/* Mon Agence IA — charte « cabinet de conseil » : encre bleu nuit, papier, accent vermillon, Geist. */
@font-face { font-family: "Geist"; src: url("/assets/fonts/Geist-var.woff2") format("woff2"); font-weight: 300 800; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url("/assets/fonts/GeistMono-var.woff2") format("woff2"); font-weight: 400 600; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url("/assets/fonts/InstrumentSerif-Italic.woff2") format("woff2"); font-style: italic; font-weight: 400; font-display: swap; }

:root {
  --encre: #0B1730; --papier: #F7F6F2; --blanc: #FFFFFF; --pierre: #ECEAE4; --filet: #D9D6CE;
  --ardoise: #4A5468; --gris: #7A8294; --vermillon: #E4572E; --vermillon-texte: #B8411E; --sauge: #1F7A5C;
  --clair: #B9C0CE; --filet-sombre: rgba(255, 255, 255, .16);
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Instrument Serif", Georgia, serif;
  --largeur: 1200px; --gouttiere: 40px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--sans); font-size: 17px; line-height: 1.6; color: var(--encre); background: var(--papier); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-weight: 600; letter-spacing: -.03em; line-height: 1.05; margin: 0 0 .5em; }
h1 { font-size: clamp(40px, 6vw, 68px); letter-spacing: -.04em; line-height: 1.02; }
h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.035em; }
h3 { font-size: 20px; letter-spacing: -.012em; line-height: 1.25; }
p { margin: 0 0 1em; }
em, .serif { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }
h1 em, h2 em { font-size: 1.08em; line-height: .9; }
.container { width: min(var(--largeur), 100% - var(--gouttiere)); margin-inline: auto; }
.narrow { width: min(820px, 100% - var(--gouttiere)); margin-inline: auto; }
.muted { color: var(--ardoise); }
.small { font-size: 14px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--encre); color: #fff; padding: 10px 14px; z-index: 100; }
.skip-link:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--vermillon); outline-offset: 3px; }

/* Étiquettes, numéros, emplacements à compléter */
.label { display: inline-block; font-family: var(--mono); font-size: 12px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--gris); }
.label::before { content: "[ "; } .label::after { content: " ]"; }
.num { display: block; font-family: var(--mono); font-size: 12px; color: var(--gris); margin-bottom: 16px; }
.lead { font-size: clamp(17px, 1.6vw, 19px); color: var(--ardoise); max-width: 620px; }
.a-completer { color: var(--gris); background: repeating-linear-gradient(90deg, transparent 0 4px, rgba(122,130,148,.12) 4px 8px); padding: 0 .15em; border-bottom: 1px dashed var(--gris); font-style: normal; }
.on-dark .a-completer { color: var(--clair); border-color: var(--clair); background: rgba(255,255,255,.06); }

/* Boutons et liens */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font: 500 15px/1 var(--sans); padding: 17px 22px; border-radius: 2px; text-decoration: none; border: 1px solid var(--encre); cursor: pointer; transition: background .15s, color .15s, border-color .15s; white-space: nowrap; }
.btn .fl { color: var(--vermillon); transition: transform .15s; }
.btn:hover .fl { transform: translate(2px, -2px); }
.btn-p { background: var(--encre); color: #fff; }
.btn-p:hover { background: #16264a; }
.btn-s { background: transparent; color: var(--encre); }
.btn-s:hover { background: var(--encre); color: #fff; }
.btn-inv { background: #fff; color: var(--encre); border-color: #fff; }
.btn-inv-s { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn-inv-s:hover { border-color: #fff; }
.btn-sm { padding: 12px 16px; font-size: 14px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.lien { text-decoration: none; font-weight: 500; border-bottom: 1px solid var(--vermillon); padding-bottom: 2px; }
.lien:hover { color: var(--vermillon-texte); }
@media (max-width: 420px) { .btn-row .btn { width: 100%; } }

