/* Biosynergie — design system
   Encre profonde + papier, un accent vert (logo), Geist / Geist Mono. */
:root{
  --ink:#0c1512; --ink-2:#3d4a45; --ink-3:#6f7b76;
  --paper:#f7f6f2; --paper-2:#efede6; --white:#fff;
  --line:rgba(12,21,18,.12); --line-2:rgba(12,21,18,.06);
  --accent:#1f8a4c; --lime:#c9f27a;
  --dark:#0c1512; --dline:rgba(255,255,255,.12);
  --r:6px; --r2:12px;
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --pad:clamp(4rem,8vw,7.5rem);
  --ease:cubic-bezier(.2,.7,.2,1);
  --top:68px;
}
*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;overflow-x:clip;scroll-padding-top:90px}
body{font:400 17px/1.6 var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;overflow-x:clip}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
strong{font-weight:600}
.wrap{width:min(1240px,100% - 2*clamp(1.25rem,4vw,3rem));margin-inline:auto}
.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;z-index:999;background:var(--ink);color:#fff;padding:.6rem 1rem;border-radius:var(--r)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

h1,h2,h3{font-weight:500;letter-spacing:-.035em;line-height:1.05}
h1{font-size:clamp(2.6rem,6vw,5.4rem)}
h2{font-size:clamp(1.7rem,3vw,2.6rem)}
h3{font-size:1.2rem;letter-spacing:-.02em;line-height:1.25}
.mono{font-family:var(--mono);font-size:.74rem;letter-spacing:.04em;text-transform:uppercase;font-weight:500}
.dim{color:var(--ink-3)}
.muted{color:var(--ink-2)}
.mt{margin-top:2rem}
.big{font-size:clamp(1.35rem,2.4vw,2.05rem);letter-spacing:-.025em;line-height:1.28}
.kicker{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);display:flex;align-items:center;gap:.7rem;margin-bottom:1.3rem}
.kicker:before{content:"";width:22px;height:1px;background:currentColor}
.kicker.light{color:var(--lime)}
.lead{font-size:clamp(1.05rem,1.45vw,1.25rem);color:var(--ink-2);max-width:60ch;margin-top:1.4rem;line-height:1.55}
.ar{width:15px;height:15px;flex:none;transition:transform .3s var(--ease)}

/* boutons */
.btn{display:inline-flex;align-items:center;gap:.6rem;height:48px;padding:0 1.35rem;border-radius:999px;background:var(--ink);color:#fff;font-weight:500;font-size:.95rem;white-space:nowrap;transition:background .25s,color .25s,box-shadow .25s}
.btn:hover{background:var(--accent)}
.btn:hover .ar,.more:hover .ar,a:hover>.go .ar,.pg:hover .mono{transform:translateX(3px)}
.btn.sm{height:38px;padding:0 1rem;font-size:.87rem}
.btn.line{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn.line:hover{box-shadow:inset 0 0 0 1px var(--ink)}
.btn.glass{background:rgba(255,255,255,.08);box-shadow:inset 0 0 0 1px rgba(255,255,255,.25);backdrop-filter:blur(10px)}
.btn.glass:hover{background:rgba(255,255,255,.16)}
.hero .btn:not(.glass),.pdfband .btn:not(.line),.foot .btn{background:var(--lime);color:var(--ink)}
.hero .btn:not(.glass):hover,.pdfband .btn:not(.line):hover,.foot .btn:hover{background:#fff}
.more{display:inline-flex;align-items:center;gap:.55rem;margin-top:1.8rem;font-weight:500;font-size:.95rem;border-bottom:1px solid var(--line);padding-bottom:.25rem;transition:border-color .2s}
.more:hover{border-color:var(--ink)}
.more.light{color:#fff;border-color:var(--dline)}.more.light:hover{border-color:#fff}

/* progression de lecture */
.progress{position:fixed;top:0;left:0;height:2px;width:100%;background:var(--accent);transform-origin:0 50%;transform:scaleX(var(--sp,0));z-index:80;pointer-events:none}

