/* Game Theory Co. : feuille de style unique du site (aucune ressource externe, aucun script). */

:root {
  --papier: #f7f5ef;
  --carte: #ffffff;
  --encre: #172026;
  --encre-douce: #4b5762;
  --ligne: #e2ddd1;
  --vert: #1d6b55;
  --vert-fonce: #155242;
  --vert-pale: #e2efe8;
  --ambre-pale: #fbefc4;
  --rouge: #9f2f1d;
  --texte-bouton: #ffffff;
  --fond-contact: #172026;
  --texte-contact: #f3f1ea;
  --ombre: 0 1px 2px rgba(23, 32, 38, .06), 0 10px 28px rgba(23, 32, 38, .09);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --papier: #12181c;
    --carte: #1a2228;
    --encre: #eef1ee;
    --encre-douce: #a9b4bb;
    --ligne: #2c363d;
    --vert: #5bbf99;
    --vert-fonce: #7bd3b0;
    --vert-pale: #1c3a30;
    --ambre-pale: #4a3f1a;
    --rouge: #f39a86;
    --texte-bouton: #0d1a15;
    --fond-contact: #0b1013;
    --texte-contact: #eef1ee;
    --ombre: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 28px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--papier);
  color: var(--encre);
  font: 17px/1.6 var(--sans);
  overflow-wrap: break-word;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.35rem); margin: .3em 0 .45em; }
h2 { font-size: clamp(1.65rem, 3.2vw, 2.3rem); margin: 0 0 .5em; }
h3 { font-size: 1.25rem; margin: 0 0 .4em; }
p { margin: 0 0 1em; }

a { color: var(--vert); }
a:hover { color: var(--vert-fonce); }
:focus-visible { outline: 3px solid var(--vert); outline-offset: 3px; border-radius: 4px; }

.conteneur { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

.vh {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.evitement { position: absolute; left: 12px; top: -60px; z-index: 20; background: var(--carte); padding: 8px 14px; border-radius: 8px; }
.evitement:focus { top: 12px; }

/* En-tête */

.entete { position: sticky; top: 0; z-index: 10; background: var(--papier); border-bottom: 1px solid var(--ligne); }
.entete .conteneur { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.marque { display: flex; align-items: center; gap: 10px; color: var(--encre); text-decoration: none; font-family: var(--serif); font-weight: 600; font-size: 1.15rem; white-space: nowrap; }
.marque:hover { color: var(--encre); }
.marque svg { width: 30px; height: 30px; flex: none; }
.nav { display: flex; align-items: center; gap: 22px; font-size: .95rem; }
.nav a { color: var(--encre-douce); text-decoration: none; }
.nav a:hover { color: var(--encre); }
.nav .langue { border: 1px solid var(--ligne); border-radius: 999px; padding: 2px 11px; font-size: .8rem; font-weight: 700; letter-spacing: .05em; }
@media (max-width: 760px) { .nav .secondaire { display: none; } .nav { gap: 14px; } }

/* Boutons */

.bouton { display: inline-block; padding: 13px 22px; border-radius: 10px; font-weight: 600; text-decoration: none; line-height: 1.3; }
.bouton.principal { background: var(--vert); color: var(--texte-bouton); }
.bouton.principal:hover { background: var(--vert-fonce); color: var(--texte-bouton); }
.bouton.secondaire { background: var(--carte); color: var(--encre); border: 1px solid var(--ligne); }
.bouton.secondaire:hover { border-color: var(--encre-douce); color: var(--encre); }

/* Accueil */

.hero { padding: 64px 0 72px; }
.hero .conteneur { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.surtitre { margin: 0; font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--vert); }
.chapeau { font-size: 1.15rem; color: var(--encre-douce); max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 14px; }
.note { font-size: .9rem; color: var(--encre-douce); margin: 0; }
@media (max-width: 900px) {
  .hero { padding: 40px 0 56px; }
  .hero .conteneur { grid-template-columns: 1fr; gap: 40px; }
}

