/* ==========================================================================
   Smart Indus Solutions — Feuille de styles
   Palette : bleu industriel + gris
   ========================================================================== */

:root {
  /* Palette alignée sur le logo Smart Indus Solutions (bleu marine) */
  --color-primary: #1F3A5F;
  --color-primary-dark: #15273F;
  --color-primary-light: #3D6CA8;
  --color-accent: #5A8BC4;

  --color-ink: #0F172A;
  --color-text: #334155;
  --color-muted: #64748B;
  --color-line: #E2E8F0;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F4F6FB;
  --color-surface-dark: #0F1A36;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(11, 61, 145, 0.10);
  --shadow-lg: 0 25px 60px rgba(11, 61, 145, 0.18);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* -------------------- Base -------------------- */
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }

.text-white-70 { color: rgba(255, 255, 255, 0.75); }
.text-white-70 a { color: rgba(255, 255, 255, 0.9); }
.text-white-70 a:hover { color: #fff; }

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  background: rgba(27, 110, 194, 0.08);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.eyebrow-light {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

/* -------------------- Buttons -------------------- */
.btn {
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.btn-lg { padding: 0.85rem 1.8rem; }

.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(11, 61, 145, 0.25);
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  color: #fff;
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(11, 61, 145, 0.35);
}

.btn-outline-secondary {
  color: var(--color-ink);
  border-color: var(--color-line);
  background: #fff;
}
.btn-outline-secondary:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-cta { padding: 0.55rem 1.2rem; }

/* -------------------- Navigation -------------------- */
.navbar {
  padding: 1rem 0;
  background: rgba(255, 255, 255, 0);
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: saturate(180%) blur(12px);
  box-shadow: var(--shadow-sm);
  padding: 0.6rem 0;
}

/* Fallback texte si assets/logo.png n'existe pas encore */
.brand-fallback {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-ink);
  text-decoration: none;
}
.brand-fallback i {
  flex-shrink: 0;
  display: inline-flex;
  width: 36px; height: 36px;
  border-radius: 9px;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  font-size: 1rem;
}
.brand-fallback-light { color: #fff; }

/* Logo Smart Indus Solutions — affiché quand le fichier existe */
.brand-logo {
  display: block;
  height: 44px;
  width: auto;
  max-width: 100%;
  transition: height var(--transition);
}
.navbar.scrolled .brand-logo { height: 38px; }

/* Version pied de page : logo blanc (filtre pour fond sombre) */
.brand-logo-footer {
  height: 50px;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}
@media (max-width: 575.98px) {
  .brand-logo { height: 38px; }
  .navbar.scrolled .brand-logo { height: 34px; }
}

.navbar .nav-link {
  color: var(--color-text);
  font-weight: 500;
  padding: 0.5rem 0.9rem !important;
  position: relative;
}
.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: var(--color-primary);
}
.navbar .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0.25rem;
  left: 0.9rem;
  right: 0.9rem;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* -------------------- Hero -------------------- */
.hero {
  position: relative;
  padding: 9rem 0 4rem;
  overflow: hidden;
  background: linear-gradient(180deg, #F4F8FF 0%, #FFFFFF 100%);
}
.min-vh-90 { min-height: 90vh; }

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(27, 110, 194, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(11, 61, 145, 0.10) 0%, transparent 50%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 61, 145, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 61, 145, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
}

.hero h1 {
  line-height: 1.1;
  margin-top: 0.5rem;
}

.hero-bullets li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  margin-bottom: 0.55rem;
  font-weight: 500;
}
.hero-bullets i { color: var(--color-primary); font-size: 1.15rem; }

/* Hero KPI cards */
.hero-card-stack {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-left: 1rem;
}
.hero-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 1.25rem 1.4rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-line);
  animation: float 6s ease-in-out infinite;
}
.hero-card-1 { transform: translateX(-1rem); animation-delay: 0s; }
.hero-card-2 { transform: translateX(1.5rem); animation-delay: -2s; }
.hero-card-3 { transform: translateX(-0.5rem); animation-delay: -4s; }