/* en-tête : toujours lisible */
.top{position:sticky;top:0;z-index:60;background:rgba(247,246,242,.94);backdrop-filter:saturate(1.5) blur(14px);-webkit-backdrop-filter:saturate(1.5) blur(14px);border-bottom:1px solid var(--line);transition:background .35s,border-color .35s,color .35s}
.home .top{position:fixed;inset:0 0 auto}
.home .top.over{background:transparent;border-color:transparent;color:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}
.top-in{display:flex;align-items:center;gap:1.1rem;height:var(--top)}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:600;letter-spacing:-.02em;font-size:1.05rem}
.brand img{width:34px;height:auto}
.menu{margin-left:auto}
.menu>ul{display:flex;list-style:none;gap:.1rem}
.dd{position:relative}
.dd>button{display:flex;align-items:center;gap:.45rem;height:38px;padding:0 .8rem;border-radius:999px;font-size:.9rem;transition:background .2s}
.dd>button:hover,.dd.open>button{background:var(--line-2)}
.over .dd>button:hover,.over .dd.open>button{background:rgba(255,255,255,.1)}
.dd.active>button{box-shadow:inset 0 -2px 0 var(--accent);border-radius:0}
.dd>button i{width:6px;height:6px;border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;transform:translateY(-2px) rotate(45deg);transition:transform .25s}
.dd.open>button i{transform:translateY(1px) rotate(225deg)}
.dd>ul{position:absolute;top:calc(100% + 10px);left:-.4rem;min-width:280px;list-style:none;padding:.4rem;background:var(--white);color:var(--ink);border:1px solid var(--line);border-radius:var(--r2);box-shadow:0 24px 60px -24px rgba(12,21,18,.35);opacity:0;visibility:hidden;transform:translateY(-6px);transition:.22s var(--ease)}
.dd>ul:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.dd.open>ul{opacity:1;visibility:visible;transform:none}
.dd>ul a{display:flex;justify-content:space-between;padding:.7rem .85rem;border-radius:8px;font-size:.93rem;transition:background .15s,padding .2s}
.dd>ul a:hover{background:var(--paper);padding-left:1.05rem}
.dd>ul a[aria-current]{color:var(--accent);font-weight:500}
.lang{display:flex;gap:2px;padding:3px;border-radius:999px;box-shadow:inset 0 0 0 1px var(--line);font-family:var(--mono);font-size:.72rem;font-weight:500}
.over .lang{box-shadow:inset 0 0 0 1px rgba(255,255,255,.28)}
.lang a{display:flex;align-items:center;gap:.4rem;height:30px;padding:0 .6rem;border-radius:999px;opacity:.6;transition:.2s}
.lang a:hover{opacity:1}
.lang a[aria-current]{opacity:1;background:var(--ink);color:#fff}
.over .lang a[aria-current]{background:#fff;color:var(--ink)}
.lang svg{width:18px;height:12px;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.12)}
.over .top-cta{background:#fff;color:var(--ink)}
.burger{display:none;width:40px;height:40px;position:relative;margin-right:-8px}
.burger span,.burger span:before,.burger span:after{position:absolute;left:10px;width:20px;height:1.5px;background:currentColor;content:"";transition:.3s var(--ease)}
.burger span{top:19px}.burger span:before{top:-6px;left:0}.burger span:after{top:6px;left:0}
.menu-open .burger span{background:transparent}
.menu-open .burger span:before{top:0;transform:rotate(45deg)}
.menu-open .burger span:after{top:0;transform:rotate(-45deg)}

/* héros */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;color:#fff;background:var(--dark);overflow:hidden;isolation:isolate}
.hero-v{position:absolute;inset:-4% 0 0;width:100%;height:104%;object-fit:cover;z-index:-2;transform:translateY(var(--hy,0));will-change:transform}
.hero-shade{position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(12,21,18,.55),rgba(12,21,18,.12) 35%,rgba(12,21,18,.72) 78%,rgba(12,21,18,.95)),radial-gradient(80% 60% at 0 100%,rgba(12,21,18,.65),transparent)}
.hero-in{padding:9rem 0 3.5rem}
.hero h1{font-weight:450;max-width:14ch}
.hero-sub{font-size:clamp(1.3rem,2.4vw,2rem);color:var(--lime);margin-top:.8rem;letter-spacing:-.02em}
.hero-cta{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2.4rem}
.hero-facts{border-top:1px solid var(--dline);background:rgba(12,21,18,.35);backdrop-filter:blur(8px)}
.facts{display:grid;grid-template-columns:repeat(3,1fr)}
.facts p{padding:1.3rem 1.2rem 1.4rem 0;font-size:.95rem;color:rgba(255,255,255,.82)}
.facts p+p{padding-left:1.4rem;border-left:1px solid var(--dline)}
.hero-a{opacity:0;transform:translateY(22px);animation:up 1s var(--ease) forwards}
.hero-a:nth-child(2){animation-delay:.12s}.hero-a:nth-child(3){animation-delay:.24s}.hero-a:nth-child(4){animation-delay:.36s}
.hero-facts.hero-a{animation-delay:.55s}
@keyframes up{to{opacity:1;transform:none}}

/* en-tête de page */
.phead{border-bottom:1px solid var(--line);overflow:hidden}
.phead-in{display:grid;grid-template-columns:1fr;gap:clamp(2rem,5vw,4rem);align-items:end;padding:clamp(3rem,7vw,5.5rem) 0 clamp(2.5rem,5vw,4rem)}
.phead.has-img .phead-in{grid-template-columns:1.15fr .85fr;align-items:center}
.phead h1{font-size:clamp(2.3rem,5vw,4.4rem);max-width:16ch}
.phead .lead strong{color:var(--ink);font-weight:500}
.phead-img{aspect-ratio:4/3;border-radius:var(--r);overflow:hidden;background:var(--paper-2)}
.phead-img img{width:100%;height:100%;object-fit:cover}
.crumb{display:flex;flex-wrap:wrap;gap:.5rem;color:var(--ink-3);margin-bottom:1.4rem}
.crumb a:hover{color:var(--ink)}
.crumb [aria-current]{color:var(--accent)}
.split-in{animation:up .9s var(--ease) both}
.fade-in{animation:up .9s .12s var(--ease) both}
.phead-img{animation:reveal 1.2s .1s var(--ease) both}
@keyframes reveal{from{clip-path:inset(0 0 100% 0)}to{clip-path:inset(0)}}

