/* ==========================================================================
   BTEK.EXHAUSTS — Stylesheet unique
   Palette : blanc dominant, noir texte, rouge #E30613 en accent (~10% surface)
   ========================================================================== */

/* ---------- Variables (thème sombre, inspiration shiftech) ---------- */
:root {
  --red: #E30613;
  --red-hover: #FF1E2D;
  --red-dark: #B80410;

  /* Surfaces sombres, du plus foncé au plus clair */
  --bg-0: #000000;        /* pure black, fonds absolus */
  --bg-1: #0A0A0B;        /* background principal body */
  --bg-2: #121214;        /* sections alternes */
  --bg-3: #18181B;        /* cards, surfaces élevées */
  --bg-4: #1F1F23;        /* surfaces hover, focus */

  --border: #26262B;
  --border-strong: #2E2E34;

  /* Texte */
  --text: #F4F4F5;        /* texte principal */
  --text-dim: #A1A1AA;    /* texte secondaire */
  --text-muted: #71717A;  /* labels, meta */

  --font-display: 'Archivo', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --max-w: 1240px;
  --radius: 4px;
  --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
  --shadow-red: 0 16px 40px -12px rgba(227, 6, 19, 0.4);

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; background: var(--bg-1); }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-1);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video, svg { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--red); }
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.4em;
  color: var(--text);
}
h1 { font-size: clamp(2.4rem, 5.2vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 1.8vw, 1.4rem); }
p { margin: 0 0 1em; color: var(--text-dim); }
p.lead { font-size: 1.1rem; color: var(--text-dim); max-width: 60ch; }
ul { padding-left: 1.2em; }
ul li { color: var(--text-dim); }
strong { color: var(--text); }
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

::selection { background: var(--red); color: var(--text); }

/* ---------- Utilitaires ---------- */
.section { padding: clamp(64px, 9vw, 120px) 0; background: var(--bg-1); }
.section--dark { background: var(--bg-0); position: relative; }
.section--dark p { color: var(--text-dim); }
.section--dark h2, .section--dark h3 { color: var(--text); }
.section--fog { background: var(--bg-2); }

/* Numéro de section : /01 /02 — signature btek */
.section-index {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--red);
  letter-spacing: 0.12em;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.section-index::before { content: "/ "; opacity: 0.5; }

.section-title { margin-bottom: 0.5em; }
.section-lead { color: var(--text-dim); font-size: 1.1rem; max-width: 62ch; margin-bottom: 48px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all .25s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--red);
  color: #FFFFFF;
  box-shadow: 0 8px 24px -8px rgba(227, 6, 19, 0.5);
}
.btn--primary:hover {
  background: var(--red-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-red);
}
.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-strong);
}
.btn--ghost:hover {
  background: var(--bg-3);
  color: var(--text);
  border-color: var(--red);
}
.btn--lg { padding: 18px 32px; font-size: 1rem; }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.header-brand { display: flex; align-items: center; gap: 12px; }
.header-logo {
  height: 114px;
  width: auto;
  filter: drop-shadow(0 4px 16px rgba(227, 6, 19, 0.35));
  transition: transform .3s var(--ease);
}
.header-brand:hover .header-logo { transform: scale(1.04); }
@media (max-width: 720px) {
  .header-logo { height: 83px; }
}
.header-nav { display: flex; gap: 32px; align-items: center; }
.header-nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  position: relative;
  padding: 8px 0;
}
.header-nav a:hover { color: var(--text); }
.header-nav a.active { color: var(--text); }
.header-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--red);
  transition: width .25s var(--ease);
}
.header-nav a:hover::after,
.header-nav a.active::after { width: 100%; }

.header-cta { display: flex; align-items: center; gap: 12px; }
.header-phone {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.header-phone::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(227, 6, 19, 0.2);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 4px;
}
.menu-toggle:active { background: var(--bg-3); }
.menu-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all .25s var(--ease);
}

/* Mobile menu caché par défaut */
.mobile-menu { display: none; }

/* Mobile */
@media (max-width: 960px) {
  .header-nav, .header-phone { display: none; }
  .menu-toggle { display: flex; }
  .mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-1);
    padding: 132px 28px 40px;
    transform: translateX(100%);
    transition: transform .3s var(--ease);
    z-index: 49;
    display: flex;
    flex-direction: column;
    gap: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }
  .mobile-menu.open { transform: translateX(0); }
  .mobile-menu a {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.55rem;
    letter-spacing: -0.01em;
    padding: 22px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .mobile-menu a:not(.btn)::after {
    content: "→";
    color: var(--red);
    font-size: 1.4rem;
    opacity: 0;
    transform: translateX(-8px);
    transition: all .2s var(--ease);
  }
  .mobile-menu a:hover,
  .mobile-menu a:active { color: var(--red); }
  .mobile-menu a:hover::after,
  .mobile-menu a:active::after { opacity: 1; transform: translateX(0); }
  .mobile-menu .btn {
    margin-top: 28px;
    justify-content: center;
    font-size: 1rem;
    padding: 18px 24px;
  }
  .mobile-menu .btn::after { display: none; }
  body.menu-open { overflow: hidden; }
  .menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.open span:nth-child(2) { opacity: 0; }
  .menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Zone intermédiaire : menu desktop visible + grand logo -> on resserre */
@media (max-width: 1140px) and (min-width: 961px) {
  .header-nav { gap: 22px; }
  .header-phone { display: none; }
}