/* La démonstration : une facture et sa saisie (exemple fictif) */

.demo { margin: 0; min-width: 0; }
.facture {
  position: relative; z-index: 1;
  width: min(300px, 82%);
  padding: 18px 20px;
  background: #fffdf8; color: #1d242a;
  border: 1px solid #e6e0d2; border-radius: 6px;
  box-shadow: var(--ombre);
  font-size: .82rem; font-variant-numeric: tabular-nums;
  transform: rotate(-2deg);
}
.facture .tete { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px solid #e6e0d2; }
.facture .tete strong { font-family: var(--serif); font-size: .98rem; }
.facture .tete span { text-align: right; color: #5b6670; }
.facture .ligne { display: flex; justify-content: space-between; gap: 12px; padding: 2px 0; }
.facture .ligne.detail { padding-bottom: 8px; }
.facture .ligne.total { margin-top: 6px; padding: 6px 6px 4px; border-top: 1px solid #1d242a; font-weight: 700; background: #fbefc4; border-radius: 0 0 3px 3px; }

.chiffrier {
  position: relative; z-index: 2;
  width: min(100%, 540px); margin: 18px 0 0 auto;
  background: var(--carte); border: 1px solid var(--ligne); border-radius: 12px;
  box-shadow: var(--ombre); overflow: hidden;
}
.chiffrier .barre { display: flex; justify-content: space-between; gap: 12px; padding: 9px 14px; border-bottom: 1px solid var(--ligne); font-size: .78rem; color: var(--encre-douce); }
.chiffrier .barre strong { color: var(--encre); font-weight: 600; }
.tableau { overflow-x: auto; }
.chiffrier table { width: 100%; border-collapse: collapse; font-size: .8rem; font-variant-numeric: tabular-nums; }
.chiffrier th, .chiffrier td { padding: 8px 10px; text-align: right; white-space: nowrap; border-bottom: 1px solid var(--ligne); }
.chiffrier th:first-child, .chiffrier td:first-child { text-align: left; }
.chiffrier th { font-size: .7rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--encre-douce); }
.chiffrier .ok { color: var(--vert); font-weight: 700; }
.chiffrier tr.exception td { background: var(--ambre-pale); }
.chiffrier .alerte { color: var(--rouge); font-weight: 700; }
.onglets { display: flex; gap: 2px; padding: 0 10px; border-bottom: 1px solid var(--ligne); font-size: .75rem; }
.onglets span { padding: 6px 12px; color: var(--encre-douce); }
.onglets .actif { color: var(--encre); font-weight: 700; box-shadow: inset 0 -2px 0 var(--vert); }
.raison { margin: 0; padding: 10px 14px 12px; font-size: .8rem; color: var(--encre-douce); }
.raison strong { color: var(--rouge); }
.demo figcaption { margin-top: 10px; font-size: .78rem; color: var(--encre-douce); text-align: right; }
@media (max-width: 560px) { .col-taxe { display: none; } }

/* Sections */

section { padding: 72px 0; }
.bande { background: var(--carte); border-top: 1px solid var(--ligne); border-bottom: 1px solid var(--ligne); }
.intro { max-width: 40em; font-size: 1.08rem; color: var(--encre-douce); }
@media (max-width: 560px) { section { padding: 56px 0; } }

.secteurs { padding: 36px 0; }
.secteurs .conteneur { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px; }
.secteurs h2 { font-family: var(--sans); font-size: 1rem; font-weight: 600; letter-spacing: 0; margin: 0; color: var(--encre-douce); }
.secteurs ul { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.secteurs li { padding: 6px 14px; border: 1px solid var(--ligne); border-radius: 999px; background: var(--papier); font-size: .95rem; }

