:root{color-scheme:light}
[hidden]{display:none!important}
img{max-width:100%}

/* Concept : site vitrine d'une page, en-tête fixe, hero sur fond bleu marine, sections alternées blanc / bleu pâle, une seule zone sombre forte (hero + consultation). */
:root{
  --navy:#0B2447; --blue:#19376D; --sky:#7FB2E5; --bg:#FFFFFF; --bg2:#F1F5FA; --fg:#14213A; --muted:#51607A;
  --line:#D6DFEB; --card:#FFFFFF; --hero-bg:#0B2447; --hero-fg:#FFFFFF; --hero-muted:#B9C9E3; --accent:#19376D; --accent-fg:#FFFFFF; --warn-bg:#FFF4DC; --warn-fg:#6B4A00;
  --display:"Instrument Serif",Georgia,"Times New Roman",serif; --sans:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0A1628; --bg2:#0F1E36; --fg:#E7EEF9; --muted:#9FB0CB; --line:#243653; --card:#12233F; --hero-bg:#07111F; --accent:#7FB2E5; --accent-fg:#07111F; --warn-bg:#3A2D0B; --warn-fg:#F2D28B; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0A1628; --bg2:#0F1E36; --fg:#E7EEF9; --muted:#9FB0CB; --line:#243653; --card:#12233F; --hero-bg:#07111F; --accent:#7FB2E5; --accent-fg:#07111F; --warn-bg:#3A2D0B; --warn-fg:#F2D28B; color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:16px;line-height:1.6;margin:0;padding-inline:0}
h1,h2,h3{font-family:var(--display);font-weight:400;line-height:1.1;margin:0;text-wrap:balance}
h2{font-size:clamp(2rem,5vw,3rem)}
h3{font-size:1.45rem}
p{margin:0}
a{color:inherit}
.wrap{max-width:1080px;margin-inline:auto;padding-inline:20px}
section{padding-block:72px}
.alt{background:var(--bg2)}
.eyebrow{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:14px}
.lead{color:var(--muted);max-width:62ch;margin-top:16px;font-size:1.05rem}
.logo{height:42px;width:auto;display:block}
.hero-grid{display:grid;gap:36px;grid-template-columns:1fr;align-items:center}
.hero-text{min-width:0}
.seal{margin:0;text-align:center;position:relative;z-index:1}
.seal img{width:min(240px,70%);height:auto;border-radius:50%;box-shadow:0 10px 40px rgba(0,0,0,.35)}
.seal figcaption{font-size:.78rem;color:var(--hero-muted);margin-top:12px;letter-spacing:.1em;text-transform:uppercase}
.art{display:block;aspect-ratio:4/3;object-fit:cover;width:calc(100% + 52px);max-width:none;height:auto;margin:-26px -26px 20px}
.art-card{overflow:hidden;display:flex;flex-direction:column}
.art-card .art{flex:0 0 auto}
.art-card .art.grow{flex:1 1 auto}
.art.full{aspect-ratio:760/935;object-fit:contain;flex:none;background:var(--bg2)}
.refs-label{margin-top:28px;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
.refs{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:12px 0 0;padding:0}
.refs li{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:8px 16px;font-size:.92rem}
/* en-tête */
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--hero-bg);color:var(--hero-fg);border-bottom:1px solid rgba(255,255,255,.12)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;letter-spacing:.08em;font-size:.95rem}
.brand svg{width:34px;height:34px;flex:none}
nav ul{display:flex;gap:20px;list-style:none;margin:0;padding:0}
nav a{text-decoration:none;font-size:.9rem;color:var(--hero-muted)}
nav a:hover,nav a:focus-visible{color:#fff}
.menu-btn{display:none;background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35);border-radius:6px;padding:8px 12px;font:inherit;font-size:.9rem;cursor:pointer}
@media (max-width:860px){
  .menu-btn{display:block}
  nav{position:absolute;left:0;right:0;top:100%;background:var(--hero-bg);display:none;border-bottom:1px solid rgba(255,255,255,.12)}
  nav.open{display:block}
  nav ul{flex-direction:column;gap:0;padding:8px 20px 16px}
  nav a{display:block;padding:12px 0;font-size:1rem}
}
/* hero */
.hero{background:var(--hero-bg);color:var(--hero-fg);padding-block:72px 64px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:460px;height:460px;border-radius:50%;border:1px solid rgba(127,178,229,.25);box-shadow:0 0 0 60px rgba(127,178,229,.05),0 0 0 120px rgba(127,178,229,.03);pointer-events:none}
.hero .eyebrow{color:var(--sky)}
.hero h1{font-size:clamp(2.6rem,8vw,5.2rem);letter-spacing:.01em}
.hero .sub{font-size:clamp(1.1rem,2.6vw,1.45rem);margin-top:18px;max-width:34ch;color:#fff}
