/* Altéra Studio — site public */
:root {
  --bg: #111317;
  --bg-2: #16191E;
  --panel: #1B1E24;
  --ligne: #2A2D35;
  --ligne-2: #3A3D46;
  --ink: #F3F1EC;
  --muted: #A9A69F;
  --or: #C8A26A;
  --or-clair: #E2C695;
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Manrope', system-ui, sans-serif;
  --max: 1240px;
  --r: 18px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans);
  font-size: 16px; line-height: 1.6; overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--or); }
a:hover { color: var(--or-clair); }
::selection { background: var(--or); color: var(--bg); }
:focus-visible { outline: 2px solid var(--or); outline-offset: 3px; border-radius: 4px; }

.conteneur { max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Grain subtil */
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 100; opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- En-tête ---------- */
.entete {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background .4s, border-color .4s, backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.entete.defile { background: rgba(17, 19, 23, .78); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-color: var(--ligne); }
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; height: 84px; gap: 24px; }
.marque { display: flex; align-items: center; gap: 14px; text-decoration: none; color: var(--ink); }
.marque:hover { color: var(--ink); }
.marque-ico { width: 50px; height: 50px; flex: none; filter: drop-shadow(0 0 6px rgba(212, 168, 103, .35)); }
.marque-mot { display: flex; flex-direction: column; line-height: 1; gap: 6px; }
.marque-mot b { font-family: 'Montserrat', var(--sans); font-weight: 300; font-size: 19px; letter-spacing: 6px; color: #F3E3C3; }
.marque-mot small { font-size: 9px; font-weight: 500; letter-spacing: 7px; color: var(--or); }
.nav { display: flex; align-items: center; gap: 34px; }
.nav a { color: var(--ink); text-decoration: none; font-size: 14px; letter-spacing: .3px; position: relative; padding: 6px 0; }
.nav a.btn { padding: 0 22px; color: var(--bg); }
.nav a:not(.btn)::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%; background: var(--or);
  transform: scaleX(0); transform-origin: right; transition: transform .35s ease;
}
.nav a:not(.btn):hover::after { transform: scaleX(1); transform-origin: left; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 50px; padding: 0 28px; border-radius: 999px; border: 1px solid var(--or);
  background: var(--or); color: var(--bg) !important; font: 600 15px/1 var(--sans); text-decoration: none;
  cursor: pointer; transition: background .25s, color .25s, transform .25s, border-color .25s;
}
.btn:hover { background: var(--or-clair); border-color: var(--or-clair); transform: translateY(-1px); }
.btn svg { width: 18px; height: 18px; transition: transform .25s; }
.btn:hover svg { transform: translateX(3px); }
.btn-ligne { background: transparent; color: var(--ink) !important; border-color: var(--ligne-2); }
.btn-ligne:hover { background: transparent; border-color: var(--or); }
.btn-petit { min-height: 44px; padding: 0 22px; font-size: 14px; }

.menu-btn {
  display: none; width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--ligne-2); background: transparent;
  color: var(--ink); cursor: pointer; place-items: center;
}
.menu-btn svg { width: 22px; height: 22px; }

/* Menu mobile */
.tiroir {
  position: fixed; inset: 0; z-index: 60; background: var(--bg); display: flex; flex-direction: column;
  padding: 24px 28px 40px; transform: translateY(-100%); transition: transform .5s cubic-bezier(.7, 0, .2, 1); visibility: hidden;
}
.tiroir.ouvert { transform: none; visibility: visible; }
.tiroir-haut { display: flex; justify-content: space-between; align-items: center; height: 60px; }
.tiroir nav { display: flex; flex-direction: column; gap: 8px; margin-top: 48px; }
.tiroir nav a { font-family: var(--serif); font-weight: 300; font-size: 44px; color: var(--ink); text-decoration: none; line-height: 1.25; }
.tiroir nav a:hover { color: var(--or); }
.tiroir .btn { margin-top: auto; }

