/* Kéfa AI : sections sombres (nuit indigo, aurore violet et cyan) alternées avec des sections claires, comme la vidéo de lancement */
:root{
  --night:#0b0820;
  --indigo:#1a1250;
  --violet:#7c6cff;
  --violet-2:#a98bff;
  --cyan:#5fd8f0;
  --gold:#f5c26b;
  --ink:#14112b;
  --ink-soft:#585673;
  --paper:#ffffff;
  --mist:#f4f3fb;
  --line-l:#e6e4f2;
  --line-d:rgba(190,180,255,.16);
  --text-d:#eeecff;
  --dim-d:#a6a3c9;
  --grad:linear-gradient(100deg,var(--cyan),var(--violet-2) 60%,var(--violet));
  --head:"Poppins",system-ui,sans-serif;
  --body:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:22px;
  --s1:4px;--s2:8px;--s3:16px;--s4:24px;--s5:32px;--s6:48px;--s7:64px;--s8:96px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.65;overflow-x:hidden}
img,video,svg{display:block;max-width:100%}
svg{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
h1,h2,h3{font-family:var(--head);margin:0;line-height:1.15;text-wrap:balance}
h1{font-size:clamp(2.1rem,5.6vw,3.9rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.65rem,3.6vw,2.6rem);font-weight:700;letter-spacing:-.015em;max-width:22em}
h3{font-size:1.15rem;font-weight:600}
p{margin:0}
a{color:inherit}
.wrap{max-width:1160px;margin:0 auto;padding-inline:max(16px,env(safe-area-inset-left,0px)) max(16px,env(safe-area-inset-right,0px));position:relative;z-index:1}
@media (min-width:700px){.wrap{padding-inline:32px}}
.narrow{max-width:820px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;color:#000;padding:8px 12px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

/* sections */
.sec{padding-block:clamp(64px,10vw,120px)}
.dark{background:radial-gradient(70rem 40rem at 90% -10%,rgba(124,108,255,.35),transparent 60%),radial-gradient(50rem 30rem at -10% 110%,rgba(95,216,240,.14),transparent 60%),linear-gradient(180deg,var(--indigo),var(--night));color:var(--text-d);position:relative;overflow:hidden}
.light{background:var(--paper)}
.soft{background:var(--mist)}
.label{font-family:var(--head);font-size:.78rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--violet);margin-bottom:var(--s3)}
.dark .label{color:var(--cyan)}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.intro{color:var(--dim-d);max-width:40em;margin-top:var(--s4);font-size:1.1rem}

/* étoiles */
.stars{position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:radial-gradient(1.2px 1.2px at 12% 18%,#fff,transparent),radial-gradient(1px 1px at 28% 62%,#fff,transparent),radial-gradient(1.4px 1.4px at 44% 30%,#cfd8ff,transparent),radial-gradient(1px 1px at 63% 78%,#fff,transparent),radial-gradient(1.3px 1.3px at 78% 22%,#fff,transparent),radial-gradient(1px 1px at 90% 58%,#cfe9ff,transparent),radial-gradient(1px 1px at 6% 82%,#fff,transparent),radial-gradient(1.2px 1.2px at 52% 92%,#fff,transparent);
  background-size:520px 520px}

/* boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:12px 24px;border-radius:999px;border:0;cursor:pointer;
  font-family:var(--head);font-weight:600;font-size:1rem;text-decoration:none;color:#fff;background:linear-gradient(100deg,#25d366,#1fb85a);
  box-shadow:0 10px 30px -10px rgba(37,211,102,.6),inset 0 0 0 1px rgba(255,255,255,.18);transition:transform .2s ease,box-shadow .2s ease}
.btn svg{width:20px;height:20px;flex:none}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 40px -12px rgba(37,211,102,.75),inset 0 0 0 1px rgba(255,255,255,.25)}
.btn:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.06);color:var(--text-d);box-shadow:inset 0 0 0 1px var(--line-d)}
.btn-ghost:hover{background:rgba(255,255,255,.12);box-shadow:inset 0 0 0 1px rgba(190,180,255,.4)}
.btn-sm{min-height:40px;padding:8px 18px;font-size:.92rem}
.btn-lg{min-height:58px;padding:16px 32px;font-size:1.08rem}

/* en-tête */
.top{position:fixed;inset:0 0 auto;z-index:50;transition:background .3s,box-shadow .3s,backdrop-filter .3s}
.top.scrolled{background:rgba(11,8,32,.78);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line-d)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:var(--s3);height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;font-family:var(--head);font-weight:700;font-size:1.2rem}
.brand img{width:40px;height:40px;border-radius:11px;box-shadow:0 0 0 1px rgba(255,255,255,.12),0 6px 20px -6px rgba(124,108,255,.8)}
.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav{display:flex;gap:28px}
.nav a{color:var(--dim-d);text-decoration:none;font-size:.95rem;font-weight:500;transition:color .2s}
.nav a:hover{color:#fff}
@media (max-width:860px){.nav{display:none}}
@media (max-width:400px){.top .btn-sm span{display:none}.top .btn-sm{padding:8px 12px}}

