/* Site vitrine iVancIA : style Premium Marine, ambiance Marine Nuit et bouton Rubis (21-DESIGN). Aucune police ni bibliothèque extérieure. */
:root {
  --nuit-1: #2c2ca6; --nuit-2: #16166e; --nuit-3: #090934;
  --marine: #1B1B84; --marine-vif: #2B2BAE;
  --texte-n: #F2F3FA; --gris-n: #A9ACD6;
  --ivoire: #F7F6F2; --encre: #15162E; --gris: #5B5E78;
  --or: #C9A35B; --rubis: #F80000; --rubis-fonce: #a80000;
  --rayon: 20px;
  --police: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--police); color: var(--encre); background: var(--ivoire); line-height: 1.6; font-size: 17px; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
.enveloppe { width: min(1120px, 100% - 32px); margin-inline: auto; }
/* Règle de marque (21-DESIGN/CHARTE.md) : « IA » de iVancIA toujours en rouge du logo ; blanc gras sur fond rouge */
.ia-rouge { color: var(--rubis); }
.btn-rubis .ia-rouge, .rouge-fond .ia-rouge { color: #fff; font-weight: 800; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- Bandeau du haut ---------- */
.entete { position: sticky; top: 0; z-index: 20; background: rgba(9, 9, 52, .82); backdrop-filter: saturate(140%) blur(12px); -webkit-backdrop-filter: saturate(140%) blur(12px); border-bottom: 1px solid rgba(255,255,255,.08); }
.entete .enveloppe { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.entete .marque img { width: 132px; filter: drop-shadow(0 3px 10px rgba(0,0,0,.45)); }
.menu { display: flex; align-items: center; gap: 26px; }
.menu a { color: #DADCF7; text-decoration: none; font-size: 15px; font-weight: 600; }
.menu a:hover { color: #fff; }
.menu .btn { padding: 10px 18px; font-size: 15px; }
@media (max-width: 760px) { .menu a:not(.btn) { display: none; } .entete .marque img { width: 112px; } .menu .btn { padding: 9px 15px; font-size: 14px; } }
@media (max-width: 600px) { .accueil .chapo { font-size: 17px; } .accueil .logo-grand { width: 300px; } }

/* ---------- Boutons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border-radius: 999px; padding: 15px 26px; font-weight: 750; font-size: 17px; text-decoration: none; border: 0; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-rubis { color: #fff !important; background: linear-gradient(160deg, #ff3b3b, var(--rubis) 45%, #c40000); box-shadow: 0 10px 26px rgba(248,0,0,.38), inset 0 1px 0 rgba(255,255,255,.35); }
.btn-verre { color: #fff; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.22); }
.btn-marine { color: #fff; background: linear-gradient(135deg, var(--marine-vif), var(--marine)); box-shadow: 0 10px 24px rgba(27,27,132,.3); }

/* ---------- Parties sombres (Marine Nuit) ---------- */
.nuit { color: var(--texte-n); background: radial-gradient(120% 70% at 50% 0%, var(--nuit-1) 0%, var(--nuit-2) 45%, var(--nuit-3) 100%); position: relative; overflow: hidden; }
.nuit .gris { color: var(--gris-n); }
.etiquette { display: inline-block; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; font-weight: 700; color: var(--or); margin-bottom: 14px; }

/* ---------- Accueil ---------- */
.accueil { padding: 72px 0 96px; }
.accueil::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(70% 60% at 50% 30%, #000, transparent); -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000, transparent); pointer-events: none; }
.accueil .enveloppe { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.accueil .logo-grand { width: min(460px, 100%); filter: drop-shadow(0 8px 22px rgba(0,0,0,.5)); margin-bottom: 30px; }
.accueil h1 { font-size: clamp(34px, 4.6vw, 54px); line-height: 1.1; margin: 0 0 20px; letter-spacing: -.02em; font-weight: 800; }
.accueil h1 em { font-style: normal; background: linear-gradient(120deg, #fff, #c9ccff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.accueil .chapo { font-size: 19px; color: #D4D6F2; max-width: 34em; margin: 0 0 32px; }
.accueil .chapo strong { color: #fff; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; }
.accueil .petit { margin-top: 18px; font-size: 14px; }

