/* ═══════════════════════════════════════════════════════════════════════════
   Vitrine OptiBot — myoptibot.com/optibot
   Palette calée sur le contexte "optibot" de la PWA (tokens.css) :
   encre #2C1442, accent #3D1576, gradient 135deg #2C1442 → #3D1576.
   Page statique, zéro framework — mêmes fondamentaux que l'app (Segoe UI).
   Squelette repris de la vitrine Opti Academy (préfixe obv- au lieu de acv-).
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --obv-ink:        #2C1442;
  --obv-accent:     #3D1576;
  --obv-violet:     #6427B8;
  --obv-gradient:   linear-gradient(135deg, #2C1442, #3D1576 60%, #6427B8);

  --obv-bg:         #f8f6fb;
  --obv-surface:    #ffffff;
  --obv-text:       #221333;
  --obv-text-2:     #5d4a7d;
  --obv-muted:      #8f7fa8;
  --obv-border:     rgba(148, 128, 182, 0.35);
  --obv-border-sub: rgba(210, 200, 228, 0.5);
  --obv-accent-50:  #f1ebf9;

  --obv-radius:     14px;
  --obv-radius-sm:  9px;
  --obv-shadow:     0 4px 12px rgba(28, 6, 52, 0.08);
  --obv-shadow-lg:  0 12px 32px rgba(28, 6, 52, 0.16);
  --obv-font: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--obv-font);
  background: var(--obv-bg);
  color: var(--obv-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: var(--obv-accent); }

/* ═══════════════════════ NAV ═══════════════════════ */

.obv-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 10px clamp(16px, 4vw, 40px);
  background: rgba(248, 246, 251, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--obv-border-sub);
}

.obv-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--obv-ink);
  font-size: 17px;
  white-space: nowrap;
}
.obv-nav-brand img { border-radius: 8px; }
.obv-nav-brand strong { font-weight: 700; }

.obv-nav-links {
  display: flex;
  gap: 18px;
  margin-left: auto;
}
.obv-nav-links a {
  text-decoration: none;
  color: var(--obv-text-2);
  font-size: 14px;
  padding: 6px 2px;
}
.obv-nav-links a:hover { color: var(--obv-ink); }

.obv-nav-cta {
  text-decoration: none;
  background: var(--obv-ink);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.obv-nav-cta:hover { transform: translateY(-1px); box-shadow: var(--obv-shadow); }

@media (max-width: 720px) {
  .obv-nav-links { display: none; }
  .obv-nav-cta { margin-left: auto; }
}

/* ═══════════════════════ HERO ═══════════════════════ */

.obv-hero {
  background: var(--obv-gradient);
  color: #fff;
  padding: clamp(48px, 8vw, 88px) clamp(16px, 4vw, 40px) clamp(56px, 8vw, 96px);
}

.obv-hero-inner {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.obv-hero-kicker {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 22px;
}

.obv-hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.5px;
}
.obv-hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, #d9c4ff, #9d7bff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.obv-hero-sub {
  font-size: clamp(15px, 2.2vw, 18px);
  color: rgba(255, 255, 255, 0.88);
  max-width: 660px;
  margin: 18px auto 30px;
}
.obv-hero-sub strong { color: #fff; }

.obv-hero-trust {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-top: 24px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.82);
}

/* ═══════════════════ CHAT DE DÉMO ═══════════════════ */

.obv-chat {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--obv-radius);
  box-shadow: var(--obv-shadow-lg);
  overflow: hidden;
  text-align: left;
}

.obv-chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--obv-border-sub);
  background: #fff;
}
.obv-chat-head img { border-radius: 8px; flex: none; }
.obv-chat-head-txt {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.obv-chat-head-txt strong { color: var(--obv-ink); font-size: 15px; }
.obv-chat-head-txt span {
  font-size: 12px;
  color: var(--obv-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.obv-chat-status {
  margin-left: auto;
  font-size: 12px;
  color: #1e8e5a;
  white-space: nowrap;
}

.obv-chat-messages {
  height: min(52vh, 400px);
  min-height: 260px;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #faf8fd;
}

