:root{
  --ink:#0C2A35; --petrol:#0F3D4C; --teal:#2C7A8C; --mist:#E3EEF1; --paper:#F5F8F9;
  --amber:#FFB000; --amber-deep:#E08A00; --line:#C9DADF; --white:#fff;
  --r-lg:28px; --r-md:16px; --r-sm:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:17px;line-height:1.6}
h1,h2,h3{font-weight:800;font-family:'Avenir Next','Avenir','Segoe UI Variable Display','Trebuchet MS',system-ui,sans-serif;line-height:1.08;margin:0 0 .5em;letter-spacing:-.015em;color:var(--petrol)}
h1{font-size:clamp(2.3rem,5.4vw,4.1rem);font-weight:700}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem);font-weight:700}
h3{font-size:1.25rem;font-weight:650}
p{margin:0 0 1em;max-width:62ch}
a{color:var(--teal)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.wrap{width:min(1180px,92vw);margin:0 auto}
.skip{position:absolute;left:-999px;top:0;background:var(--amber);color:var(--ink);padding:.6rem 1rem;z-index:20}
.skip:focus{left:1rem}

/* en-tête */
header.top{position:sticky;top:0;z-index:10;background:rgba(245,248,249,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:1.5rem;padding:.7rem 0}
header.top img{height:44px;display:block}
header.top nav{margin-left:auto;display:flex;gap:1.4rem;align-items:center}
header.top nav a{color:var(--ink);text-decoration:none;font-weight:550;font-size:.95rem}
header.top nav a:hover{color:var(--teal)}
.btn{display:inline-block;background:var(--amber);color:var(--ink);font-weight:700;text-decoration:none;border:0;border-radius:999px;padding:.95rem 1.6rem;font-size:1rem;cursor:pointer;font-family:inherit;transition:background .15s,transform .15s}
.btn:hover{background:var(--amber-deep)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;border:2px solid var(--petrol);color:var(--petrol)}
.btn.ghost:hover{background:var(--petrol);color:#fff}
header.top .btn{padding:.6rem 1.1rem;font-size:.92rem}
@media(max-width:760px){header.top nav a:not(.btn){display:none}}

/* hero */
.hero{padding:clamp(2.5rem,6vw,5rem) 0 clamp(2.5rem,5vw,4rem)}
.hero .wrap{display:grid;grid-template-columns:1.02fr 1fr;gap:clamp(1.5rem,4vw,4rem);align-items:center}
.hero .lead{font-size:1.18rem;color:#27495A}
.hero .actions{display:flex;flex-wrap:wrap;gap:.9rem;margin-top:1.6rem}
.stage{background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.1rem 1.1rem 1.2rem}
.stage svg{width:100%;height:auto;display:block}
.stage .controls{display:flex;gap:.5rem;margin-top:.9rem;flex-wrap:wrap}
.stage .controls button{flex:1 1 180px;padding:.7rem 1rem;border-radius:999px;border:2px solid var(--petrol);background:#fff;color:var(--petrol);font-weight:650;font-family:inherit;font-size:.95rem;cursor:pointer;transition:background .2s,color .2s}
.stage .controls button[aria-pressed="true"]{background:var(--petrol);color:#fff}
.stage .caption{font-size:.85rem;color:#4B6B78;margin:.7rem 0 0}
.layer-a,.layer-b{transition:opacity .9s ease}
.flow{opacity:0;transition:opacity .6s ease}
.after .flow{opacity:1}
.flow path{stroke-dasharray:6 8;animation:drift 1.6s linear infinite}
@keyframes drift{to{stroke-dashoffset:-28}}
@media(max-width:900px){.hero .wrap{grid-template-columns:1fr}}

/* sections */
section{padding:clamp(3rem,7vw,6rem) 0}
.band{background:var(--petrol);color:#E8F2F4}
.band h2,.band h3{color:#fff}
.band a{color:var(--amber)}
.split{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(1.5rem,4vw,4rem);align-items:start}
@media(max-width:900px){.split{grid-template-columns:1fr}}

/* étapes : vraie séquence */
.steps{list-style:none;margin:2rem 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;counter-reset:step}
.steps li{position:relative;padding-top:3.4rem;counter-increment:step}
.steps li::before{content:counter(step);position:absolute;top:0;left:0;width:2.6rem;height:2.6rem;border-radius:50%;background:var(--amber);color:var(--ink);font-family:'Avenir Next','Avenir','Trebuchet MS',system-ui,sans-serif;font-weight:800;display:grid;place-items:center}
.steps li::after{content:"";position:absolute;top:1.3rem;left:3.2rem;right:-1rem;height:2px;background:var(--line)}
.steps li:last-child::after{display:none}
.steps h3{font-size:1.1rem;margin-bottom:.3rem}
.steps p{font-size:.95rem;margin:0}
@media(max-width:900px){.steps{grid-template-columns:1fr 1fr}.steps li::after{display:none}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}