/* sections */
.sec{padding:var(--pad) 0}
.sec.pt-s{padding-top:clamp(2.5rem,5vw,4rem)}
.sec.alt{background:var(--paper-2)}
.sec.dark{background:var(--dark);color:#fff}
.shead{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:2rem;border-top:1px solid var(--line);padding-top:1.2rem}
.shead .kicker{margin:0}.shead .more{margin:0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.5rem,6vw,6rem);align-items:center}
.split.top{align-items:start}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1rem,2vw,1.5rem)}
.quad{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(1rem,2vw,1.5rem)}
.prose p{font-size:1.08rem;color:var(--ink-2);max-width:56ch}
.prose p+p{margin-top:1.4rem}
.prose .strong{font-size:clamp(1.25rem,2vw,1.6rem);color:var(--ink);letter-spacing:-.02em;line-height:1.35}
.label{margin-bottom:.9rem}
.block-h{margin-bottom:2.2rem;max-width:60ch}.block-h .muted{margin-top:.8rem}
.tag-line{margin-bottom:2rem}

/* photos */
.ph{margin:0}
.ph a{display:block;overflow:hidden;border-radius:var(--r);background:var(--paper-2)}
.ph img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease)}
.ph a:hover img{transform:scale(1.04)}
.ph figcaption{font-size:.86rem;color:var(--ink-3);margin-top:.7rem;line-height:1.45;max-width:46ch}
.ph.plain a{background:#fff;padding:clamp(.8rem,2vw,1.5rem);border:1px solid var(--line)}
.ph.plain img{object-fit:contain}
.ph.plain a:hover img{transform:none}
.ph.narrow{max-width:760px}

/* accueil */
.intro{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.5rem,6vw,6rem);align-items:center}
.intro .muted{margin-top:1.3rem;max-width:48ch}
.mosaic{display:grid;grid-template-columns:1.1fr 1fr;grid-template-rows:auto auto;gap:clamp(.8rem,1.5vw,1.2rem)}
.mosaic .m1{grid-row:span 2}
.mosaic .m2,.mosaic .m3{align-self:end}
.domains{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1rem,2vw,1.5rem)}
.domain{position:relative;display:flex;flex-direction:column;justify-content:flex-end;aspect-ratio:16/11;border-radius:var(--r);overflow:hidden;color:#fff;isolation:isolate;padding:clamp(1.3rem,3vw,2.2rem)}
.domain img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;transition:transform 1.4s var(--ease)}
.domain:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,transparent 40%,rgba(12,21,18,.85))}
.domain h3{font-size:clamp(1.35rem,2.2vw,1.85rem);max-width:18ch}
.domain .mono{color:var(--lime);margin-top:.6rem}
.domain:hover img{transform:scale(1.05)}
.nautic{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2.5rem,6vw,6rem);align-items:center}
.nautic .muted{margin-top:1rem}

/* comparateur */
.cmp{margin:0}
.cmp-box{position:relative;aspect-ratio:4/3;border-radius:var(--r);overflow:hidden;background:#222;user-select:none;touch-action:pan-y}
.cmp-box>img,.cmp-before img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cmp-before{position:absolute;inset:0;clip-path:inset(0 calc(100% - var(--p)) 0 0)}
.cmp-handle{position:absolute;top:0;bottom:0;left:var(--p);width:2px;margin-left:-1px;background:#fff;pointer-events:none}
.cmp-handle span{position:absolute;top:50%;left:50%;width:42px;height:42px;margin:-21px 0 0 -21px;border-radius:50%;background:#fff;box-shadow:0 6px 20px rgba(0,0,0,.3)}
.cmp-handle span:before,.cmp-handle span:after{content:"";position:absolute;top:50%;width:7px;height:7px;border-left:1.6px solid var(--ink);border-bottom:1.6px solid var(--ink)}
.cmp-handle span:before{left:11px;transform:translateY(-50%) rotate(45deg)}
.cmp-handle span:after{right:11px;transform:translateY(-50%) rotate(-135deg)}
.cmp input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:ew-resize;margin:0}
.cmp-box.anim .cmp-before{transition:clip-path .9s var(--ease)}.cmp-box.anim .cmp-handle{transition:left .9s var(--ease)}
.cmp figcaption{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:.9rem;font-size:.88rem;color:var(--ink-3);line-height:1.45}
.cmp figcaption span:last-child{text-align:right}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:.45rem;vertical-align:1px}
.dot.b{background:#c4683c}.dot.a{background:var(--accent)}
.dark .cmp figcaption{color:rgba(255,255,255,.65)}.dark .dot.a{background:var(--lime)}
.cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,4vw,3.5rem) clamp(1rem,2.5vw,2rem)}