/* En-tête */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(247, 246, 242, .92); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--filet); }
.header-bar { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 32px; height: 32px; flex: none; }
.brand-name { font-weight: 600; font-size: 19px; letter-spacing: -.035em; }
.nav { display: flex; align-items: center; gap: 32px; }
.nav-list { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav-link { text-decoration: none; font-size: 15px; color: var(--ardoise); padding: 6px 0; border-bottom: 1px solid transparent; }
.nav-link:hover { color: var(--encre); }
html[data-section="expertises"] [data-section="expertises"] .nav-link, html[data-section="methode"] [data-section="methode"] .nav-link,
html[data-section="cas"] [data-section="cas"] .nav-link, html[data-section="formules"] [data-section="formules"] .nav-link,
html[data-section="agence"] [data-section="agence"] .nav-link { color: var(--encre); border-bottom-color: var(--vermillon); }
.nav-toggle { display: none; background: none; border: 1px solid var(--filet); padding: 10px 12px; font: 500 12px var(--mono); letter-spacing: .12em; color: var(--encre); cursor: pointer; border-radius: 2px; }
@media (max-width: 960px) {
  .nav-toggle { display: block; }
  .nav { position: fixed; inset: 76px 0 auto 0; flex-direction: column; align-items: stretch; gap: 20px; padding: 12px 20px 28px; background: var(--papier); border-bottom: 1px solid var(--filet); transform: translateY(-130%); transition: transform .25s; }
  .nav.open { transform: none; }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-link { display: block; padding: 16px 0; font-size: 18px; border-bottom: 1px solid var(--filet); color: var(--encre); }
}

/* Fil d'Ariane */
.breadcrumb { padding-top: 26px; font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--gris); display: flex; gap: 8px; flex-wrap: wrap; text-transform: uppercase; }
.breadcrumb a { text-decoration: none; }
.breadcrumb a:hover { color: var(--encre); }

/* Sections */
.section { padding: 112px 0; }
.section-sm { padding: 64px 0; }
.bg-blanc { background: var(--blanc); }
.bg-pierre { background: var(--pierre); }
.on-dark { background: var(--encre); color: #fff; }
.on-dark .label, .on-dark .num { color: #9AA3B5; }
.on-dark .lead, .on-dark p { color: var(--clair); }
.bordered { border-top: 1px solid var(--filet); }
.sec-head { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: end; margin-bottom: 56px; }
.sec-head h2 { margin: 16px 0 0; max-width: 620px; }
.sec-head p { margin: 0; color: var(--ardoise); max-width: 520px; }
.on-dark .sec-head p { color: var(--clair); }
@media (max-width: 860px) { .section { padding: 80px 0; } .sec-head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; } }

/* Accueil : ouverture */
.hero { padding: 88px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
.hero h1 { margin: 20px 0 26px; }
.hero h1 .gris { color: var(--ardoise); }
.proof { display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 24px 44px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--filet); }
.proof b { display: block; font-size: 30px; font-weight: 600; letter-spacing: -.035em; line-height: 1.1; }
.proof > div > span { display: block; margin-top: 6px; font-size: 13.5px; line-height: 1.4; color: var(--gris); }
.hero-visual { position: relative; }
.hero-photo { aspect-ratio: 4 / 5; object-fit: cover; width: 100%; filter: saturate(.82) contrast(1.02); }
.hero-visual .panel { position: absolute; left: -48px; bottom: 36px; width: min(380px, 90%); box-shadow: 0 30px 60px -28px rgba(11, 23, 48, .45); }
.photo-note { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; color: var(--gris); text-transform: uppercase; margin-top: 10px; text-align: right; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero-visual .panel { position: relative; left: 0; bottom: 0; width: 100%; margin-top: -60px; } .hero-photo { aspect-ratio: 4 / 3; } }

