/* lirenprism.com — page de société (TODO-977, v2 du 2026-10-05). Charte : liren.brand.identity v2.2 (palette, Outfit /
   Inter / JetBrains Mono, thème clair). Polices AUTO-HÉBERGÉES (reprises de l'ancienne vitrine) : aucun appel tiers,
   aucun script, aucun cookie. */
@font-face { font-family: "Inter"; font-style: normal; font-weight: 400 700; font-display: swap; src: url(/assets/fonts/Inter.woff2) format("woff2"); }
@font-face { font-family: "Outfit"; font-style: normal; font-weight: 600 700; font-display: swap; src: url(/assets/fonts/Outfit.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 400 500; font-display: swap; src: url(/assets/fonts/JetBrainsMono.woff2) format("woff2"); }

:root {
  --indigo: #362982; --indigo-hover: #2A1F66; --indigo-nuit: #1B1546; --canard: #006B89; --violet: #762881; --teal: #00757F;
  --cyan: #1983A6; --vert: #48AB46; --texte: #1D1D1D; --texte-2: #5B6474; --fond: #FFFFFF; --fond-2: #F4F6FA; --bordure: #E2E8F0;
  --fdb-rouge: #C8161F; --fdb-rouge-sombre: #7E120B;
  --spectre: linear-gradient(90deg, #1983A6, #362982, #762881, #00757F, #48AB46, #006B89);
  --titre: "Outfit", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --corps: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --rayon: 16px; --ombre: 0 1px 2px rgba(27,21,70,.05), 0 12px 32px -12px rgba(27,21,70,.18);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--fond); color: var(--texte); font: 400 17px/1.65 var(--corps); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; }
a { color: var(--indigo); text-underline-offset: 3px; }
a:hover { color: var(--indigo-hover); }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }
.conteneur { max-width: 1140px; margin: 0 auto; padding: 0 28px; }
h1, h2, h3 { font-family: var(--titre); font-weight: 700; line-height: 1.12; margin: 0; letter-spacing: -.015em; }
h2 { font-size: clamp(30px, 4vw, 44px); margin-bottom: 18px; }
h3 { font-size: 22px; line-height: 1.25; font-weight: 600; }
section { padding: 104px 0; }
.sur { font-family: var(--mono); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--violet); margin: 0 0 14px; }
.sur.clair { color: #C9C2F2; }
.intro { font-size: 19px; color: var(--texte-2); max-width: 62ch; margin: 0 0 48px; }

/* En-tête collante, verre dépoli */
.entete { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.82); backdrop-filter: saturate(1.4) blur(12px);
          -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid rgba(226,232,240,.8); }
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 72px; flex-wrap: wrap; }
.marque img { display: block; height: 32px; width: auto; }
.nav { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; font-size: 15px; font-weight: 500; }
.nav a { color: var(--texte); text-decoration: none; }
.nav a:hover { color: var(--indigo); }
.langue { font-family: var(--mono); font-size: 12px; border: 1px solid var(--bordure); border-radius: 999px; padding: 4px 11px; }

/* Accroche */
.hero { position: relative; overflow: hidden; padding: 96px 0 112px;
        background: radial-gradient(1100px 520px at 88% 30%, rgba(118,40,129,.10), transparent 60%),
                    radial-gradient(900px 480px at 70% 90%, rgba(25,131,166,.10), transparent 60%), var(--fond); }
.hero-grille { display: grid; grid-template-columns: 1.08fr .92fr; gap: 40px; align-items: center; }
.surtitre { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 13px; letter-spacing: .06em;
            text-transform: uppercase; color: var(--indigo); background: #EEECFA; border-radius: 999px; padding: 6px 14px; margin: 0 0 26px; }
.point { width: 8px; height: 8px; border-radius: 50%; background: var(--spectre); box-shadow: 0 0 0 4px rgba(54,41,130,.12); }
.hero h1 { font-size: clamp(40px, 6.2vw, 72px); line-height: 1.04; }
.hero h1 em { font-style: normal; background: var(--spectre); -webkit-background-clip: text; background-clip: text; color: transparent; }
.chapo { font-size: 20px; color: var(--texte-2); max-width: 54ch; margin: 26px 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 36px 0 0; }
.bouton { display: inline-block; background: var(--indigo); color: #fff; text-decoration: none; font-weight: 600; font-size: 16px;
          padding: 14px 26px; border-radius: 999px; box-shadow: 0 8px 20px -8px rgba(54,41,130,.6); transition: transform .15s, background .15s; }
.bouton:hover { background: var(--indigo-hover); color: #fff; transform: translateY(-1px); }
.bouton.secondaire { background: transparent; color: var(--indigo); box-shadow: inset 0 0 0 1.5px var(--indigo); }
.bouton.secondaire:hover { background: #EEECFA; color: var(--indigo-hover); }
.bouton.rouge { background: var(--fdb-rouge); box-shadow: 0 8px 20px -8px rgba(200,22,31,.55); margin-top: 12px; }
.bouton.rouge:hover { background: var(--fdb-rouge-sombre); }
.hero-visuel { position: relative; }
.prisme { display: block; width: 100%; height: auto; filter: drop-shadow(0 24px 40px rgba(27,21,70,.14)); }