@keyframes float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -8px; }
}

.kpi-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  background: rgba(11, 61, 145, 0.10);
  color: var(--color-primary);
}
.kpi-icon-alt { background: rgba(77, 163, 255, 0.15); color: var(--color-primary-light); }
.kpi-icon-alt2 { background: rgba(34, 197, 94, 0.12); color: #16a34a; }
.kpi-value { font-weight: 700; font-size: 1.2rem; color: var(--color-ink); line-height: 1.2; }
.kpi-label { color: var(--color-muted); font-size: 0.88rem; }

/* -------------------- Value strip -------------------- */
.value-strip {
  background: var(--color-surface-alt);
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.value-stat .value-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.value-stat .value-lbl {
  color: var(--color-muted);
  font-size: 0.92rem;
  margin-top: 0.4rem;
}

/* -------------------- Sections -------------------- */
.section { padding: 6rem 0; }
.section-alt { background: var(--color-surface-alt); }
.section-dark {
  background: linear-gradient(135deg, var(--color-surface-dark) 0%, #1a2a52 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(77, 163, 255, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 100%, rgba(27, 110, 194, 0.15) 0%, transparent 50%);
  pointer-events: none;
}
.section-dark .container { position: relative; z-index: 1; }

.section-head { max-width: 760px; margin: 0 auto 2.5rem; }
.section-title { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 1rem; }
.section-sub { color: var(--color-muted); font-size: 1.1rem; }

/* -------------------- Labels de rangée services -------------------- */
.services-row-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-line);
}
.services-row-label i { font-size: 0.9rem; }

/* -------------------- Service cards -------------------- */
.service-card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
  position: relative;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(27, 110, 194, 0.35);
}

/* Carte mise en avant : IA Souveraine */
.service-card-featured {
  background: linear-gradient(160deg, #ffffff 0%, #eef4ff 100%);
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.service-card-featured::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}
.service-card-featured:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}
.featured-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  box-shadow: 0 4px 10px rgba(11, 61, 145, 0.30);
}
.featured-badge i { font-size: 0.75rem; }
.service-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 6px 14px rgba(11, 61, 145, 0.25);
}
.service-card h3 { font-size: 1.25rem; margin-bottom: 0.6rem; }
.service-card p { color: var(--color-text); margin-bottom: 1rem; }
.service-list { list-style: none; padding: 0; margin: 0; }
.service-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--color-muted);
  font-size: 0.93rem;
  margin-bottom: 0.4rem;
}
.service-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.55em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
}

/* -------------------- Steps -------------------- */
.step-row { position: relative; }

/* Ligne de connexion en desktop */
@media (min-width: 992px) {
  .step-row::before {
    content: '';
    position: absolute;
    top: 76px; /* gutter (12px) + padding-top carte (28px) + rayon cercle (36px) */
    left: calc(12.5% + 36px);
    right: calc(12.5% + 36px);
    height: 1px;
    border-top: 2px dashed var(--color-line);
    z-index: 0;
    pointer-events: none;
  }
}

.step-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  height: 100%;
  border: 1px solid var(--color-line);
  text-align: center;
  position: relative;
  overflow: visible;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.step-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(31, 58, 95, 0.25);
}

.step-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.25rem;
  position: relative;
  z-index: 1;
}

.step-icon-circle {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.75rem;
  box-shadow: 0 6px 20px rgba(31, 58, 95, 0.25);
  margin-bottom: 0.65rem;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow var(--transition);
}
.step-card:hover .step-icon-circle {
  transform: scale(1.12) translateY(-4px);
  box-shadow: 0 14px 30px rgba(31, 58, 95, 0.35);
}

.step-num {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  opacity: 0.6;
}

.step-card h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.step-card p { color: var(--color-muted); margin: 0; font-size: 0.92rem; }

/* -------------------- Sectors / Quote -------------------- */
.sector-pill {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  font-weight: 500;
  color: var(--color-text);
  text-align: center;
  transition: all var(--transition);
}
.sector-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.sector-pill i { color: var(--color-primary); margin-right: 0.4rem; }

