/* ==========================================================
   Expereau — l'expertise de l'eau
   Feuille de style unique · polices auto-hébergées (RGPD)
   ========================================================== */

@font-face{font-family:"Bricolage";src:url(../fonts/bricolage-grotesque-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Bricolage";src:url(../fonts/bricolage-grotesque-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Bricolage";src:url(../fonts/bricolage-grotesque-latin-800-normal.woff2) format("woff2");font-weight:800;font-display:swap}
@font-face{font-family:"Figtree";src:url(../fonts/figtree-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Figtree";src:url(../fonts/figtree-latin-400-italic.woff2) format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Figtree";src:url(../fonts/figtree-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}

:root{
  --abysse:#10243c;      /* bleu marine de la charte */
  --abysse-2:#183553;
  --lagon:#0b7f8c;       /* eau traitée */
  --lagon-clair:#5cc3cc;
  --ecume:#eef6f7;       /* fond clair */
  --calcaire:#d8cdb4;    /* tartre */
  --signal:#f2a33a;      /* appel à l'action */
  --signal-fonce:#d9861a;
  --encre:#13202e;
  --gris:#4d5b69;
  --blanc:#ffffff;
  --display:"Bricolage",system-ui,sans-serif;
  --texte:"Figtree",system-ui,sans-serif;
  --r-s:6px; --r-m:14px; --r-l:28px;
  --largeur:1180px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--texte);font-size:1.0625rem;line-height:1.65;color:var(--encre);background:var(--blanc)}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--lagon);text-underline-offset:3px;text-decoration-thickness:1.5px}
a:hover{color:var(--abysse)}
:focus-visible{outline:3px solid var(--signal);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--signal);color:var(--abysse);padding:8px 14px;border-radius:var(--r-s);z-index:100;font-weight:600}
.skip:focus{left:8px}

h1,h2,h3{font-family:var(--display);color:var(--abysse);line-height:1.08;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,5.4vw,4.4rem);font-weight:800}
h2{font-size:clamp(1.75rem,3.2vw,2.6rem);font-weight:700}
h3{font-size:1.3rem;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1.1em}
.wrap{width:min(100% - 32px,var(--largeur));margin-inline:auto}
.lead{font-size:1.2rem;color:var(--gris);max-width:58ch}

/* ---------- En-tête ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid #e3ecef}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--abysse)}
.brand-logo{width:44px;height:52px;overflow:visible}
.brand-name{font-family:var(--display);font-weight:800;font-size:1.45rem;letter-spacing:-.03em;line-height:1}
.brand-name small{display:block;font-family:var(--texte);font-weight:400;font-size:.72rem;letter-spacing:0;color:var(--gris);margin-top:3px}

/* Animation du logo : la goutte « tombe » puis la vague ondule */
.logo-drop{transform-origin:50% 90%;animation:goutte 5s var(--ease) infinite}
.logo-wave{animation:vague 3.2s linear infinite}
.brand:hover .logo-drop{animation:goutte-hover .9s var(--ease)}
@keyframes goutte{0%,70%,100%{transform:translateY(0) scale(1)}76%{transform:translateY(-5px) scale(.96,1.04)}82%{transform:translateY(1px) scale(1.06,.94)}88%{transform:translateY(0) scale(.98,1.02)}}
@keyframes goutte-hover{0%{transform:rotate(0)}30%{transform:rotate(-9deg)}60%{transform:rotate(6deg)}100%{transform:rotate(0)}}
@keyframes vague{from{transform:translateX(0)}to{transform:translateX(-24px)}}

.nav{display:flex;align-items:center;gap:4px}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:2px}
.nav a{display:block;padding:8px 11px;border-radius:var(--r-s);text-decoration:none;color:var(--encre);font-weight:600;font-size:.94rem}
.nav a:hover{background:var(--ecume);color:var(--abysse)}
.nav a[aria-current="page"]{color:var(--lagon);box-shadow:inset 0 -2px 0 var(--lagon);border-radius:0}
.nav-toggle{display:none;background:none;border:2px solid var(--abysse);border-radius:var(--r-s);padding:8px 12px;font:600 .95rem var(--texte);color:var(--abysse);cursor:pointer}