/* Téléphone dessiné, avec une demande à la voix (noms fictifs) */
.telephone { width: 300px; max-width: 100%; margin-inline: auto; aspect-ratio: 300 / 600; border-radius: 44px; padding: 12px; background: linear-gradient(145deg, #3a3d55, #0e0f1c); box-shadow: 0 40px 80px rgba(0,0,20,.6), inset 0 0 0 1.5px rgba(255,255,255,.12); position: relative; }
.telephone .ecran { height: 100%; border-radius: 34px; overflow: hidden; display: flex; flex-direction: column; background: radial-gradient(130% 60% at 50% 0%, #2c2ca6 0%, #16166e 42%, #090934 100%); padding: 40px 16px 18px; gap: 12px; }
.telephone .encoche { position: absolute; top: 22px; left: 50%; transform: translateX(-50%); width: 92px; height: 24px; border-radius: 14px; background: #05050f; }
.telephone .ecran > :not(.bas) { text-align: left; }
.haut-ecran { display: flex; align-items: center; justify-content: space-between; padding: 0 4px 2px; }
.haut-ecran img { width: 78px; filter: drop-shadow(0 2px 6px rgba(0,0,0,.4)); }
.haut-ecran span { font-size: 12px; font-weight: 650; color: #C9CCF0; }
/* Ce que la personne a dit, avec l'onde de la voix */
.dicte { border-radius: 20px; padding: 14px 16px; background: linear-gradient(160deg, rgba(255,255,255,.13), rgba(255,255,255,.04)); border: 1px solid rgba(255,255,255,.16); box-shadow: inset 0 1px 0 rgba(255,255,255,.12); }
.dicte-tete { display: flex; align-items: center; gap: 10px; font-size: 11px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; color: #ffb3b3; }
.dicte p { margin: 8px 0 0; font-size: 15px; line-height: 1.45; color: #fff; font-style: italic; }
.onde { display: inline-flex; align-items: center; gap: 3px; height: 16px; }
.onde i { width: 3px; border-radius: 2px; background: #ff5a5a; animation: barre 1s ease-in-out infinite; }
.onde i:nth-child(1) { height: 7px; animation-delay: -.2s; } .onde i:nth-child(2) { height: 13px; animation-delay: -.5s; } .onde i:nth-child(3) { height: 16px; } .onde i:nth-child(4) { height: 11px; animation-delay: -.7s; } .onde i:nth-child(5) { height: 6px; animation-delay: -.35s; }
@keyframes barre { 0%, 100% { transform: scaleY(.45); } 50% { transform: scaleY(1); } }
/* La réponse d'iVancIA, comme une fiche bien rangée */
.resultat { border-radius: 22px; padding: 16px; background: #fff; color: var(--encre); box-shadow: 0 18px 36px rgba(0,0,20,.45); }
.resultat-tete { display: flex; align-items: center; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid #ECEBF2; }
.resultat-tete b { display: block; font-size: 15px; }
.resultat-tete small { display: block; font-size: 12px; color: var(--gris); }
.coche { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; flex: none; color: #fff; background: linear-gradient(135deg, #17a865, #0E7A4A); box-shadow: 0 6px 14px rgba(14,122,74,.35); }
.coche svg { width: 18px; height: 18px; }
.resultat dl { margin: 10px 0 12px; display: grid; gap: 7px; }
.resultat dl div { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; }
.resultat dt { color: var(--gris); }
.resultat dd { margin: 0; font-weight: 650; text-align: right; }
.lu { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 650; color: var(--marine); background: #EEEEF8; border-radius: 999px; padding: 5px 10px; }
.lu svg { width: 14px; height: 14px; }
@media (prefers-reduced-motion: reduce) { .onde i { animation: none; } }
.telephone .bas { margin-top: auto; display: flex; flex-direction: column; align-items: center; gap: 8px; font-size: 12px; color: var(--gris-n); }

/* Le bouton Rubis, avec son battement de cœur */
.rubis { width: 86px; height: 86px; border-radius: 50%; display: grid; place-items: center; position: relative; color: #fff; background: radial-gradient(circle at 34% 28%, #ff6a6a 0%, var(--rubis) 42%, var(--rubis-fonce) 100%); box-shadow: inset 0 -6px 14px rgba(80,0,0,.45), inset 0 4px 8px rgba(255,255,255,.35), 0 12px 28px rgba(248,0,0,.45); animation: coeur 1.6s ease-in-out infinite; }
.rubis::after { content: ""; position: absolute; top: 8%; left: 21%; width: 41%; height: 20%; border-radius: 50%; background: linear-gradient(rgba(255,255,255,.55), rgba(255,255,255,0)); }
.rubis::before { content: ""; position: absolute; inset: 0; border-radius: 50%; background: rgba(248,0,0,.45); animation: onde 1.8s ease-out infinite; z-index: -1; }
.rubis svg { width: 38%; height: 38%; position: relative; z-index: 1; }
@keyframes coeur { 0%, 100% { transform: scale(1); } 14% { transform: scale(1.06); } 28% { transform: scale(1); } 42% { transform: scale(1.04); } 70% { transform: scale(1); } }
@keyframes onde { 0% { transform: scale(1); opacity: .8; } 100% { transform: scale(1.7); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .rubis, .rubis::before { animation: none; } html { scroll-behavior: auto; } }