/* études de cas */
.cases{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(1rem,1.6vw,1.4rem)}
.cases.all{grid-template-columns:repeat(3,1fr)}
.case{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;transition:border-color .25s,transform .4s var(--ease),box-shadow .4s}
.case:hover{border-color:rgba(12,21,18,.28);transform:translateY(-4px);box-shadow:0 22px 44px -30px rgba(12,21,18,.5)}
.case[hidden]{display:none}
.case-img{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2)}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease)}
.case:hover .case-img img{transform:scale(1.05)}
.case-body{padding:1.15rem 1.25rem 1.2rem;display:flex;flex-direction:column;gap:.35rem;flex:1}
.case-body h3{font-size:1.08rem}
.case-body>p{color:var(--ink-2);font-size:.9rem;line-height:1.45}
.metric{margin-top:auto!important;padding-top:.9rem;border-top:1px dashed var(--line);display:flex;align-items:baseline;gap:.55rem;flex-wrap:wrap}
.metric strong{font-size:1.5rem;font-weight:500;letter-spacing:-.03em;color:var(--ink)}
.metric span{font-size:.8rem;color:var(--ink-3)}
.go{display:inline-flex;align-items:center;gap:.45rem;color:var(--accent);margin-top:.5rem}
.case-body>.go:only-of-type{margin-top:auto}
.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem}
.filters button{height:36px;padding:0 1rem;border-radius:999px;font-size:.88rem;box-shadow:inset 0 0 0 1px var(--line);transition:.2s}
.filters button:hover{box-shadow:inset 0 0 0 1px var(--ink)}
.filters button.on{background:var(--ink);color:#fff;box-shadow:none}

/* gammes */
.ranges{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1rem,2vw,1.5rem)}
.range-card{display:grid;grid-template-columns:40% 1fr;background:var(--white);border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;transition:border-color .25s}
.range-card:hover{border-color:rgba(12,21,18,.28)}
.rc-img{overflow:hidden;min-height:240px}
.rc-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease)}
.range-card:hover .rc-img img{transform:scale(1.05)}
.range-card>div:last-child{padding:clamp(1.3rem,2.5vw,2rem);display:flex;flex-direction:column;gap:.55rem}
.range-card .mono{color:var(--accent)}
.range-card h3{font-size:1.45rem}
.range-card p:not(.mono){color:var(--ink-2);font-size:.93rem}
.range-card .go{margin-top:auto}
.spec{display:grid;grid-template-columns:300px 1fr;gap:clamp(2rem,5vw,4.5rem);align-items:start}
.specs{position:sticky;top:96px;border-top:1px solid var(--ink)}
.specs>.mono{padding:.9rem 0}
.specs>div{padding:1.1rem 0;border-top:1px solid var(--line)}
.specs strong{display:block;font-size:2.2rem;font-weight:500;letter-spacing:-.03em;line-height:1.1}
.specs span{font-size:.88rem;color:var(--ink-2)}
.dose p{font-size:.88rem;color:var(--ink-2)}
.ptable{width:100%;border-collapse:collapse;font-size:.98rem;border-top:1px solid var(--ink)}
.ptable th,.ptable td{text-align:left;padding:1rem 1rem 1rem 0;border-bottom:1px solid var(--line);vertical-align:baseline}
.ptable th{width:150px;color:var(--accent);white-space:nowrap}
.ptable tr{transition:background .15s}
.ptable tr:hover{background:rgba(31,138,76,.05)}
.note{display:grid;grid-template-columns:auto 1fr;gap:1.2rem;align-items:start;padding:1.3rem 1.4rem;border-radius:var(--r2);background:var(--white);border:1px solid var(--line);font-size:.93rem;color:var(--ink-2)}
.note .mono{background:var(--ink);color:var(--lime);padding:.35rem .6rem;border-radius:4px;white-space:nowrap}

/* principe / applications */
.facts-list{border-top:1px solid var(--ink)}
.facts-list>div{display:grid;grid-template-columns:130px 1fr;gap:1rem;padding:1.1rem 0;border-bottom:1px solid var(--line)}
.facts-list dt{color:var(--accent);padding-top:.15rem}
.facts-list dd{color:var(--ink-2);font-size:.97rem}
.steps3{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.2rem,3vw,2.5rem)}
.steps3 li{border-top:1px solid var(--ink);padding-top:1.2rem}
.steps3 .mono{color:var(--accent)}
.steps3 p{margin-top:.8rem;color:var(--ink-2)}
.trio-img{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1rem,2vw,1.5rem);margin-top:clamp(2.5rem,5vw,4rem)}
.app-block{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.app-block.rev>div:first-child{order:2}
.app-imgs{display:grid;gap:clamp(.8rem,1.5vw,1.2rem);position:sticky;top:96px}
.app-block h2{margin-bottom:.6rem}
.ticks{list-style:none;margin-top:1.6rem;border-top:1px solid var(--line)}
.ticks li{padding:.9rem 0 .9rem 1.8rem;border-bottom:1px solid var(--line);position:relative;color:var(--ink-2)}
.ticks li:before{content:"";position:absolute;left:0;top:1.4rem;width:12px;height:1.5px;background:var(--accent)}