/* ---------- Boutons d'appel à l'action ---------- */
.btn{position:relative;display:inline-flex;align-items:center;gap:10px;padding:15px 26px;border-radius:999px;font:700 1rem var(--display);letter-spacing:-.005em;text-decoration:none;overflow:hidden;isolation:isolate;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background-color .25s}
.btn-cta{background:var(--signal);color:var(--abysse);box-shadow:0 6px 0 var(--signal-fonce)}
.btn-cta::after{content:"";position:absolute;inset:-2px auto -2px -60%;width:45%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.65),transparent);transform:skewX(-20deg);animation:reflet 4.5s ease-in-out infinite;z-index:-1}
.btn-cta:hover{transform:translateY(-3px);box-shadow:0 9px 0 var(--signal-fonce);color:var(--abysse)}
.btn-cta:active{transform:translateY(4px);box-shadow:0 2px 0 var(--signal-fonce)}
.btn-cta .btn-ico{width:22px;height:22px;flex:none}
.btn-cta:hover .btn-ico{animation:sonne .6s ease-in-out}
@keyframes reflet{0%,62%{left:-60%}82%,100%{left:125%}}
@keyframes sonne{0%,100%{transform:rotate(0)}20%{transform:rotate(-18deg)}40%{transform:rotate(14deg)}60%{transform:rotate(-8deg)}80%{transform:rotate(4deg)}}
.btn-ghost{background:transparent;color:var(--abysse);box-shadow:inset 0 0 0 2px var(--abysse)}
.btn-ghost:hover{background:var(--abysse);color:var(--blanc)}
.btn-header{padding:11px 18px;font-size:.92rem;margin-left:10px;white-space:nowrap}

/* Onde qui pulse autour du bouton principal du hero */
.pulse{position:relative}
.pulse::before{content:"";position:absolute;inset:0;border-radius:999px;box-shadow:0 0 0 0 rgba(242,163,58,.55);animation:onde 2.6s ease-out infinite;pointer-events:none}
@keyframes onde{0%{box-shadow:0 0 0 0 rgba(242,163,58,.55)}80%,100%{box-shadow:0 0 0 18px rgba(242,163,58,0)}}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--abysse);color:#d6e4ee;overflow:hidden;padding:72px 0 0}
.hero h1{color:var(--blanc)}
.hero .lead{color:#b9cddc}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 12px}
.hero .btn-ghost{color:var(--blanc);box-shadow:inset 0 0 0 2px rgba(255,255,255,.5)}
.hero .btn-ghost:hover{background:var(--blanc);color:var(--abysse)}
.hero-note{font-size:.9rem;color:#8fa9bf}
.hero-art{position:relative}
.hero-art img{width:100%;filter:drop-shadow(0 30px 40px rgba(0,0,0,.35));animation:flotte 7s ease-in-out infinite}
@keyframes flotte{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
.bulles span{position:absolute;bottom:-20px;width:var(--t,12px);height:var(--t,12px);border-radius:50%;border:2px solid rgba(92,195,204,.55);left:var(--x);animation:bulle var(--d,9s) linear infinite;animation-delay:var(--dl,0s)}
@keyframes bulle{0%{transform:translateY(0) translateX(0);opacity:0}10%{opacity:1}50%{transform:translateY(-280px) translateX(14px)}100%{transform:translateY(-560px) translateX(-6px);opacity:0}}
.hero-vague{display:block;width:100%;height:70px;margin-top:56px;color:var(--blanc)}

/* Hero des pages internes */
.page-hero{padding:56px 0 0}
.page-hero .hero-grid{grid-template-columns:1.3fr .7fr}
.page-hero h1{font-size:clamp(2.1rem,4.4vw,3.5rem)}
.fil{font-size:.88rem;margin-bottom:18px;color:#8fa9bf}
.fil a{color:#b9cddc}
.fil ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.fil li+li::before{content:"/";margin-right:6px;opacity:.6}

