:root {
  --primary: #0d4c92;
  --primary-2: #0a386d;
  --accent: #21c6a7;
  --bg: #f6f9fb;
  --ink: #102a43;
  --muted: #5b708b;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(16, 42, 67, 0.12);
  --maxw: 1100px;
  --header-h: 64px;
  --focus: #21c6a7;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  font-family: ui-sans-serif, -apple-system, Segoe UI, Roboto, Arial, "Helvetica Neue", "Noto Sans", "Liberation Sans", sans-serif;
  color: var(--ink); background: var(--bg);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* Accessibilité focus */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; left: 16px; top: 16px; width: auto; height: auto;
  padding: 10px 14px; background: #fff; border: 2px solid var(--focus); border-radius: 10px;
  z-index: 1000;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: rgba(246, 249, 251, 0.8);
  border-bottom: 1px solid #e6edf3;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; min-height: var(--header-h);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--ink);
}

.brand-slogan {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.2;
}
.brand-logo {
  width: 36px; height: 36px; display: grid; place-items: center;
  border-radius: 10px; background: none;
  color: white; box-shadow: var(--shadow); font-size: 18px;
}
.brand-logo img {
  width: 40px;
  height: auto;
  display: block;
}

.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a.btn {
  padding: 10px 16px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: 600; box-shadow: var(--shadow);
  transition: transform .15s ease, background .2s ease;
}
.nav-links a.btn:hover { transform: translateY(-1px); background: var(--primary-2); }

.hero { position: relative; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; align-items: center; padding: 60px 0 40px; }
.hero h1 { font-size: clamp(28px, 4.2vw, 48px); line-height: 1.05; margin: 0 0 12px; }
.hero p.lead { font-size: clamp(16px, 2vw, 20px); color: var(--muted); margin: 0 0 22px; }
.ink-accent { color: var(--accent); }
.badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.badge { padding: 8px 12px; border-radius: 999px; background: #fff; border: 1px solid #e7eef5; color: var(--muted); font-weight: 600; font-size: 13px; }

.cta-group { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 10px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #18a58d);
  color: #063b34; border: none; padding: 14px 20px; border-radius: 14px; font-weight: 800; box-shadow: var(--shadow); cursor: pointer;
  transition: transform .15s ease;
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-link { border: none; background: transparent; font-weight: 700; color: var(--primary); text-decoration: underline; cursor: pointer; }

.hero-card { background: #fff; border: 1px solid #e6edf3; border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 12px; }
.stat { background: #f8fbfe; border-radius: 14px; padding: 12px; text-align: center; }
.stat b { font-size: 22px; display: block; }

/* Sections */
section { padding: 56px 0; scroll-margin-top: calc(var(--header-h) + 16px); }
h2 { font-size: clamp(22px, 3.2vw, 34px); margin: 0 0 12px; }
p.section-lead { color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); margin: 6px 0 0; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: #fff; border: 1px solid #e6edf3; border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.card h3 { margin: 6px 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin-top: 20px; }
.step { background: #ffffff; border: 1px dashed #d9e6f2; border-radius: 14px; padding: 14px; font-size: 14px; }
.step b { display: block; font-size: 12px; color: #57728f; letter-spacing: .6px; text-transform: uppercase; margin-bottom: 6px; }

/* Comparison */
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
.table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid #e6edf3; box-shadow: var(--shadow); }
.table th, .table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid #eef3f7; }
.table th { background: #f4f8fb; font-size: 14px; text-transform: uppercase; letter-spacing: .4px; color: #4c6580; }

.note { font-size: 13px; color: var(--muted); margin-top: 10px; }

/* Calculator */
.calc { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 20px; }
.input { display: grid; gap: 8px; }
.input label { font-weight: 700; font-size: 14px; }
.input input, .input select { padding: 12px; border-radius: 10px; border: 1px solid #dbe6ef; background: #fff; }
.result { background: #072f5f; color: #e7f4ff; border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.result b { font-size: 22px; }

