:root{
  --green-dark:#325443;
  --green-deep:#0e5436;
  --cream:#f4f3ef;
  --olive:#9fa530;
  --on-olive:#1f3329;
  --slate:#c8d1d9;
  --ink:#000;
  --white:#fff;
  --soil-1:#573311;--soil-2:#48270c;--soil-3:#3d210c;--soil-4:#2b1507;
  --f-title:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --f-body:'Open Sans','Segoe UI',system-ui,-apple-system,Arial,sans-serif;
  --ease:cubic-bezier(.22,.8,.24,1);
  --nav-h:76px;
  color-scheme:light;
}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-h)}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--soil-3);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
h1,h2,h3,p,ul,dl,dd,figure{margin:0;padding:0}
ul{list-style:none}
a{color:inherit;text-decoration:none}
svg{display:block}
:focus-visible{outline:3px solid var(--olive);outline-offset:3px}
h1,h2,h3,.eyebrow,.btn,.contact{font-family:var(--f-title)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px}
@keyframes blink{50%{opacity:.25}}

/* ---------- éléments communs ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;text-align:center;background:var(--olive);color:var(--on-olive);font-weight:700;font-size:22px;line-height:1.05;padding:18px 28px;border-radius:22px;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.btn:hover{transform:translateY(-3px);box-shadow:0 14px 26px -12px rgba(50,84,67,.55)}
.eyebrow{display:flex;align-items:center;gap:10px;font:600 13px/1 var(--f-title);letter-spacing:.14em;text-transform:uppercase;color:var(--cream)}
.eyebrow--c{justify-content:center}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:var(--olive);animation:blink 1.6s ease-in-out infinite}
mark{background:linear-gradient(transparent 64%,rgba(159,165,48,.42) 0);color:inherit;padding:0 .04em}
.js .rise{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.js .rise.in{opacity:1;transform:none}

/* ============ NAV (identique sur toutes les pages) ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:80;height:var(--nav-h);display:flex;align-items:center;background:rgba(20,36,29,.5);backdrop-filter:blur(12px) saturate(1.3);-webkit-backdrop-filter:blur(12px) saturate(1.3);border-bottom:1px solid rgba(244,243,239,.09)}
.nav__in{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.nav__brand{display:flex;align-items:center;gap:10px}
.nav__mark{width:34px;height:34px;animation:navpulse 3.4s ease-in-out infinite}
@keyframes navpulse{0%,100%{transform:scale(1) rotate(0deg)}50%{transform:scale(1.1) rotate(-5deg)}}
.nav__word{width:92px;height:auto}
.nav__links{display:flex;align-items:center;gap:clamp(14px,2.2vw,32px);list-style:none;margin:0;padding:0}
.nav__links>li{position:relative}
.nav__links a,.nav__soon{display:inline-flex;align-items:center;gap:6px;color:var(--cream);font:600 13.5px/1 var(--f-title);letter-spacing:.05em;text-transform:uppercase;opacity:.92;transition:opacity .3s,color .3s;cursor:pointer}
.nav__links a:hover{opacity:1;color:var(--olive)}
.nav__lang{padding:3px 10px;border:1px solid currentColor;border-radius:999px;font-size:12px!important}
@media(max-width:860px){.nav__lang{align-self:flex-start;margin-top:6px}}
.nav__soon{opacity:.55;cursor:default}
.nav__soon i{font:600 8.5px/1 var(--f-body);letter-spacing:.04em;text-transform:none;padding:2px 6px;border-radius:999px;background:rgba(244,243,239,.14);font-style:normal}
.nav__burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:34px;height:30px;background:none;border:0;padding:0;cursor:pointer}
.nav__burger span{display:block;height:2px;background:var(--cream);border-radius:2px;transition:transform .3s,opacity .3s}
.has-sub>a .chev{transition:transform .3s var(--ease)}
.has-sub:hover>a .chev,.has-sub:focus-within>a .chev{transform:rotate(180deg)}
.sub{position:absolute;top:100%;left:0;margin-top:14px;min-width:250px;background:var(--green-deep);border-radius:18px;padding:8px;box-shadow:0 20px 40px -18px rgba(10,30,20,.6);opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .25s,transform .25s,visibility .25s}
.has-sub:hover .sub,.has-sub:focus-within .sub{opacity:1;visibility:visible;transform:none}
.sub a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;font-size:12.5px;white-space:nowrap;opacity:1}
.sub a:hover{background:rgba(244,243,239,.08);color:var(--olive)}
.sub svg{flex:none;width:17px;height:17px;color:var(--olive)}
@media(max-width:860px){
  .nav__burger{display:flex}
  .nav__links{position:fixed;inset:var(--nav-h) 0 0 auto;width:min(80vw,320px);height:calc(100dvh - var(--nav-h));background:var(--green-deep);flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:2px;padding:26px 26px;transform:translateX(100%);transition:transform .4s var(--ease);overflow-y:auto}
  .nav__links.open{transform:translateX(0)}
  .nav__links>li{width:100%}
  .nav__links a,.nav__links .nav__soon{width:100%;font-size:16px;padding:14px 0;border-bottom:1px solid rgba(244,243,239,.12)}
  .nav__burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav__burger[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav__burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .has-sub>a .chev{display:none}
  .sub{position:static;opacity:1;visibility:visible;transform:none;margin:0 0 4px;padding:0 0 0 16px;background:none;box-shadow:none}
  .sub a{padding:9px 0;border-bottom:0;font-size:14px;opacity:.85}
}