/* ---------- Jauge de dureté : élément signature ---------- */
.jauge{padding:46px 0 26px}
.jauge .jauge-barre{margin-top:52px}
.jauge-head{display:flex;justify-content:space-between;align-items:end;gap:24px;flex-wrap:wrap;margin-bottom:18px}
.jauge-head h2{font-size:1.5rem;margin:0}
.jauge-head p{margin:0;color:var(--gris);max-width:52ch;font-size:.97rem}
.jauge-barre{position:relative;height:56px;border-radius:var(--r-s);background:linear-gradient(90deg,#9fe0e4 0%,#5cc3cc 22%,#0b7f8c 38%,#c9b98f 62%,#a8916a 100%);overflow:visible}
.jauge-barre::after{content:"";position:absolute;inset:0;border-radius:inherit;background:repeating-linear-gradient(90deg,transparent 0 calc(10% - 1px),rgba(255,255,255,.55) calc(10% - 1px) 10%)}
.jauge-curseur{position:absolute;top:-10px;bottom:-10px;width:4px;background:var(--abysse);left:var(--pos,32%);border-radius:2px;animation:curseur 6s var(--ease) infinite alternate;z-index:2}
.jauge-curseur::before{content:attr(data-label);position:absolute;bottom:100%;left:50%;transform:translate(-50%,-6px);white-space:nowrap;background:var(--abysse);color:#fff;font:700 .82rem var(--display);padding:4px 9px;border-radius:var(--r-s)}
@keyframes curseur{0%{left:78%}45%,100%{left:24%}}
.jauge-echelle{display:grid;grid-template-columns:15% 15% 10% 20% 40%;margin-top:10px;font-size:.86rem;color:var(--gris)}
.jauge-echelle span{border-left:2px solid #cfdde2;padding-left:8px}
.jauge-echelle b{display:block;color:var(--abysse);font-family:var(--display)}

/* ---------- Sections ---------- */
.section{padding:84px 0}
.section-ecume{background:var(--ecume)}
.section-titre{max-width:720px;margin-bottom:44px}

.themes{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.theme{position:relative;display:flex;flex-direction:column;background:var(--blanc);border-radius:var(--r-m);padding:26px;text-decoration:none;color:var(--encre);border:1.5px solid #dbe8ec;transition:border-color .25s,transform .35s var(--ease)}
.theme:hover{border-color:var(--lagon);transform:translateY(-4px);color:var(--encre)}
.theme img{width:72px;height:72px;margin-bottom:16px;transition:transform .5s var(--ease)}
.theme:hover img{transform:rotate(-6deg) scale(1.08)}
.theme h3{margin-bottom:.35em}
.theme p{color:var(--gris);font-size:.98rem;margin:0 0 14px}
.theme .suite{margin-top:auto;font-weight:600;color:var(--lagon)}
.theme-large{grid-column:span 2;grid-row:span 2;display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;background:var(--abysse);border-color:var(--abysse);color:#c9d9e5}
.theme-large h3{color:#fff}.theme-large p{color:#b9cddc}.theme-large .suite{color:var(--signal)}
.theme-large img{width:100%;height:auto;margin:0}

.duo{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.duo-img img{border-radius:var(--r-l)}
.liste-check{list-style:none;padding:0;margin:0 0 24px}
.liste-check li{position:relative;padding:8px 0 8px 34px;border-bottom:1px solid #e3ecef}
.liste-check li::before{content:"";position:absolute;left:0;top:12px;width:20px;height:20px;border-radius:50%;background:var(--lagon) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3 3 7-7' fill='none' stroke='white' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}

/* Étapes : vraie séquence, donc numérotée */
.etapes{counter-reset:e;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:3px solid var(--abysse)}
.etapes li{counter-increment:e;padding:22px 22px 0 0}
.etapes li::before{content:counter(e);display:grid;place-items:center;width:42px;height:42px;margin:-44px 0 16px;border-radius:50%;background:var(--abysse);color:#fff;font:800 1.1rem var(--display);border:4px solid var(--blanc)}
.section-ecume .etapes li::before{border-color:var(--ecume)}
.etapes h3{font-size:1.1rem}
.etapes p{font-size:.97rem;color:var(--gris)}

/* ---------- Article ---------- */
.article-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:64px;align-items:start}
.sommaire{position:sticky;top:100px;font-size:.92rem}
.sommaire p{font-family:var(--display);font-weight:700;color:var(--abysse);margin-bottom:10px}
.sommaire ol{list-style:none;margin:0;padding:0;border-left:2px solid #d4e3e8}
.sommaire a{display:block;padding:6px 0 6px 14px;margin-left:-2px;border-left:2px solid transparent;text-decoration:none;color:var(--gris)}
.sommaire a:hover{color:var(--abysse);border-left-color:var(--lagon)}
.prose{max-width:70ch}
.prose h2{margin-top:1.8em;font-size:clamp(1.55rem,2.6vw,2.1rem);scroll-margin-top:100px}
.prose h2:first-child{margin-top:0}
.prose h3{margin-top:1.5em}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.2em}
.prose li{margin-bottom:.4em}
.prose figure{margin:2em 0}
.prose figure img{border-radius:var(--r-m);background:var(--ecume)}
.prose figcaption{font-size:.88rem;color:var(--gris);margin-top:8px}
.encadre{background:var(--ecume);border-left:4px solid var(--lagon);padding:20px 24px;border-radius:0 var(--r-m) var(--r-m) 0;margin:1.8em 0}
.encadre p:last-child{margin:0}
.encadre-alerte{background:#fff6e8;border-left-color:var(--signal)}
.tableau{width:100%;border-collapse:collapse;margin:1.4em 0 1.8em;font-size:.97rem}
.tableau th,.tableau td{text-align:left;padding:12px 14px;border-bottom:1px solid #dbe6ea;vertical-align:top}
.tableau th{font-family:var(--display);color:var(--abysse);background:var(--ecume)}
.tableau-scroll{overflow-x:auto}