.quote-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  position: relative;
  box-shadow: var(--shadow-lg);
}
.quote-mark {
  font-size: 3rem;
  opacity: 0.4;
  position: absolute;
  top: 1rem; right: 1.5rem;
}
.quote-card blockquote {
  font-size: 1.15rem;
  line-height: 1.55;
  font-style: italic;
  font-weight: 500;
}
.quote-card figcaption { color: rgba(255, 255, 255, 0.9); font-size: 0.95rem; }
.quote-card figcaption .text-muted { color: rgba(255, 255, 255, 0.7) !important; }

/* -------------------- Contact -------------------- */
.contact-list li {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  color: rgba(255, 255, 255, 0.85);
}
.contact-list i {
  flex-shrink: 0;
  width: 40px; height: 40px;
  background: rgba(255, 255, 255, 0.10);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.contact-list strong { color: #fff; }
.contact-list a { color: rgba(255, 255, 255, 0.9); }
.contact-list a:hover { color: #fff; }

.contact-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-lg);
}
.contact-card .form-label { color: var(--color-ink); font-weight: 500; font-size: 0.92rem; }
.contact-card .form-control,
.contact-card .form-select {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.95rem;
  font-size: 0.97rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.contact-card .form-control:focus,
.contact-card .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(11, 61, 145, 0.15);
}
.contact-card .form-check-label { color: var(--color-text); font-size: 0.92rem; }

.form-feedback { font-size: 0.95rem; }
.form-feedback.is-success {
  color: #166534;
  background: #dcfce7;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}
.form-feedback.is-error {
  color: #991b1b;
  background: #fee2e2;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
}

/* -------------------- Footer -------------------- */
.footer {
  background: #0a1428;
  color: rgba(255, 255, 255, 0.8);
  padding: 4rem 0 2rem;
}
.footer .brand-text { color: #fff; }
.footer-title {
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.footer-list { list-style: none; padding: 0; margin: 0; }
.footer-list li { margin-bottom: 0.6rem; }
.footer-list a { color: rgba(255, 255, 255, 0.8); }
.footer-list a:hover { color: #fff; }
.footer-sep { border-color: rgba(255, 255, 255, 0.1); margin: 2.5rem 0 1.5rem; }
.footer .small a { color: rgba(255, 255, 255, 0.75); }
.footer .small a:hover { color: #fff; }

/* -------------------- Back to top -------------------- */
.back-to-top {
  position: fixed;
  bottom: 1.5rem; right: 1.5rem;
  width: 48px; height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 1030;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-3px); }

/* -------------------- Reveal animation -------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* -------------------- Responsive tweaks -------------------- */
@media (max-width: 991.98px) {
  .hero { padding: 7rem 0 3rem; }
  .min-vh-90 { min-height: auto; }
  .section { padding: 4.5rem 0; }
  .navbar { background: rgba(255, 255, 255, 0.97); box-shadow: var(--shadow-sm); }
  .navbar-collapse { background: #fff; margin-top: 0.75rem; padding: 1rem; border-radius: var(--radius-md); }
}
@media (max-width: 575.98px) {
  .hero h1 { font-size: 2rem; }
  .contact-card { padding: 1.5rem; }
  .quote-card { padding: 1.75rem 1.5rem; }
}

/* Respecter prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   ACCESSIBILITÉ — skip link (apparait au focus clavier)
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  background: var(--color-primary);
  color: #fff;
  padding: 0.7rem 1.25rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 1300;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: top 0.25s ease;
}
.skip-link:focus, .skip-link:focus-visible {
  top: 0;
  color: #fff;
  outline: 3px solid #fff;
  outline-offset: 2px;
}

/* ==========================================================================
   FAQ — accordéon Bootstrap stylisé
   ========================================================================== */
.faq-accordion .accordion-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md) !important;
  margin-bottom: 0.85rem;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.faq-accordion .accordion-item:hover { border-color: rgba(31, 58, 95, 0.3); }
.faq-accordion .accordion-button {
  background: #fff;
  color: var(--color-ink);
  font-weight: 600;
  font-size: 1.02rem;
  padding: 1.15rem 1.4rem;
  border-radius: var(--radius-md) !important;
  transition: all var(--transition);
}
.faq-accordion .accordion-button:not(.collapsed) {
  background: var(--color-surface-alt);
  color: var(--color-primary);
  box-shadow: none;
}
.faq-accordion .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(31, 58, 95, 0.18);
  border-color: transparent;
}
.faq-accordion .accordion-button::after {
  background-size: 1rem;
  transition: transform var(--transition);
}
.faq-accordion .accordion-body {
  color: var(--color-text);
  padding: 0.25rem 1.4rem 1.4rem;
  line-height: 1.75;
  font-size: 0.97rem;
}
.faq-accordion .accordion-body strong { color: var(--color-ink); }

