:root {
  color-scheme: light dark;
  --bg: #0b0e14;
  --bg-alt: #131826;
  --fg: #e8ecf4;
  --fg-muted: #9aa4b8;
  --accent: #4f8cff;
  --accent-fg: #ffffff;
  --border: #232a3b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}

/* Même couleur (bleu du logo) pour un lien cliquable et déjà visité —
   le bleu/violet par défaut du navigateur tranchait trop sur le fond
   sombre. :where() ramène la spécificité de ce sélecteur à zéro : sans
   ça, "a:visited" (0,1,1) bat une classe seule comme .cta (0,1,0) — un
   lien visité aurait gagné sur .cta/.nav-link/.brand malgré leur classe
   dédiée. Piège découvert en conditions réelles (Raphaël), pas visible
   dans les DevTools : les navigateurs mentent volontairement sur
   getComputedStyle() pour :visited (anti-pistage de l'historique). */
:where(a, a:visited) { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  max-width: 1080px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.01em;
  margin-right: auto;
  color: var(--fg);
  text-decoration: none;
}

/* Taille pilotée ici (pas par les attributs width/height du SVG dans le
   HTML, qui restent en 22 pour un rendu correct avant chargement de la
   feuille de style) — un seul endroit à changer pour les 12 pages du
   site plutôt que 12 attributs inline. */
.brand-mark { flex-shrink: 0; width: 34px; height: 34px; }

.nav-link {
  color: var(--fg-muted);
  text-decoration: none;
}
.nav-link:hover { color: var(--fg); }

.lang-switcher { display: flex; gap: 0.6rem; margin-left: 0.5rem; }
.lang-switcher a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.lang-switcher a:hover { color: var(--fg); }
.lang-switcher a.lang-current { color: var(--accent); }

/* Menu mobile : case à cocher invisible + <label> hamburger, sans JS
   (cohérent avec le reste du site, presque entièrement statique). Sur
   desktop, .nav-links est un simple conteneur flex transparent : le
   rendu est identique à avant son introduction. */
.nav-toggle-input {
  /* "visually hidden" plutôt qu'un simple opacity:0 : Firefox continue
     de rendre la case native (bordure visible) dans ce dernier cas —
     constaté en conditions réelles. Reste focusable au clavier. */
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  margin-left: auto;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle-input:focus-visible ~ .nav-toggle {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

@media (max-width: 720px) {
  .nav { flex-wrap: wrap; }
  .nav-toggle { display: flex; }

  .nav-links {
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.25s ease, opacity 0.2s ease;
  }
  .nav-links .nav-link {
    padding: 0.85rem 0.25rem;
    border-top: 1px solid var(--border);
  }
  .nav-links .lang-switcher {
    padding: 0.85rem 0.25rem 0.25rem;
    margin-left: 0;
    gap: 1.25rem;
  }

  .nav-toggle-input:checked ~ .nav-links {
    max-height: 480px;
    opacity: 1;
    margin-top: 0.5rem;
  }
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

.hero {
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
  border-bottom: 1px solid var(--border);
}

.hero-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
  text-align: center;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.lead {
  color: var(--fg-muted);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.cta {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-fg);
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  transition: opacity 0.15s;
}
.cta:hover { opacity: 0.9; }

main { max-width: 1080px; margin: 0 auto; padding: 0 2rem; }

.story {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 2rem 0;
  text-align: center;
  font-size: 1.05rem;
  color: var(--fg-muted);
}
.story strong { color: var(--fg); }

.benefits { padding: 3rem 0 1rem; text-align: center; }
.benefits h2 { margin-bottom: 1.5rem; }
.benefits ul {
  list-style: none;
  max-width: 640px;
  margin: 0 auto;
  padding: 0;
  display: grid;
  gap: 1rem;
  text-align: left;
}
.benefits li {
  position: relative;
  padding-left: 1.6rem;
  color: var(--fg-muted);
}
.benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.usecases { padding: 4rem 0 1rem; text-align: center; }
.usecases h2 { margin-bottom: 0.5rem; }
.section-lead {
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

.usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  text-align: left;
}

.usecase h3 { margin-bottom: 0.5rem; }
.usecase p { color: var(--fg-muted); margin: 0; }

.how { padding: 3rem 0; text-align: center; }
.how h2 { margin-bottom: 2.5rem; }

.how-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: left;
  margin-bottom: 2rem;
}

.how-step { display: flex; gap: 1rem; align-items: flex-start; }
.how-number {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 700;
  font-size: 0.9rem;
}
.how-step p { margin: 0; color: var(--fg-muted); }

.how-detail {
  max-width: 640px;
  margin: 0 auto;
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.how pre { max-width: 640px; margin: 1rem auto; }

.pricing { padding: 3rem 0 5rem; text-align: center; }
.pricing h2 { margin-bottom: 2rem; }

.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.plan {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  background: var(--bg-alt);
  text-align: left;
  display: flex;
  flex-direction: column;
}

.plan h3 { margin-top: 0; }

.billing-toggle { display: flex; gap: 0.4rem; margin: 0.75rem 0 0; }
.toggle-btn {
  flex: 1;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-muted);
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
}
.toggle-btn.active { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

.plan .price { font-size: 1.5rem; font-weight: 700; margin: 0.5rem 0 0.25rem; }
.plan .price-detail { color: var(--fg-muted); font-size: 0.9rem; margin: 0 0 1.25rem; }
.plan ul { padding-left: 1.1rem; color: var(--fg-muted); margin-bottom: 1.5rem; flex-grow: 1; }
.plan-note { color: var(--fg-muted); font-size: 0.85rem; margin: -1rem 0 1.25rem; }
.plan .cta { display: block; text-align: center; }

.pricing-note {
  color: var(--fg-muted);
  font-size: 0.95rem;
  margin-top: 2rem;
}

.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--bg-alt);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  font-weight: 500;
}

.contact { text-align: center; padding: 3rem 0 5rem; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--bg-alt);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}
pre {
  text-align: left;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.5;
  white-space: pre;
}

footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 2rem;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.success {
  max-width: 560px;
  margin: 0 auto;
  padding: 6rem 2rem;
  text-align: center;
}
.success h1 { font-size: 1.75rem; }
.success p { color: var(--fg-muted); }
.success .cta { margin-top: 1.5rem; }

.page-header {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 2rem 1rem;
  text-align: center;
}
.page-header h1 { font-size: 1.75rem; }

.faq {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 2rem 5rem;
}
.faq-item { margin-bottom: 2rem; }

.ecosystem { padding: 1rem 2rem 3rem; text-align: center; }
.ecosystem h2 { margin-bottom: 1.5rem; }
.ecosystem-scroll {
  overflow-x: auto;
  padding-bottom: 0.5rem;
}
.ecosystem-diagram {
  display: block;
  width: 100%;
  min-width: 800px;
  max-width: 1000px;
  height: auto;
  margin: 0 auto;
}
.faq-item h3 { margin-bottom: 0.5rem; }
.faq-item p { color: var(--fg-muted); margin: 0; }