/* ODVY — feuille de style. Palette tirée de la brochure : abysse, bleu ODVY, lagon, glace. */
:root{
  --abysse:#071E4A;
  --bleu:#1B79BF;
  --lagon:#55C5CA;
  --glace:#EEF7F9;
  --ecume:#FFFFFF;
  --encre:#0B1F3F;
  --encre-douce:#3D5673;
  --ligne:rgba(7,30,74,.12);
  --sed:#C9955B; --chim:#F07C5C; --bio:#8CD66B; --pure:#7FE6FF;
  --display:"Bricolage Grotesque",system-ui,sans-serif;
  --texte:"Instrument Sans",system-ui,sans-serif;
  --gutter:clamp(16px,5vw,72px);
  --maxw:1240px;
  --r:18px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--glace);color:var(--encre);font-family:var(--texte);font-size:clamp(16px,1.05vw,18px);line-height:1.55;overflow-x:clip}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{margin:0;font-family:var(--display);line-height:1.02;letter-spacing:-.02em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:8px;top:-60px;background:var(--abysse);color:#fff;padding:10px 14px;border-radius:8px;z-index:100}
.skip:focus{top:8px}
:focus-visible{outline:3px solid var(--lagon);outline-offset:3px}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(28px,5vw,88px);align-items:start}
.t-display{font-size:clamp(34px,5.2vw,68px);font-weight:800;font-variation-settings:"opsz" 96;color:var(--abysse);text-wrap:balance}
section{padding-block:clamp(56px,7vw,96px)}

/* Boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 22px;border-radius:999px;font-weight:600;font-size:15px;text-decoration:none;border:1.5px solid transparent;transition:transform .35s var(--ease),background .3s,color .3s,border-color .3s;cursor:pointer;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn--nav{background:var(--abysse);color:#fff}
.btn--dark{background:var(--abysse);color:#fff;border:0}
.btn--light{background:#fff;color:var(--abysse)}
.btn--ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.45);backdrop-filter:blur(6px)}
.btn--ghost:hover{background:rgba(255,255,255,.18)}

/* Navigation */
.nav{position:fixed;inset:0 0 auto 0;z-index:50;display:flex;align-items:center;gap:28px;padding:14px var(--gutter);color:#fff;transition:background .4s,color .4s,box-shadow .4s,padding .4s}
.nav.is-solid{background:rgba(238,247,249,.82);color:var(--abysse);backdrop-filter:blur(14px) saturate(1.3);-webkit-backdrop-filter:blur(14px) saturate(1.3);box-shadow:0 1px 0 var(--ligne);padding-block:10px}
.nav__logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-weight:800;font-size:24px;letter-spacing:.01em}
.nav__logo b{font-weight:500}
.nav__links{display:flex;gap:26px;margin-left:auto;font-weight:500;font-size:15px}
.nav__links a{text-decoration:none;opacity:.85;transition:opacity .2s}
.nav__links a:hover{opacity:1}
.nav.is-solid .btn--nav{background:var(--abysse);color:#fff}
.nav__burger{display:none;margin-left:auto;width:44px;height:44px;border:0;background:transparent;flex-direction:column;justify-content:center;gap:6px;align-items:center;cursor:pointer}
.nav__burger span{display:block;width:22px;height:2px;background:currentColor;transition:transform .3s}
.nav__burger[aria-expanded="true"] span:first-child{transform:translateY(4px) rotate(45deg)}
.nav__burger[aria-expanded="true"] span:last-child{transform:translateY(-4px) rotate(-45deg)}
.menu-mobile{display:none}