/* Démarche : quatre temps, chacun dans une couleur du spectre */
.demarche { background: var(--fond-2); }
.piliers { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: p; }
.pilier { position: relative; background: var(--fond); border-radius: var(--rayon); padding: 30px 26px 30px; box-shadow: var(--ombre); overflow: hidden; }
.pilier::before { content: ""; position: absolute; left: 0; top: 0; right: 0; height: 4px; background: var(--c); }
.pilier .num { display: block; font-family: var(--mono); font-size: 13px; color: var(--c); margin-bottom: 18px; font-weight: 500; }
.pilier h3 { margin-bottom: 12px; }
.pilier p { margin: 0; color: var(--texte-2); font-size: 16px; }
.p1 { --c: var(--cyan); } .p2 { --c: var(--indigo); } .p3 { --c: var(--violet); } .p4 { --c: var(--fdb-rouge); }

/* Pourquoi : trois citations de l'Observatoire */
.points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.point-carte { margin: 0; background: var(--fond); border: 1px solid var(--bordure); border-radius: var(--rayon); padding: 30px; box-shadow: var(--ombre); }
.point-carte h3 { font-size: 19px; margin-bottom: 14px; color: var(--indigo); }
.point-carte blockquote { margin: 0; font-size: 16px; line-height: 1.6; color: var(--texte); }
.source-bloc { margin: 22px 0 0; font-family: var(--mono); font-size: 13px; color: var(--texte-2); }

/* Constats : bande sombre */
.constats { background: radial-gradient(900px 500px at 10% 0%, rgba(118,40,129,.45), transparent 60%),
                       radial-gradient(800px 480px at 95% 100%, rgba(25,131,166,.30), transparent 60%), var(--indigo-nuit); color: #ECEAFB; }
.constats h2, .constats h3 { color: #fff; }
.intro.clair { color: #C9C4EE; }
.constats-grille { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.constat { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: var(--rayon); padding: 26px 26px 22px;
           display: flex; flex-direction: column; }
.c-titre { margin: 0 0 12px; font-family: var(--mono); font-size: 12.5px; letter-spacing: .06em; text-transform: uppercase; color: #C9C2F2; }
.c-chiffre { margin: 0 0 10px; font-family: var(--titre); font-weight: 700; font-size: clamp(30px, 3.4vw, 40px); line-height: 1.05;
             background: linear-gradient(90deg, #7FD3EE, #C7B8FF, #9BE29A); -webkit-background-clip: text; background-clip: text; color: transparent; }
.c-texte { margin: 0 0 18px; color: #D5D1F3; font-size: 15.5px; flex: 1; }
.c-date { margin: 0; font-family: var(--mono); font-size: 12px; color: #9C96CC; }
.cas { margin-top: 56px; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
       border-top: 1px solid rgba(255,255,255,.14); padding-top: 56px; }
.cas h3 { font-size: clamp(24px, 2.6vw, 30px); margin-bottom: 14px; }
.cas p { color: #D5D1F3; font-size: 17px; }
.cas .note { font-family: var(--mono); font-size: 13px; color: #A9A3D6; }
.cas-table { width: 100%; border-collapse: separate; border-spacing: 0 14px; background: rgba(255,255,255,.06);
             border: 1px solid rgba(255,255,255,.12); border-radius: var(--rayon); padding: 10px 26px 18px; }
.cas-table caption { caption-side: bottom; text-align: left; font-size: 13px; color: #A9A3D6; padding: 4px 26px 0; }
.cas-table thead th { font-weight: 500; font-size: 13px; color: #A9A3D6; text-align: left; padding: 0 8px; }
.cas-table tbody th { text-align: left; font-weight: 600; color: #fff; padding-right: 14px; white-space: nowrap; }
.cas-table td { padding: 0 8px; width: 42%; }
.cas-table .barre { display: inline-block; vertical-align: middle; width: calc(100% - 58px); height: 10px; border-radius: 999px;
                    background: rgba(255,255,255,.12); overflow: hidden; }
.cas-table .barre span { display: block; height: 100%; border-radius: 999px; background: var(--spectre); }
.cas-table .v { display: inline-block; width: 52px; text-align: right; font-family: var(--titre); font-weight: 700; color: #fff; }

/* Transition vers FaireDuBruit */
.transition-grille { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; align-items: start; }
.grande-citation { margin: 0 0 28px; font-family: var(--titre); font-weight: 600; font-size: clamp(24px, 2.8vw, 32px); line-height: 1.3; color: var(--indigo);
                   border-left: 4px solid; border-image: var(--spectre) 1; padding-left: 24px; }
.grande-citation cite { display: block; margin-top: 12px; font-family: var(--mono); font-style: normal; font-size: 13px; font-weight: 400; color: var(--texte-2); }
.transition p { font-size: 18px; color: var(--texte); margin: 0 0 16px; }