/* chaîne d'images (miniatures d'origine) */
.chain-wrap h2{margin-bottom:2rem}
.chain{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:clamp(1rem,2vw,1.5rem)}
.chain li{position:relative}
.chain li:not(:last-child):after{content:"";position:absolute;top:calc(50% - 32px);right:calc(-1*clamp(1rem,2vw,1.5rem));width:clamp(1rem,2vw,1.5rem);height:1px;background:var(--ink-3)}
.chain a{display:block;aspect-ratio:1;border-radius:var(--r);overflow:hidden;background:var(--paper-2);max-width:210px}
.chain img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease)}
.chain a:hover img{transform:scale(1.05)}
.chain .mono{display:block;margin-top:.8rem;color:var(--accent)}
.chain p{font-size:.92rem;color:var(--ink-2);margin-top:.15rem;line-height:1.4}

/* logos défilants */
.logos-band{padding:2.2rem 0;border-top:1px solid var(--line)}
.marquee{overflow:hidden;mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.track{display:flex;gap:4.5rem;width:max-content;animation:marq 40s linear infinite}
.track img{height:46px;width:auto;max-width:140px;object-fit:contain;filter:grayscale(1);mix-blend-mode:multiply;opacity:.7}
.marquee:hover .track{animation-play-state:paused}
@keyframes marq{to{transform:translateX(-50%)}}

/* PDF */
.pdfband{background:var(--dark);color:#fff;padding:var(--pad) 0}
.pdf-in{display:grid;grid-template-columns:minmax(240px,400px) 1fr;gap:clamp(2rem,6vw,6rem);align-items:center}
.pdf-cover{display:block;border-radius:var(--r);overflow:hidden;box-shadow:0 40px 80px -30px rgba(0,0,0,.7),0 0 0 1px var(--dline);transform:rotate(-2deg);transition:transform .7s var(--ease)}
.pdf-cover:hover{transform:rotate(0) scale(1.02)}
.pdf-in h2{max-width:22ch}
.pdf-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin:2rem 0 1rem}
.pdfband .btn.line{color:#fff;box-shadow:inset 0 0 0 1px var(--dline)}
.pdfband .btn.line:hover{box-shadow:inset 0 0 0 1px #fff}
.pdfband .dim{color:rgba(255,255,255,.45)}
.pdf-frame{border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;background:#fff;height:min(85vh,900px)}
.pdf-frame iframe{width:100%;height:100%;border:0}

/* références */
.partner{display:grid;grid-template-columns:180px 1fr 280px;gap:clamp(1.5rem,3vw,3rem);padding:2rem 0;border-top:1px solid var(--line);align-items:center}
.partner:last-child{border-bottom:1px solid var(--line)}
.partner>.mono{color:var(--accent);align-self:start;padding-top:.25rem}
.partner>p:not(.mono){color:var(--ink-2)}
.partner a{color:var(--accent);border-bottom:1px solid currentColor;word-break:break-all}
.plogos{display:flex;gap:1rem;justify-content:flex-end;align-items:center;flex-wrap:wrap}
.plogos img{height:60px;width:auto;max-width:130px;object-fit:contain;mix-blend-mode:multiply}
.refs{display:grid;grid-template-columns:1fr 1fr;gap:0 3rem}
.refs>div{padding:1.3rem 0;border-top:1px solid var(--line)}
.refs dt{color:var(--accent);margin-bottom:.4rem}
.refs dd{color:var(--ink-2)}
.yt{position:relative;display:block;width:100%;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:#000}
.yt img{width:100%;height:100%;object-fit:cover;opacity:.8;transition:opacity .3s}
.yt:hover img{opacity:1}
.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.play{position:absolute;top:50%;left:50%;width:72px;height:72px;margin:-36px 0 0 -36px;border-radius:50%;background:var(--lime);transition:transform .3s var(--ease)}
.play:after{content:"";position:absolute;top:50%;left:54%;transform:translate(-50%,-50%);border-left:17px solid var(--ink);border-top:10px solid transparent;border-bottom:10px solid transparent}
.yt:hover .play{transform:scale(1.08)}
.yt-t{position:absolute;left:1rem;bottom:1rem;color:#fff;text-align:left;text-shadow:0 1px 8px rgba(0,0,0,.6)}