/* explication CEE */
.chain{display:flex;flex-direction:column;gap:0;margin:0;padding:0;list-style:none}
.chain li{display:grid;grid-template-columns:auto 1fr;gap:1rem;padding:1.1rem 0;border-top:1px solid rgba(255,255,255,.18)}
.chain li:last-child{border-bottom:1px solid rgba(255,255,255,.18)}
.chain .dot{width:14px;height:14px;border-radius:50%;background:var(--amber);margin-top:.45rem}
.chain strong{display:block;color:#fff;font-size:1.05rem}
.note{font-size:.92rem;color:#B9D3DA}

/* solutions */
.sol{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1rem,3vw,2rem)}
.sol article{background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(1.4rem,3vw,2.2rem)}
.sol article.alt{background:var(--mist);border-color:transparent}
.sol ul{margin:1rem 0 0;padding-left:1.2rem}
.sol li{margin:.35rem 0}
@media(max-width:820px){.sol{grid-template-columns:1fr}}

/* formulaire */
.formgrid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(1.5rem,4vw,4rem);align-items:start}
@media(max-width:920px){.formgrid{grid-template-columns:1fr}}
.conds{list-style:none;padding:0;margin:1.2rem 0 0}
.conds li{display:flex;gap:.8rem;margin:.7rem 0}
.conds li::before{content:"";flex:0 0 1.35rem;height:1.35rem;margin-top:.15rem;border-radius:50%;background:var(--amber) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3.2 3.2L15 6.8' fill='none' stroke='%230C2A35' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/70% no-repeat}
form.lead{background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(1.3rem,3vw,2.2rem);display:grid;grid-template-columns:1fr 1fr;gap:1rem 1.1rem}
form.lead .full{grid-column:1/-1}
form.lead label{display:block;font-weight:600;font-size:.92rem;margin-bottom:.3rem;color:var(--petrol)}
form.lead input,form.lead select,form.lead textarea{width:100%;padding:.75rem .9rem;border:1.5px solid var(--line);border-radius:var(--r-sm);background:var(--paper);font:inherit;color:var(--ink)}
form.lead input:focus,form.lead select:focus,form.lead textarea:focus{border-color:var(--teal);background:#fff}
form.lead .hint{font-size:.83rem;color:#4B6B78;margin:.25rem 0 0}
form.lead fieldset{border:0;padding:0;margin:0}
form.lead legend{font-weight:700;color:var(--petrol);margin-bottom:.3rem;padding:0}
.consent{display:flex;gap:.7rem;align-items:flex-start;font-size:.9rem}
.consent input{width:auto;margin-top:.3rem}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
#status{min-height:1.5rem;font-weight:600}
#status.ok{color:#1B6B3A}
#status.err{color:#A12626}
@media(max-width:620px){form.lead{grid-template-columns:1fr}}

/* faq */
details{border-top:1px solid var(--line);padding:1.1rem 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:650;color:var(--petrol);list-style:none;display:flex;justify-content:space-between;gap:1rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:1.5rem;line-height:1;color:var(--teal);transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:.8rem 0 0}

footer{background:var(--ink);color:#B8D0D7;padding:2.5rem 0;font-size:.92rem}
footer a{color:#fff}
footer .row{display:flex;flex-wrap:wrap;gap:1.2rem 2.5rem;justify-content:space-between;align-items:flex-start}
footer img{height:46px;margin-bottom:.6rem}
footer .legal{max-width:60ch;margin:1.5rem 0 0;font-size:.85rem;color:#8FB1BB}

/* pages légales */
.doc{padding:3rem 0 5rem}
.doc h1{font-size:clamp(2rem,4vw,3rem)}
.doc h2{font-size:1.4rem;margin-top:2rem}
.doc p,.doc li{max-width:72ch}
.layer-b{opacity:0}
.after .layer-a{opacity:0}
.after .layer-b{opacity:1}
.fan{opacity:0;transition:opacity .6s ease}
.after .fan{opacity:1}

form.lead a{color:var(--teal)}
header.top img{flex:none}