/* ============ soil décor (racines + faune, identique aux autres pages) ============ */
.soil-deco{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.soil-deco svg{position:absolute}
.deco-root{fill:none;stroke:rgba(244,243,239,.26);stroke-width:2;stroke-linecap:round;stroke-dasharray:var(--len,260);stroke-dashoffset:var(--len,260);transition:stroke-dashoffset 1.7s var(--ease)}
.soil-deco svg:nth-of-type(1) .deco-root{transition-delay:0s}
.soil-deco svg:nth-of-type(2) .deco-root{transition-delay:.15s}
.soil-deco.in .deco-root{stroke-dashoffset:0}
.deco-fauna{position:absolute;opacity:0;transform:scale(.5);transition:opacity .6s var(--ease) .35s,transform .6s var(--ease) .35s}
.soil-deco.in .deco-fauna{opacity:1;transform:scale(1)}
.deco-bug{animation:bugdrift 6.5s ease-in-out infinite alternate}
@keyframes bugdrift{from{transform:translate(0,0) rotate(0)}to{transform:translate(4px,-3px) rotate(4deg)}}
@media(max-width:700px){.soil-deco{display:none}}
.deco-worm{position:absolute;width:60px;height:22px;opacity:0;transition:opacity .6s var(--ease) .5s;animation:wormcrawlA var(--wd,17s) ease-in-out infinite alternate;animation-delay:var(--wdelay,0s);offset-rotate:0deg}
.deco-worm.b{animation-name:wormcrawlB}
.soil-deco.in .deco-worm{opacity:1}
.deco-worm svg{display:block;width:100%;height:100%;animation:wormwiggle 1.05s ease-in-out infinite alternate;animation-delay:var(--wdelay,0s)}
@keyframes wormwiggle{from{transform:scaleX(.86)}to{transform:scaleX(1.14)}}
@keyframes wormcrawlA{from{offset-path:path('M0 0Q30 -22 52 8T30 66T78 92');offset-distance:0%}to{offset-path:path('M0 0Q30 -22 52 8T30 66T78 92');offset-distance:100%}}
@keyframes wormcrawlB{from{offset-path:path('M0 0Q-28 24 -6 54T-38 92T4 130');offset-distance:0%}to{offset-path:path('M0 0Q-28 24 -6 54T-38 92T4 130');offset-distance:100%}}
@media(max-width:700px){.deco-worm{display:none}}
@media(prefers-reduced-motion:reduce){.deco-worm{animation:none;opacity:1}.deco-worm svg{animation:none}}

/* ============ PIED DE PAGE (identique sur toutes les pages) ============ */
.foot{position:relative;z-index:1;background:var(--green-deep);color:var(--cream);padding:18px 24px}
.foot__row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:32px;max-width:1240px;margin:0 auto}
.foot__mark{width:56px;justify-self:start}
.contact{display:grid;place-items:center;width:min(100%,260px);min-width:200px;height:52px;border-radius:26px;background:var(--slate);color:var(--ink);font-weight:700;font-size:17px;letter-spacing:.03em;text-transform:uppercase;transition:transform .45s var(--ease),background .35s}
.contact:hover{transform:translateY(-3px);background:#d6dde3}
.foot__id{justify-self:end;text-align:left;width:max-content}
.foot__id img{width:120px}
.foot__id address{margin:7px 0 0 42px;font-style:normal;font-size:10.5px;line-height:1.4;width:150px}