/* Principes et but */
.principes-section { background: var(--fond-2); }
.principes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.principes li { background: var(--fond); border-radius: var(--rayon); padding: 26px; box-shadow: var(--ombre); }
.principes strong { display: block; font-family: var(--titre); font-size: 19px; color: var(--texte); margin-bottom: 8px; }
.principes span { color: var(--texte-2); font-size: 15.5px; }
.but { margin-top: 64px; text-align: center; }
.but-texte { margin: 0 auto; max-width: 30ch; font-family: var(--titre); font-weight: 700; font-size: clamp(28px, 3.8vw, 44px); line-height: 1.15;
             background: var(--spectre); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* FaireDuBruit : les couleurs de sa propre charte */
.fdb-grille { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
.fdb .sur { color: var(--fdb-rouge); }
.logo-fdb { display: block; height: 64px; width: auto; margin: 4px 0 26px; }
.fdb-h { font-size: clamp(26px, 3vw, 34px); margin-bottom: 16px; }
.fdb p { margin: 0 0 14px; }
.fdb .bleu { color: var(--canard); font-weight: 600; }
.fdb .vert { color: var(--teal); font-weight: 600; }
.chiffre { margin: 0; background: #FBFAF7; border: 1px solid #E4E2DC; border-radius: var(--rayon); padding: 40px; box-shadow: var(--ombre); }
.chiffre .valeur { font-family: var(--titre); font-weight: 700; font-size: clamp(72px, 9vw, 112px); line-height: .95; color: var(--fdb-rouge); letter-spacing: -.03em; }
.chiffre .legende { font-size: 19px; margin: 14px 0 0; font-weight: 500; }
.chiffre .reste { margin: 14px 0 0; color: var(--texte-2); }
.chiffre .source { font-size: 13px; color: #767574; margin: 20px 0 0; line-height: 1.5; }

/* Contact */
.contact { padding: 96px 0; }
.contact-carte { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
                 background: linear-gradient(90deg, rgba(27,21,70,.55), rgba(27,21,70,.15)), var(--spectre); border-radius: 24px; padding: 56px; color: #fff; box-shadow: 0 30px 60px -30px rgba(54,41,130,.7); }
.contact-carte h2 { color: #fff; margin-bottom: 8px; }
.contact-carte p { margin: 0; color: rgba(255,255,255,.88); max-width: 46ch; }
.contact-carte .sur.clair { color: rgba(255,255,255,.8); }
.adresse { font-family: var(--titre); font-weight: 600; font-size: clamp(20px, 2.6vw, 28px); color: var(--indigo-nuit); background: #fff;
           border-radius: 999px; padding: 16px 30px; text-decoration: none; word-break: break-all; transition: transform .15s; }
.adresse:hover { color: var(--indigo); transform: translateY(-1px); }

/* Mentions */
.mentions { padding: 72px 0 80px; font-size: 14px; color: var(--texte-2); border-top: 1px solid var(--bordure); }
.mentions h2 { font-size: 22px; color: var(--texte); margin-bottom: 22px; }
.mentions dl { display: grid; grid-template-columns: 230px 1fr; gap: 10px 24px; margin: 0; }
.mentions dt { font-weight: 600; color: var(--texte); }
.mentions dd { margin: 0; }

.pied { font-size: 13px; color: var(--texte-2); }
.spectre-ligne { height: 4px; background: var(--spectre); }
.pied .conteneur { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 22px; padding-bottom: 26px; }

/* Page de désinscription */
.page-message { background: radial-gradient(900px 500px at 85% 10%, rgba(118,40,129,.08), transparent 60%), var(--fond); }
.message { padding: 112px 0 120px; max-width: 700px; }
.message h1 { font-size: clamp(34px, 5vw, 52px); margin-bottom: 22px; }
.message p { font-size: 19px; }
.message .en { color: var(--texte-2); border-top: 1px solid var(--bordure); padding-top: 24px; margin-top: 32px; }
.message .bouton { margin-top: 18px; }

@media (max-width: 1000px) {
  .piliers, .principes, .constats-grille { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  section { padding: 72px 0; }
  .hero { padding: 56px 0 64px; }
  .hero-grille, .fdb-grille, .cas, .transition-grille { grid-template-columns: 1fr; gap: 36px; }
  .points { grid-template-columns: 1fr; }
  .hero-visuel { max-width: 440px; }
  .contact-carte { padding: 36px 28px; }
  .mentions dl { grid-template-columns: 1fr; gap: 2px; }
  .mentions dd { margin-bottom: 12px; }
  .nav { gap: 18px; }
  .nav a:not(.langue):not(.nav-contact) { display: none; }
}
@media (max-width: 560px) {
  .conteneur { padding: 0 18px; }
  .piliers, .principes, .constats-grille { grid-template-columns: 1fr; }
  .cas-table { padding: 8px 14px 14px; }
  .cas-table .barre { width: calc(100% - 50px); }
  .cas-table .v { width: 46px; font-size: 14px; }
  .chiffre { padding: 28px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }