/* ===== Design tokens ===== */
:root {
  --bg-primary: #FFFFFF;
  --bg-alt: #F5F7FA;
  --text-primary: #0A1F3D;
  --text-secondary: #4A5975;
  --text-muted: #8A94A6;
  --accent-primary: #1E3A8A;
  --accent-bright: #2563EB;
  --accent-subtle: #EEF2FF;
  --border: #E2E8F0;
  --success: #10B981;

  --font-display: 'Manrope', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --container-w: 1180px;
}

/* ===== Reset ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
input, textarea { font: inherit; }
h1, h2, h3, h4, h5 { font-family: var(--font-display); color: var(--text-primary); line-height: 1.2; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent-primary); color: #fff; padding: 0.75rem 1.25rem; z-index: 200;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Reveal-on-scroll ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px) scale(0.98);
  filter: blur(6px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease), filter 0.8s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }

/* Stagger : les enfants d'une même grille se révèlent en cascade */
.service-cards .reveal:nth-child(1), .methode-steps .reveal:nth-child(1) { transition-delay: 0s; }
.service-cards .reveal:nth-child(2), .methode-steps .reveal:nth-child(2) { transition-delay: 0.08s; }
.service-cards .reveal:nth-child(3), .methode-steps .reveal:nth-child(3) { transition-delay: 0.16s; }
.service-cards .reveal:nth-child(4), .methode-steps .reveal:nth-child(4) { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  border-radius: 10px;
  padding: 0.7rem 1.4rem;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(10, 31, 61, 0.1);
}
.btn-primary:hover { background: var(--accent-bright); box-shadow: 0 8px 24px rgba(37, 99, 235, 0.28); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent-bright); color: var(--accent-bright); transform: translateY(-2px); }
.btn-outline {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  position: relative;
}
.btn-lg { padding: 0.9rem 1.8rem; font-size: 1.02rem; }
.btn-sm { padding: 0.55rem 1.1rem; font-size: 0.9rem; }

.btn-arrow { border-radius: 999px; }
.btn-arrow-icon {
  display: inline-flex;
  align-items: center;
  transition: transform 0.3s var(--ease);
}
.btn-arrow-icon svg { width: 15px; height: 15px; display: block; }
.btn-arrow:hover .btn-arrow-icon { transform: translateX(4px); }
.btn-disabled { opacity: 0.6; cursor: not-allowed; }
.btn-disabled:hover { transform: none; }

.badge-soon {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  margin-left: auto;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-bright);
  margin-bottom: 0.75rem;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 20px rgba(10, 31, 61, 0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}
.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
}
.logo-accent { color: var(--accent-bright); }

.main-nav { display: flex; gap: 2rem; }
.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  transition: color 0.25s var(--ease);
}
.main-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: var(--accent-bright);
  transition: width 0.25s var(--ease);
}
.main-nav a:hover { color: var(--text-primary); }
.main-nav a:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 1.1rem; }

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
}
.lang-option { padding: 0.1rem 0.3rem; transition: color 0.2s; }
.lang-option.is-active { color: var(--accent-primary); font-weight: 700; }
.lang-sep { opacity: 0.5; }

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}
.nav-burger span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav-burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.is-open span:nth-child(2) { opacity: 0; }
.nav-burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { padding: 6rem 0 5rem; overflow: hidden; }
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 3rem;
}
.hero-title {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
}
.hero-title .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(18px);
  filter: blur(4px);
  animation: word-in 0.6s var(--ease) forwards;
}
@keyframes word-in {
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 46ch;
  margin-bottom: 2rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-visual { display: flex; justify-content: center; will-change: transform; }
.hero-svg { width: 100%; max-width: 400px; }
.hero-nodes circle { animation: pulse 3s ease-in-out infinite; }
.hero-nodes circle:nth-child(2) { animation-delay: 0.3s; }
.hero-nodes circle:nth-child(3) { animation-delay: 0.6s; }
.hero-nodes circle:nth-child(4) { animation-delay: 0.9s; }
.hero-nodes circle:nth-child(5) { animation-delay: 1.2s; }
.hero-nodes circle:nth-child(6) { animation-delay: 1.5s; }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ===== Trust bar ===== */
.trust-bar { padding: 2.5rem 0 1.5rem; text-align: center; }
.trust-text { color: var(--text-muted); font-size: 0.95rem; }
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.1rem 0;
  margin-top: 1.5rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex;
  gap: 2rem;
  width: max-content;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  animation: marquee 22s linear infinite;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== Section head ===== */
.section-head { max-width: 640px; margin-bottom: 3rem; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin-bottom: 0.75rem; }
.section-lead { color: var(--text-secondary); font-size: 1.05rem; }

/* ===== Services ===== */
.services { padding: 6rem 0; background: var(--bg-alt); }
.service-block { margin-bottom: 3rem; }
.service-block:last-child { margin-bottom: 0; }
.service-block-title {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
}
.service-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
.service-cards-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(30, 58, 138, 0.1);
  border-color: var(--accent-subtle);
}
.card-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  margin-bottom: 1.1rem;
}
.card-icon svg { width: 22px; height: 22px; }
.service-card h4 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.service-card p { color: var(--text-secondary); font-size: 0.92rem; }

/* ===== Méthode ===== */
.methode { padding: 6rem 0; }
.methode-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.methode-step {
  padding: 1.75rem;
  border-left: 2px solid var(--border);
  transition: border-color 0.3s var(--ease);
}
.methode-step:hover { border-color: var(--accent-bright); }
.methode-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-bright);
  display: block;
  margin-bottom: 0.6rem;
}
.methode-step h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.methode-step p { color: var(--text-secondary); font-size: 0.92rem; }

/* ===== À propos ===== */
.apropos { padding: 6rem 0; background: var(--bg-alt); }
.apropos-inner { max-width: 720px; }
.apropos h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); margin-bottom: 1.25rem; }
.apropos p { color: var(--text-secondary); margin-bottom: 1.1rem; }
.apropos-quote {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  border-left: 3px solid var(--accent-bright);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
}
.apropos-values {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.apropos-values li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
}
.apropos-location { color: var(--text-muted); font-size: 0.92rem; }

/* ===== FAQ ===== */
.faq { padding: 6rem 0; }
.faq-list { max-width: 780px; }
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 0;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text-primary);
}
.faq-chevron {
  flex-shrink: 0;
  width: 20px; height: 20px;
  position: relative;
  margin-left: 1rem;
}
.faq-chevron::before, .faq-chevron::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  background: var(--text-secondary);
  transition: transform 0.3s var(--ease);
}
.faq-chevron::before { width: 12px; height: 2px; transform: translate(-50%, -50%); }
.faq-chevron::after { width: 2px; height: 12px; transform: translate(-50%, -50%); }
.faq-item.is-open .faq-chevron::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}
.faq-answer p { color: var(--text-secondary); padding-bottom: 1.4rem; max-width: 65ch; }

/* ===== CTA final / Contact ===== */
.cta-final { padding: 6rem 0 5rem; background: var(--bg-alt); }
.cta-inner .section-head { margin: 0 auto 3rem; text-align: center; max-width: 560px; }
.cta-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.form-row { display: flex; flex-direction: column; gap: 0.4rem; }
.form-row label { font-size: 0.88rem; font-weight: 600; color: var(--text-secondary); }
.form-row input, .form-row textarea {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--accent-bright);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}
.form-note { font-size: 0.82rem; color: var(--text-muted); }

.cta-alt-channels {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.cta-alt-channels .btn-outline {
  justify-content: flex-start;
  width: 100%;
}

/* ===== Footer ===== */
.site-footer { background: var(--text-primary); color: rgba(255,255,255,0.75); padding: 4rem 0 0; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
}
.footer-col { display: flex; flex-direction: column; gap: 0.7rem; }
.footer-col h5 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.3rem; }
.footer-col a, .footer-soon { font-size: 0.92rem; color: rgba(255,255,255,0.7); transition: color 0.25s var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-soon { opacity: 0.55; }
.footer-brand .logo { color: #fff; }
.footer-brand p { font-size: 0.9rem; max-width: 32ch; opacity: 0.75; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.6;
}

/* ===== Responsive ===== */
@media (max-width: 1080px) {
  .main-nav { gap: 1.25rem; }
  .header-actions { gap: 0.75rem; }
  .btn-sm { padding: 0.55rem 0.9rem; font-size: 0.82rem; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 260px; margin: 0 auto; }
  .service-cards, .service-cards-3 { grid-template-columns: repeat(2, 1fr); }
  .methode-steps { grid-template-columns: repeat(2, 1fr); }
  .cta-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s var(--ease);
  }
  .main-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .header-actions .btn-sm { display: none; }
  .nav-burger { display: flex; }
  .service-cards, .service-cards-3 { grid-template-columns: 1fr; }
  .methode-steps { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}