@media (max-width:900px){
  .foot{padding:18px 20px}
  .foot__row{grid-template-columns:1fr;justify-items:center;gap:16px;text-align:center}
  .foot__mark{justify-self:center;width:50px}
  .foot__id{justify-self:center;text-align:center}
  .foot__id img{width:100px;margin:0 auto}
  .foot__id address{margin:7px auto 0;width:auto;max-width:22ch;font-size:10.5px}
  .contact{font-size:16px}
}
@media (max-width:520px){
  .wrap{padding:0 18px}
}


/* ============ EN-TÊTE ============ */
.c-hero{position:relative;padding:calc(var(--nav-h) + 24px) 0 12px;background:linear-gradient(180deg,var(--soil-1),var(--soil-2));color:var(--cream);text-align:center;overflow:hidden}
.c-hero .wrap{position:relative;z-index:1}
.c-hero h1{margin:6px auto 0;max-width:16em;font-weight:700;font-size:clamp(24px,3.2vw,38px);line-height:1.12;letter-spacing:-.02em;text-wrap:balance}
.c-hero h1 mark{font-weight:700}
.c-hero p{margin:18px auto 0;max-width:46ch;font-size:17px;line-height:1.6;color:rgba(244,243,239,.85)}

/* ============ CORPS : formulaire + infos ============ */
.c-main{position:relative;background:linear-gradient(180deg,var(--soil-2),var(--soil-3));padding:0 0 clamp(24px,3vw,40px)}
.c-main .wrap{position:relative;z-index:1}
.c-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(18px,2.6vw,34px);align-items:start;margin-top:clamp(16px,2vw,26px)}
@media(max-width:900px){.c-grid{grid-template-columns:1fr;margin-top:20px}}
@media(max-width:520px){.c-submit-btn{font-size:16px;padding:13px 20px;border-radius:16px}}

.c-form{background:var(--cream);border-radius:26px;padding:clamp(14px,2vw,20px);box-shadow:0 34px 60px -30px rgba(10,6,3,.55)}
.c-field{display:flex;flex-direction:column;gap:4px;margin-top:9px}
.c-field:first-child{margin-top:0}
.c-field label{font:700 11px/1 var(--f-title);letter-spacing:.09em;text-transform:uppercase;color:var(--green-dark)}
.c-field input,.c-field textarea{border:1.5px solid #dfe1d8;border-radius:14px;padding:8px 14px;font:400 15px/1.4 var(--f-body);color:var(--ink);background:#fff;transition:border-color .25s;font-family:var(--f-body)}
.c-field textarea{resize:vertical;min-height:56px}
.c-field input:focus-visible,.c-field textarea:focus-visible{outline:none;border-color:var(--olive)}

.c-info{background:var(--green-dark);color:var(--cream);border-radius:26px;padding:clamp(14px,1.8vw,20px);box-shadow:0 30px 50px -30px rgba(10,6,3,.5)}
.c-info h2{font-weight:700;font-size:18px;letter-spacing:-.01em}
.c-info address{font-style:normal;margin-top:8px;font-size:14px;line-height:1.45;color:rgba(244,243,239,.9)}
.c-info__links{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.c-info__links a{display:flex;align-items:center;gap:10px;font:600 14px/1 var(--f-title);color:var(--cream);opacity:.92;transition:opacity .25s,color .25s}
.c-info__links a:hover{opacity:1;color:var(--olive)}
.c-info__links svg{flex:none;width:18px;height:18px;color:var(--olive)}
.c-info__note{margin-top:12px;padding-top:10px;border-top:1px solid rgba(244,243,239,.16);font-size:12px;line-height:1.45;color:rgba(244,243,239,.72)}

/* ============ VERS DE TERRE (repris exactement de la page Science) ============ */
.c-submit-zone{margin-top:10px;padding-top:9px;border-top:1px dashed rgba(50,84,67,.2)}
.soil{position:relative;height:clamp(110px,13vw,140px);background:var(--white);border-radius:18px;overflow:hidden}
.soil canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.c-submit-btn{position:absolute;top:50%;left:50%;margin:0;z-index:2;width:max-content;transform:translate(-50%,-50%);box-shadow:0 20px 40px -18px rgba(10,6,3,.6);transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.c-submit-btn:hover{transform:translate(-50%,-50%) translateY(-3px);box-shadow:0 26px 46px -18px rgba(10,6,3,.7)}
.c-captcha-err{margin:-4px 0 0;font:700 13px/1.4 var(--f-title);color:#b3261e}
.c-status{margin-top:6px;min-height:18px;text-align:center;font:700 13px/1.4 var(--f-title);color:var(--green-deep)}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .js .rise{opacity:1;transform:none}
}

.c-field--hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}