/* FAQ dark mode */
[data-theme="dark"] .faq-accordion .accordion-item {
  background: #21253A;
  border-color: #2A3149;
}
[data-theme="dark"] .faq-accordion .accordion-item:hover { border-color: rgba(122, 160, 204, 0.45); }
[data-theme="dark"] .faq-accordion .accordion-button {
  background: #21253A;
  color: var(--color-ink);
}
[data-theme="dark"] .faq-accordion .accordion-button:not(.collapsed) {
  background: #272C44;
  color: #8AB4D8;
}
[data-theme="dark"] .faq-accordion .accordion-button::after { filter: invert(0.8) brightness(1.4); }
[data-theme="dark"] .faq-accordion .accordion-button:focus { box-shadow: 0 0 0 3px rgba(122, 160, 204, 0.2); }
[data-theme="dark"] .faq-accordion .accordion-body { color: var(--color-text); }
[data-theme="dark"] .faq-accordion .accordion-body strong { color: var(--color-ink); }

/* ==========================================================================
   TRANSITIONS ENRICHIES
   ========================================================================== */

/* Barre de progression du scroll */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light), var(--color-accent));
  z-index: 1200;
  transition: width 0.08s linear;
  pointer-events: none;
}

/* Bouton toggle thème */
.btn-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1.5px solid var(--color-line);
  background: transparent;
  color: var(--color-muted);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-theme-toggle:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: rotate(22deg);
}

/* Navbar — underline animée sur hover */
.navbar .nav-link {
  position: relative;
}
.navbar .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0.2rem;
  left: 50%; right: 50%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: left 0.25s ease, right 0.25s ease;
}
.navbar .nav-link:hover::after,
.navbar .nav-link.active::after {
  left: 0.9rem;
  right: 0.9rem;
}

/* Animation d'entrée du hero au chargement */
@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-content > * {
  animation: heroFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.hero-content > *:nth-child(1) { animation-delay: 0.05s; }
.hero-content > *:nth-child(2) { animation-delay: 0.18s; }
.hero-content > *:nth-child(3) { animation-delay: 0.32s; }
.hero-content > *:nth-child(4) { animation-delay: 0.46s; }
.hero-content > *:nth-child(5) { animation-delay: 0.60s; }

/* Stagger des éléments dans une grille reveal */
.row > .reveal:nth-child(2) { transition-delay: 0.08s; }
.row > .reveal:nth-child(3) { transition-delay: 0.16s; }
.row > .reveal:nth-child(4) { transition-delay: 0.05s; }
.row > .reveal:nth-child(5) { transition-delay: 0.13s; }
.row > .reveal:nth-child(6) { transition-delay: 0.21s; }
.row > .reveal:nth-child(7) { transition-delay: 0.08s; }
.row > .reveal:nth-child(8) { transition-delay: 0.16s; }
.row > .reveal:nth-child(9) { transition-delay: 0.24s; }

/* Service icon : scale + rotation au hover de la carte */
.service-icon {
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow var(--transition);
}
.service-card:hover .service-icon {
  transform: scale(1.15) rotate(-8deg);
  box-shadow: 0 10px 24px rgba(11, 61, 145, 0.35);
}

/* Step cards : animation icône au hover (définie dans la section Steps) */

/* Sector pills : scale discret */
.sector-pill { transition: all var(--transition), transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); }
.sector-pill:hover { transform: translateY(-3px) scale(1.03); }

/* Bouton : rebond au clic */
.btn:active { transform: scale(0.96) translateY(1px); }
.btn-primary:active { box-shadow: 0 2px 8px rgba(11, 61, 145, 0.2); }