/* Panneau façon interface */
.panel { background: var(--blanc); border: 1px solid var(--filet); font-size: 14px; }
.panel-h { display: flex; justify-content: space-between; padding: 11px 16px; border-bottom: 1px solid var(--filet); font-family: var(--mono); font-size: 11px; color: var(--gris); }
.panel-row { display: grid; grid-template-columns: 10px 1fr auto; gap: 12px; padding: 13px 16px; border-bottom: 1px solid var(--filet); align-items: center; }
.panel-row:last-child { border-bottom: 0; }
.dot { width: 8px; height: 8px; background: var(--filet); }
.dot.on { background: var(--vermillon); } .dot.ok { background: var(--sauge); }
.tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: .04em; padding: 3px 7px; border: 1px solid var(--filet); color: var(--ardoise); white-space: nowrap; }
.tag.v { border-color: var(--vermillon); color: var(--vermillon-texte); }
.tag.ok { border-color: var(--sauge); color: var(--sauge); }

/* Références */
.refs { padding: 40px 0; background: var(--blanc); border-block: 1px solid var(--filet); }
.refs-head { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; flex-wrap: wrap; margin-bottom: 26px; }
.refs-head p { margin: 0; font-size: 13.5px; color: var(--gris); }
.refs-grid { display: grid; grid-template-columns: repeat(9, 1fr); gap: 28px 36px; align-items: center; }
.refs-grid img { height: 34px; width: 100%; object-fit: contain; filter: grayscale(1) contrast(1.1); opacity: .62; transition: opacity .2s, filter .2s; }
.refs-grid img:hover { filter: none; opacity: 1; }
@media (max-width: 960px) { .refs-grid { grid-template-columns: repeat(3, 1fr); } .refs-grid img { height: 30px; } }

/* Grilles à filets */
.grid-filets { display: grid; grid-template-columns: repeat(var(--n, 4), 1fr); border-top: 1px solid var(--encre); }
.grid-filets > * { padding: 26px 28px 8px 0; }
.grid-filets > * + * { padding-left: 28px; border-left: 1px solid var(--filet); }
.grid-filets h3 { margin-bottom: 10px; }
.grid-filets p { color: var(--ardoise); font-size: 15.5px; }
.on-dark .grid-filets { border-top-color: var(--filet-sombre); }
.on-dark .grid-filets > * + * { border-left-color: var(--filet-sombre); }
.on-dark .grid-filets p { color: var(--clair); }
@media (max-width: 960px) { .grid-filets { grid-template-columns: 1fr 1fr; } .grid-filets > * { padding: 24px 20px 12px 0 !important; border-left: 0 !important; border-bottom: 1px solid var(--filet); } }
@media (max-width: 560px) { .grid-filets { grid-template-columns: 1fr; } }
.liste-tirets { list-style: none; padding: 0; margin: 14px 0 0; }
.liste-tirets li { padding: 9px 0; border-top: 1px solid var(--filet); color: var(--ardoise); font-size: 15px; }
.liste-tirets li::before { content: "— "; color: var(--vermillon); }

/* Expertise en ligne (page Expertises) */
.expertise { display: grid; grid-template-columns: 90px 1fr 1fr; gap: 40px; padding: 48px 0; border-top: 1px solid var(--filet); }
.expertise:last-child { border-bottom: 1px solid var(--filet); }
.expertise h2 { font-size: clamp(26px, 3vw, 34px); margin: 0 0 14px; }
.expertise .num { font-size: 13px; }
@media (max-width: 860px) { .expertise { grid-template-columns: 1fr; gap: 12px; } }

/* Chiffres */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--filet-sombre); }
.stats > div { padding: 28px 24px 0 0; }
.stats b { display: block; font-size: clamp(42px, 5vw, 60px); font-weight: 600; letter-spacing: -.045em; line-height: 1; }
.stats b small { color: var(--vermillon); font-size: 1em; }
.stats > div > span { display: block; margin-top: 12px; font-size: 14.5px; color: var(--clair); max-width: 240px; }
@media (max-width: 860px) { .stats { grid-template-columns: 1fr 1fr; gap: 0 20px; } .stats > div { padding-bottom: 28px; } }

