/* A2TECH V3 — sans dépendances externes */
:root{--ink:#162c3a;--navy:#0e2636;--navy2:#18394a;--teal:#287a89;--teal-br:#acd6d7;--warm:#eead77;--cream:#fbfaf6;--mist:#eef5f3;--paper:#fff;--muted:#526976;--line:#dce8e7;--shadow:0 18px 70px rgba(15,49,67,.11);--round:24px;--wrap:1160px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;background:var(--cream);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}img,svg{max-width:100%}p{margin:0 0 1em}h1,h2,h3{line-height:1.11;letter-spacing:-.045em;margin:0 0 .6em;font-weight:780}h1{font-size:clamp(2.55rem,5.8vw,5.3rem);letter-spacing:-.06em}h2{font-size:clamp(2.05rem,4vw,3.45rem)}h3{font-size:1.25rem;letter-spacing:-.035em}.container{max-width:var(--wrap);padding:0 24px;margin:auto}.icon{width:22px;height:22px;flex-shrink:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;z-index:200;left:20px;top:-100px;background:#fff;padding:12px 16px;border-radius:10px}.skip:focus{top:16px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #dd914d;outline-offset:3px}.eyebrow{font-size:.76rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);display:inline-flex;align-items:center;gap:8px}.eyebrow::before{content:"";height:2px;width:25px;background:var(--warm)}.eyebrow.light{color:#b9e9e9}.lead{font-size:clamp(1.05rem,1.6vw,1.18rem);line-height:1.8;color:var(--muted);max-width:650px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:12px 22px;border:1px solid transparent;border-radius:13px;font-size:.95rem;font-weight:750;transition:background .2s,transform .2s,box-shadow .2s;text-align:center}.btn .icon{width:18px;height:18px}.btn:hover{transform:translateY(-2px)}.btn-accent{background:var(--warm);color:#142a38;box-shadow:0 10px 24px rgba(237,171,117,.18)}.btn-accent:hover{background:#f6bc8a}.btn-dark{background:var(--navy);color:#fff}.btn-dark:hover{background:#24475a}.btn-outline{border-color:#bad1d5;color:var(--ink);background:rgba(255,255,255,.6)}.btn-outline:hover{background:#fff}.btn-outline-light{border-color:#7297a5;color:#fff}.btn-outline-light:hover{background:rgba(255,255,255,.08)}.arrow-link{color:var(--teal);font-weight:780;display:inline-flex;align-items:center;gap:6px}.arrow-link .icon{width:18px;height:18px;transition:transform .2s}.arrow-link:hover .icon{transform:translateX(4px)}
/* en-tête */
.top-note{background:#09212e;color:#cee6e7;font-size:.75rem}.top-note .container{display:flex;gap:14px;justify-content:space-between;align-items:center;min-height:34px}.top-note a{text-decoration:underline;text-decoration-color:#668c98;text-underline-offset:3px}.site-header{position:sticky;top:0;z-index:100;background:rgba(251,250,246,.97);backdrop-filter:blur(16px);border-bottom:1px solid rgba(151,180,187,.24)}.header-bar{height:78px;display:flex;gap:26px;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px;min-width:208px;line-height:1}.brand img{width:48px;height:48px;flex:none}.brand-name{font-size:1.43rem;font-weight:900;letter-spacing:-.045em;color:var(--navy)}.brand-name span{color:var(--teal)}.brand-sub{font-size:.64rem;color:var(--muted);letter-spacing:.13em;font-weight:800;text-transform:uppercase;margin-top:6px}.nav{display:flex;align-items:center;gap:24px}.nav a{font-size:.91rem;font-weight:680;transition:color .2s}.nav a:hover,.nav a[aria-current=page]{color:var(--teal)}.nav-cta{display:flex;gap:12px;align-items:center}.nav-cta .btn{min-height:44px;padding:9px 15px}.menu-toggle{display:none;align-items:center;justify-content:center;background:#edf4f2;border:0;border-radius:11px;width:45px;height:45px}.menu-bars{height:17px;width:19px;display:flex;flex-direction:column;justify-content:space-between}.menu-bars span{height:2px;width:100%;background:var(--ink);transition:transform .2s,opacity .2s}