/* Bulles */
.obv-msg {
  max-width: 88%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14.5px;
  overflow-wrap: break-word;
}
.obv-msg-user {
  align-self: flex-end;
  background: var(--obv-gradient);
  color: #fff;
  border-bottom-right-radius: 4px;
  white-space: pre-wrap;
}
.obv-msg-bot {
  align-self: flex-start;
  background: #fff;
  border: 1px solid var(--obv-border-sub);
  color: var(--obv-text);
  border-bottom-left-radius: 4px;
}
.obv-msg-note {
  align-self: center;
  background: var(--obv-accent-50);
  color: var(--obv-text-2);
  font-size: 13px;
  text-align: center;
}

/* Markdown dans les bulles bot */
.obv-msg-bot p { margin: 0 0 8px; }
.obv-msg-bot p:last-child { margin-bottom: 0; }
.obv-msg-bot h1, .obv-msg-bot h2, .obv-msg-bot h3, .obv-msg-bot h4 {
  color: var(--obv-ink);
  margin: 12px 0 6px;
  line-height: 1.3;
}
.obv-msg-bot h1 { font-size: 17px; }
.obv-msg-bot h2 { font-size: 16px; }
.obv-msg-bot h3, .obv-msg-bot h4 { font-size: 15px; }
.obv-msg-bot ul, .obv-msg-bot ol { margin: 0 0 8px; padding-left: 22px; }
.obv-msg-bot li { margin-bottom: 3px; }
.obv-msg-bot code {
  background: var(--obv-accent-50);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 13px;
  font-family: Consolas, Monaco, monospace;
}
.obv-msg-bot pre {
  background: #241536;
  color: #f0e9fb;
  border-radius: 8px;
  padding: 10px 12px;
  overflow-x: auto;
  margin: 0 0 8px;
}
.obv-msg-bot pre code { background: none; color: inherit; padding: 0; }
.obv-msg-bot .obv-table-wrap { overflow-x: auto; margin: 0 0 8px; }
.obv-msg-bot table {
  border-collapse: collapse;
  font-size: 13px;
  min-width: 60%;
}
.obv-msg-bot th, .obv-msg-bot td {
  border: 1px solid var(--obv-border-sub);
  padding: 5px 9px;
  text-align: left;
  vertical-align: top;
}
.obv-msg-bot th { background: var(--obv-accent-50); color: var(--obv-ink); }
.obv-msg-bot hr { border: none; border-top: 1px solid var(--obv-border-sub); margin: 10px 0; }
.obv-msg-bot a { color: var(--obv-accent); }

/* Indicateur de frappe */
.obv-typing {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  padding: 4px 2px;
}
.obv-typing i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--obv-muted);
  animation: obvBlink 1.2s infinite;
}
.obv-typing i:nth-child(2) { animation-delay: 0.2s; }
.obv-typing i:nth-child(3) { animation-delay: 0.4s; }
@keyframes obvBlink { 0%, 80%, 100% { opacity: 0.25; } 40% { opacity: 1; } }

/* Chips de questions d'exemple (état vide du chat) */
.obv-chat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.obv-chat-chip {
  border: 1px solid var(--obv-border);
  background: #fff;
  color: var(--obv-accent);
  font-family: inherit;
  font-size: 13px;
  text-align: left;
  padding: 7px 13px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.obv-chat-chip:hover { background: var(--obv-accent); color: #fff; }

/* Quota / hint sous une réponse */
.obv-chat-hint {
  align-self: center;
  font-size: 12.5px;
  color: var(--obv-muted);
  text-align: center;
}
.obv-chat-hint button {
  border: none;
  background: none;
  color: var(--obv-accent);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}

/* Bandeau de verrouillage (quota atteint) */
.obv-chat-lock {
  padding: 12px 16px;
  background: var(--obv-accent-50);
  border-top: 1px solid var(--obv-border-sub);
  font-size: 13.5px;
  color: var(--obv-text-2);
  text-align: center;
}
.obv-chat-lock[hidden] { display: none; }
.obv-chat-lock strong { color: var(--obv-ink); }
.obv-lock-btn {
  margin-top: 10px;
  font-size: 14px;
  padding: 10px 24px;
}

