*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: hidden; }

:root {
  --bg:             #080808;
  --surface:        #0F0F0F;
  --surface2:       #171717;
  --border:         rgba(255,255,255,0.07);
  --border-mid:     rgba(255,255,255,0.13);
  --border-strong:  rgba(255,255,255,0.22);
  --text:           #F0F0F0;
  --muted:          #686868;
  --muted2:         #686868;
  --accent:         #C8F135;
  --font:           'avenir-next', -apple-system, 'Helvetica Neue', sans-serif;
  --nav-h:          240px;
}

.dot-accent { color: var(--accent); }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── LOGO MARK ── */
.logo-mark {
  display: inline-block;
  text-decoration: none;
  transition: opacity 0.2s;
  flex-shrink: 0;
}
.logo-mark:hover { opacity: 0.6; }
.logo-mark img {
  display: block;
  height: 200px;
  width: auto;
}
.logo-mark--sm img { height: 80px; }

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 3rem;
  border-bottom: 0.5px solid var(--border);
  background: rgba(8,8,8,0.70);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 1.25rem; }

.lang-toggle {
  display: flex;
  border: 0.5px solid var(--border-mid);
}
.lang-btn {
  padding: 0.35rem 0.7rem;
  font-family: var(--font);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  text-transform: uppercase;
}
.lang-btn.active { background: var(--text); color: var(--bg); }

.nav-cta {
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 0.5rem 1.3rem;
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s;
  text-decoration: none;
  display: inline-block;
}
.nav-cta:hover { opacity: 0.82; }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: var(--nav-h) 3rem 5rem;
  position: relative;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.022) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 0%, black 25%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 0%, black 25%, transparent 100%);
  pointer-events: none;
}
.hero-tag {
  margin-top: auto;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
  display: flex; align-items: center; gap: 1rem;
  position: relative;
}
.hero-tag::before {
  content: '';
  display: inline-block;
  width: 28px; height: 0.5px;
  background: var(--muted);
  flex-shrink: 0;
}
.hero-title {
  font-weight: 900;
  font-size: clamp(3rem, 7.5vw, 6.25rem);
  line-height: 0.93;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  max-width: 980px;
  position: relative;
}
.hero-sub {
  font-size: 1rem;
  color: var(--muted);
  max-width: 490px;
  line-height: 1.8;
  margin-bottom: 3rem;
  font-weight: 400;
  position: relative;
}
.hero-actions {
  display: flex; align-items: center; gap: 1.75rem;
  position: relative;
}
.btn-primary {
  background: var(--text);
  color: var(--bg);
  padding: 0.9rem 2.25rem;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none; cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.82; }
.btn-ghost {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 0.5px solid var(--border-mid);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text); }

.hero-stats {
  display: flex; gap: 4rem;
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 0.5px solid var(--border);
  position: relative;
}
.stat-num {
  font-weight: 900;
  font-size: 2.1rem;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--accent);
}
.stat-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 0.4rem;
}

/* ── PROOF BAR ── */
.proof {
  border-bottom: 0.5px solid var(--border);
  padding: 1.6rem 3rem;
  display: flex; align-items: center; gap: 2.5rem;
  background: var(--surface);
}
.proof-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted2);
  white-space: nowrap;
  flex-shrink: 0;
}
.proof-divider {
  width: 0.5px; height: 20px;
  background: var(--border-mid);
  flex-shrink: 0;
}
.proof-clients { display: flex; align-items: center; gap: 2.5rem; flex-wrap: wrap; }
.proof-client {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ── SECTIONS ── */
section { padding: 7rem 3rem; }
.section-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.7rem;
  display: flex; align-items: center; gap: 0.5rem;
}
.section-label .num { color: var(--accent); }
.section-title {
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 3.25rem);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 1rem;
}

/* ── SERVICES ── */
.services { background: var(--surface); }
.services-intro {
  max-width: 460px;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.8;
  font-weight: 400;
  margin-bottom: 4rem;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 0.5px solid var(--border-mid);
}
.service-item {
  padding: 2.75rem;
  border-right: 0.5px solid var(--border-mid);
  position: relative;
  transition: background 0.3s;
}
.service-item:last-child { border-right: none; }
.service-item.active { background: var(--surface2); }
.service-bar {
  position: absolute; top: 0; left: 0; right: 0;
  height: 1.5px;
  background: var(--border-mid);
  transition: background 0.25s;
}
.service-item.active .service-bar { background: var(--text); }
.service-num {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 2rem;
  text-transform: uppercase;
}
.service-item h3 {
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.service-item p {
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.75;
  font-weight: 400;
}