/* héro */
.hero{overflow:hidden;background:linear-gradient(140deg,#0c2634 0%,#1b4155 72%,#1b5360 100%);position:relative;color:#fff}.hero::after{content:"";position:absolute;right:-260px;bottom:-300px;width:680px;height:680px;background:radial-gradient(circle,#3c8392 0%,transparent 65%);opacity:.35;pointer-events:none}.hero-inner{position:relative;display:grid;grid-template-columns:1.04fr 1fr;align-items:center;min-height:604px;gap:14px;z-index:1;padding-top:52px;padding-bottom:52px}.hero-copy{padding-bottom:10px}.hero h1{max-width:650px;margin-top:24px;margin-bottom:20px}.hero h1 em{font-style:normal;color:#b6e4df}.hero p{max-width:520px;color:#d3e5e9;font-size:1.07rem;line-height:1.8}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 34px}.hero-trust{display:flex;gap:20px;align-items:center;flex-wrap:wrap;color:#d6e8e9;font-size:.8rem}.hero-trust span{display:flex;align-items:center;gap:7px}.hero-trust .icon{width:17px;height:17px;color:#efb680}.hero-visual{position:relative;max-width:640px;transform:translateX(22px)}.hero-visual img{width:100%;height:auto;display:block;filter:drop-shadow(0 16px 40px rgba(0,0,0,.12))}.hero-badge{position:absolute;right:2%;top:7%;display:flex;align-items:center;gap:10px;max-width:190px;padding:12px 15px;border-radius:16px;background:rgba(10,33,46,.65);border:1px solid rgba(195,235,237,.22);backdrop-filter:blur(10px);font-size:.81rem}.hero-badge strong{display:block;color:#fff}.hero-badge small{color:#c6e2e4}
/* sections */
.section{padding:90px 0}.section-tight{padding:62px 0}.section-header{max-width:760px;margin-bottom:36px}.section-header h2{margin:12px 0 18px}.surface{background:var(--paper)}.pale{background:var(--mist)}.dark-section{background:var(--navy);color:#fff}.dark-section .lead{color:#c6d9de}.cards-3,.cards-4,.cards-2{display:grid;gap:18px}.cards-3{grid-template-columns:repeat(3,minmax(0,1fr))}.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}.cards-2{grid-template-columns:repeat(2,minmax(0,1fr))}.card{background:#fff;border:1px solid var(--line);border-radius:var(--round);padding:28px;box-shadow:0 6px 25px rgba(16,48,64,.025)}.card h3{margin:16px 0 10px}.card p{color:var(--muted);font-size:.93rem}.card .arrow-link{margin-top:10px}.card-icon{width:53px;height:53px;border-radius:15px;display:grid;place-items:center;background:#e5f4f3;color:var(--teal)}.card-icon.warm{background:#fff0e1;color:#bd7240}.service-card{display:flex;flex-direction:column}.service-card .arrow-link{margin-top:auto;padding-top:16px}.need-card{position:relative;overflow:hidden;min-height:290px;display:flex;flex-direction:column}.need-card::after{content:"";position:absolute;right:-45px;top:-45px;width:135px;height:135px;border:1px solid #dfebe9;border-radius:50%}.need-card .btn{margin-top:auto;align-self:start}.need-card h3{font-size:1.55rem}.need-card p{max-width:270px}.need-card .tag{color:#4d8191;font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;margin:5px 0 5px}.need-card.dark-card{background:#153749;color:#fff;border-color:#153749}.need-card.dark-card .tag,.need-card.dark-card p{color:#c5e0e2}.need-card.dark-card .card-icon{background:#315365;color:#e5f9f5}.need-card.dark-card::after{border-color:#3d5d6b}.need-card.dark-card .btn{background:#eab080;color:#152735}