/* ---------- Accueil (hero) ---------- */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: center; padding: 140px 0 100px; overflow: hidden; }
.hero-halo {
  position: absolute; width: 900px; height: 900px; right: -260px; top: -200px; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(200, 162, 106, .16), transparent 70%); pointer-events: none;
}
.hero-cercle { overflow: visible; position: absolute; right: 6%; top: 50%; transform: translateY(-50%); width: min(520px, 46vw); opacity: .9; pointer-events: none; }
.hero-cercle path.trace { fill: none; stroke: url(#g-or); stroke-width: 6; stroke-linecap: round; stroke-dasharray: 2600; stroke-dashoffset: 2600; animation: tracer 2.6s cubic-bezier(.6, 0, .2, 1) .3s forwards, estomper 1s ease 3.2s forwards; filter: drop-shadow(0 0 16px rgba(240, 190, 110, .6)); }
.hero-cercle path.trace-plein { fill: url(#g-or); opacity: 0; animation: apparaitre 1.2s ease 2.4s forwards; filter: drop-shadow(0 0 16px rgba(240, 190, 110, .55)); }
.hero-cercle .hero-a { fill: url(#g-or); opacity: 0; transform: translateY(24px); transform-box: fill-box; animation: apparaitreA 1.4s cubic-bezier(.2, .7, .1, 1) 1.5s forwards; filter: drop-shadow(0 0 22px rgba(226, 172, 85, .3)); }
@keyframes apparaitreA { to { opacity: 1; transform: none; } }
@keyframes tracer { to { stroke-dashoffset: 0; } }
@keyframes estomper { to { opacity: 0; } }   /* le trait s'efface : l'anneau effilé du logo reste */
@keyframes tourner { to { transform: rotate(360deg); } }
@keyframes apparaitre { to { opacity: 1; } }

.surtitre { display: inline-flex; align-items: center; gap: 16px; font-size: 12px; font-weight: 500; letter-spacing: 5px; color: var(--or); text-transform: uppercase; }
.surtitre::before { content: ''; width: 48px; height: 1px; background: var(--or); }
.hero h1 {
  margin: 28px 0 0; font-family: var(--serif); font-weight: 300; font-size: clamp(3.4rem, 8.4vw, 8.2rem);
  line-height: .96; letter-spacing: -2px; max-width: 980px; position: relative;
}
.hero h1 em { font-style: italic; color: var(--or); }
.hero h1 .ligne-mot { display: block; overflow: hidden; }
.hero h1 .ligne-mot > span { display: inline-block; transform: translateY(105%); animation: monter 1.1s cubic-bezier(.2, .7, .1, 1) forwards; }
.hero h1 .ligne-mot:nth-child(2) > span { animation-delay: .12s; }
.hero h1 .ligne-mot:nth-child(3) > span { animation-delay: .24s; }
@keyframes monter { to { transform: none; } }
.hero p.intro { margin: 36px 0 0; max-width: 560px; font-size: 19px; font-weight: 300; color: var(--muted); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 44px; }
.hero-bas {
  position: absolute; left: 0; right: 0; bottom: 36px; display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; letter-spacing: 3px; color: var(--muted); text-transform: uppercase;
}
.defiler { display: flex; align-items: center; gap: 12px; }
.defiler span { width: 1px; height: 44px; background: linear-gradient(var(--or), transparent); animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .3; } }

/* ---------- Bandeau défilant ---------- */
.bandeau { border-top: 1px solid var(--ligne); border-bottom: 1px solid var(--ligne); padding: 26px 0; overflow: hidden; background: var(--bg-2); }
.bandeau-piste { display: flex; gap: 56px; width: max-content; animation: glisser 38s linear infinite; }
.bandeau-piste span { font-family: var(--serif); font-size: 34px; font-weight: 300; font-style: italic; white-space: nowrap; display: flex; align-items: center; gap: 56px; }
.bandeau-piste span::after { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--or); }
@keyframes glisser { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
section { position: relative; }
.section { padding: 150px 0; }
.section-tete { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: end; margin-bottom: 80px; }
.section-tete h2, .grand-titre {
  margin: 20px 0 0; font-family: var(--serif); font-weight: 300; font-size: clamp(2.6rem, 5.6vw, 5rem); line-height: 1.02; letter-spacing: -1px;
}
.section-tete h2 em, .grand-titre em { color: var(--or); }
.section-tete p { margin: 0; color: var(--muted); font-size: 17px; max-width: 480px; justify-self: end; }

/* Manifeste */
.manifeste { padding: 160px 0; text-align: center; }
.manifeste p {
  margin: 0 auto; max-width: 1050px; font-family: var(--serif); font-weight: 300; font-size: clamp(2rem, 4.4vw, 3.9rem); line-height: 1.18; letter-spacing: -.5px;
}
.manifeste p em { color: var(--or); }
.manifeste .mot { opacity: .18; transition: opacity .6s; }
.manifeste .mot.allume { opacity: 1; }