/* Photos */
.photo { width: 100%; object-fit: cover; filter: saturate(.82) contrast(1.02); }
.photo-band { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 12px; margin-top: 56px; }
.photo-band img { aspect-ratio: 4 / 3; }
.photo-band img:first-child { aspect-ratio: auto; height: 100%; grid-row: span 2; }
@media (max-width: 860px) { .photo-band { grid-template-columns: 1fr 1fr; } .photo-band img:first-child { grid-column: span 2; grid-row: auto; aspect-ratio: 16 / 9; } }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split-photo img { aspect-ratio: 5 / 4; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; gap: 36px; } }

/* Cas client */
.cas { display: grid; grid-template-columns: 1fr 1fr 1fr; border: 1px solid var(--filet); background: var(--blanc); }
.cas > div { padding: 30px; }
.cas > div + div { border-left: 1px solid var(--filet); }
.cas .big { font-size: 48px; font-weight: 600; letter-spacing: -.04em; line-height: 1; margin: 10px 0; }
.cas-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 30px; border: 1px solid var(--filet); border-bottom: 0; background: var(--blanc); font-family: var(--mono); font-size: 12px; color: var(--gris); }
@media (max-width: 860px) { .cas { grid-template-columns: 1fr; } .cas > div + div { border-left: 0; border-top: 1px solid var(--filet); } }

/* Étapes de méthode */
.etapes { counter-reset: e; }
.etape { display: grid; grid-template-columns: 90px 1fr 1fr; gap: 40px; padding: 40px 0; border-top: 1px solid var(--filet); }
.etape:last-child { border-bottom: 1px solid var(--filet); }
.etape .num { font-size: 13px; color: var(--vermillon-texte); }
.etape h3 { font-size: 26px; letter-spacing: -.025em; }
.etape .duree { font-family: var(--mono); font-size: 12px; color: var(--gris); }
@media (max-width: 860px) { .etape { grid-template-columns: 1fr; gap: 10px; } }

/* Formules */
.formules { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--filet); background: var(--blanc); }
.formule { padding: 36px 32px; display: flex; flex-direction: column; }
.formule + .formule { border-left: 1px solid var(--filet); }
.formule.reco { background: var(--encre); color: #fff; }
.formule.reco p, .formule.reco li { color: var(--clair); }
.formule.reco .label { color: #9AA3B5; }
.formule h3 { font-size: 24px; margin: 14px 0 10px; }
.formule .prix { font-size: 34px; font-weight: 600; letter-spacing: -.035em; margin: 18px 0 2px; }
.formule .prix small { font-size: 14px; font-weight: 400; color: var(--gris); letter-spacing: 0; }
.formule ul { list-style: none; padding: 0; margin: 22px 0 28px; flex: 1; }
.formule li { padding: 10px 0; border-top: 1px solid var(--filet); font-size: 15px; color: var(--ardoise); }
.formule.reco li { border-top-color: var(--filet-sombre); }
.formule li::before { content: "— "; color: var(--vermillon); }
@media (max-width: 960px) { .formules { grid-template-columns: 1fr; } .formule + .formule { border-left: 0; border-top: 1px solid var(--filet); } }

/* Simulateur */
.simu { display: grid; grid-template-columns: 1.1fr .9fr; border: 1px solid var(--filet); background: var(--blanc); }
.simu-form { padding: 36px; display: grid; gap: 26px; }
.simu-form label { display: grid; gap: 10px; font-size: 15px; font-weight: 500; }
.simu-form .val { font-family: var(--mono); font-size: 13px; color: var(--vermillon-texte); float: right; font-weight: 500; }
.simu-form input[type=range] { width: 100%; accent-color: var(--encre); }
.simu-out { background: var(--encre); color: #fff; padding: 36px; display: flex; flex-direction: column; justify-content: space-between; gap: 24px; }
.simu-out b { display: block; font-size: clamp(44px, 5vw, 60px); font-weight: 600; letter-spacing: -.045em; line-height: 1; }
.simu-out b small { color: var(--vermillon); font-size: 1em; }
.simu-out span { color: var(--clair); font-size: 14.5px; }
.simu-out .note { font-size: 12.5px; color: #8E97AA; line-height: 1.5; }
@media (max-width: 860px) { .simu { grid-template-columns: 1fr; } }

/* Fondateur */
.fondateur { display: grid; grid-template-columns: 340px 1fr; gap: 64px; align-items: start; }
.portrait { aspect-ratio: 4 / 5; background: var(--pierre); border: 1px dashed var(--gris); display: grid; place-items: center; text-align: center; padding: 24px; font-family: var(--mono); font-size: 12px; color: var(--gris); letter-spacing: .06em; text-transform: uppercase; }
@media (max-width: 860px) { .fondateur { grid-template-columns: 1fr; gap: 32px; } .portrait { max-width: 320px; } }

/* FAQ */
.faq details { border-top: 1px solid var(--filet); }
.faq details:last-child { border-bottom: 1px solid var(--filet); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 24px; padding: 24px 0; font-size: 19px; font-weight: 500; letter-spacing: -.012em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--vermillon); font-size: 20px; }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding: 0 0 26px; color: var(--ardoise); max-width: 760px; }

/* Appel final */
.cta-final { display: grid; grid-template-columns: 1.2fr .8fr; gap: 64px; align-items: end; }
.cta-final h2 { font-size: clamp(34px, 4.6vw, 54px); letter-spacing: -.04em; margin: 16px 0 0; }
@media (max-width: 860px) { .cta-final { grid-template-columns: 1fr; gap: 24px; } }

/* Formulaire */
.form { display: grid; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form label { display: grid; gap: 8px; font-size: 14px; font-weight: 500; }
.form input, .form select, .form textarea { font: inherit; font-size: 16px; color: var(--encre); background: var(--blanc); border: 1px solid var(--filet); border-radius: 2px; padding: 14px 14px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--encre); }
.form textarea { min-height: 150px; resize: vertical; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

/* Texte long */
.prose { max-width: 760px; }
.prose h2 { font-size: clamp(24px, 3vw, 30px); margin: 2em 0 .6em; }
.prose p, .prose li { color: var(--ardoise); }
.prose ul { padding-left: 1.2em; }
.prose a { text-decoration-color: var(--vermillon); text-underline-offset: 3px; }

/* Page simple */
.page-head { padding: 64px 0 56px; border-bottom: 1px solid var(--filet); }
.page-head h1 { font-size: clamp(38px, 5.4vw, 62px); margin: 18px 0 20px; max-width: 900px; }

/* Pied de page */
.site-footer { background: var(--encre); color: var(--clair); padding: 72px 0 32px; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.footer-grid .brand-name { color: #fff; }
.footer-grid p { margin: 18px 0 0; max-width: 320px; line-height: 1.6; }
.footer-title { font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: #8E97AA; margin: 0 0 16px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { text-decoration: none; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--filet-sombre); font-size: 13px; color: #8E97AA; }
@media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: span 2; } }

/* Apparition au défilement */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible, .no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }
.grid-filets.grid-pile { grid-template-columns: 1fr; }
.grid-filets.grid-pile > * { padding: 24px 0 12px !important; border-left: 0 !important; }
.grid-filets.grid-pile > * + * { border-top: 1px solid var(--filet); }
.on-dark .grid-filets.grid-pile > * + * { border-top-color: var(--filet-sombre); }
.a-completer { font-size: inherit; }
@media (max-width: 560px) { .proof { grid-template-columns: 1fr 1fr; } }