/* Barre de saisie */
.obv-chat-inputrow {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 12px 14px;
  border-top: 1px solid var(--obv-border-sub);
  background: #fff;
}
.obv-chat-inputrow textarea {
  flex: 1;
  min-width: 0;
  resize: none;
  border: 1px solid var(--obv-border);
  border-radius: 12px;
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.4;
  padding: 10px 13px;
  max-height: 120px;
  outline: none;
  color: var(--obv-text);
  background: #fff;
}
.obv-chat-inputrow textarea:focus { border-color: var(--obv-accent); }
.obv-chat-inputrow button {
  flex: none;
  border: none;
  background: var(--obv-gradient);
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: filter 0.15s ease;
}
.obv-chat-inputrow button:hover { filter: brightness(1.15); }
.obv-chat-inputrow button:disabled { opacity: 0.55; cursor: default; }

.obv-chat-note {
  font-size: 11.5px;
  color: var(--obv-muted);
  text-align: center;
  padding: 0 14px 10px;
  background: #fff;
}

/* ═══════════════════════ SECTIONS ═══════════════════════ */

.obv-section {
  padding: clamp(48px, 7vw, 84px) clamp(16px, 4vw, 40px);
  max-width: 1060px;
  margin: 0 auto;
}
.obv-section-alt {
  max-width: none;
  background: #fff;
  border-top: 1px solid var(--obv-border-sub);
  border-bottom: 1px solid var(--obv-border-sub);
}
.obv-section-alt > * { max-width: 1060px; margin-left: auto; margin-right: auto; }

.obv-section h2 {
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 800;
  color: var(--obv-ink);
  text-align: center;
  letter-spacing: -0.3px;
}
.obv-section-sub {
  text-align: center;
  color: var(--obv-text-2);
  font-size: 15.5px;
  max-width: 620px;
  margin: 12px auto 40px;
}

/* Étapes (section « Spécialisé, pas générique ») */
.obv-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.obv-step {
  background: var(--obv-surface);
  border: 1px solid var(--obv-border-sub);
  border-radius: var(--obv-radius);
  padding: 26px 22px;
  box-shadow: var(--obv-shadow);
}
.obv-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--obv-gradient);
  color: #fff;
  font-weight: 700;
  margin-bottom: 14px;
}
.obv-step h3 { font-size: 17px; color: var(--obv-ink); margin-bottom: 8px; }
.obv-step p { font-size: 14px; color: var(--obv-text-2); }

/* Fonctionnalités / écosystème */
.obv-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.obv-feature {
  background: var(--obv-bg);
  border: 1px solid var(--obv-border-sub);
  border-radius: var(--obv-radius);
  padding: 22px;
}
.obv-feature-ico { font-size: 26px; display: block; margin-bottom: 10px; }
.obv-feature h3 { font-size: 16px; color: var(--obv-ink); margin-bottom: 6px; }
.obv-feature h3 a { color: inherit; }
.obv-feature p { font-size: 13.5px; color: var(--obv-text-2); }

.obv-eco { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

/* Cards écosystème : logo produit centré + charte graphique de chaque outil
   (OptiBot violet #3D1576, Opti Gemba terre cuite #A43C24 / encre #0E133E,
   Opti Academy prune/or #5F2A56 / #CE915C, Opti' pour Excel vert Office). */
.obv-eco-card {
  text-align: center;
  background: #fff;
  border-top: 3px solid var(--eco-accent, var(--obv-accent));
  box-shadow: var(--obv-shadow);
}
.obv-eco-logo {
  display: block;
  width: 56px;
  height: 56px;
  margin: 2px auto 12px;
  border-radius: 12px;
  object-fit: contain;
}
.obv-eco-card h3 { color: var(--eco-ink, var(--obv-ink)); }
.obv-eco-optibot { --eco-accent: #3D1576; --eco-ink: #2C1442; }
.obv-eco-gemba   { --eco-accent: #A43C24; --eco-ink: #0E133E; }
.obv-eco-academy { --eco-accent: #CE915C; --eco-ink: #3C1E43; }
.obv-eco-excel   { --eco-accent: #217346; --eco-ink: #185A34; }

/* Cas d'usage (chips-questions) */
.obv-usages {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 900px;
  margin: 0 auto;
}
.obv-usages button {
  border: 1px solid var(--obv-border);
  background: var(--obv-bg);
  color: var(--obv-accent);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.obv-usages button:hover {
  background: var(--obv-accent);
  color: #fff;
  transform: translateY(-1px);
}