/* Services */
.services-grille { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--ligne); border: 1px solid var(--ligne); border-radius: var(--r); overflow: hidden; }
.service { background: var(--bg); padding: 56px 48px 52px; display: flex; flex-direction: column; gap: 18px; position: relative; overflow: hidden; transition: background .4s; }
.service::before {
  content: ''; position: absolute; inset: 0; background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 50%), rgba(200, 162, 106, .10), transparent 45%);
  opacity: 0; transition: opacity .4s; pointer-events: none;
}
.service:hover::before { opacity: 1; }
.service-num { font-family: var(--serif); font-size: 18px; color: var(--or); }
.service-ico { width: 56px; height: 56px; border-radius: 50%; border: 1px solid var(--ligne-2); display: grid; place-items: center; color: var(--or); transition: border-color .3s, background .3s; }
.service:hover .service-ico { border-color: var(--or); background: rgba(200, 162, 106, .08); }
.service-ico svg { width: 26px; height: 26px; }
.service h3 { margin: 10px 0 0; font-family: var(--serif); font-weight: 400; font-size: 36px; line-height: 1.1; }
.service p { margin: 0; color: var(--muted); max-width: 440px; }
.service ul { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.service li { font-size: 13px; padding: 6px 14px; border: 1px solid var(--ligne-2); border-radius: 999px; color: var(--ink); }

/* Processus */
.processus { background: var(--bg-2); border-top: 1px solid var(--ligne); border-bottom: 1px solid var(--ligne); }
.etapes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; position: relative; }
.etapes::before { content: ''; position: absolute; top: 32px; left: 0; right: 0; height: 1px; background: var(--ligne-2); }
.etape { position: relative; padding-top: 0; }
.etape-rond {
  width: 64px; height: 64px; border-radius: 50%; background: var(--bg-2); border: 1px solid var(--or); display: grid; place-items: center;
  font-family: var(--serif); font-size: 24px; color: var(--or); position: relative;
}
.etape h3 { margin: 32px 0 10px; font-family: var(--serif); font-weight: 400; font-size: 30px; }
.etape p { margin: 0; color: var(--muted); font-size: 15px; }

/* Réalisations */
.projets-grille { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 28px; }
.projet { grid-column: span 6; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 20px; }
.projet:nth-child(3) { grid-column: span 12; }
.projet:hover { color: var(--ink); }
.ecran {
  position: relative; aspect-ratio: 16 / 10; border-radius: var(--r); overflow: hidden; border: 1px solid var(--ligne);
  background: linear-gradient(160deg, #1E2229, #121418); transition: transform .6s cubic-bezier(.2, .7, .1, 1), border-color .4s;
}
.projet:nth-child(3) .ecran { aspect-ratio: 21 / 8; }
.projet:hover .ecran { transform: translateY(-6px); border-color: var(--ligne-2); }
.ecran-barre { height: 34px; display: flex; align-items: center; gap: 7px; padding: 0 16px; border-bottom: 1px solid var(--ligne); }
.ecran-barre i { width: 9px; height: 9px; border-radius: 50%; background: var(--ligne-2); }
.ecran-contenu { position: absolute; inset: 34px 0 0; display: grid; place-items: center; text-align: center; padding: 24px; }
.ecran-contenu span { font-size: 12px; letter-spacing: 4px; color: var(--muted); text-transform: uppercase; border: 1px dashed var(--ligne-2); padding: 14px 22px; border-radius: 10px; }
.projet-info { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; }
.projet-info h3 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 30px; }
.projet-info p { margin: 0; color: var(--muted); font-size: 14px; }

/* Forfaits */
.forfaits-grille { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; align-items: stretch; }
.forfait { border: 1px solid var(--ligne); border-radius: var(--r); padding: 44px 36px; display: flex; flex-direction: column; gap: 22px; background: var(--bg); position: relative; }
.forfait.vedette { border-color: var(--or); background: linear-gradient(180deg, rgba(200, 162, 106, .08), transparent 40%), var(--bg); }
.forfait-etiquette { position: absolute; top: -13px; left: 36px; background: var(--or); color: var(--bg); font-size: 11px; font-weight: 600; letter-spacing: 2px; padding: 5px 12px; border-radius: 999px; text-transform: uppercase; }
.forfait h3 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 34px; }
.forfait .prix { font-family: var(--serif); font-size: 44px; font-weight: 300; line-height: 1; }
.forfait .prix small { display: block; font-family: var(--sans); font-size: 13px; color: var(--muted); margin-bottom: 8px; letter-spacing: .5px; }
.forfait > p { margin: 0; color: var(--muted); font-size: 15px; }
.forfait ul { list-style: none; padding: 22px 0 0; margin: 0; border-top: 1px solid var(--ligne); display: flex; flex-direction: column; gap: 12px; flex: 1; }
.forfait li { display: flex; gap: 12px; font-size: 15px; }
.forfait li svg { width: 18px; height: 18px; color: var(--or); flex: none; margin-top: 3px; }