/* ── CASE STUDIES ── */
.cases { background: var(--bg); }
.cases-header {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 4rem;
}
.cases-count {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--muted2);
  text-transform: uppercase;
  align-self: flex-end;
}
.case-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-mid);
}
.case-card {
  background: var(--surface);
  padding: 3rem;
}
.case-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 2.5rem;
}
.case-type {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex; align-items: center; gap: 0.6rem;
}
.case-type::before { content: '—'; color: var(--muted2); font-weight: 400; }
.case-geo {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.case-card h3 {
  font-weight: 900;
  font-size: 1.8rem;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  line-height: 1.05;
}
.case-title-link {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}
.case-title-link:hover { color: var(--accent); }
.case-sub {
  font-size: 0.83rem;
  color: var(--muted);
  margin-bottom: 2rem;
  font-weight: 400;
  line-height: 1.7;
}

/* Flow diagram */
.flow {
  border: 0.5px solid var(--border-mid);
  margin-bottom: 2rem;
}
.flow-title {
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  padding: 0.85rem 1.25rem;
  border-bottom: 0.5px solid var(--border);
  background: var(--surface2);
}
.flow-step {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.8rem 1.25rem;
  border-bottom: 0.5px solid var(--border);
}
.flow-step:last-child { border-bottom: none; }
.flow-num {
  font-size: 0.58rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  width: 22px;
  flex-shrink: 0;
}
.flow-text { flex: 1; }
.flow-text strong { font-size: 0.75rem; font-weight: 700; display: block; }
.flow-text span { font-size: 0.68rem; color: var(--muted); font-weight: 400; }
.flow-badge {
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--muted);
  border: 0.5px solid var(--border-mid);
  padding: 0.15rem 0.55rem;
  white-space: nowrap;
  text-transform: uppercase;
  background: var(--surface2);
}

/* KPIs */
.case-kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 0.5px solid var(--border-mid);
  margin-top: 2rem;
}
.kpi { background: var(--surface2); padding: 1rem 0.85rem; }
.kpi-val {
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--accent);
}
.kpi-desc {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.06em;
  margin-top: 0.3rem;
  text-transform: uppercase;
}
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.5rem; }

/* ── CASE SLIDER ── */
.case-slider {
  position: relative;
  margin-top: 2rem;
  border-radius: 8px;
  overflow: hidden;
  border: 0.5px solid var(--border-mid);
  background: #000;
}
.slider-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.slider-track img {
  width: 100%;
  flex-shrink: 0;
  display: block;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #000;
}
.slider-prev,
.slider-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(8,8,8,0.7);
  border: 0.5px solid var(--border-mid);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.2s, border-color 0.2s;
  backdrop-filter: blur(4px);
}
.slider-prev { left: 0.75rem; }
.slider-next { right: 0.75rem; }
.slider-prev:hover,
.slider-next:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--border-strong);
}
.slider-dots {
  position: absolute;
  bottom: 0.75rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.4rem;
}
.dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  transition: background 0.2s;
}
.dot.active { background: var(--text); }
.tag {
  border: 0.5px solid var(--border-mid);
  padding: 0.22rem 0.65rem;
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

/* ── PROCESS ── */
.process { background: var(--surface); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 0.5px solid var(--border-mid);
  margin-top: 4rem;
}
.process-step {
  padding: 2.5rem 2rem;
  border-right: 0.5px solid var(--border-mid);
  position: relative;
}
.process-step:last-child { border-right: none; }
.process-step.active { background: var(--surface2); }
.step-bar {
  position: absolute; top: 0; left: 0; right: 0;
  height: 1.5px; background: var(--border-mid);
  transition: background 0.25s;
}
.process-step.active .step-bar { background: var(--text); }
.step-num {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.process-step h4 {
  font-weight: 900;
  font-size: 0.9rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}
.process-step p {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.7;
  font-weight: 400;
}

/* ── TESTIMONIALS ── */
.testimonials { background: var(--bg); }
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-mid);
  margin-top: 4rem;
}
.testimonial { background: var(--surface); padding: 3rem; }
.quote-mark {
  font-size: 3rem;
  font-weight: 900;
  color: var(--muted2);
  line-height: 0.8;
  margin-bottom: 1.5rem;
  font-family: Georgia, serif;
}
.testimonial blockquote {
  font-size: 0.97rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 2.5rem;
  font-style: italic;
}
.testimonial-author { display: flex; align-items: center; justify-content: space-between; }
.author-info strong { display: block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em; }
.author-info span { font-size: 0.68rem; color: var(--muted); font-weight: 400; letter-spacing: 0.04em; }
.author-tag {
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  border: 0.5px solid var(--border-mid);
  padding: 0.25rem 0.65rem;
}