/* Pricing / CTA */
.obv-pricing { text-align: center; max-width: 620px; margin: 0 auto; }
.obv-pricing p { color: var(--obv-text-2); font-size: 15.5px; margin: 14px 0 26px; }
.obv-pricing-note { font-size: 13px !important; color: var(--obv-muted) !important; margin-top: 18px !important; }

.obv-btn-primary {
  border: none;
  background: var(--obv-gradient);
  color: #fff;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(61, 21, 118, 0.35);
  transition: transform 0.15s ease, filter 0.15s ease;
}
.obv-btn-primary:hover { transform: translateY(-2px); filter: brightness(1.1); }
.obv-btn-primary:disabled { opacity: 0.6; cursor: default; transform: none; }

/* FAQ */
.obv-faq { max-width: 760px; margin: 0 auto; }
.obv-faq details {
  background: var(--obv-bg);
  border: 1px solid var(--obv-border-sub);
  border-radius: var(--obv-radius-sm);
  margin-bottom: 10px;
  padding: 0 18px;
}
.obv-faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  color: var(--obv-ink);
  padding: 15px 0;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
.obv-faq summary::-webkit-details-marker { display: none; }
.obv-faq summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--obv-accent);
}
.obv-faq details[open] summary::after { content: "–"; }
.obv-faq details p { padding: 0 0 16px; font-size: 14px; color: var(--obv-text-2); }

/* CTA final */
.obv-final {
  background: var(--obv-gradient);
  color: #fff;
  text-align: center;
  padding: clamp(48px, 7vw, 80px) 20px;
}
.obv-final h2 { font-size: clamp(24px, 3.6vw, 34px); font-weight: 800; }
.obv-final p { margin: 10px 0 26px; color: rgba(255, 255, 255, 0.85); }
.obv-btn-light {
  background: #fff;
  color: var(--obv-ink);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

/* ═══════════════════════ FOOTER ═══════════════════════ */

.obv-footer {
  background: var(--obv-ink);
  color: rgba(255, 255, 255, 0.75);
  font-size: 13.5px;
  padding: 26px clamp(16px, 4vw, 40px);
}
.obv-footer-inner {
  max-width: 1060px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}
.obv-footer a { color: #fff; }
.obv-footer nav { display: flex; flex-wrap: wrap; gap: 18px; }

/* ═══════════════════════ MODALE ═══════════════════════ */

.obv-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(44, 20, 66, 0.55);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
/* display:flex ci-dessus écrase le display:none que le navigateur applique à
   [hidden] (les règles auteur priment sur les règles UA) — sans cette règle,
   la modale s'affiche dès le chargement de la page. */
.obv-modal-backdrop[hidden] { display: none; }

.obv-modal {
  position: relative;
  background: #fff;
  border-radius: var(--obv-radius);
  box-shadow: var(--obv-shadow-lg);
  max-width: 440px;
  width: 100%;
  padding: 30px 28px 26px;
  text-align: center;
}

.obv-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: none;
  background: var(--obv-accent-50);
  color: var(--obv-text-2);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  cursor: pointer;
}

.obv-modal-topic {
  display: inline-block;
  background: var(--obv-accent-50);
  color: var(--obv-accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 14px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.obv-modal h3 { font-size: 20px; color: var(--obv-ink); margin-bottom: 8px; }
.obv-modal-sub { font-size: 14px; color: var(--obv-text-2); margin-bottom: 18px; }

.obv-modal input[type="email"] {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  padding: 12px 14px;
  border: 1px solid var(--obv-border);
  border-radius: var(--obv-radius-sm);
  margin-bottom: 12px;
  outline: none;
}
.obv-modal input[type="email"]:focus { border-color: var(--obv-accent); }

.obv-modal-tos {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  text-align: left;
  font-size: 12.5px;
  color: var(--obv-text-2);
  margin-bottom: 16px;
}
.obv-modal-tos input { margin-top: 3px; }

.obv-modal form .obv-btn-primary { width: 100%; font-size: 15px; }

.obv-modal-error {
  color: #b3261e;
  font-size: 13px;
  margin-top: 12px;
}

.obv-modal-sent-ico { font-size: 42px; margin-bottom: 8px; }
.obv-modal-hint { font-size: 12.5px; color: var(--obv-muted); }

/* Réduction des animations si demandé par l'OS */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}