.services { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 20px; margin-top: 32px; }
.service { background: var(--carte); border: 1px solid var(--ligne); border-radius: 14px; padding: 26px; }
.service p { color: var(--encre-douce); }
.service.vedette { border-color: var(--vert); box-shadow: inset 0 4px 0 var(--vert); }
.etiquette { display: inline-block; margin-bottom: 12px; padding: 3px 10px; border-radius: 999px; background: var(--vert-pale); color: var(--vert); font-size: .74rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
@media (max-width: 900px) { .services { grid-template-columns: 1fr; } }

.coches { list-style: none; padding: 0; margin: 16px 0 0; }
.coches li { position: relative; margin: 8px 0; padding-left: 28px; }
.coches li::before {
  content: ""; position: absolute; left: 5px; top: .4em;
  width: 6px; height: 11px;
  border: solid var(--vert); border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
}

.deux-colonnes { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 900px) { .deux-colonnes { grid-template-columns: 1fr; gap: 28px; } }

.livrables { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.livrables li { padding: 18px 20px; background: var(--papier); border: 1px solid var(--ligne); border-radius: 12px; }
.livrables strong { display: block; font-family: var(--serif); font-size: 1.1rem; margin-bottom: 2px; }
.livrables span { color: var(--encre-douce); }

.etapes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; list-style: none; padding: 0; margin: 32px 0 0; counter-reset: etape; }
.etapes li { counter-increment: etape; padding-top: 14px; border-top: 2px solid var(--encre); }
.etapes li::before { content: counter(etape, decimal-leading-zero); display: block; margin-bottom: 6px; font-family: var(--serif); font-size: 1.6rem; color: var(--vert); }
.etapes p { color: var(--encre-douce); margin: 0; }
@media (max-width: 900px) { .etapes { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .etapes { grid-template-columns: 1fr; } }

.garanties { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; list-style: none; padding: 0; margin: 28px 0 0; }
.garanties li { padding: 20px 22px; background: var(--carte); border: 1px solid var(--ligne); border-radius: 12px; }
.garanties strong { display: block; margin-bottom: 4px; }
.garanties span { color: var(--encre-douce); }
@media (max-width: 760px) { .garanties { grid-template-columns: 1fr; } }

.faq { max-width: 52em; }
.faq details { padding: 18px 0; border-bottom: 1px solid var(--ligne); }
.faq details:first-of-type { border-top: 1px solid var(--ligne); }
.faq summary { display: flex; justify-content: space-between; gap: 16px; cursor: pointer; list-style: none; font-weight: 600; font-size: 1.08rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; font-size: 1.4rem; line-height: 1; color: var(--vert); }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 10px 0 0; max-width: 46em; color: var(--encre-douce); }

.contact { background: var(--fond-contact); color: var(--texte-contact); }
.contact h2 { color: var(--texte-contact); }
.contact p { max-width: 40em; opacity: .85; }
.contact .bouton.principal { background: var(--texte-contact); color: var(--fond-contact); margin-top: 12px; }
.contact .bouton.principal:hover { background: #ffffff; color: var(--fond-contact); }
.contact .adresse { margin-top: 14px; font-size: .95rem; opacity: .75; }
.contact :focus-visible { outline-color: var(--texte-contact); }

/* Pied de page */

.pied { padding: 28px 0 40px; font-size: .9rem; color: var(--encre-douce); }
.pied .conteneur { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.pied nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.pied a { color: var(--encre-douce); }
.pied a:hover { color: var(--encre); }

/* Pages de texte (confidentialité, page introuvable) */

.document { max-width: 46em; padding: 56px 20px 72px; margin: 0 auto; }
.document h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); }
.document h2 { font-size: 1.4rem; margin: 2em 0 .5em; }
.document .date { color: var(--encre-douce); }
.document ul { padding-left: 1.2em; }
.document li { margin: .35em 0; }
.document dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; }
.document dt { font-weight: 600; }
.document dd { margin: 0; }
@media (max-width: 560px) { .document dl { grid-template-columns: 1fr; } .document dd { margin-bottom: 8px; } }