/* contact */
.contact{display:grid;grid-template-columns:1.25fr 1fr;gap:clamp(2rem,6vw,6rem);align-items:start}
.form{display:grid;gap:1.1rem}
.form h2{margin-bottom:.5rem;font-size:clamp(1.4rem,2.2vw,1.9rem)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
.form label{display:grid;gap:.45rem;font-size:.86rem;font-weight:500;color:var(--ink-2)}
.form input,.form textarea{font:inherit;font-size:1rem;color:var(--ink);padding:.85rem 1rem;border:1px solid var(--line);border-radius:var(--r);background:var(--white);transition:border-color .2s,box-shadow .2s;resize:vertical}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(31,138,76,.12)}
.form .btn{justify-self:start;margin-top:.3rem}
.thanks{color:var(--accent);font-weight:500}
.coords{border-top:1px solid var(--ink)}
.coords>div{padding:1.15rem 0;border-bottom:1px solid var(--line)}
.coords .mono{margin-bottom:.3rem}
.coords a{border-bottom:1px solid var(--line)}
.map{width:100%;height:240px;border:0;border-radius:var(--r);margin-top:1.4rem;filter:grayscale(.6)}

/* pagination entre pages */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:1rem;padding:2.5rem 0;border-top:1px solid var(--line)}
.pg{display:flex;flex-direction:column;gap:.3rem;padding:1.2rem 1.4rem;border-radius:var(--r2);border:1px solid var(--line);transition:border-color .2s,background .2s}
.pg:hover{border-color:var(--ink);background:var(--white)}
.pg strong{font-weight:500;font-size:1.1rem;letter-spacing:-.02em}
.pg .mono{transition:transform .3s var(--ease);display:inline-block}
.pg.next{text-align:right;align-items:flex-end;grid-column:2}

/* pied de page */
.foot{background:var(--dark);color:rgba(255,255,255,.7);padding:clamp(3.5rem,7vw,5.5rem) 0 2rem;font-size:.92rem}
.foot-top{display:flex;justify-content:space-between;align-items:flex-end;gap:2rem;flex-wrap:wrap;padding-bottom:clamp(2.5rem,5vw,4rem);border-bottom:1px solid var(--dline)}
.foot-mail{display:block;color:#fff;font-size:clamp(1.5rem,3.6vw,3rem);letter-spacing:-.035em;margin-top:.6rem;transition:color .2s}
.foot-mail:hover{color:var(--lime)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:2rem;padding-top:3rem}
.foot .brand{color:#fff;margin-bottom:1rem}
.foot .dim{color:rgba(255,255,255,.42);line-height:1.8}
.foot ul{list-style:none;display:grid;gap:.5rem;margin-top:1rem}
.foot ul a:hover{color:#fff}
.foot-b{display:flex;justify-content:space-between;align-items:center;margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--dline);font-size:.82rem;color:rgba(255,255,255,.45)}
.foot .lang{box-shadow:inset 0 0 0 1px var(--dline)}
.foot .lang a[aria-current]{background:#fff;color:var(--ink)}

/* visionneuse */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(8,14,12,.94);display:flex;align-items:center;justify-content:center;padding:4vw;backdrop-filter:blur(6px);animation:fade .25s}
.lightbox[hidden]{display:none}
.lightbox figure{max-width:min(1200px,90vw);text-align:center}
.lightbox img{max-height:80vh;width:auto;margin:auto;border-radius:var(--r)}
.lightbox figcaption{color:rgba(255,255,255,.7);margin-top:1rem;font-size:.92rem}
.lightbox button{position:absolute;color:#fff;font-size:1.6rem;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.08);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18)}
.lightbox button:hover{background:rgba(255,255,255,.16)}
.lb-x{top:20px;right:20px}.lb-p{left:20px}.lb-n{right:20px}
@keyframes fade{from{opacity:0}}

/* apparitions au défilement */
.js .rv{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .rv.in{opacity:1;transform:none}
.js .rv-img{clip-path:inset(12% 0 0 0);transition:clip-path 1.2s var(--ease)}
.js .rv-img img{transform:scale(1.12);transition:transform 1.6s var(--ease)}
.js .rv-img.in{clip-path:inset(0)}
.js .rv-img.in img{transform:none}
.js .rv-img.in:hover img{transform:scale(1.04)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.js .rv,.hero-a{opacity:1;transform:none}.js .rv-img{clip-path:none}.js .rv-img img{transform:none}}