/* Bloc CTA contextuel dans l'article */
.cta-inline{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;background:var(--abysse);color:#c9d9e5;border-radius:var(--r-m);padding:24px 26px;margin:2.2em 0}
.cta-inline img{width:64px;height:64px;animation:flotte 5s ease-in-out infinite}
.cta-inline p{margin:0 0 12px}
.cta-inline strong{color:#fff;font-family:var(--display);font-size:1.15rem;display:block;margin-bottom:4px}
.cta-inline .btn{padding:12px 20px;font-size:.95rem}

/* FAQ */
.faq details{border-bottom:1.5px solid #dbe6ea}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px;padding:20px 0;font:700 1.12rem/1.3 var(--display);color:var(--abysse)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:none;width:28px;height:28px;border-radius:50%;background:var(--ecume) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M10 4v12M4 10h12' stroke='%2310243c' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E") center/14px no-repeat;transition:transform .35s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg);background-color:var(--signal)}
.faq details>div{padding:0 0 20px;color:var(--gris);max-width:68ch}
.faq details[open]>div{animation:deplie .35s var(--ease)}
@keyframes deplie{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- Bandeau CTA ---------- */
.bandeau{position:relative;background:var(--lagon);color:#e6f6f7;overflow:hidden;padding:72px 0}
.bandeau .wrap{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;position:relative;z-index:1}
.bandeau h2{color:#fff;margin-bottom:.3em}
.bandeau p{margin:0;max-width:56ch;color:#d4eef0}
.bandeau-onde{position:absolute;left:0;right:0;bottom:-2px;width:200%;height:80px;color:rgba(255,255,255,.08);animation:vague-large 14s linear infinite}
@keyframes vague-large{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- Pied de page ---------- */
.site-footer{background:var(--abysse);color:#9fb6c9;padding:64px 0 28px;font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
.site-footer .brand{color:#fff;margin-bottom:14px}
.site-footer .brand-name small{color:#8fa9bf}
.site-footer h3{color:#fff;font-size:1rem;margin-bottom:12px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:7px}
.site-footer a{color:#c9d9e5;text-decoration:none}
.site-footer a:hover{color:var(--signal);text-decoration:underline}
.footer-bas{margin-top:46px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.86rem}

/* Apparition au défilement (activée seulement si JS présent) */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.vu{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .hero-grid,.page-hero .hero-grid,.duo,.article-grid,.bandeau .wrap{grid-template-columns:1fr}
  .hero-art{max-width:460px}
  .page-hero .hero-art{display:none}
  .themes{grid-template-columns:1fr 1fr}
  .theme-large{grid-column:span 2;grid-row:auto}
  .etapes{grid-template-columns:1fr 1fr;row-gap:44px}
  .sommaire{position:static;background:var(--ecume);padding:18px;border-radius:var(--r-m)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .nav-toggle{display:block}
  .nav ul{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:#fff;padding:12px 16px 20px;border-bottom:1px solid #e3ecef;box-shadow:0 20px 30px rgba(16,36,60,.12)}
  .nav.ouvert ul{display:flex}
  .nav a{padding:12px}
  .nav{gap:8px}
  .btn-header{padding:9px 14px;font-size:.85rem;margin-left:0;box-shadow:0 4px 0 var(--signal-fonce)}
}
@media (max-width:620px){
  body{font-size:1rem}
  .section{padding:60px 0}
  .hero{padding-top:44px}
  .themes{grid-template-columns:1fr}
  .theme-large{grid-column:auto;grid-template-columns:1fr}
  .nav-toggle{padding:7px 10px}
  .etapes{grid-template-columns:1fr}
  .jauge-echelle{font-size:.74rem}
  .footer-grid{grid-template-columns:1fr}
  .cta-inline{grid-template-columns:1fr}
  .brand-name small{display:none}
}
@media (max-width:370px){
  .btn-header{display:none}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}