/* ===== M&K Agency IA — Black & Gold edition ===== */
:root{
  --bg:#0a0a0c;
  --bg-2:#0d0d10;
  --surface:#131317;
  --surface-2:#1a1a20;
  --line:rgba(214,178,94,.16);
  --line-strong:rgba(214,178,94,.34);
  --text:#f4efe4;
  --muted:#a39d8e;
  --gold:#d6b25e;
  --gold-lite:#f3dca0;
  --gold-deep:#a87c2e;
  --grad:linear-gradient(120deg,#f6e3ad 0%,#d6b25e 45%,#a87c2e 100%);
  --grad-soft:linear-gradient(120deg,rgba(243,220,160,.16),rgba(168,124,46,.10));
  --radius:18px;
  --maxw:1180px;
  --shadow:0 24px 70px rgba(0,0,0,.55);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:'Playfair Display',Georgia,serif;line-height:1.1;letter-spacing:-.01em;font-weight:700}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:rgba(214,178,94,.28);color:#fff}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ===== Background ===== */
.bg-grid{
  position:fixed;inset:0;z-index:-2;
  background-image:
    linear-gradient(rgba(214,178,94,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(214,178,94,.045) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(ellipse 85% 60% at 50% 0%,#000 35%,transparent 100%);
}
.bg-glow{
  position:fixed;top:-12%;left:50%;transform:translateX(-50%);
  width:1000px;height:640px;z-index:-1;pointer-events:none;
  background:radial-gradient(circle at 50% 30%,rgba(214,178,94,.18),transparent 62%);
  filter:blur(50px);
}

/* ===== Header ===== */
#header{
  position:sticky;top:0;z-index:100;
  backdrop-filter:blur(16px);
  background:rgba(10,10,12,.65);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s;
}
#header.scrolled{border-color:var(--line);background:rgba(10,10,12,.9)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:84px}
.logo{display:flex;align-items:center}
.logo .logo-img{height:44px;width:auto;display:block;filter:drop-shadow(0 2px 12px rgba(0,0,0,.5))}

#nav{display:flex;align-items:center;gap:34px}
#nav a{font-size:.92rem;color:var(--muted);font-weight:500;letter-spacing:.01em;transition:color .25s;position:relative}
#nav a:not(.nav-cta):hover{color:var(--text)}
#nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--grad);transition:width .3s}
#nav a:not(.nav-cta):hover::after{width:100%}
.nav-cta{
  padding:11px 22px;border-radius:999px;color:#0a0a0c !important;font-weight:600;
  background:var(--grad);box-shadow:0 8px 24px rgba(214,178,94,.28);transition:transform .25s,box-shadow .25s;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(214,178,94,.4)}

#burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
#burger span{width:24px;height:2px;background:var(--gold);border-radius:2px;transition:.3s}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:15px 30px;border-radius:999px;font-weight:600;font-size:.98rem;
  font-family:inherit;cursor:pointer;border:1px solid transparent;transition:transform .25s,box-shadow .25s,border-color .25s,color .25s,background .25s;
}
.btn-primary{background:var(--grad);color:#0a0a0c;box-shadow:0 10px 30px rgba(214,178,94,.3)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(214,178,94,.45)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-lite);background:rgba(214,178,94,.06)}
.btn-block{width:100%}

/* ===== Hero ===== */
.hero{padding:70px 0 80px;text-align:center}
.hero-inner{display:flex;flex-direction:column;align-items:center}
.hero-logo{width:min(540px,84%);height:auto;margin:0 auto 30px;filter:drop-shadow(0 12px 40px rgba(0,0,0,.6))}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.74rem;letter-spacing:.28em;text-transform:uppercase;color:var(--gold);
  border:1px solid var(--line);padding:8px 18px;border-radius:999px;background:var(--grad-soft);margin-bottom:26px;
}
.hero h1{font-size:clamp(2.5rem,6vw,4.5rem);margin-bottom:22px}
.lead{max-width:680px;color:var(--muted);font-size:1.12rem;margin:0 auto 36px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}

/* ===== Sections ===== */
.section{padding:110px 0}
.section-alt{background:linear-gradient(180deg,rgba(19,19,23,.5),transparent)}
.section-head{text-align:center;max-width:720px;margin:0 auto 64px}
.kicker{
  display:inline-flex;align-items:center;gap:10px;font-size:.74rem;letter-spacing:.26em;text-transform:uppercase;color:var(--gold);margin-bottom:18px;
}
.kicker::before,.kicker::after{content:"";width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--gold))}
.kicker::after{background:linear-gradient(90deg,var(--gold),transparent)}
.section-head h2{font-size:clamp(2rem,4vw,3rem)}
.section-sub{color:var(--muted);margin-top:16px;font-size:1.05rem}

