes float{0%,100%{transform:translateY(0) rotate(var(--r,0deg))}50%{transform:translateY(-12px) rotate(var(--r,0deg))}}
.deco-card.c1{--r:-8deg}.deco-card.c2{--r:6deg}.deco-card.c3{--r:4deg}.deco-card.c4{--r:-5deg}

@media (max-width:780px){
  .hero{padding:50px 18px 60px}
  .deco-card{display:none}
}

/* ══════════════════════════
   DEMO MOCKUP
   ══════════════════════════ */
.demo{
  max-width:1040px;margin:0 auto;padding:0 28px;
}
.demo-frame{
  background:linear-gradient(135deg,#2a1f5e 0%,#1a1033 100%);
  border-radius:var(--radius-lg);
  padding:40px 32px;
  box-shadow:var(--shadow-lg);
  position:relative;overflow:hidden;
}
.demo-frame::before{
  content:'';position:absolute;top:0;left:0;right:0;height:40px;
  background:rgba(0,0,0,0.15);
  display:flex;align-items:center;
}
.demo-dots{
  position:absolute;top:14px;left:18px;display:flex;gap:6px;
}
.demo-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,0.3)}
.demo-url{
  position:absolute;top:10px;left:50%;transform:translateX(-50%);
  background:rgba(255,255,255,0.1);color:rgba(255,255,255,0.6);
  padding:4px 16px;border-radius:8px;font-family:var(--font-mono);font-size:12px;
}
.demo-content{
  margin-top:30px;display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;
}
.demo-left{color:white;text-align:center}
.demo-code{
  font-family:var(--font-mono);font-size:14px;color:rgba(255,255,255,0.5);
  letter-spacing:0.1em;margin-bottom:8px;
}
.demo-bigcode{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(48px,7vw,88px);color:white;letter-spacing:0.04em;
  margin-bottom:20px;
}
.demo-hint{color:rgba(255,255,255,0.6);font-size:14px}
.demo-right{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.demo-choice{
  padding:22px 16px;border-radius:14px;color:white;font-weight:700;font-size:16px;
  text-align:left;position:relative;
  box-shadow:0 4px 12px rgba(0,0,0,0.2);
  transition:transform .2s;
}
.demo-choice:hover{transform:translateY(-3px)}
.demo-choice .shape{
  width:24px;height:24px;margin-bottom:8px;display:inline-block;
}
.demo-choice.a{background:var(--red)}
.demo-choice.b{background:var(--blue)}
.demo-choice.c{background:var(--gold);color:var(--ink)}
.demo-choice.d{background:var(--green)}
.demo-question{
  grid-column:1/-1;color:white;text-align:center;font-size:18px;font-weight:600;
  margin-bottom:8px;
}

@media (max-width:780px){
  .demo{padding:0 18px}
  .demo-frame{padding:50px 18px 24px}
  .demo-content{grid-template-columns:1fr;gap:24px}
  .demo-right{grid-template-columns:1fr 1fr}
}

/* ══════════════════════════
   SECTION — Generic
   ══════════════════════════ */
.section{
  max-width:var(--max);margin:0 auto;
  padding:100px 28px;
}
.section-label{
  font-family:var(--font-mono);font-size:12px;
  color:var(--ink-dim);text-transform:uppercase;letter-spacing:0.15em;
  margin-bottom:18px;
  display:flex;align-items:center;gap:10px;
}
.section-label::before{
  content:'';width:30px;height:1px;background:var(--ink-dim);
}
.section h2{
  font-family:var(--font-display);
  font-size:clamp(32px,5vw,56px);
  font-weight:400;line-height:1.05;letter-spacing:-0.025em;
  margin-bottom:24px;max-width:800px;
  font-variation-settings:'opsz' 144,'SOFT' 30;
}
.section h2 em{font-style:italic;color:var(--indigo);font-variation-settings:'opsz' 144,'SOFT' 100}
.section p.desc{
  font-size:18px;color:var(--ink-soft);max-width:680px;margin-bottom:48px;line-height:1.6;
}