/* FAQ */
.faq-grille { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 80px; }
.faq-liste { border-top: 1px solid var(--ligne); }
.faq-liste details { border-bottom: 1px solid var(--ligne); }
.faq-liste summary {
  list-style: none; cursor: pointer; padding: 28px 0; display: flex; justify-content: space-between; align-items: center; gap: 24px;
  font-family: var(--serif); font-size: 26px; font-weight: 400;
}
.faq-liste summary::-webkit-details-marker { display: none; }
.faq-plus { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--ligne-2); display: grid; place-items: center; flex: none; transition: transform .35s, border-color .3s; color: var(--or); }
.faq-plus svg { width: 16px; height: 16px; }
details[open] .faq-plus { transform: rotate(45deg); border-color: var(--or); }
.faq-liste details p { margin: 0 0 28px; color: var(--muted); max-width: 620px; }

/* Contact */
.contact { background: var(--bg-2); border-top: 1px solid var(--ligne); }
.contact-grille { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 80px; align-items: start; }
.contact-infos { display: flex; flex-direction: column; gap: 28px; position: sticky; top: 120px; }
.contact-infos p { margin: 0; color: var(--muted); font-size: 17px; max-width: 420px; }
.coord { display: flex; flex-direction: column; gap: 16px; margin-top: 12px; }
.coord a, .coord span { display: flex; align-items: center; gap: 14px; color: var(--ink); text-decoration: none; font-size: 16px; }
.coord a:hover { color: var(--or); }
.coord svg { width: 20px; height: 20px; color: var(--or); flex: none; }
.formulaire { background: var(--bg); border: 1px solid var(--ligne); border-radius: 24px; padding: 48px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.champ { display: flex; flex-direction: column; gap: 9px; }
.champ.plein { grid-column: 1 / -1; }
.champ label, .champ .etiq { font-size: 13px; font-weight: 500; letter-spacing: .4px; color: var(--ink); }
.champ label span { color: var(--or); }
.champ input, .champ select, .champ textarea {
  width: 100%; background: var(--bg-2); border: 1px solid var(--ligne-2); border-radius: 12px; padding: 15px 16px; min-height: 52px;
  color: var(--ink); font: 400 15px/1.4 var(--sans); transition: border-color .25s, background .25s; appearance: none; -webkit-appearance: none;
}
.champ select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23C8A26A' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 44px; }
.champ textarea { resize: vertical; min-height: 150px; }
.champ input:focus, .champ select:focus, .champ textarea:focus { outline: none; border-color: var(--or); background: var(--panel); }
.puces { display: flex; flex-wrap: wrap; gap: 10px; }
.puces input { position: absolute; opacity: 0; pointer-events: none; }
.puces label {
  cursor: pointer; padding: 11px 18px; min-height: 44px; display: inline-flex; align-items: center; border-radius: 999px; border: 1px solid var(--ligne-2);
  font-size: 14px; font-weight: 400; transition: all .2s;
}
.puces input:checked + label { background: var(--or); border-color: var(--or); color: var(--bg); font-weight: 600; }
.puces input:focus-visible + label { outline: 2px solid var(--or); outline-offset: 3px; }
.piege { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.formulaire .envoi { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; margin-top: 8px; }
.formulaire .envoi small { color: var(--muted); font-size: 13px; }
.btn[disabled] { opacity: .6; pointer-events: none; }
.tourne { width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: tourner .8s linear infinite; }

/* Grand appel final */
.appel { padding: 170px 0; text-align: center; overflow: hidden; }
.appel h2 { margin: 0 auto; font-family: var(--serif); font-weight: 300; font-size: clamp(3rem, 9vw, 9rem); line-height: .95; letter-spacing: -2px; }
.appel h2 em { color: var(--or); }
.appel .btn { margin-top: 56px; min-height: 60px; padding: 0 40px; font-size: 16px; }