/* responsive */
@media (max-width:1100px){
  .top-cta{display:none}
  .burger{display:block}
  .menu{position:fixed;inset:var(--top) 0 0;margin:0;background:var(--paper);color:var(--ink);padding:1rem clamp(1.25rem,4vw,3rem) 2rem;overflow:auto;opacity:0;visibility:hidden;transform:translateY(-8px);transition:.25s var(--ease)}
  .menu-open .menu{opacity:1;visibility:visible;transform:none}
  .menu-open .top{background:var(--paper)!important;color:var(--ink)!important;backdrop-filter:none!important}
  .menu>ul{flex-direction:column;gap:0}
  .dd{border-bottom:1px solid var(--line)}
  .dd>button{width:100%;justify-content:space-between;height:60px;padding:0;font-size:1.15rem;border-radius:0;background:none!important;box-shadow:none!important}
  .dd>ul{position:static;min-width:0;box-shadow:none;border:0;padding:0 0 1rem;opacity:1;visibility:visible;transform:none;display:none;background:transparent}
  .dd.open>ul{display:block}
  .top .lang{margin-left:auto}
  .cases,.cases.all{grid-template-columns:1fr 1fr}
  .quad{grid-template-columns:1fr 1fr}
  .partner{grid-template-columns:1fr;gap:.8rem}.plogos{justify-content:flex-start}
  .foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}
  .range-card{grid-template-columns:1fr}.rc-img{aspect-ratio:16/9;min-height:0}
}
@media (max-width:760px){
  :root{--top:60px}
  body{font-size:16px}
  .brand span{display:none}
  .phead.has-img .phead-in,.split,.duo,.domains,.ranges,.intro,.nautic,.cmp-grid,.contact,.refs,.spec,.pdf-in,.app-block,.steps3,.trio-img{grid-template-columns:1fr}
  .app-block.rev>div:first-child{order:0}
  .app-imgs{position:static;grid-template-columns:1fr 1fr}
  .cases,.cases.all{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .facts p{padding:.9rem 0}.facts p+p{padding-left:0;border-left:0;border-top:1px solid var(--dline)}
  .specs{position:static}
  .ptable th{width:105px;white-space:normal}
  .form .row{grid-template-columns:1fr}
  .note{grid-template-columns:1fr}
  .chain{grid-template-columns:1fr 1fr}.chain li:after{display:none}
  .facts-list>div{grid-template-columns:1fr;gap:.3rem}
  .pdf-cover{max-width:280px}
  .shead{flex-direction:column;gap:.6rem}
  .pager{grid-template-columns:1fr}.pg.next{grid-column:1}
  .foot-b{flex-direction:column;gap:1rem;align-items:flex-start}
}

/* =========================================================
   v4 — identité « biologie » : fond microscope, oculaires,
   héros centré, parcours produit
   ========================================================= */
.microbes{position:absolute;inset:0;width:100%;height:100%;z-index:-2;display:block}

/* héros centré */
.hero{justify-content:center;background:radial-gradient(120% 90% at 50% 40%,#12261d 0%,#0b1712 55%,#070e0b 100%)}
.hero-shade{background:radial-gradient(60% 55% at 50% 45%,rgba(7,14,11,.15),rgba(7,14,11,.75) 100%)}
.hero-in{text-align:center;padding:10rem 0 7rem;display:flex;flex-direction:column;align-items:center}
.hero h1{max-width:15ch;margin-inline:auto;font-size:clamp(2.8rem,6.8vw,6rem);font-weight:450}
.hero-sub{font-size:clamp(1.15rem,2vw,1.6rem)}
.hero-cta{justify-content:center}
.kicker.center:after{content:"";width:22px;height:1px;background:currentColor}
.hero-facts{position:absolute;left:0;right:0;bottom:0}
.facts p{display:flex;gap:.9rem;align-items:baseline}
.facts .mono{color:var(--lime)}

/* en-têtes de page sombres */
.phead{position:relative;isolation:isolate;background:radial-gradient(120% 120% at 80% 0%,#14291f,#0b1712 60%);color:#fff;border-bottom:0}
.phead .lead{color:rgba(255,255,255,.72)}
.phead .lead strong{color:#fff}
.phead .crumb{color:rgba(255,255,255,.5)}
.phead .crumb a:hover{color:#fff}
.phead .crumb [aria-current]{color:var(--lime)}
.phead-img{border-radius:var(--r2);box-shadow:0 30px 60px -30px rgba(0,0,0,.8),0 0 0 1px rgba(255,255,255,.08)}
.inner .top{background:rgba(247,246,242,.96)}

/* titres de section numérotés */
.stitle{display:grid;grid-template-columns:80px 1fr;gap:1rem;margin-bottom:clamp(2rem,4vw,3.2rem);border-top:1px solid var(--line);padding-top:1.2rem}
.stitle .num{color:var(--accent);padding-top:.5rem}
.stitle h2{max-width:24ch}
.stitle p{color:var(--ink-2);margin-top:.9rem;max-width:62ch}
.dark .stitle{border-color:var(--dline)}.dark .stitle .num{color:var(--lime)}.dark .stitle p{color:rgba(255,255,255,.65)}

/* section biologie : papier vert pâle + trame cellulaire */
.sec.bio{background:#eef3ec url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cg fill='none' stroke='%231f8a4c' stroke-opacity='.07'%3E%3Ccircle cx='20' cy='24' r='9'/%3E%3Ccircle cx='86' cy='70' r='14'/%3E%3Crect x='52' y='14' width='26' height='9' rx='4.5' transform='rotate(25 65 18)'/%3E%3Ccircle cx='34' cy='96' r='5'/%3E%3C/g%3E%3C/svg%3E")}

/* le problème */
.problem{display:grid;gap:2.5rem}
.problem .big{max-width:34ch}
.problem-imgs{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1rem,2vw,1.5rem)}