/* Cards KPI héro : vitesse d'animation différenciée */
.hero-card { transition: transform 0.4s ease, box-shadow 0.4s ease; }
.hero-card:hover { transform: translateY(-10px) !important; box-shadow: var(--shadow-lg); }

/* Quote card shimmer */
.quote-card::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.08) 50%, transparent 60%);
  animation: shimmer 4s infinite 2s;
}
@keyframes shimmer {
  0%   { left: -100%; }
  60%  { left: 150%; }
  100% { left: 150%; }
}

/* ==========================================================================
   PAGES LÉGALES
   ========================================================================== */
.page-hero {
  padding: 8rem 0 3.5rem;
  background: linear-gradient(180deg, #EEF4FF 0%, #FFFFFF 100%);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 60%, rgba(61, 108, 168, 0.1) 0%, transparent 55%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(1.8rem, 3vw, 2.4rem); }
.page-hero .breadcrumb { font-size: 0.88rem; margin-bottom: 1.25rem; }
.page-hero .breadcrumb-item + .breadcrumb-item::before { color: var(--color-muted); }
.page-hero .breadcrumb-item.active { color: var(--color-muted); }
.page-hero .breadcrumb-item a { color: var(--color-primary); }
.page-hero-meta { color: var(--color-muted); font-size: 0.88rem; margin-top: 0.75rem; }

.legal-content h2 {
  font-size: 1.35rem;
  color: var(--color-ink);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-line);
}
.legal-content h3 { font-size: 1.05rem; color: var(--color-ink); margin-top: 1.5rem; margin-bottom: 0.4rem; }
.legal-content p, .legal-content li { color: var(--color-text); line-height: 1.85; margin-bottom: 0.65rem; }
.legal-content ul { padding-left: 1.5rem; }
.legal-content a:not(.btn) { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.legal-highlight {
  background: var(--color-surface-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
.legal-highlight p { margin: 0; }
.legal-placeholder {
  display: inline-block;
  background: rgba(245, 158, 11, 0.15);
  border: 1px dashed rgba(180, 120, 0, 0.4);
  border-radius: 4px;
  padding: 0.1em 0.5em;
  color: #92400e;
  font-weight: 600;
  font-size: 0.88em;
}
.legal-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.legal-table th { background: var(--color-surface-alt); color: var(--color-ink); font-weight: 600; text-align: left; padding: 0.75rem 1rem; border: 1px solid var(--color-line); }
.legal-table td { padding: 0.65rem 1rem; border: 1px solid var(--color-line); color: var(--color-text); vertical-align: top; }
.legal-rights-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.legal-right-card { background: var(--color-surface-alt); border-radius: var(--radius-sm); padding: 1rem 1.25rem; border: 1px solid var(--color-line); }
.legal-right-card i { color: var(--color-primary); font-size: 1.3rem; margin-bottom: 0.5rem; display: block; }
.legal-right-card strong { display: block; font-size: 0.95rem; margin-bottom: 0.25rem; color: var(--color-ink); }
.legal-right-card span { font-size: 0.88rem; color: var(--color-muted); }

/* ==========================================================================
   THÈME SOMBRE — dark slate avec tons bleu-gris chauds
   Activé via <html data-theme="dark">
   Stocké dans localStorage clé "sis-theme"
   ========================================================================== */
[data-theme="dark"] {
  --color-surface:      #1C202E;   /* fond principal — gris ardoise chaud */
  --color-surface-alt:  #171A27;   /* sections alternées, légèrement plus sombre */
  --color-surface-dark: #0F1119;   /* section contact, footer */
  --color-ink:          #E6EDF8;   /* titres */
  --color-text:         #B2BDD0;   /* corps de texte */
  --color-muted:        #6A788E;   /* texte secondaire */
  --color-line:         #2A3149;   /* séparateurs */
}

/* ---- Base ---- */
[data-theme="dark"] body { background: var(--color-surface); color: var(--color-text); }
[data-theme="dark"] h1,[data-theme="dark"] h2,[data-theme="dark"] h3,
[data-theme="dark"] h4,[data-theme="dark"] h5,[data-theme="dark"] h6 { color: var(--color-ink); }
[data-theme="dark"] .text-muted { color: var(--color-muted) !important; }
[data-theme="dark"] .section-sub { color: var(--color-muted); }