/* hero */
.hero{padding-top:clamp(112px,16vw,160px);padding-bottom:clamp(64px,9vw,110px)}
.hero-in{display:grid;grid-template-columns:1.25fr .75fr;gap:var(--s6);align-items:center}
.hero-in>*{min-width:0}
.kicker{font-family:var(--head);font-weight:600;font-size:.82rem;letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);margin-bottom:var(--s4)}
.kicker i,.foot i{font-style:normal;opacity:.45;margin-inline:.35em}
.lead{color:var(--dim-d);font-size:clamp(1.05rem,1.6vw,1.2rem);margin-top:var(--s4);max-width:34em}
.ctas{display:flex;flex-wrap:wrap;gap:var(--s3);margin-top:var(--s5)}
.facts{list-style:none;padding:0;margin:var(--s6) 0 0;display:flex;flex-wrap:wrap;gap:var(--s5)}
.facts li{display:flex;flex-direction:column;padding-left:14px;border-left:2px solid rgba(95,216,240,.5)}
.facts b{font-family:var(--head);font-weight:600;color:#fff}
.facts span{font-size:.9rem;color:var(--dim-d)}

.hero-vis{position:relative;display:grid;place-items:center;min-height:540px}
.glow{position:absolute;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(169,139,255,.55),rgba(95,216,240,.18) 45%,transparent 70%);filter:blur(10px)}
.ring{position:absolute;width:460px;height:460px;border-radius:50%;border:2px solid rgba(95,216,240,.35);
  -webkit-mask:conic-gradient(#000 0 70%,transparent 70% 76%,#000 76% 92%,transparent 92%);mask:conic-gradient(#000 0 70%,transparent 70% 76%,#000 76% 92%,transparent 92%)}
.phone{margin:0;border-radius:38px;padding:9px;background:linear-gradient(145deg,#3a3560,#121027 40%,#26224a);
  box-shadow:0 0 0 1px rgba(255,255,255,.12),0 40px 80px -30px rgba(0,0,0,.7),0 0 60px -20px rgba(124,108,255,.6)}
.phone img{border-radius:30px;width:100%;height:auto}
.phone-main{width:min(270px,62vw);position:relative;z-index:2}
.chip{position:absolute;z-index:3;display:flex;align-items:center;gap:8px;padding:10px 16px;border-radius:999px;font-family:var(--head);font-weight:600;font-size:.88rem;white-space:nowrap;
  color:#fff;background:rgba(40,30,100,.72);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:inset 0 0 0 1px rgba(190,180,255,.35),0 14px 30px -12px rgba(0,0,0,.6)}
.chip svg{width:18px;height:18px;color:var(--cyan)}
.chip-1{top:20%;left:-9%}
.chip-2{top:50%;right:-9%}
.chip-3{bottom:12%;left:-6%}

/* services */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s4);margin-top:var(--s6)}
.card{display:flex;flex-direction:column;gap:12px;padding:28px;border-radius:var(--r);background:var(--paper);border:1px solid var(--line-l);
  box-shadow:0 1px 2px rgba(20,17,43,.04);transition:transform .25s ease,box-shadow .25s ease,border-color .25s}
.card:hover{transform:translateY(-4px);border-color:#d6d1f5;box-shadow:0 24px 50px -24px rgba(80,60,200,.35)}
.card p{color:var(--ink-soft);font-size:.98rem}
.ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;color:#fff;background:linear-gradient(140deg,var(--violet),var(--cyan));box-shadow:0 10px 24px -10px rgba(124,108,255,.8)}
.ico svg{width:24px;height:24px}
.more{margin-top:auto;padding-top:8px;font-weight:600;color:var(--violet);text-decoration:none}
.more::after{content:" \2192"}
.more:hover{text-decoration:underline}
.plus{margin-top:var(--s5);color:var(--ink-soft)}
.plus a{color:var(--violet);font-weight:600}

/* kéfa */
.kefa-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s6);margin-top:var(--s6);align-items:center}
.kefa-grid>*{min-width:0}
.tasks{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:var(--s3)}
.tasks li{display:flex;flex-direction:column;gap:4px;padding:20px;border-radius:18px;background:rgba(255,255,255,.04);border:1px solid var(--line-d);min-width:0}
.tasks .q{font-size:.86rem;color:var(--cyan);font-weight:500}
.tasks b{font-family:var(--head);font-weight:600;color:#fff}
.tasks span:last-child{color:var(--dim-d);font-size:.92rem}
.screens{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s3);align-items:center}
.screens .phone{border-radius:26px;padding:6px}
.screens .phone img{border-radius:21px}
.phone-up{transform:translateY(-28px)}
.note{margin-top:var(--s5);font-size:.85rem;color:var(--dim-d);opacity:.8}

/* vidéo */
.video-in{display:grid;grid-template-columns:1fr auto;gap:var(--s7);align-items:center}
.video-txt{display:flex;flex-direction:column;gap:var(--s4);align-items:flex-start}
.video-txt p:not(.label){color:var(--ink-soft);font-size:1.1rem;max-width:30em}
.video-box{width:min(340px,100%);border-radius:28px;overflow:hidden;background:var(--night);box-shadow:0 40px 80px -30px rgba(40,20,140,.55),0 0 0 1px var(--line-l)}
.video-box video{width:100%;height:auto;aspect-ratio:9/16;background:var(--night)}