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:68px}.split-visual{background:linear-gradient(145deg,#dbeee9,#b4d6d8);min-height:440px;padding:50px;border-radius:32px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.split-visual::before,.split-visual::after{content:"";position:absolute;border:1px solid rgba(20,69,85,.15);border-radius:50%;width:430px;height:430px}.split-visual::after{width:320px;height:320px}.split-visual .big-icon{width:180px;height:180px;stroke:#245a6b;stroke-width:.9;z-index:1}.feature-list{list-style:none;padding:0;margin:26px 0;display:grid;gap:17px}.feature-list li{display:flex;gap:12px;align-items:flex-start}.feature-list li .icon{color:#2e8591;width:22px;margin-top:1px}.steps{counter-reset:steps;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{counter-increment:steps;padding:30px;background:#fff;border:1px solid var(--line);border-radius:22px}.step::before{content:"0" counter(steps);color:var(--teal);display:block;font-size:1.8rem;font-weight:820;letter-spacing:-.05em;margin-bottom:16px}.step p{color:var(--muted);font-size:.93rem}.place-line{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.place-line span{border-radius:100px;background:#fff;border:1px solid #d0e3e3;padding:7px 13px;font-size:.86rem;font-weight:600}.callout{padding:35px 42px;border-radius:24px;background:linear-gradient(120deg,#153849,#27586c);color:white;display:flex;justify-content:space-between;align-items:center;gap:25px}.callout h2{font-size:clamp(1.55rem,3vw,2.35rem);margin:.15em 0}.callout p{color:#cee4e7;margin:0}.callout .btn{flex-shrink:0}
/* pages intérieures */
.page-hero{background:linear-gradient(140deg,#112c3e,#205065);color:white;padding:80px 0 90px;position:relative;overflow:hidden}.page-hero::after{content:"";width:460px;height:460px;border:1px solid rgba(255,255,255,.14);border-radius:50%;position:absolute;right:-160px;top:-150px;box-shadow:0 0 0 90px rgba(255,255,255,.025),0 0 0 180px rgba(255,255,255,.025)}.page-hero .container{position:relative;z-index:1}.page-hero h1{max-width:850px;margin-top:22px;margin-bottom:18px;font-size:clamp(2.4rem,5vw,4.3rem)}.page-hero p{max-width:700px;font-size:1.11rem;color:#d1e6e6}.page-hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.breadcrumbs{font-size:.8rem;color:#c8e1e3;display:flex;gap:8px}.breadcrumbs a{text-decoration:underline;text-underline-offset:4px}.prose{max-width:760px}.prose h2{margin:34px 0 15px;font-size:1.75rem}.prose p{color:var(--muted)}.prose a:not(.btn){color:var(--teal);text-decoration:underline}.panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px}.info-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:26px}.info-grid .prose{max-width:700px}.list-check{list-style:none;padding:0;display:grid;gap:12px}.list-check li{display:flex;align-items:flex-start;gap:10px}.list-check .icon{color:var(--teal);margin-top:3px}.muted{color:var(--muted)}.faq{max-width:820px;margin:auto}.faq details{background:#fff;margin:10px 0;padding:0 22px;border-radius:16px;border:1px solid var(--line)}.faq summary{padding:20px 0;font-size:1.02rem;line-height:1.4;font-weight:720;cursor:pointer}.faq details[open]{box-shadow:0 14px 35px rgba(25,70,82,.06)}.faq details p{padding-bottom:20px;color:var(--muted);margin:0}
/* simulateur */
.sim-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:start}.sim-panel{padding:38px;background:#fff;border:1px solid var(--line);border-radius:24px}.sim-panel h2,.sim-result h2{font-size:1.7rem}.question{margin-bottom:25px}.question h3{font-size:1rem;letter-spacing:-.01em;margin:0 0 12px}.choice-group{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.choice-group label{cursor:pointer;position:relative}.choice-group input{position:absolute;opacity:0;width:1px;height:1px}.choice-group span{min-height:54px;display:flex;align-items:center;padding:12px 14px;border:1px