/* ---- Navbar ---- */
[data-theme="dark"] .navbar { background: transparent; }
[data-theme="dark"] .navbar.scrolled {
  background: rgba(23, 26, 39, 0.94);
  backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06), 0 4px 20px rgba(0,0,0,0.3);
}
[data-theme="dark"] .navbar .nav-link { color: #A8B4C8; }
[data-theme="dark"] .navbar .nav-link:hover,
[data-theme="dark"] .navbar .nav-link.active { color: #C8D8F0; }
[data-theme="dark"] .navbar .nav-link::after { background: #7AA0CC; }
[data-theme="dark"] .btn-theme-toggle { border-color: #2A3149; color: #6A788E; }
[data-theme="dark"] .btn-theme-toggle:hover { background: #232840; border-color: #7AA0CC; color: #C8D8F0; }
[data-theme="dark"] .navbar-toggler { border-color: #2A3149; }
[data-theme="dark"] .navbar-toggler-icon { filter: invert(0.7); }
[data-theme="dark"] .navbar-collapse { background: #171A27; border: 1px solid #2A3149; }
[data-theme="dark"] .brand-fallback { color: var(--color-ink); }

/* ---- Hero ---- */
[data-theme="dark"] .hero {
  background: linear-gradient(160deg, #141828 0%, #1C202E 60%, #1C202E 100%);
}
[data-theme="dark"] .hero-bg {
  background:
    radial-gradient(ellipse at 12% 20%, rgba(58, 92, 148, 0.22) 0%, transparent 50%),
    radial-gradient(ellipse at 88% 80%, rgba(36, 58, 100, 0.18) 0%, transparent 50%);
}
[data-theme="dark"] .hero::after { opacity: 0.18; }
[data-theme="dark"] .hero .lead { color: var(--color-muted) !important; }
[data-theme="dark"] .hero-bullets li { color: var(--color-text); }
[data-theme="dark"] .hero-bullets i { color: #7AA0CC; }

/* KPI cards hero — fond "verre" sur ardoise */
[data-theme="dark"] .hero-card {
  background: rgba(34, 40, 62, 0.85);
  border-color: #2A3149;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.05);
}
[data-theme="dark"] .kpi-value { color: var(--color-ink); }
[data-theme="dark"] .kpi-label { color: var(--color-muted); }
[data-theme="dark"] .kpi-icon { background: rgba(90, 139, 196, 0.15); color: #7AA0CC; }
[data-theme="dark"] .kpi-icon-alt  { background: rgba(90, 139, 196, 0.12); color: #8AB4DC; }
[data-theme="dark"] .kpi-icon-alt2 { background: rgba(52, 168, 100, 0.12); color: #52A864; }

/* ---- Value strip ---- */
[data-theme="dark"] .value-strip {
  background: var(--color-surface-alt);
  border-color: #222640;
}
[data-theme="dark"] .value-num { color: var(--color-primary-light); }
[data-theme="dark"] .value-lbl { color: var(--color-muted); }

/* ---- Sections ---- */
[data-theme="dark"] .section-alt { background: var(--color-surface-alt); }

/* ---- Service cards ---- */
[data-theme="dark"] .service-card {
  background: #21253A;
  border-color: #2A3149;
}
[data-theme="dark"] .service-card:hover {
  border-color: rgba(122, 160, 204, 0.55);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
  background: #242840;
}
[data-theme="dark"] .service-card p { color: var(--color-text); }
[data-theme="dark"] .service-list li { color: var(--color-muted); }
[data-theme="dark"] .service-list li::before { background: #7AA0CC; }
[data-theme="dark"] .service-card:hover .service-icon { box-shadow: 0 10px 24px rgba(58, 92, 148, 0.4); }
[data-theme="dark"] .service-card-featured {
  background: linear-gradient(150deg, #1E2440 0%, #1E2A52 100%);
  border-color: #4A72A8 !important;
  box-shadow: 0 8px 28px rgba(30, 42, 82, 0.5);
}
[data-theme="dark"] .service-card-featured:hover { box-shadow: 0 16px 48px rgba(30, 42, 82, 0.65); }
[data-theme="dark"] .services-row-label { border-color: #2A3149; }