/* oculaires de microscope */
.lens{margin:0;text-align:center}
.lens-in{position:relative;display:block;aspect-ratio:1;border-radius:50%;overflow:hidden;background:#0b1712;box-shadow:0 0 0 8px #fff,0 0 0 9px rgba(12,21,18,.14),0 30px 60px -30px rgba(12,21,18,.55)}
.lens-in img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);transition:transform 1.4s var(--ease)}
.lens-in:hover img{transform:scale(1.18)}
.lens-in:after{content:"";position:absolute;inset:0;border-radius:50%;pointer-events:none;
  background:linear-gradient(rgba(255,255,255,.55),rgba(255,255,255,.55)) 50% 8%/1px 9% no-repeat,
             linear-gradient(rgba(255,255,255,.55),rgba(255,255,255,.55)) 50% 92%/1px 9% no-repeat,
             linear-gradient(90deg,rgba(255,255,255,.55),rgba(255,255,255,.55)) 8% 50%/9% 1px no-repeat,
             linear-gradient(90deg,rgba(255,255,255,.55),rgba(255,255,255,.55)) 92% 50%/9% 1px no-repeat,
             radial-gradient(circle,transparent 62%,rgba(0,0,0,.35) 100%)}
.lens figcaption{margin:1.2rem auto 0;max-width:30ch;color:var(--ink-3);text-transform:none;letter-spacing:0;font-size:.78rem;line-height:1.45}

/* le produit */
.product{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(2.5rem,6vw,6rem);align-items:center}
.lenses{display:grid;grid-template-columns:1fr 1fr;gap:2.2rem 2rem;align-items:start}
.lenses .l1{grid-column:1/-1;width:58%;margin-inline:auto}
.stat{display:flex;align-items:baseline;gap:.9rem;flex-wrap:wrap;margin-bottom:1.2rem}
.stat strong{font-size:clamp(4rem,9vw,7rem);font-weight:450;letter-spacing:-.05em;line-height:.9;color:var(--accent)}
.stat span{font-size:1.05rem;max-width:16ch;color:var(--ink);line-height:1.3}
.badge-line{display:flex;gap:.9rem;align-items:center;margin-top:1.4rem;font-size:.9rem;color:var(--ink-2)}
.badge-line .mono{background:var(--ink);color:var(--lime);padding:.35rem .6rem;border-radius:4px;white-space:nowrap}

/* rail horizontal d'épandage */
.rail{display:flex;gap:clamp(1rem,2vw,1.5rem);overflow-x:auto;scroll-snap-type:x mandatory;padding:0 max(clamp(1.25rem,4vw,3rem),(100% - 1240px)/2) 1rem;scrollbar-width:thin}
.rail-i{flex:0 0 clamp(260px,32vw,440px);scroll-snap-align:start;margin:0}
.rail-i a{display:block;aspect-ratio:4/3;border-radius:var(--r);overflow:hidden;background:var(--paper-2)}
.rail-i img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease)}
.rail-i a:hover img{transform:scale(1.05)}
.rail-i figcaption{display:flex;gap:.8rem;margin-top:.8rem;font-size:.92rem;color:var(--ink-2)}
.rail-i .mono{color:var(--accent)}

/* comparateur à onglets */
.bav-tabs{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem}
.bav-tabs button{height:36px;padding:0 1rem;border-radius:999px;font-size:.86rem;color:rgba(255,255,255,.75);box-shadow:inset 0 0 0 1px var(--dline);transition:.2s}
.bav-tabs button:hover{color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.4)}
.bav-tabs button.on{background:var(--lime);color:var(--ink);box-shadow:none}
.bav .cmp-box{aspect-ratio:16/9;max-height:72vh;width:100%}
.bav .cmp-box img{transition:opacity .4s}
.bav.swap .cmp-box img{opacity:0}

/* gammes */
.range-card{grid-template-columns:200px 1fr;align-items:center}
.rc-lens{margin:1.5rem;aspect-ratio:1;border-radius:50%;overflow:hidden;box-shadow:0 0 0 6px #fff,0 0 0 7px var(--line)}
.rc-lens img{width:100%;height:100%;object-fit:cover;transform:scale(1.1);transition:transform 1.2s var(--ease)}
.range-card:hover .rc-lens img{transform:scale(1.22)}
.range-visuals{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(2rem,5vw,4rem);align-items:center}
.lens.big .lens-in{max-width:420px;margin-inline:auto}

@media (max-width:1100px){
  .product{grid-template-columns:1fr}
  .range-card{grid-template-columns:150px 1fr}
}
@media (max-width:760px){
  .hero-in{padding:7rem 0 12rem}
  .problem-imgs{grid-template-columns:1fr 1fr}.problem-imgs .ph:last-child{display:none}
  .stitle{grid-template-columns:1fr;gap:.3rem}
  .lenses{gap:1.6rem 1rem}
  .range-card{grid-template-columns:1fr}.rc-lens{width:60%;margin:1.5rem auto 0}
  .range-visuals{grid-template-columns:1fr}
  .bav .cmp-box{aspect-ratio:4/3}
}