/* KAIRN — site vitrine. Bandeaux "minéral profond" alternés avec des fonds clairs, cartes blanches nettes, chiffres tabulaires. */
:root{
  --ink:#103240;        /* Minéral profond (charte) */
  --ink-deep:#0a2330;
  --mist:#7091a6;       /* Brume atlantique (charte) */
  --mist-dark:#4d7186;
  --mist-soft:#e3ebf0;
  --paper:#f4f7f9;
  --white:#ffffff;
  --text:#14262f;
  --muted:#556b77;
  --line:#d5e0e7;
  --ok:#2f7a5b;
  --font-display:"Montserrat","Helvetica Neue",Arial,sans-serif;
  --font-body:"Manrope","Helvetica Neue",Arial,sans-serif;
  --radius:10px;
  --shadow:0 1px 2px rgba(16,50,64,.06),0 12px 32px -12px rgba(16,50,64,.18);
  --max:1180px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--paper);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--mist);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--max);margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.num{font-variant-numeric:tabular-nums}

/* Typo */
h1,h2,h3,.display{font-family:var(--font-display);text-wrap:balance;margin:0}
h1{font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.08;font-weight:800;letter-spacing:.01em;text-transform:uppercase}
h2{font-size:clamp(1.55rem,3vw,2.3rem);line-height:1.15;font-weight:800;text-transform:uppercase;letter-spacing:.015em}
h3{font-size:1.08rem;line-height:1.3;font-weight:700}
p{margin:0}
.lead{font-size:1.12rem;color:var(--muted);max-width:62ch}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:.72rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--mist-dark)}
.eyebrow::before{content:"";width:18px;height:2px;background:currentColor}
.u{text-decoration:underline;text-decoration-color:var(--mist);text-decoration-thickness:3px;text-underline-offset:6px}
.dark .eyebrow{color:#a9c1cf}
.dark .lead{color:#c3d3dc}

/* Header */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--ink-deep)}
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:rgba(10,35,48,.96);backdrop-filter:blur(8px);color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:#fff}
.brand svg{width:38px;height:42px;flex:none}
.brand svg.logo{width:176px;height:auto;display:block}
.site-footer .brand{color:#fff}.site-footer .brand svg.logo{width:220px}
@media (max-width:420px){.brand svg.logo{width:156px}}
.brand-name{font-family:var(--font-display);font-weight:700;letter-spacing:.32em;font-size:1.15rem;line-height:1}
.brand-tag{display:block;font-size:.55rem;letter-spacing:.2em;font-weight:600;color:#a9c1cf;margin-top:5px}
.menu{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.menu a,.menu button{font:600 .82rem var(--font-body);letter-spacing:.04em;color:#dbe6ec;text-decoration:none;padding:10px 12px;border-radius:6px;background:none;border:0;cursor:pointer}
.menu a:hover,.menu button:hover,.menu a[aria-current="page"]{color:#fff;background:rgba(255,255,255,.07)}
.has-sub{position:relative}
.sub{position:absolute;top:calc(100% + 6px);left:-8px;min-width:290px;background:#fff;color:var(--text);border-radius:var(--radius);box-shadow:var(--shadow);padding:8px;list-style:none;margin:0;display:none}
.has-sub:hover .sub,.has-sub:focus-within .sub,.has-sub.open .sub{display:block}
.sub a{display:block;color:var(--text);padding:10px 12px}
.sub a small{display:block;color:var(--muted);font-weight:500;letter-spacing:0;font-size:.78rem}
.sub a:hover{background:var(--paper);color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-phone{font:700 .9rem var(--font-body);color:#fff;text-decoration:none;white-space:nowrap}
.burger{display:none;background:none;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:8px;width:44px;height:44px;cursor:pointer}
@media (max-width:1020px){
  .menu{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--ink-deep);padding:12px max(20px,env(safe-area-inset-right,0px)) 20px max(20px,env(safe-area-inset-left,0px));border-bottom:1px solid rgba(255,255,255,.1)}
  .menu.open{display:flex}
  .sub{position:static;display:block;box-shadow:none;background:transparent;padding:0 0 0 12px;min-width:0}
  .sub a{color:#dbe6ec}.sub a small{color:#93aebd}.sub a:hover{background:rgba(255,255,255,.06);color:#fff}
  .burger{display:inline-grid;place-items:center}
  .nav-phone{display:none}
}
@media (max-width:520px){.nav-cta .btn{display:none}}

/* Boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font:700 .9rem var(--font-body);letter-spacing:.02em;padding:14px 22px;border-radius:8px;text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:transform .15s,background .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--ink-deep);box-shadow:0 8px 20px -8px rgba(16,50,64,.6)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{box-shadow:0 8px 24px -8px rgba(0,0,0,.5)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;background:transparent}
.btn-ghost:hover{border-color:#fff}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-sm{padding:10px 16px;font-size:.82rem}
.btn .arrow{transition:transform .15s}.btn:hover .arrow{transform:translateX(3px)}

/* Sections */
.section{padding-block:clamp(56px,8vw,104px)}
.section-head{display:grid;gap:14px;margin-bottom:40px;max-width:760px}
.dark{background:radial-gradient(1200px 500px at 85% -10%,rgba(112,145,166,.28),transparent 60%),linear-gradient(160deg,var(--ink) 0%,var(--ink-deep) 100%);color:#fff;position:relative;overflow:hidden}
.dark .hexwatermark{position:absolute;right:-120px;top:-60px;width:520px;opacity:.06;pointer-events:none}
.white{background:var(--white)}

/* Hero */
.hero{padding-block:clamp(48px,7vw,88px) clamp(56px,8vw,96px)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,5vw,64px);align-items:center;position:relative}
.hero-grid>*{min-width:0}
.hero h1 em{font-style:normal;color:#a9c1cf}
.hero .lead{margin-top:20px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;font-size:.85rem;color:#c3d3dc}
.trust span{display:inline-flex;align-items:center;gap:8px}
.trust svg{width:16px;height:16px;flex:none;color:#a9c1cf}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}
.page-hero{padding-block:clamp(44px,6vw,76px)}
.page-hero .wrap{position:relative}
.crumbs{font-size:.8rem;color:#a9c1cf;margin-bottom:18px}
.crumbs a{color:#c3d3dc;text-decoration:none}.crumbs a:hover{text-decoration:underline}

/* Chiffres */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat{background:#fff;padding:26px 22px}
.stat b{display:block;font:800 clamp(1.7rem,3vw,2.3rem)/1 var(--font-display);color:var(--ink);font-variant-numeric:tabular-nums}
.stat span{display:block;margin-top:8px;font-size:.82rem;color:var(--muted);letter-spacing:.02em}
@media (max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Formulaire express (hero) */
.lead-card{background:#fff;color:var(--text);border-radius:14px;box-shadow:0 30px 60px -20px rgba(0,0,0,.45);padding:28px}
.lead-card h2{font-size:1.15rem;letter-spacing:.06em}
.lead-card .sub-title{color:var(--muted);font-size:.88rem;margin-top:6px}
.progress{display:flex;gap:6px;margin:20px 0 18px}
.progress i{flex:1;height:4px;border-radius:4px;background:var(--mist-soft)}
.progress i.on{background:var(--ink)}
.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.choice{display:flex;align-items:center;gap:10px;text-align:left;padding:12px;border:1.5px solid var(--line);border-radius:8px;background:#fff;font:600 .86rem var(--font-body);color:var(--text);cursor:pointer}
.choice svg{width:20px;height:20px;color:var(--mist-dark);flex:none}
.choice:hover{border-color:var(--mist)}
.choice[aria-pressed="true"]{border-color:var(--ink);background:var(--paper)}
.step[hidden]{display:none}
.step-q{font-weight:700;margin-bottom:12px;font-size:.95rem}
.fine{font-size:.74rem;color:var(--muted);margin-top:12px;line-height:1.5}
.form-nav{display:flex;justify-content:space-between;align-items:center;margin-top:18px;gap:10px}
.linkbtn{background:none;border:0;color:var(--muted);font:600 .85rem var(--font-body);cursor:pointer;padding:8px 0}
.done{text-align:center;padding:12px 0}
.done svg{width:48px;height:48px;color:var(--ok);margin:0 auto 12px}