/* Hero — surface d'eau */
.hero{position:relative;min-height:min(84svh,900px);display:grid;align-content:end;padding:0;color:#fff;background:var(--abysse);overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0 0 auto 0;height:34%;z-index:1;pointer-events:none;background:linear-gradient(to bottom,rgba(7,30,74,.55),rgba(7,30,74,0))}
.hero__water{position:absolute;inset:0;width:100%;height:100%;z-index:0;touch-action:pan-y}
.hero__produit{position:absolute;right:4%;top:12%;height:64%;width:auto;z-index:0;transform:rotate(-10deg);filter:drop-shadow(0 18px 40px rgba(3,20,60,.45))}
.hero__fallback{position:absolute;inset:0;z-index:-1;background:radial-gradient(120% 80% at 70% 20%,#2a9bd8 0%,#1b79bf 30%,#0b2f6f 70%,#071e4a 100%)}
.hero__content{position:relative;z-index:1;padding:0 var(--gutter) clamp(36px,5vh,64px);width:100%;display:grid;gap:22px;pointer-events:none}
.hero__content > *{pointer-events:auto}
.hero__lead{max-width:38rem;font-size:clamp(17px,1.35vw,21px);line-height:1.5;color:rgba(255,255,255,.9);text-wrap:pretty}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px}
.hero__hint{position:absolute;right:var(--gutter);bottom:18px;z-index:1;display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.02em;color:rgba(255,255,255,.7);pointer-events:none}
.hero__ripple{width:12px;height:12px;border-radius:50%;border:1.5px solid rgba(255,255,255,.8);position:relative}
.hero__ripple::after{content:"";position:absolute;inset:-6px;border-radius:50%;border:1px solid rgba(255,255,255,.5);animation:ondes 2.4s ease-out infinite}
@keyframes ondes{0%{transform:scale(.4);opacity:1}100%{transform:scale(1.6);opacity:0}}
.hero.is-touched .hero__hint{opacity:0;transition:opacity .8s}

/* Manifeste */
.manifeste{background:var(--glace)}
.manifeste__texte{display:grid;gap:22px;font-size:clamp(17px,1.3vw,20px);color:var(--encre-douce);max-width:42rem}
.manifeste__texte p:first-child{color:var(--encre);font-size:clamp(20px,1.7vw,26px);line-height:1.4;font-weight:500}
.faits{display:grid;grid-template-columns:repeat(4,1fr);gap:18px 20px;margin:14px 0 0;padding-top:22px;border-top:1px solid var(--ligne)}
.faits div{display:grid;gap:4px}
.faits dt{font-size:13px;color:var(--encre-douce)}
.faits dd{margin:0;font-family:var(--display);font-weight:700;font-size:22px;color:var(--abysse)}

/* Système 3D — section épinglée par position:sticky */
.systeme{padding:0;background:linear-gradient(180deg,var(--glace) 0%,#d9eef3 100%);height:360vh;position:relative}
.systeme__pin{position:sticky;top:0;height:100svh;--p:0;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter);gap:clamp(20px,4vw,64px);align-items:center;overflow:hidden}
.systeme__scene{position:relative;height:min(78svh,720px);display:grid;grid-template-rows:minmax(0,1fr) auto;gap:22px}
.systeme__scene canvas{width:100%;height:100%;min-height:0;display:block}
.systeme__legende{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:12.5px;color:var(--encre-douce)}
.leg{display:inline-flex;align-items:center;gap:7px}
.leg::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--c)}
.leg--sed{--c:var(--sed)}.leg--chim{--c:var(--chim)}.leg--bio{--c:var(--bio)}.leg--pure{--c:var(--pure)}
.systeme__texte{display:grid;gap:28px;align-content:center}
.etapes{display:grid;gap:6px;counter-reset:etape}
.etape{position:relative;padding:14px 18px 14px 58px;border-radius:14px;transition:background .5s,opacity .5s;opacity:.45;counter-increment:etape}
.etape::before{content:counter(etape);position:absolute;left:16px;top:14px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-family:var(--display);font-weight:700;font-size:14px;color:var(--abysse);border:1.5px solid var(--abysse);transition:background .4s,color .4s}
.etape.is-active{opacity:1;background:rgba(255,255,255,.7)}
.etape.is-active::before{background:var(--abysse);color:#fff}
.etape h3{font-size:20px;font-weight:700;margin-bottom:6px}
.etape p{color:var(--encre-douce);font-size:15.5px;line-height:1.5}
.etape:not(.is-active) p{display:none}
.vanne{display:grid;grid-template-columns:110px 1fr;gap:18px;align-items:center;padding:16px;border-radius:14px;background:rgba(7,30,74,.06);opacity:0;transform:translateY(14px);transition:opacity .6s,transform .6s var(--ease)}
.vanne.is-visible{opacity:1;transform:none}
.vanne img{border-radius:10px;mix-blend-mode:multiply}
.vanne h3{font-size:18px;margin-bottom:6px}
.vanne p{font-size:14.5px;color:var(--encre-douce)}