/* ===== Cards ===== */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.card{
  position:relative;background:linear-gradient(180deg,var(--surface),var(--bg-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;
  transition:transform .35s,border-color .35s,box-shadow .35s;overflow:hidden;
}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .4s}
.card:hover{transform:translateY(-6px);border-color:var(--line-strong);box-shadow:0 26px 60px rgba(0,0,0,.5)}
.card:hover::before{transform:scaleX(1)}
.card-ico{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:var(--grad-soft);border:1px solid var(--line);margin-bottom:22px;color:var(--gold-lite);
}
.card-ico svg{width:26px;height:26px;stroke:currentColor;fill:none;stroke-width:1.6}
.card h3{font-size:1.4rem;margin-bottom:12px}
.card p{color:var(--muted);font-size:.95rem;margin-bottom:18px}
.card ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.card li{position:relative;padding-left:22px;font-size:.9rem;color:var(--text)}
.card li::before{content:"";position:absolute;left:0;top:.55em;width:7px;height:7px;transform:rotate(45deg);background:var(--grad)}

/* ===== Réalisations ===== */
.work-card{
  display:grid;grid-template-columns:auto 1fr;gap:36px;align-items:center;
  max-width:920px;margin:0 auto;padding:44px 46px;border:1px solid var(--line-strong);
  border-radius:24px;background:linear-gradient(160deg,var(--surface-2),var(--bg-2));
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.work-card::before{content:"";position:absolute;top:-80px;left:-80px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(214,178,94,.35),transparent 70%);filter:blur(24px)}
.work-index{font-family:'Playfair Display',serif;font-size:clamp(3.5rem,9vw,6rem);line-height:.8;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;position:relative}
.work-body{position:relative}
.work-body h3{font-size:1.7rem;margin-bottom:12px}
.work-body p{color:var(--muted);margin-bottom:20px}
.work-body strong{color:var(--gold-lite);font-weight:600}
.work-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.work-tags span{font-size:.76rem;letter-spacing:.04em;color:var(--gold-lite);border:1px solid var(--line);background:var(--grad-soft);padding:6px 14px;border-radius:999px}
@media(max-width:680px){.work-card{grid-template-columns:1fr;gap:12px;padding:34px 26px;text-align:center}.work-tags{justify-content:center}}

/* ===== Process steps ===== */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:26px}
.step{position:relative;padding:30px 26px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,var(--surface),var(--bg-2));transition:border-color .3s,transform .3s}
.step:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.step-num{font-family:'Playfair Display',serif;font-size:2.6rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:block;margin-bottom:10px}
.step h3{font-size:1.25rem;margin-bottom:10px}
.step p{color:var(--muted);font-size:.92rem}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.about-text h2{font-size:clamp(1.8rem,3.4vw,2.6rem);margin-bottom:20px}
.about-text p{color:var(--muted);margin-bottom:16px}
.about-text strong{color:var(--gold-lite);font-weight:600}
.values{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:30px}
.value{padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:rgba(19,19,23,.5)}
.value strong{display:block;color:var(--gold-lite);font-family:'Playfair Display',serif;font-size:1.1rem;margin-bottom:4px}
.value span{color:var(--muted);font-size:.86rem}
.about-card{
  position:relative;padding:48px 40px;border:1px solid var(--line-strong);border-radius:24px;
  background:linear-gradient(160deg,var(--surface-2),var(--bg-2));overflow:hidden;box-shadow:var(--shadow);
}
.about-card .orb{position:absolute;top:-60px;right:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(214,178,94,.4),transparent 70%);filter:blur(20px)}
.about-card blockquote{position:relative;font-family:'Playfair Display',serif;font-size:1.4rem;line-height:1.5;color:var(--text);font-style:italic}
.about-card blockquote::before{content:"“";position:absolute;top:-40px;left:-10px;font-family:'Playfair Display',serif;font-size:5rem;color:var(--gold);opacity:.4}
.about-card cite{display:block;margin-top:22px;color:var(--gold);font-style:normal;font-size:.9rem;letter-spacing:.04em}

/* ===== Footer ===== */
#footer{border-top:1px solid var(--line);background:var(--bg-2);padding:64px 0 30px}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-logo{height:58px;width:auto;margin-bottom:16px;filter:drop-shadow(0 6px 20px rgba(0,0,0,.5))}
.footer-brand p{color:var(--muted);font-size:.9rem;max-width:280px}
.footer-col h4{font-family:'Playfair Display',serif;font-size:1.05rem;color:var(--gold-lite);margin-bottom:16px}
.footer-col a{display:block;color:var(--muted);font-size:.9rem;margin-bottom:10px;transition:color .2s,padding-left .2s}
.footer-col a:hover{color:var(--gold-lite);padding-left:4px}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line);color:#6f6a5e;font-size:.82rem}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== Chat widget (KAI) ===== */
.chat-toggle{position:fixed;bottom:24px;right:24px;width:62px;height:62px;border:none;border-radius:50%;background:var(--grad);color:#0a0a0c;cursor:pointer;z-index:1000;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 34px rgba(214,178,94,.42);transition:transform .25s,box-shadow .25s}
.chat-toggle:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 16px 42px rgba(214,178,94,.55)}
.chat-toggle svg{width:26px;height:26px}
.chat-toggle.hidden{display:none}