/* étapes */
.steps{list-style:none;margin:var(--s6) 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s4);counter-reset:s;position:relative}
.steps::before{content:"";position:absolute;left:24px;right:24px;top:24px;height:2px;background:linear-gradient(90deg,var(--cyan),var(--violet))}
.steps li{counter-increment:s;position:relative;display:flex;flex-direction:column;gap:10px;min-width:0}
.steps li::before{content:counter(s,decimal-leading-zero);position:relative;width:50px;height:50px;border-radius:50%;display:grid;place-items:center;margin-bottom:8px;
  font-family:var(--head);font-weight:700;color:#fff;background:linear-gradient(140deg,var(--violet),var(--cyan));box-shadow:0 0 0 6px var(--mist),0 10px 24px -8px rgba(124,108,255,.7)}
.steps p{color:var(--ink-soft);font-size:.97rem}

/* confiance */
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s4);margin-top:var(--s6)}
.trust>div{padding:28px;border-radius:var(--r);background:rgba(255,255,255,.04);border:1px solid var(--line-d);display:flex;flex-direction:column;gap:10px}
.trust svg{width:30px;height:30px;color:var(--gold)}
.trust h3{color:#fff}
.trust p{color:var(--dim-d);font-size:.97rem}

/* questions */
.faq{margin-top:var(--s5);display:flex;flex-direction:column;gap:12px}
.faq details{border:1px solid var(--line-l);border-radius:16px;background:var(--paper);transition:border-color .2s,box-shadow .2s}
.faq details[open]{border-color:#d6d1f5;box-shadow:0 18px 40px -26px rgba(80,60,200,.4)}
.faq summary{cursor:pointer;list-style:none;padding:20px 56px 20px 22px;font-family:var(--head);font-weight:600;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:22px;top:50%;width:10px;height:10px;border-right:2px solid var(--violet);border-bottom:2px solid var(--violet);transform:translateY(-70%) rotate(45deg);transition:transform .25s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details p{padding:0 22px 20px;color:var(--ink-soft)}

/* contact */
.cta-box{text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--s4);max-width:760px;margin:0 auto}
.cta-logo{width:96px;height:96px;border-radius:26px;box-shadow:0 0 0 1px rgba(255,255,255,.14),0 0 70px -10px rgba(124,108,255,.9)}
.cta-box p{color:var(--dim-d);font-size:1.12rem}
.links{list-style:none;padding:0;margin:var(--s3) 0 0;display:flex;flex-wrap:wrap;justify-content:center;gap:12px var(--s5)}
.links a{display:inline-flex;align-items:center;gap:8px;color:var(--text-d);text-decoration:none;font-weight:500;padding:8px 4px;overflow-wrap:anywhere}
.links a:hover{color:var(--cyan)}
.links svg{width:20px;height:20px;color:var(--cyan);flex:none}

/* pied */
.foot{background:var(--night);color:var(--dim-d);font-size:.88rem;border-top:1px solid var(--line-d)}
.foot-in{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-block:28px}

/* responsive */
@media (max-width:1020px){
  .cards{grid-template-columns:1fr 1fr}
  .kefa-grid{grid-template-columns:1fr}
  .screens{max-width:560px;margin-inline:auto;width:100%}
}
@media (max-width:860px){
  .hero-in{grid-template-columns:1fr}
  .hero-vis{min-height:480px}
  .video-in{grid-template-columns:1fr;gap:var(--s6)}
  .video-box{margin-inline:auto}
  .steps{grid-template-columns:1fr 1fr;row-gap:var(--s6)}
  .steps::before{display:none}
  .trust{grid-template-columns:1fr}
}
@media (max-width:560px){
  .cards,.tasks{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .ctas .btn{width:100%}
  .facts{gap:var(--s4)}
  .glow{width:300px;height:300px}
  .ring{width:330px;height:330px}
  .hero-vis{min-height:430px}
  .chip{font-size:.78rem;padding:8px 12px}
  .chip-1{left:0}.chip-2{right:0}.chip-3{left:2%}
  .phone-up{transform:translateY(-14px)}
}

/* animations : seulement si l'utilisateur ne demande pas moins de mouvement */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
  .js .reveal.in{opacity:1;transform:none}
  .js .phone-up.reveal.in{transform:translateY(-28px)}
  .float{animation:float 6s ease-in-out infinite}
  .float-slow{animation:float 7s ease-in-out infinite}
  .d2{animation-delay:-2.3s}.d3{animation-delay:-4.6s}
  .glow{animation:breathe 5s ease-in-out infinite}
  .ring{animation:spin 40s linear infinite}
  @keyframes float{50%{transform:translateY(-12px)}}
  @keyframes breathe{50%{opacity:.7;transform:scale(1.06)}}
  @keyframes spin{to{transform:rotate(360deg)}}
}
@media (prefers-reduced-motion:no-preference) and (max-width:560px){
  .js .phone-up.reveal.in{transform:translateY(-14px)}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}