@media (max-width: 900px) {
  .accueil { padding: 44px 0 64px; }
  .accueil .enveloppe { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .accueil .logo-grand { margin-inline: auto; }
  .accueil .chapo { margin-inline: auto; }
  .actions { justify-content: center; }
}

/* ---------- Sections ---------- */
section.partie { padding: 88px 0; }
main section[id] { scroll-margin-top: 68px; }
.titre-partie { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.titre-partie h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.15; margin: 0 0 14px; letter-spacing: -.015em; }
.titre-partie p { margin: 0; color: var(--gris); font-size: 18px; }
.nuit .titre-partie p { color: var(--gris-n); }
@media (max-width: 600px) { section.partie { padding: 60px 0; } }

/* Trois étapes */
.etapes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: e; }
.etape { background: #fff; border-radius: var(--rayon); padding: 30px 26px; box-shadow: 0 1px 0 rgba(21,22,46,.04), 0 18px 40px rgba(21,22,46,.07); position: relative; }
.etape::before { counter-increment: e; content: counter(e); position: absolute; top: 22px; right: 24px; font-size: 54px; font-weight: 800; line-height: 1; color: rgba(27,27,132,.08); }
.etape h3 { margin: 18px 0 8px; font-size: 21px; }
.etape p { margin: 0; color: var(--gris); }
.pastille { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg, #3c3cc8, var(--marine)); box-shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 8px 18px rgba(27,27,132,.3); }
.pastille.rouge { background: radial-gradient(circle at 34% 28%, #ff6a6a, var(--rubis) 50%, var(--rubis-fonce)); box-shadow: 0 8px 18px rgba(248,0,0,.3); }
.pastille.verte { background: linear-gradient(135deg, #17a865, #0E7A4A); box-shadow: 0 8px 18px rgba(14,122,74,.3); }
.pastille svg { width: 26px; height: 26px; }
@media (max-width: 820px) { .etapes { grid-template-columns: 1fr; } }

/* Fonctions, cartes en verre sur fond nuit */
.fonctions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.verre { background: linear-gradient(160deg, rgba(255,255,255,.11), rgba(255,255,255,.035)); border: 1px solid rgba(255,255,255,.14); box-shadow: 0 14px 34px rgba(0,0,20,.35), inset 0 1px 0 rgba(255,255,255,.12); border-radius: var(--rayon); }
.fonction { padding: 28px 24px; }
.fonction h3 { margin: 18px 0 8px; font-size: 19px; color: #fff; }
.fonction p { margin: 0; color: var(--gris-n); font-size: 16px; }
@media (max-width: 900px) { .fonctions { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .fonctions { grid-template-columns: 1fr; } }

/* Pour qui */
.publics { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.public { background: #fff; border-radius: var(--rayon); padding: 34px 32px; box-shadow: 0 18px 40px rgba(21,22,46,.07); border-top: 4px solid var(--marine); }
.public.salarie { border-top-color: var(--rubis); }
.public h3 { margin: 0 0 6px; font-size: 23px; }
.public .sous { margin: 0 0 18px; color: var(--gris); }
.coches { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.coches li { padding-left: 32px; position: relative; }
.coches li::before { content: ""; position: absolute; left: 0; top: 4px; width: 20px; height: 20px; border-radius: 50%; background: #E7E8F7 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='%231B1B84' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 20px no-repeat; }
@media (max-width: 760px) { .publics { grid-template-columns: 1fr; } .public { padding: 28px 22px; } }