.chat-box{position:fixed;bottom:24px;right:24px;width:374px;max-width:calc(100vw - 32px);height:560px;max-height:calc(100vh - 48px);background:var(--surface);border:1px solid var(--line-strong);border-radius:20px;display:none;flex-direction:column;z-index:1001;overflow:hidden;box-shadow:0 26px 70px rgba(0,0,0,.65);animation:chatIn .3s ease}
.chat-box.open{display:flex}
@keyframes chatIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}

.chat-head{display:flex;align-items:center;justify-content:space-between;padding:15px 17px;background:var(--grad-soft);border-bottom:1px solid var(--line)}
.chat-id{display:flex;align-items:center;gap:12px}
.chat-avatar{width:42px;height:42px;border-radius:12px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-family:'Playfair Display',serif;font-weight:700;font-size:.82rem;color:#0a0a0c;flex-shrink:0}
.chat-id strong{display:block;font-family:'Playfair Display',serif;font-size:1rem;color:var(--text)}
.chat-status{display:flex;align-items:center;gap:6px;font-size:.72rem;color:var(--muted)}
.chat-status i{width:7px;height:7px;border-radius:50%;background:#43d18a;display:inline-block;animation:chatPulse 2s infinite}
@keyframes chatPulse{0%{box-shadow:0 0 0 0 rgba(67,209,138,.6)}70%{box-shadow:0 0 0 8px rgba(67,209,138,0)}100%{box-shadow:0 0 0 0 rgba(67,209,138,0)}}
.chat-close{background:none;border:none;color:var(--muted);font-size:1.6rem;line-height:1;cursor:pointer;padding:0 4px}
.chat-close:hover{color:var(--gold-lite)}

.chat-msgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:85%;padding:11px 15px;border-radius:14px;font-size:.88rem;line-height:1.5;word-wrap:break-word;white-space:pre-wrap}
.msg.bot{align-self:flex-start;background:var(--surface-2);border:1px solid var(--line);border-bottom-left-radius:4px;color:var(--text)}
.msg.user{align-self:flex-end;background:var(--grad);color:#0a0a0c;font-weight:500;border-bottom-right-radius:4px}
.msg.typing{color:var(--muted);font-style:italic}
.msg.err{align-self:flex-start;background:rgba(255,120,90,.12);border:1px solid rgba(255,120,90,.3);color:#ff9b8a}
.msg strong{color:var(--gold-lite)}
.msg.user strong{color:#0a0a0c}

.chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:var(--bg-2)}
.chat-form input{flex:1;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:11px 15px;color:var(--text);font-family:inherit;font-size:.88rem;outline:none}
.chat-form input:focus{border-color:var(--gold)}
.chat-form button{width:46px;border:none;border-radius:12px;background:var(--grad);color:#0a0a0c;font-size:1rem;cursor:pointer;flex-shrink:0}
.chat-form button:hover{opacity:.9}

/* ===== Responsive ===== */
@media(max-width:880px){
  .about-grid{grid-template-columns:1fr;gap:36px}
  .footer-inner{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:680px){
  #nav{position:fixed;top:84px;left:0;right:0;flex-direction:column;gap:0;background:rgba(10,10,12,.97);border-bottom:1px solid var(--line);padding:10px 24px 22px;transform:translateY(-130%);transition:transform .35s;align-items:stretch}
  #nav.open{transform:none}
  #nav a{padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-cta{text-align:center;margin-top:12px}
  #burger{display:flex}
  .hero-logo{width:90%;margin-bottom:22px}
  .hero-stats{gap:32px}
  .values{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .logo .logo-img{height:38px}
}

/* ===== Bulle d'accroche + boutons rapides ===== */
.chat-teaser{
  position:fixed;bottom:96px;right:24px;z-index:1000;max-width:230px;
  background:var(--surface);border:1px solid var(--line-strong);color:var(--text);
  padding:13px 32px 13px 16px;border-radius:14px 14px 4px 14px;font-size:.86rem;line-height:1.4;
  box-shadow:0 14px 40px rgba(0,0,0,.55);cursor:pointer;opacity:0;transform:translateY(10px);
  pointer-events:none;transition:opacity .4s,transform .4s;
}
.chat-teaser.show{opacity:1;transform:none;pointer-events:auto}
.chat-teaser-close{position:absolute;top:6px;right:8px;background:none;border:0;color:var(--muted);font-size:1.1rem;line-height:1;cursor:pointer}
.chat-teaser-close:hover{color:var(--gold-lite)}

.chat-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.chat-chip{
  font-family:inherit;font-size:.8rem;color:var(--gold-lite);cursor:pointer;
  background:var(--grad-soft);border:1px solid var(--line);border-radius:999px;padding:7px 14px;
  transition:border-color .2s,background .2s,transform .15s;
}
.chat-chip:hover{border-color:var(--gold);transform:translateY(-1px)}
@media(max-width:680px){.chat-teaser{display:none}}