@media (max-width:780px){
  .section{padding:60px 18px}
}

/* ══════════════════════════
   CREATED-BY (Par un prof)
   ══════════════════════════ */
.author{
  background:var(--cream-2);
  border-radius:var(--radius-lg);
  padding:60px 48px;
  display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:center;
  position:relative;overflow:hidden;
}
.author::before{
  content:'"';position:absolute;top:-40px;right:40px;
  font-family:var(--font-display);font-size:320px;color:var(--ink);
  opacity:0.04;line-height:1;font-weight:600;
}
.author-portrait{
  aspect-ratio:1;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,var(--indigo) 0%,var(--indigo-dark) 100%);
  display:grid;place-items:center;color:white;
  font-family:var(--font-display);font-size:120px;font-weight:600;
  box-shadow:var(--shadow-md);
}
.author-text{position:relative;z-index:1}
.author-text h3{
  font-family:var(--font-display);font-size:34px;font-weight:500;
  line-height:1.15;margin-bottom:18px;letter-spacing:-0.02em;
}
.author-text p{
  color:var(--ink-soft);font-size:17px;line-height:1.65;margin-bottom:14px;
}
.author-sign{
  margin-top:24px;font-family:var(--font-display);font-style:italic;
  font-size:20px;color:var(--ink);
}
.author-sign small{display:block;font-family:var(--font-body);font-style:normal;
  font-size:13px;color:var(--ink-dim);margin-top:2px;letter-spacing:0.05em;text-transform:uppercase}

@media (max-width:780px){
  .author{padding:36px 24px;grid-template-columns:1fr;gap:28px;text-align:center}
  .author-portrait{max-width:180px;margin:0 auto;font-size:80px}
}

/* ══════════════════════════
   FEATURES GRID
   ══════════════════════════ */
.features{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:24px;
}
.feature{
  background:white;border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:32px;
  transition:all .25s ease;
  position:relative;
}
.feature:hover{
  transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--ink);
}
.feature-icon{
  width:52px;height:52px;border-radius:14px;
  display:grid;place-items:center;
  margin-bottom:20px;font-size:24px;
  background:var(--indigo-soft);color:var(--indigo-dark);
}
.feature:nth-child(2) .feature-icon{background:#FDE9E5;color:var(--orange)}
.feature:nth-child(3) .feature-icon{background:#E4F1DE;color:var(--green)}
.feature:nth-child(4) .feature-icon{background:#FBF0D0;color:#A87C00}
.feature:nth-child(5) .feature-icon{background:#DFEAFA;color:var(--blue)}
.feature:nth-child(6) .feature-icon{background:#FCE0E6;color:var(--red)}
.feature h4{
  font-family:var(--font-display);font-size:22px;font-weight:500;
  margin-bottom:10px;letter-spacing:-0.01em;
}
.feature p{color:var(--ink-dim);font-size:15px;line-height:1.55}

/* ══════════════════════════
   HOW-IT-WORKS (3 steps)
   ══════════════════════════ */
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;counter-reset:step;
  position:relative;
}
.steps::before{
  content:'';position:absolute;left:5%;right:5%;top:32px;height:1px;
  background:repeating-linear-gradient(90deg,var(--ink-light) 0,var(--ink-light) 4px,transparent 4px,transparent 10px);
  z-index:0;
}
.step{
  background:var(--cream);position:relative;z-index:1;
  padding:0 12px;text-align:center;counter-increment:step;
}
.step-num{
  width:64px;height:64px;border-radius:50%;
  background:var(--ink);color:var(--cream);
  display:grid;place-items:center;
  font-family:var(--font-display);font-size:28px;font-weight:500;
  margin:0 auto 20px;
}
.step h4{font-family:var(--font-display);font-size:22px;font-weight:500;margin-bottom:10px}
.step p{color:var(--ink-soft);font-size:15px;line-height:1.55;max-width:260px;margin:0 auto}

@media (max-width:780px){
  .steps{grid-template-columns:1fr;gap:28px}
  .steps::before{display:none}
}

/* ══════════════════════════
   RGPD SECTION (dark, stamp feel)
   ══════════════════════════ */
.rgpd{
  background:var(--ink);color:var(--cream);
  border-radius:var(--radius-lg);
  padding:80px 48px;
  position:relative;overflow:hidden;
  margin:40px 0;
}
.rgpd::before{
  content:'RGPD';position:absolute;top:-60px;right:-20px;
  font-family:var(--font-display);font-weight:600;
  font-size:340px;color:rgba(255,255,255,0.04);
  line-height:1;letter-spacing:-0.04em;pointer-events:none;
  font-style:italic;
}
.rgpd-inner{max-width:900px;position:relative;z-index:1}
.rgpd .section-label{color:var(--gold)}
.rgpd .section-label::before{background:var(--gold)}
.rgpd h2{color:var(--cream);margin-bottom:28px}
.rgpd h2 em{color:var(--gold);font-style:italic}
.rgpd p.desc{color:rgba(250,247,242,0.75);max-width:720px}