/* Champs */
.field{display:grid;gap:6px;margin-bottom:12px}
.field label{font-size:.8rem;font-weight:700;color:var(--text)}
.field input,.field select,.field textarea{width:100%;font:500 .95rem var(--font-body);padding:12px 14px;border:1.5px solid var(--line);border-radius:8px;background:#fff;color:var(--text)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--ink)}
.field textarea{min-height:110px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:520px){.row2,.choice-grid{grid-template-columns:1fr}}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.78rem;color:var(--muted)}
.check input{margin-top:3px}
.hp{position:absolute;left:-9999px}
.err{color:#a23b3b;font-size:.8rem;margin-top:6px}

/* Cartes expertises */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:980px){.cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:12px;text-decoration:none;transition:border-color .2s,transform .2s,box-shadow .2s}
a.card:hover{border-color:var(--mist);transform:translateY(-3px);box-shadow:var(--shadow)}
.card .ico{width:46px;height:46px;border-radius:10px;background:var(--mist-soft);color:var(--ink);display:grid;place-items:center}
.card .ico svg{width:24px;height:24px}
.card p{color:var(--muted);font-size:.92rem}
.card .tag{font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--mist-dark)}
.card .more{margin-top:auto;padding-top:6px;font-weight:700;font-size:.86rem;color:var(--ink)}
.card-feature{background:var(--ink);color:#fff;border-color:var(--ink)}
.card-feature p{color:#c3d3dc}.card-feature .more{color:#fff}.card-feature .ico{background:rgba(255,255,255,.1);color:#fff}.card-feature .tag{color:#a9c1cf}

/* Comparatif (plateforme / expert) */
.versus{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:760px){.versus{grid-template-columns:1fr}}
.vs-col{border-radius:var(--radius);padding:28px}
.vs-col h3{font-size:.85rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:16px}
.vs-col ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.vs-col li{display:flex;gap:12px;font-size:.95rem}
.vs-col li svg{width:18px;height:18px;flex:none;margin-top:3px}
.vs-them{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);color:#c3d3dc}
.vs-us{background:#fff;color:var(--text)}
.vs-us h3{color:var(--ink)}.vs-us svg{color:var(--ok)}

/* Étapes (vraie séquence) */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}
.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.step-card .n{width:36px;height:36px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font:800 .9rem var(--font-display);margin-bottom:14px}
.step-card ul{margin:10px 0 0;padding-left:18px;color:var(--muted);font-size:.88rem;display:grid;gap:4px}

/* Simulateurs */
.sim-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.sim-tab{font:700 .84rem var(--font-body);padding:10px 16px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--text);cursor:pointer}
.sim-tab[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.sim{display:grid;grid-template-columns:1fr 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.sim>*{min-width:0}
@media (max-width:860px){.sim{grid-template-columns:1fr}}
.sim-inputs{padding:30px;display:grid;gap:22px;align-content:start}
.sim-out{background:linear-gradient(160deg,var(--ink),var(--ink-deep));color:#fff;padding:30px;display:flex;flex-direction:column;gap:18px}
.range{display:grid;gap:8px}
.range-top{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.range label{font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.range output{font:800 1.05rem var(--font-display);color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:6px;background:linear-gradient(to right,var(--ink) var(--p,50%),var(--mist-soft) var(--p,50%));outline-offset:6px}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;border:3px solid var(--ink);box-shadow:0 2px 6px rgba(0,0,0,.2);cursor:pointer}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--ink);cursor:pointer}
.big{font:800 clamp(2.2rem,5vw,3.2rem)/1 var(--font-display);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.out-label{font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:#a9c1cf;font-weight:700}
.out-lines{display:grid;gap:10px;border-top:1px solid rgba(255,255,255,.14);padding-top:16px;font-size:.9rem}
.out-lines div{display:flex;justify-content:space-between;gap:12px;color:#c3d3dc}
.out-lines b{color:#fff;font-variant-numeric:tabular-nums}
.sim-out .fine{color:#93aebd}
.sim-out .btn{margin-top:auto}