/* Barre de progression de la section épinglée */
.progres{position:absolute;left:var(--gutter);right:var(--gutter);bottom:22px;display:grid;gap:10px;justify-items:center;pointer-events:none}
.progres__indice{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--encre-douce);transition:opacity .5s,transform .5s var(--ease)}
.progres__indice i{width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);animation:chevron 1.6s ease-in-out infinite}
@keyframes chevron{0%,100%{transform:rotate(45deg) translate(-2px,-2px)}50%{transform:rotate(45deg) translate(1px,1px)}}
.progres.is-started .progres__indice{opacity:0;transform:translateY(6px)}
.progres__barre{position:relative;width:100%;height:4px;border-radius:999px;background:rgba(7,30,74,.10);overflow:visible}
.progres__barre b{position:absolute;inset:0;border-radius:999px;background:linear-gradient(90deg,var(--lagon),var(--bleu));transform:scaleX(var(--p));transform-origin:left center;will-change:transform}
.progres__barre i{position:absolute;top:50%;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;background:var(--glace);border:2px solid rgba(7,30,74,.18);transition:border-color .3s,background .3s}
.progres__barre i.is-passed{background:var(--lagon);border-color:var(--lagon)}

/* Ce qu'ODVY retient */
.retient{background:var(--abysse);color:#fff;position:relative;overflow:hidden}
.retient .t-display{color:#fff}
.retient__intro{max-width:44rem;margin-top:22px;color:rgba(255,255,255,.78);font-size:clamp(16px,1.2vw,19px)}
.contaminants{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;perspective:800px}
.contaminants li{--d:1;padding:12px 20px;border-radius:999px;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.05);font-weight:500;font-size:15.5px;transition:transform .45s var(--ease),opacity .45s,filter .45s,background .45s,text-decoration-color .3s;transform:translateY(calc((1 - var(--d)) * 22px)) scale(calc(.85 + .15*var(--d)));opacity:calc(.45 + .55*var(--d));filter:blur(calc((1 - var(--d)) * 3px));will-change:transform,opacity,filter;text-decoration:line-through;text-decoration-color:transparent;text-decoration-thickness:2px}
.contaminants li.is-caught{background:var(--lagon);color:var(--abysse);border-color:var(--lagon);text-decoration-color:var(--abysse)}

/* Comparaison */
.comparer{background:var(--glace)}
.switch{position:relative;display:inline-grid;grid-auto-flow:column;grid-auto-columns:1fr;margin-top:26px;padding:4px;border-radius:999px;background:#fff;border:1px solid var(--ligne)}
.switch button{position:relative;z-index:1;border:0;background:transparent;padding:10px 22px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;color:var(--encre-douce);transition:color .3s}
.switch button[aria-selected="true"]{color:#fff}
.switch__glide{position:absolute;top:4px;bottom:4px;left:4px;width:calc(50% - 4px);border-radius:999px;background:var(--abysse);transition:transform .45s var(--ease)}
.switch[data-on="uv"] .switch__glide{transform:translateX(100%)}
.cmp{width:100%;margin-top:22px;border-collapse:collapse;font-size:15.5px}
.cmp th{text-align:left;font-family:var(--display);font-weight:700;font-size:17px;padding:14px 12px;color:var(--abysse);border-bottom:1.5px solid var(--abysse)}
.cmp th:not(:first-child),.cmp td:not(:first-child){text-align:center;width:130px}
.cmp td{padding:13px 12px;border-bottom:1px solid var(--ligne);color:var(--encre)}
.cmp tbody tr{animation:ligne .5s var(--ease) both;animation-delay:calc(var(--i) * 45ms)}
@keyframes ligne{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.cmp .oui,.cmp .non{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;font-size:0}
.cmp .oui{background:var(--lagon)}
.cmp .non{background:rgba(7,30,74,.08)}
.cmp .oui::after{content:"";width:12px;height:7px;border-left:2.5px solid var(--abysse);border-bottom:2.5px solid var(--abysse);transform:translateY(-2px) rotate(-45deg)}
.cmp .non::after{content:"";width:10px;height:2px;background:var(--encre-douce)}
.cmp td:last-child{background:rgba(85,197,202,.08)}