.pledges{
  margin-top:40px;display:grid;grid-template-columns:repeat(2,1fr);gap:0;
  border-top:1px solid rgba(255,255,255,0.12);
}
.pledge{
  padding:28px 24px 28px 0;
  border-bottom:1px solid rgba(255,255,255,0.12);
  display:flex;gap:18px;align-items:flex-start;
}
.pledge:nth-child(odd){padding-right:32px;border-right:1px solid rgba(255,255,255,0.12)}
.pledge:nth-child(even){padding-left:32px}
.pledge-check{
  flex-shrink:0;width:32px;height:32px;border-radius:50%;
  background:var(--gold);color:var(--ink);
  display:grid;place-items:center;font-weight:700;font-size:16px;
}
.pledge-text h4{
  font-family:var(--font-display);font-size:19px;font-weight:500;
  color:var(--cream);margin-bottom:6px;
}
.pledge-text p{color:rgba(250,247,242,0.7);font-size:14px;line-height:1.5}

@media (max-width:780px){
  .rgpd{padding:48px 24px}
  .pledges{grid-template-columns:1fr}
  .pledge:nth-child(odd){padding-right:0;border-right:none}
  .pledge:nth-child(even){padding-left:0}
  .pledge{padding:22px 0}
}

/* ══════════════════════════
   FAQ
   ══════════════════════════ */
.faq{max-width:760px;margin:0 auto}
.faq-item{
  border-bottom:1px solid var(--line);
  padding:24px 0;
}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:24px;
  font-family:var(--font-display);font-size:20px;font-weight:500;
  color:var(--ink);letter-spacing:-0.01em;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';font-size:28px;font-weight:300;color:var(--ink-dim);
  transition:transform .2s;
}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--indigo)}
.faq-item p{
  color:var(--ink-soft);font-size:16px;line-height:1.6;margin-top:14px;
}

/* ══════════════════════════
   CTA band
   ══════════════════════════ */
.cta-band{
  background:var(--indigo);color:white;
  border-radius:var(--radius-lg);
  padding:80px 48px;text-align:center;
  position:relative;overflow:hidden;
  margin:40px 0;
}
.cta-band::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 20% 30%,rgba(255,255,255,0.08) 0,transparent 40%),
             radial-gradient(circle at 80% 70%,rgba(232,85,43,0.15) 0,transparent 40%);
}
.cta-band-inner{position:relative;z-index:1}
.cta-band h2{
  font-family:var(--font-display);
  font-size:clamp(32px,5vw,52px);
  font-weight:400;line-height:1.1;margin-bottom:18px;letter-spacing:-0.02em;
}
.cta-band h2 em{font-style:italic}
.cta-band p{color:rgba(255,255,255,0.8);font-size:17px;margin-bottom:32px;max-width:520px;margin-left:auto;margin-right:auto}
.cta-band .btn-primary{background:white;color:var(--indigo-dark)}
.cta-band .btn-primary:hover{background:var(--gold);color:var(--ink)}
.cta-band .btn-ghost{color:white;border-color:rgba(255,255,255,0.3)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,0.1);border-color:white}

@media (max-width:780px){
  .cta-band{padding:56px 24px}
}

/* ══════════════════════════
   FOOTER
   ══════════════════════════ */
.footer{
  border-top:1px solid var(--line);
  padding:48px 28px 36px;
  max-width:var(--max);margin:0 auto;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;
  margin-bottom:36px;
}
.footer-brand{
  font-family:var(--font-display);font-size:28px;font-weight:500;
  letter-spacing:-0.02em;margin-bottom:12px;
}
.footer-brand-sub{color:var(--ink-dim);font-size:14px;max-width:320px;line-height:1.5}
.footer h5{
  font-family:var(--font-mono);font-size:12px;text-transform:uppercase;
  letter-spacing:0.12em;color:var(--ink-dim);margin-bottom:16px;
}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul a{color:var(--ink-soft);text-decoration:none;font-size:14px;transition:color .15s}
.footer ul a:hover{color:var(--ink)}
.footer-bottom{
  border-top:1px solid var(--line);padding-top:24px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;
  color:var(--ink-dim);font-size:13px;
}

@media (max-width:780px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
}

/* ══════════════════════════
   Scroll reveal
   ══════════════════════════ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}