/* FAQ */
.faq { margin-top: 18px; }
details { background: #fff; border: 1px solid #e6edf3; border-radius: 12px; padding: 14px 16px; margin-bottom: 10px; box-shadow: var(--shadow); }
summary { cursor: pointer; font-weight: 700; }
details[open] { border-color: #cfe3f5; }

/* Form */
.leadbox { background: #ffffff; border: 1px solid #e6edf3; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form .full { grid-column: 1 / -1; }
.form label { font-size: 13px; font-weight: 700; color: #3f566e; }
.form input, .form select, .form textarea { width: 100%; padding: 12px; border-radius: 10px; border: 1px solid #dbe6ef; }
.form button { margin-top: 6px; }
.legal { font-size: 12px; color: var(--muted); }

/* Footer */
footer { padding: 40px 0 60px; color: var(--muted); }

/* Responsive */
@media (max-width: 1200px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .comparison, .calc { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .hero-card { background: #fff; border: 1px solid #e6edf3; border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); font-size: small; }

}

/* Reduced motion */.hero-inner { grid-template-columns: 1fr; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Fallback si backdrop-filter non supporté */
@supports not ((backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px))) {
  header { background: rgba(246, 249, 251, 0.95); }
}

/* ======== NAV MOBILE & MARGES ======== */

/* Petite marge latérale sur mobile */
@media (max-width: 640px) {
  .container { padding-left: 14px; padding-right: 14px; } /* petite marge écran */
}

/* ====== NAV TOGGLE (Burger / Croix) ====== */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 42px;
  height: 42px;
  position: relative;
  cursor: pointer;
}

.nav-toggle .bar {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 3px;
  background: var(--ink);
  border-radius: 3px;
  transition: transform .3s ease, opacity .3s ease, top .3s ease;
}

/* Position des 3 barres */
.nav-toggle .bar:nth-child(1) { top: 12px; }
.nav-toggle .bar:nth-child(2) { top: 20px; }
.nav-toggle .bar:nth-child(3) { top: 28px; }

/* Quand le menu est ouvert → croix */
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
  top: 20px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
  top: 20px;
  transform: rotate(-45deg);
}

/* Menu desktop : inchangé */
.nav-links { display: flex; align-items: center; gap: 18px; }

/* Disposition mobile */
@media (max-width: 980px) {
  /* Affiche le hamburger, masque les liens initiaux */
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    left: 0; right: 0;
    top: var(--header-h);
    background: #ffffff;
    border-bottom: 1px solid #e6edf3;
    box-shadow: 0 12px 24px rgba(16,42,67,.08);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 14px;               /* menu 100% dans l'écran */
    transform: translateY(-120%); /* caché par défaut */
    transition: transform .2s ease;
    z-index: 60;
  }
  .nav-links a {
    padding: 12px 10px;
    border-radius: 10px;
  }
  .nav-links a:hover { background: #f6f9fb; }

  /* CTA sous les liens en mobile, largeur full */
  .nav-links .nav-cta {
    margin-top: 6px;
    width: 100%;
    text-align: center;
  }

  /* État ouvert */
  .nav-links.open { transform: translateY(0); }

  /* La topbar conserve l'espace entre brand et hamburger */
  .topbar { gap: 12px; }
}

/* Accessibilité : éviter le contenu caché atteignable au clavier quand menu fermé */
@media (max-width: 980px) {
  .nav-links:not(.open) a { pointer-events: none; }
}
/* ==== Overrides pour pages simples (nav non déroulant) ==== */
@media (max-width: 980px) {
  .page-simple-nav .nav-toggle { display: none !important; }

  .page-simple-nav .nav-links {
    position: static !important;
    transform: none !important;
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: flex-end;
    gap: 12px;
    padding: 0 !important;
    border: 0 !important;
    box-shadow: none !important;
    background: transparent !important;
  }

  /* Au cas où un bouton CTA serait présent dans ces pages */
  .page-simple-nav .nav-links .nav-cta {
    width: auto !important;
    margin-top: 0 !important;
  }
}