/* Avant / après */
.ba{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center}
.ba-box{background:#fff;color:var(--ink);border-radius:10px;padding:16px;text-align:center}
.ba-box.after{background:var(--mist-soft)}
.ba-box small{display:block;font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;font-weight:800;color:var(--mist-dark)}
.ba-box b{display:block;font:800 1.6rem/1.1 var(--font-display);margin-top:6px;font-variant-numeric:tabular-nums}
.ba-box span{font-size:.75rem;color:var(--muted)}
.ba-arrow{color:#a9c1cf}
.delta{display:inline-flex;align-self:flex-start;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:6px 12px;border-radius:999px;font-weight:700;font-size:.85rem}

/* Split content */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);align-items:start}
.split>*{min-width:0}
@media (max-width:860px){.split{grid-template-columns:1fr}}
.prose{display:grid;gap:16px;color:var(--muted);max-width:64ch}
.prose h3{color:var(--text);margin-top:8px}
.prose strong{color:var(--text)}
.ticks{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.ticks li{display:flex;gap:12px;align-items:flex-start}
.ticks li svg{width:20px;height:20px;flex:none;color:var(--ink);margin-top:2px}
.ticks li div{min-width:0}
.ticks li b{display:block;color:var(--text)}
.ticks li span{color:var(--muted);font-size:.92rem}
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px}

/* Avis */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:900px){.reviews{grid-template-columns:1fr}}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:14px}
.stars{color:#c7a54a;letter-spacing:2px}
.review p{color:var(--text);font-size:.95rem}
.review footer{margin-top:auto;font-size:.82rem;color:var(--muted)}
.review footer b{color:var(--text);display:block}
.rating{display:flex;align-items:center;gap:14px}
.rating b{font:800 2.6rem/1 var(--font-display);color:var(--ink)}

/* FAQ */
.faq{display:grid;gap:10px;max-width:860px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0 22px}
.faq summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:700;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:700 1.3rem/1 var(--font-display);color:var(--mist-dark);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding-bottom:18px;color:var(--muted)}

/* Équipe */
.team{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.member{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;gap:14px;align-items:center}
.avatar{width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font:800 .8rem var(--font-display);letter-spacing:.06em;flex:none}
.member b{display:block;font-size:.92rem}.member span{font-size:.8rem;color:var(--muted)}
.member>div{min-width:0}

/* Bandeau CTA */
.cta-band{border-radius:16px;padding:clamp(28px,5vw,52px);display:grid;grid-template-columns:1.4fr auto;gap:24px;align-items:center}
@media (max-width:760px){.cta-band{grid-template-columns:1fr}}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:12px}

/* Avertissement légal */
.warning{border:1.5px solid var(--ink);border-radius:var(--radius);padding:16px 20px;font-weight:700;font-size:.92rem;color:var(--ink);background:#fff}

/* Footer */
.site-footer{background:var(--ink-deep);color:#c3d3dc;padding-block:64px 28px;font-size:.88rem}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
@media (max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.foot-grid{grid-template-columns:1fr}}
.site-footer h4{font:700 .72rem var(--font-display);letter-spacing:.2em;text-transform:uppercase;color:#fff;margin:0 0 14px}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.site-footer a{color:#c3d3dc;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}
.legal{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:22px;font-size:.76rem;color:#8ea7b5;display:grid;gap:8px}

/* Bouton mobile fixe */
.mobile-bar{display:none}
@media (max-width:760px){
  .mobile-bar{display:grid;grid-template-columns:1fr 1fr;gap:8px;position:fixed;left:0;right:0;bottom:0;z-index:40;background:#fff;border-top:1px solid var(--line);padding:10px max(12px,env(safe-area-inset-right,0px)) calc(10px + env(safe-area-inset-bottom,0px)) max(12px,env(safe-area-inset-left,0px))}
  .mobile-bar .btn{padding:12px}
  body{padding-bottom:72px}
}

/* Mentions */
.legal-doc{max-width:820px;display:grid;gap:28px}
.legal-doc section{display:grid;gap:10px}
.legal-doc h2{font-size:1.1rem;letter-spacing:.06em}
.legal-doc p,.legal-doc li{color:var(--muted)}
.todo{background:#fff3cd;color:#6b5000;padding:1px 6px;border-radius:4px;font-weight:700;font-size:.85em}