/* ---- Step cards ---- */
[data-theme="dark"] .step-card {
  background: #21253A;
  border-color: #2A3149;
}
[data-theme="dark"] .step-card p { color: var(--color-muted); }
[data-theme="dark"] .step-row::before { border-color: #2A3149; }
[data-theme="dark"] .step-num { color: var(--color-accent); }

/* ---- Sector pills ---- */
[data-theme="dark"] .sector-pill {
  background: #21253A;
  border-color: #2A3149;
  color: var(--color-text);
}
[data-theme="dark"] .sector-pill:hover {
  background: #272C44;
  border-color: #7AA0CC;
  color: #C8D8F0;
}
[data-theme="dark"] .sector-pill i { color: #7AA0CC; }

/* ---- Citation ---- */
[data-theme="dark"] .quote-card {
  background: linear-gradient(135deg, #1F3A5F 0%, #2A4A7A 100%);
}

/* ---- Section contact ---- */
[data-theme="dark"] .section-dark {
  background: linear-gradient(135deg, #0D1020 0%, #141828 100%);
}
[data-theme="dark"] .contact-card {
  background: #21253A;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
  border: 1px solid #2A3149;
}
[data-theme="dark"] .contact-card .form-label { color: var(--color-ink); }
[data-theme="dark"] .contact-card .form-control,
[data-theme="dark"] .contact-card .form-select {
  background: #191D2E;
  border-color: #2A3149;
  color: var(--color-ink);
}
[data-theme="dark"] .contact-card .form-control:focus,
[data-theme="dark"] .contact-card .form-select:focus {
  background: #1D2235;
  border-color: #5A8BC4;
  box-shadow: 0 0 0 3px rgba(90, 139, 196, 0.2);
  color: var(--color-ink);
}
[data-theme="dark"] .contact-card .form-control::placeholder { color: var(--color-muted); }
[data-theme="dark"] .contact-card .form-select option { background: #191D2E; color: var(--color-ink); }
[data-theme="dark"] .contact-card .form-check-label { color: var(--color-muted); }
[data-theme="dark"] .contact-list i { background: rgba(255,255,255,0.08); }

/* ---- Footer ---- */
[data-theme="dark"] .footer { background: #0C0F1A; }

/* ---- Divers ---- */
[data-theme="dark"] .back-to-top { background: #3D6CA8; }
[data-theme="dark"] .back-to-top:hover { background: #2F5585; }
[data-theme="dark"] .scroll-progress {
  background: linear-gradient(90deg, #3D6CA8, #7AA0CC);
}
[data-theme="dark"] .eyebrow { background: rgba(122, 160, 204, 0.14); color: #8AB4D8; }
[data-theme="dark"] .eyebrow-light { background: rgba(255,255,255,0.1); color: #fff; }
[data-theme="dark"] .btn-outline-secondary {
  color: var(--color-text);
  border-color: #2A3149;
  background: transparent;
}
[data-theme="dark"] .btn-outline-secondary:hover {
  background: #232840;
  border-color: #7AA0CC;
  color: #C8D8F0;
}

/* ---- Pages légales ---- */
[data-theme="dark"] .page-hero {
  background: linear-gradient(160deg, #141828 0%, #1C202E 100%);
}
[data-theme="dark"] .page-hero .breadcrumb-item a { color: #7AA0CC; }
[data-theme="dark"] .page-hero-meta { color: var(--color-muted); }
[data-theme="dark"] .legal-content h2 { border-color: #2A3149; }
[data-theme="dark"] .legal-highlight { background: #21253A; border-left-color: #4A72A8; }
[data-theme="dark"] .legal-table th { background: #21253A; border-color: #2A3149; }
[data-theme="dark"] .legal-table td { border-color: #2A3149; }
[data-theme="dark"] .legal-right-card { background: #21253A; border-color: #2A3149; }

/* ---- Mobile ---- */
@media (max-width: 991.98px) {
  [data-theme="dark"] .navbar {
    background: rgba(23, 26, 39, 0.97);
    box-shadow: 0 1px 0 rgba(255,255,255,0.05), 0 4px 16px rgba(0,0,0,0.35);
  }
}