solid #d7e4e5;border-radius:12px;background:#f9fcfb;font-size:.9rem;font-weight:650;transition:.2s}.choice-group input:checked+span{background:#e5f2ef;border:2px solid var(--teal);padding:11px 13px;color:#194c55}.choice-group input:focus-visible+span{outline:3px solid #eaaa6a;outline-offset:2px}.sim-result{position:sticky;top:113px;padding:35px;border-radius:24px;color:white;background:linear-gradient(135deg,#143447,#246174)}.sim-result p{color:#d1e7e6}.sim-result ul{padding-left:20px;color:#e3f3f2}.sim-result .btn{margin-top:16px}.sim-disclaimer{font-size:.82rem;color:#c2dbdc;margin-top:20px}
/* formulaire */
.contact-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:24px}.contact-form{background:#fff;border:1px solid var(--line);border-radius:24px;padding:36px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:18px}.field label{font-weight:730;font-size:.9rem}.field input,.field select,.field textarea{width:100%;min-height:49px;padding:11px 13px;background:#f9fcfb;border:1px solid #cbdcdd;border-radius:12px;color:var(--ink)}.field textarea{min-height:130px;resize:vertical}.field small{color:var(--muted)}.field input:focus,.field select:focus,.field textarea:focus{border-color:#3a8992;outline:2px solid #d0eaea}.checkboxline{display:flex;gap:10px;font-size:.86rem;color:var(--muted);align-items:flex-start}.checkboxline input{margin-top:5px;accent-color:var(--teal)}.checkboxline a{text-decoration:underline}.form-status{margin-top:16px;padding:14px;border-radius:12px;background:#eaf5f3;color:#173e4e;display:none;white-space:pre-wrap}.form-status.visible{display:block}.contact-box{padding:30px;background:var(--navy);border-radius:24px;color:#fff}.contact-box p{color:#d2e6e6}.contact-item{display:flex;gap:12px;margin-top:25px;align-items:flex-start}.contact-item .icon{color:var(--warm)}.contact-item a{text-decoration:underline;text-decoration-color:#84aaa9;text-underline-offset:3px}.tiny{font-size:.82rem}.footer{padding:65px 0 22px;background:#0a2431;color:#c7dcde}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:45px}.footer .brand-name{color:#fff}.footer .brand-sub{color:#acc8cc}.footer h3{font-size:1rem;color:#fff;letter-spacing:0}.footer a:hover{text-decoration:underline;text-underline-offset:4px}.footer-links{list-style:none;padding:0;display:grid;gap:8px;font-size:.9rem}.footer-copy{border-top:1px solid rgba(255,255,255,.15);margin-top:45px;padding-top:22px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:.75rem;color:#a5c0c5}.footer-copy a{text-decoration:underline}.mobile-cta{display:none}
@media(max-width:1100px){.nav{gap:16px}.brand{min-width:180px}.nav-cta .btn{font-size:.83rem;padding:9px 12px}.hero-inner{min-height:560px}.cards-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:920px){.nav{position:fixed;z-index:110;inset:112px 0 auto 0;display:none;background:var(--cream);padding:24px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0;max-height:calc(100dvh - 112px);overflow:auto}.nav.open{display:flex}.nav a{font-size:1.1rem;padding:13px 5px;border-bottom:1px solid var(--line)}.menu-toggle{display:flex}.nav-cta .btn{display:none}.header-bar{height:70px}.nav{top:104px}.hero-inner{grid-template-columns:1fr 1fr;min-height:0}.hero h1{font-size:clamp(2.25rem,5vw,3.9rem)}.hero-visual{transform:none}.split{gap:28px}.section{padding:70px 0}.cards-3{grid-template-columns:repeat(2,minmax(0,1fr))}.cards-3 .need-card:last-child{grid-column:1/-1}.sim-layout,.contact-layout{grid-template-columns:1fr}.sim-result{position:static}}