/* ── CTA ── */
.cta-section {
  background: var(--text);
  padding: 8rem 3rem;
  text-align: center;
}
.cta-section h2 {
  font-weight: 900;
  font-size: clamp(2.5rem, 5.5vw, 4.75rem);
  letter-spacing: -0.04em;
  line-height: 0.93;
  color: var(--bg);
  margin-bottom: 1.75rem;
}
.cta-section .dot-accent { color: var(--bg); }
.cta-section p {
  font-size: 0.92rem;
  color: rgba(8,8,8,0.5);
  max-width: 400px;
  margin: 0 auto 3rem;
  font-weight: 400;
  line-height: 1.75;
}
.btn-dark {
  background: var(--bg);
  color: var(--text);
  padding: 1rem 2.5rem;
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: none; cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: opacity 0.2s;
}
.btn-dark:hover { opacity: 0.78; }

/* ── FOOTER ── */
footer {
  border-top: 0.5px solid var(--border);
  padding: 2rem 3rem;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface);
}
.footer-left { display: flex; align-items: center; gap: 2rem; }
footer p {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
footer a { color: var(--muted); text-decoration: none; transition: color 0.2s; }
footer a:hover { color: var(--text); }
.footer-links { display: flex; gap: 1.5rem; }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-tag     { animation: fadeUp 0.7s 0.10s ease both; }
.hero-title   { animation: fadeUp 0.7s 0.20s ease both; }
.hero-sub     { animation: fadeUp 0.7s 0.30s ease both; }
.hero-actions { animation: fadeUp 0.7s 0.40s ease both; }
.hero-stats   { animation: fadeUp 0.7s 0.50s ease both; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .logo-mark img { height: 120px; }
  .logo-mark--sm img { height: 60px; }
  :root { --nav-h: 160px; }
  .hero { padding: var(--nav-h) 1.5rem 4rem; }
  section { padding: 5rem 1.5rem; }
  .proof { padding: 1.25rem 1.5rem; gap: 1.25rem; }
  .services-grid { grid-template-columns: 1fr; }
  .service-item { border-right: none; border-bottom: 0.5px solid var(--border-mid); }
  .service-item:last-child { border-bottom: none; }
  .case-cards { grid-template-columns: 1fr; gap: 0; background: none; }
  .case-card { overflow: hidden; border-bottom: 0.5px solid var(--border-mid); }
  .case-card:last-child { border-bottom: none; }
  .case-kpis { grid-template-columns: repeat(2, 1fr); }
  .cases-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .flow-badge { display: none; }
  .flow-title { letter-spacing: 0.08em; white-space: normal; word-break: break-word; }
  .case-header { flex-wrap: wrap; gap: 0.5rem; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-step:nth-child(2) { border-right: none; }
  .process-step:nth-child(3) { border-right: 0.5px solid var(--border-mid); border-top: 0.5px solid var(--border-mid); }
  .process-step:nth-child(4) { border-right: none; border-top: 0.5px solid var(--border-mid); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 2rem; flex-wrap: wrap; }
  footer { flex-direction: column; gap: 1.25rem; text-align: center; }
  .footer-left { flex-direction: column; gap: 0.75rem; }
  .cta-section { padding: 5rem 1.5rem; }
}

@media (max-width: 580px) {
  .logo-mark img { height: 80px; }
  :root { --nav-h: 110px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-step { border-right: none; border-bottom: 0.5px solid var(--border-mid); border-top: none !important; }
  .process-step:last-child { border-bottom: none; }
  .hero-stats { gap: 1.5rem; }

  /* Trusted by — une seule colonne */
  .proof { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .proof-divider { display: none; }
  .proof-clients { gap: 1.25rem; }

  /* Tailles de police lisibles */
  body { font-size: 1rem; }
  .hero-sub { font-size: 1rem; line-height: 1.7; }
  .services-intro { font-size: 1rem; line-height: 1.7; }
  .case-sub { font-size: 1rem; line-height: 1.7; }
  .flow-text strong { font-size: 0.9rem; }
  .flow-text span { font-size: 0.85rem; }
  .process-step p { font-size: 0.95rem; }
  .service-item p { font-size: 0.95rem; line-height: 1.7; }

  /* Cartes projets */
  .case-card { padding: 2rem 1.25rem; }
  .section-title { word-break: break-word; }

  /* Hero title — 3 lignes sur mobile */
  .hero-title { font-size: clamp(1.9rem, 9.5vw, 2.8rem); }
}