/* Pied de page */
.pied { border-top: 1px solid var(--ligne); padding: 72px 0 40px; }
.pied-haut { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; }
.pied h4 { margin: 0 0 18px; font-size: 12px; font-weight: 500; letter-spacing: 4px; color: var(--or); text-transform: uppercase; }
.pied ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.pied ul a { color: var(--ink); text-decoration: none; font-size: 15px; }
.pied ul a:hover { color: var(--or); }
.pied-desc { color: var(--muted); max-width: 360px; margin: 22px 0 0; font-size: 15px; }
.pied-bas { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--ligne); color: var(--muted); font-size: 13px; }
.pied-bas a { color: var(--muted); text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.pied-bas a:hover { color: var(--or); }
.pied-bas svg { width: 15px; height: 15px; }

/* ---------- Fenêtre personnalisée ---------- */
.fenetre-fond {
  position: fixed; inset: 0; z-index: 200; background: rgba(8, 9, 11, .72); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  display: grid; place-items: center; padding: 24px; opacity: 0; transition: opacity .3s;
}
.fenetre-fond.visible { opacity: 1; }
.fenetre {
  width: 100%; max-width: 480px; background: var(--panel); border: 1px solid var(--ligne-2); border-radius: 24px; padding: 44px 40px 36px; text-align: center;
  transform: translateY(16px) scale(.98); transition: transform .35s cubic-bezier(.2, .7, .1, 1);
}
.fenetre-fond.visible .fenetre { transform: none; }
.fenetre-ico { width: 72px; height: 72px; margin: 0 auto 24px; border-radius: 50%; border: 1px solid var(--or); display: grid; place-items: center; color: var(--or); }
.fenetre-ico svg { width: 30px; height: 30px; }
.fenetre-ico.erreur { border-color: #D98A7A; color: #D98A7A; }
.fenetre h3 { margin: 0 0 12px; font-family: var(--serif); font-weight: 400; font-size: 32px; }
.fenetre p { margin: 0 0 28px; color: var(--muted); }

/* ---------- Apparition au défilement ---------- */
.revele { opacity: 0; transform: translateY(40px); transition: opacity 1s ease, transform 1s cubic-bezier(.2, .7, .1, 1); }
.revele.vu { opacity: 1; transform: none; }
.revele[data-delai="1"] { transition-delay: .1s; }
.revele[data-delai="2"] { transition-delay: .2s; }
.revele[data-delai="3"] { transition-delay: .3s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .revele { opacity: 1; transform: none; }
  .hero h1 .ligne-mot > span { transform: none; }
  .manifeste .mot { opacity: 1; }
}

/* ---------- Adaptatif ---------- */
@media (max-width: 1080px) {
  .hero-cercle { opacity: .35; right: -10%; width: 70vw; }
  .forfaits-grille { grid-template-columns: 1fr; max-width: 560px; }
  .etapes { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 56px; }
  .etapes::before { display: none; }
  .faq-grille, .contact-grille { grid-template-columns: 1fr; gap: 48px; }
  .contact-infos { position: static; }
}
@media (max-width: 860px) {
  .nav { display: none; }
  .menu-btn { display: grid; }
  .hero-cercle, .hero-halo { display: none; }
  .section { padding: 100px 0; }
  .section-tete { grid-template-columns: 1fr; gap: 20px; margin-bottom: 56px; }
  .section-tete p { justify-self: start; }
  .services-grille { grid-template-columns: 1fr; }
  .service { padding: 40px 28px; }
  .projet, .projet:nth-child(3) { grid-column: span 12; }
  .projet:nth-child(3) .ecran { aspect-ratio: 16 / 10; }
  .pied-haut { grid-template-columns: 1fr 1fr; }
  .pied-haut > div:first-child { grid-column: 1 / -1; }
  .manifeste, .appel { padding: 110px 0; }
}
@media (max-width: 560px) {
  .conteneur { padding: 0 20px; }
  .hero { padding-top: 120px; }
  .hero-bas { display: none; }
  .etapes { grid-template-columns: 1fr; }
  .formulaire { grid-template-columns: 1fr; padding: 28px 20px; }
  .bandeau-piste span { font-size: 26px; }
  .fenetre { padding: 36px 24px 28px; }
}