/* Télécharger l'appli Android */
.telechargements { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.appli { display: flex; gap: 22px; align-items: flex-start; padding: 28px 26px; }
.appli img { width: 84px; height: 84px; border-radius: 20px; flex: none; box-shadow: 0 10px 24px rgba(0,0,20,.45); }
.appli h3 { margin: 8px 0 6px; font-size: 22px; color: #fff; }
.appli p { margin: 0 0 18px; color: var(--gris-n); font-size: 16px; }
.appli.salaries { border-color: rgba(248,0,0,.45); }
.boutons-appli { display: flex; flex-wrap: wrap; gap: 10px; }
.boutons-appli .btn { padding: 12px 20px; font-size: 15px; }
.badge { display: inline-block; font-size: 12px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; background: rgba(248,0,0,.18); color: #ffb3b3; }
.badge.demo { background: rgba(201,163,91,.18); color: #e9cf9b; }
.installer { margin-top: 22px; padding: 26px 28px; }
.installer h3 { margin: 0 0 10px; color: #fff; font-size: 19px; }
.installer ol { margin: 0 0 12px; padding-left: 22px; color: #DADCF7; display: grid; gap: 6px; }
.installer strong { color: #fff; }
.installer p { margin: 0; font-size: 15px; }
@media (max-width: 820px) { .telechargements { grid-template-columns: 1fr; } }
@media (max-width: 460px) { .appli { flex-direction: column; } .appli .btn { width: 100%; } .appli > div { width: 100%; } }

/* Confiance */
.engagements { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.engagement { padding: 24px 20px; border-radius: var(--rayon); background: #fff; box-shadow: 0 14px 32px rgba(21,22,46,.06); }
.engagement strong { display: block; font-size: 17px; margin-bottom: 6px; }
.engagement span { color: var(--gris); font-size: 15px; }
@media (max-width: 900px) { .engagements { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .engagements { grid-template-columns: 1fr; } }

/* Appel à la démo et contact */
.appel { padding: 84px 0; text-align: center; }
.appel h2 { font-size: clamp(28px, 3.6vw, 42px); margin: 0 0 14px; line-height: 1.15; }
.appel p { color: #D4D6F2; font-size: 18px; max-width: 36em; margin: 0 auto 30px; }
.appel .actions { justify-content: center; }
.mail { font-size: clamp(20px, 3vw, 26px); font-weight: 750; color: #fff; text-decoration: none; border-bottom: 2px solid rgba(201,163,91,.7); }
.mail:hover { border-bottom-color: var(--or); }

/* ---------- Pied de page ---------- */
.pied { background: #06061f; color: #9EA1C9; padding: 44px 0 36px; font-size: 15px; }
.pied .enveloppe { display: flex; flex-wrap: wrap; gap: 24px 40px; align-items: center; justify-content: space-between; }
.pied img { width: 120px; opacity: .95; }
.pied nav { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.pied a { color: #DADCF7; text-decoration: none; }
.pied a:hover { color: #fff; text-decoration: underline; }
.pied .signature { width: 100%; border-top: 1px solid rgba(255,255,255,.08); padding-top: 22px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; font-size: 14px; }
.pied .signature b { color: #DADCF7; letter-spacing: .04em; }

/* ---------- Pages de texte (mentions légales, confidentialité) ---------- */
.bandeau-page { padding: 56px 0 48px; }
.bandeau-page h1 { margin: 0; font-size: clamp(30px, 4vw, 44px); letter-spacing: -.015em; }
.bandeau-page p { margin: 10px 0 0; color: var(--gris-n); }
.texte { padding: 48px 0 80px; }
.texte .enveloppe { max-width: 820px; }
.texte h2 { font-size: 24px; margin: 44px 0 12px; color: var(--marine); }
.texte h3 { font-size: 19px; margin: 28px 0 8px; }
.texte p, .texte li { color: #2A2C47; }
.texte ul { padding-left: 22px; }
.texte .carte { background: #fff; border-radius: 16px; padding: 22px 24px; box-shadow: 0 10px 28px rgba(21,22,46,.06); }
.tableau { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 14px 0; border-radius: 14px; box-shadow: 0 10px 28px rgba(21,22,46,.06); }
.tableau table { border-collapse: collapse; width: 100%; min-width: 560px; background: #fff; font-size: 15px; }
.tableau th, .tableau td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid #ECEBF2; }
.tableau th { background: #EEEEF8; color: var(--marine); font-size: 14px; }
.tableau tr:last-child td { border-bottom: 0; }

/* Brouillon : ce qui reste à faire est bien visible. Voir LISEZ-MOI.md avant la mise en ligne. */
.a-completer { background: #FFF1B8; color: #6B4A00; border-radius: 6px; padding: 1px 6px; font-weight: 650; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.avertissement { border-left: 5px solid #E0A100; background: #FFF8DC; color: #4F3A00; border-radius: 12px; padding: 16px 20px; margin: 0 0 28px; font-size: 16px; }
.avertissement strong { color: #3B2B00; }