/* Bienfaits */
.bienfaits{background:#fff}
.bienfaits__media{display:grid;gap:22px;position:sticky;top:90px}
.bienfaits__media img{border-radius:var(--r);aspect-ratio:4/3;object-fit:cover}
.bienfaits__media p{color:var(--encre-douce);max-width:34rem;font-size:17px}
.bienfaits__liste{display:grid;gap:0;counter-reset:b;padding-top:10px}
.bienfaits__liste li{display:grid;grid-template-columns:32px 1fr;gap:10px;padding:13px 0;border-bottom:1px solid var(--ligne);font-size:clamp(16px,1.2vw,18.5px);line-height:1.45;counter-increment:b}
.bienfaits__liste li::before{content:"";width:14px;height:14px;margin-top:7px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);background:linear-gradient(135deg,var(--lagon),var(--bleu))}

/* Certifications */
.certifs{background:var(--glace)}
.certifs__tete{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(20px,4vw,64px);align-items:end}
.certifs__tete p{color:var(--encre-douce);font-size:clamp(16px,1.25vw,19px);max-width:40rem}
.certifs__liste{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:38px}
.certifs__liste li{display:grid;grid-template-rows:1fr auto;justify-items:center;gap:14px;padding:26px 18px 20px;background:#fff;border-radius:var(--r);border:1px solid var(--ligne)}
.certifs__liste img{width:auto;height:64px;max-width:100%;object-fit:contain;filter:grayscale(1);opacity:.78;transition:filter .4s,opacity .4s}
.certifs__liste li:hover img{filter:none;opacity:1}
.certifs__liste span{font-size:13.5px;font-weight:500;color:var(--encre-douce);text-align:center}
@media (max-width:960px){.certifs__tete{grid-template-columns:1fr}.certifs__liste{grid-template-columns:1fr 1fr;gap:10px}.certifs__liste img{height:52px}}
@media (prefers-reduced-motion:reduce){.certifs__liste img{transition:none}}

/* Contact */
.contact{background:linear-gradient(180deg,var(--glace),#dbeef2)}
.contact__intro p{margin-top:18px;color:var(--encre-douce);font-size:17px;max-width:30rem}
.contact address{display:grid;gap:8px;margin-top:30px;font-style:normal;font-family:var(--display);font-weight:700;font-size:22px;color:var(--abysse)}
.contact address a{text-decoration:none}
.contact address span{font-family:var(--texte);font-weight:400;font-size:15px;color:var(--encre-douce)}
.form{display:grid;gap:16px;background:#fff;padding:clamp(20px,3vw,36px);border-radius:24px;box-shadow:0 30px 60px -40px rgba(7,30,74,.35)}
.form label{display:grid;gap:6px;font-size:14px;font-weight:500;color:var(--encre-douce)}
.form input:not([type=radio]),.form textarea{width:100%;padding:12px 14px;border:1.5px solid var(--ligne);border-radius:12px;background:var(--glace);font:inherit;color:var(--encre);transition:border-color .2s,background .2s}
.form input:focus,.form textarea:focus{border-color:var(--bleu);background:#fff;outline:0}
.form textarea{resize:vertical;min-height:110px}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form__type{border:0;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.form__type legend{font-size:14px;font-weight:500;color:var(--encre-douce);margin-bottom:8px}
.form__type label{display:inline-flex}
.form__type input{position:absolute;opacity:0;pointer-events:none}
.form__type span{padding:9px 16px;border-radius:999px;border:1.5px solid var(--ligne);cursor:pointer;font-size:14.5px;color:var(--encre);transition:background .2s,border-color .2s,color .2s}
.form__type input:checked + span{background:var(--abysse);color:#fff;border-color:var(--abysse)}
.form__type input:focus-visible + span{outline:3px solid var(--lagon)}
.form .btn{justify-self:start;margin-top:4px}
.form__note{font-size:14px;color:var(--encre-douce);min-height:1.2em}
.form__note.is-error{color:#b3361f}