@media(max-width:660px){html{scroll-padding-top:76px}.container{padding:0 18px}.top-note{display:none}.header-bar{height:68px}.brand{min-width:auto}.brand img{height:43px;width:43px}.brand-name{font-size:1.24rem}.brand-sub{font-size:.57rem}.nav{top:68px;max-height:calc(100dvh - 68px)}.hero-inner{grid-template-columns:1fr;padding-top:58px;padding-bottom:38px}.hero h1{font-size:clamp(2.65rem,11vw,4.45rem);margin-top:16px}.hero p{font-size:1rem}.hero-visual{max-width:390px;margin:-10px auto -40px}.hero-badge{right:0;top:0}.hero-trust{gap:11px}.hero-actions{margin:22px 0}.section{padding:58px 0}.section-tight{padding:46px 0}.section-header{margin-bottom:25px}.cards-2,.cards-3,.cards-4,.steps,.split,.info-grid{grid-template-columns:1fr}.cards-3 .need-card:last-child{grid-column:auto}.card{padding:25px}.need-card{min-height:260px}.split-visual{min-height:280px;padding:24px}.split-visual .big-icon{height:140px;width:140px}.callout{padding:25px;flex-direction:column;align-items:flex-start}.callout .btn{width:100%}.page-hero{padding:52px 0 58px}.page-hero h1{font-size:clamp(2.35rem,10vw,3.3rem)}.page-hero p{font-size:1rem}.sim-panel,.sim-result,.contact-form{padding:24px}.form-grid{grid-template-columns:1fr;gap:0}.choice-group{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:30px}.footer{padding:50px 0 88px}.footer-copy{margin-top:28px}.mobile-cta{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:90;padding:9px max(14px,env(safe-area-inset-right)) calc(9px + env(safe-area-inset-bottom)) max(14px,env(safe-area-inset-left));gap:9px;background:rgba(252,251,247,.98);box-shadow:0 -6px 25px rgba(13,48,63,.13)}.mobile-cta .btn{min-height:46px;padding:10px;flex:1;font-size:.88rem}.mobile-cta .btn:first-child{flex:.8}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* identité visuelle authentique */
.logo-presentation{width:100%;max-width:355px;height:auto;object-fit:contain;position:relative;z-index:1;filter:drop-shadow(0 14px 22px rgba(24,71,82,.09))}
/* A2TECH photo d'ambiance : bloc premium et responsive */
.hero-visual .hero-photo-wrap{position:relative;overflow:hidden;border-radius:26px;border:1px solid rgba(203,237,235,.45);box-shadow:0 28px 58px rgba(2,16,28,.32);background:#24495b}
.hero-visual .hero-photo-wrap img{display:block;width:100%;height:auto;aspect-ratio:5/4;object-fit:cover;filter:none;transform:scale(1.005)}
.hero-photo-wrap:after{content:"";position:absolute;inset:50% 0 0;background:linear-gradient(0deg,rgba(0,22,34,.67),transparent);pointer-events:none}
.hero-photo-credit{position:absolute;z-index:1;left:20px;right:20px;bottom:16px;font-size:.67rem;color:#ecf5f5;font-weight:500;line-height:1.4}
@media(max-width:650px){.hero-visual .hero-photo-wrap{border-radius:18px}.hero-photo-credit{font-size:.61rem;bottom:12px;left:12px;right:12px}}

/* Finitions V4 : mouvement discret, lisibilité et formulaire mobile */
.prepared-actions{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.prepared-message{display:block;width:100%;min-height:230px;padding:16px;border:1px solid #b7cecc;border-radius:12px;background:white;color:var(--ink);font:inherit;line-height:1.6;resize:vertical}
.card,.project-card{transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease}
@media(hover:hover){.card:hover,.project-card:hover{transform:translateY(-4px);border-color:#90b9ba;box-shadow:0 18px 40px rgba(15,49,67,.09)}}
@media(prefers-reduced-motion:no-preference){.hero-copy{animation:hero-enter .65s both}.hero-visual{animation:hero-enter .85s both}@keyframes hero-enter{from{opacity:0;translate:0 12px}to{opacity:1;translate:0 0}}}
@media(max-width:660px){.prepared-actions .btn{width:100%}.hero-visual{margin-bottom:0}.hero-photo-credit{font-size:.7rem}}