.hero .sig{margin-top:12px;color:var(--sky);font-style:italic;font-family:var(--display);font-size:1.25rem}
.hero .txt{margin-top:22px;max-width:60ch;color:var(--hero-muted)}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{display:inline-block;padding:13px 22px;border-radius:6px;text-decoration:none;font-weight:600;font-size:.95rem;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn.primary{background:#fff;color:var(--navy)}
.btn.ghost{border-color:rgba(255,255,255,.45);color:#fff;background:transparent}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.trust{background:var(--blue);color:#fff}
.trust ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px 28px;list-style:none;margin:0;padding:16px 0;font-size:.9rem}
.trust li{display:flex;gap:10px;align-items:baseline}
.trust li::before{content:"";width:7px;height:7px;background:var(--sky);border-radius:50%;flex:none;transform:translateY(-1px)}
/* grilles */
.grid{display:grid;gap:20px;margin-top:36px;grid-template-columns:repeat(auto-fit,minmax(min(100%,290px),1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:26px;min-width:0}
.card p{color:var(--muted);margin-top:10px;font-size:.97rem}
.card ul{margin:12px 0 0;padding-left:18px;color:var(--muted);font-size:.95rem}
.card li+li{margin-top:4px}
.tag{display:inline-block;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:10px}
.split{display:grid;gap:40px;grid-template-columns:1fr;align-items:start}
@media (min-width:860px){.split{grid-template-columns:1fr 1fr}}
.notice{background:var(--warn-bg);color:var(--warn-fg);border-radius:8px;padding:14px 16px;font-size:.92rem;margin-top:24px}
.steps{counter-reset:s;list-style:none;margin:36px 0 0;padding:0;display:grid;gap:0;border-top:1px solid var(--line)}
.steps li{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:12px;padding:18px 0;border-bottom:1px solid var(--line)}
.steps li::before{content:counter(s);font-family:var(--display);font-size:1.9rem;color:var(--accent);line-height:1}
.steps strong{display:block}
.steps span{color:var(--muted);font-size:.95rem}
.why{display:grid;gap:0 40px;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));margin-top:32px}
.why div{padding:16px 0;border-top:1px solid var(--line)}
.why b{display:block;margin-bottom:4px}
.why span{color:var(--muted);font-size:.95rem}
/* consultation */
.consult{background:var(--hero-bg);color:var(--hero-fg)}
.consult .eyebrow{color:var(--sky)}
.consult .lead{color:var(--hero-muted)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{border:1px solid rgba(255,255,255,.35);background:transparent;color:#fff;border-radius:999px;padding:9px 16px;font:inherit;font-size:.9rem;cursor:pointer}
.chip[aria-pressed="true"]{background:#fff;color:var(--navy);border-color:#fff}
form{display:grid;gap:16px;margin-top:28px;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.full{grid-column:1/-1}
label{display:block;font-size:.85rem;margin-bottom:6px;color:var(--hero-muted)}
input,select,textarea{width:100%;font:inherit;padding:12px 14px;border-radius:6px;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.07);color:#fff}
select option{color:#14213A}
textarea{min-height:130px;resize:vertical}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.88rem;color:var(--hero-muted)}
.check input{width:auto;margin-top:4px}
.status{grid-column:1/-1;background:var(--warn-bg);color:var(--warn-fg);border-radius:8px;padding:14px 16px;font-size:.93rem}
/* contact */
.contact dl{display:grid;gap:18px 40px;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));margin:32px 0 0}
.contact dt{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
.contact dd{margin:4px 0 0;overflow-wrap:anywhere}
.copy{margin-left:8px;font:inherit;font-size:.78rem;border:1px solid var(--line);background:transparent;color:var(--fg);border-radius:4px;padding:2px 8px;cursor:pointer}
footer{background:var(--hero-bg);color:var(--hero-muted);padding-block:36px;font-size:.85rem}
footer .wrap{display:grid;gap:10px}
footer b{color:#fff}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.status.ok{background:rgba(127,178,229,.22);color:#fff}