/* Pied de page */
.footer{background:var(--abysse);color:rgba(255,255,255,.75);padding:34px 0;font-size:14px}
.footer__in{display:grid;gap:14px}
.footer .nav__logo{color:#fff}
.footer a{color:#fff;text-decoration:none}

/* Responsive */
@media (max-width:960px){
  .wrap--split{grid-template-columns:1fr}
  .nav__links,.btn--nav{display:none}
  .nav__burger{display:flex}
  .menu-mobile{display:grid;gap:6px;align-content:start;position:fixed;inset:0;z-index:40;padding:96px var(--gutter) 40px;background:var(--glace);color:var(--abysse);font-family:var(--display);font-weight:700;font-size:34px;transform:translateY(-100%);transition:transform .5s var(--ease);visibility:hidden}
  .menu-mobile a{text-decoration:none;padding:8px 0}
  .menu-mobile .btn{margin-top:26px;font-size:16px;font-family:var(--texte);justify-self:start}
  .menu-mobile.is-open{transform:none;visibility:visible}
  .nav.is-menu{color:var(--abysse);background:transparent;box-shadow:none;backdrop-filter:none}
  .systeme{height:380vh}
  .systeme__pin{grid-template-columns:1fr;grid-template-rows:auto auto;align-content:start;align-items:start;padding-top:72px;padding-bottom:44px;gap:10px}
  .systeme__scene{height:46svh;gap:12px}
  .systeme__scene canvas{min-height:0;height:100%}
  .systeme__texte{gap:14px;align-content:end}
  .systeme .t-display{font-size:clamp(26px,7vw,34px)}
  .etapes{display:grid}
  .etape{display:none;padding:12px 14px 12px 50px}
  .etape.is-active{display:block}
  .etape::before{left:12px;top:12px;width:26px;height:26px}
  .etape p{font-size:14.5px}
  .vanne{display:none}
  .vanne.is-visible{display:grid;grid-template-columns:70px 1fr;padding:10px}
  .vanne p{display:none}
  .progres{bottom:10px;gap:6px}
  .progres__indice{font-size:12px}
  .bienfaits__media{position:static}
  .form__row{grid-template-columns:1fr}
  .faits{grid-template-columns:1fr 1fr}
}
@media (max-width:1100px) and (min-width:961px){
  .faits{grid-template-columns:1fr 1fr}
  .cmp th:not(:first-child),.cmp td:not(:first-child){width:72px}
  .cmp{font-size:14px}
}
@media (max-width:520px){
  .hero{min-height:min(88svh,760px)}
  .hero__content{gap:18px;padding-bottom:30px}
  .hero__actions{gap:8px}
  .hero__actions .btn{width:100%}
  .hero__hint{display:none}
}
@media (prefers-reduced-motion:reduce){
  .progres__indice i{animation:none}
  .btn,.etape,.vanne,.contaminants li,.switch__glide,.menu-mobile{transition:none}
  .cmp tbody tr{animation:none}
  .hero__ripple::after{animation:none}
}
@media (max-height:760px) and (min-width:961px){
  .systeme .t-display{font-size:clamp(28px,3.6vw,44px)}
  .vanne{display:none}
  .systeme__texte{gap:16px}
  .etape{padding-block:10px}
  .etape h3{font-size:17px}
  .etape p{font-size:14px}
}