/* ---------- Barre CTA collante (mobile) ---------- */
.mobile-cta-bar { display: none; }
@media (max-width: 720px) {
  .mobile-cta-bar {
    display: flex;
    gap: 10px;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 45;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
    background: rgba(10, 10, 11, 0.92);
    backdrop-filter: blur(12px) saturate(1.4);
    -webkit-backdrop-filter: blur(12px) saturate(1.4);
    border-top: 1px solid var(--border);
  }
  .mobile-cta-bar .btn {
    flex: 1;
    justify-content: center;
    padding: 14px 12px;
    font-size: 0.92rem;
  }
  .mobile-cta-bar .btn--ghost { flex: 0 0 38%; }
  /* éviter que la barre fixe ne masque la fin de page (uniquement si la barre existe) */
  body:has(.mobile-cta-bar) { padding-bottom: 76px; }
}

/* ---------- Hero split asymétrique ---------- */
.hero {
  padding: clamp(48px, 8vw, 96px) 0 clamp(64px, 10vw, 120px);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 20%, rgba(227, 6, 19, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 10% 80%, rgba(227, 6, 19, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%);
}
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -10%;
  width: 55%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-3) 0%, var(--bg-2) 100%);
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.6;
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 24px;
}
.hero-label::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--red);
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--red) 0%, #FF3B3B 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.08em;
  height: 0.12em;
  background: var(--red);
  opacity: 0.25;
  z-index: -1;
}
.hero-sub {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 52ch;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-trust {
  margin-top: 20px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

@media (max-width: 860px) {
  .hero::before { display: none; }
}

/* ---------- Bandeau « métal en fusion » ----------
   Défilement infini (2 copies + translateX -50%), dégradé rouge->inox
   qui balaie les lettres. Tout sur transform/opacity (GPU). */
.mq {
  position: relative;
  overflow: hidden;
  background: var(--bg-0);
  border-top: 1px solid var(--red);
  border-bottom: 1px solid var(--red);
  padding: 22px 0;
}
.mq-track {
  display: flex;
  width: max-content;
  white-space: nowrap;
  will-change: transform;
  animation: mq-scroll 34s linear infinite;
}
.mq:hover .mq-track { animation-play-state: paused; }
.mq-set { display: flex; align-items: center; flex: none; }
.mq-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0 28px;
  background: linear-gradient(100deg,
    #71717A 0%, #F4F4F5 18%, #A1A1AA 34%,
    var(--red) 48%, var(--red-hover) 53%, #A1A1AA 68%,
    #F4F4F5 84%, #71717A 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 7px rgba(227, 6, 19, 0.22));
  animation: mq-sweep 5s linear infinite;
}
.mq-sep {
  flex: none;
  width: 9px; height: 9px;
  background: linear-gradient(135deg, #F4F4F5, #71717A);
  transform: rotate(45deg);
  box-shadow: 0 0 6px rgba(244, 244, 245, 0.25);
}
@keyframes mq-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes mq-sweep  { from { background-position: 0% 0; } to { background-position: -220% 0; } }
@media (prefers-reduced-motion: reduce) {
  .mq-track { animation: none !important; transform: none !important; }
  .mq-word { animation: none !important; background-position: 35% 0; }
}

/* ---------- Services grid ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.service-card {
  position: relative;
  padding: 36px 28px 32px;
  background: linear-gradient(180deg, var(--bg-3) 0%, var(--bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .3s var(--ease);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 0;
  height: 3px;
  background: var(--red);
  transition: width .35s var(--ease);
}
.service-card::after {
  content: "";
  position: absolute;
  bottom: -60%;
  right: -20%;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(227, 6, 19, 0.06) 0%, transparent 70%);
  opacity: 0;
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--red);
  background: linear-gradient(180deg, var(--bg-4) 0%, var(--bg-3) 100%);
}
.service-card:hover::before { width: 100%; }
.service-card:hover::after { opacity: 1; transform: translate(-20%, -20%); }
.service-icon {
  width: 44px;
  height: 44px;
  color: var(--red);
  margin-bottom: 20px;
  stroke-width: 1.5;
}
.service-num {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--red);
  letter-spacing: 0.12em;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}
.service-card h3 { margin-bottom: 12px; }
.service-card p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 20px; }
.service-link {
  margin-top: auto;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.service-link:hover { color: var(--red); }
.service-link::after { content: "→"; transition: transform .25s var(--ease); }
.service-link:hover::after { transform: translateX(4px); }

/* ---------- 3 colonnes "Pourquoi Btek" ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}
.pillar {
  position: relative;
  padding: 40px 0 32px;
  border-top: 2px solid var(--red);
}
.pillar-big-num {
  position: absolute;
  top: 24px;
  right: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 6rem;
  line-height: 1;
  color: rgba(227, 6, 19, 0.12);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}
.pillar-num {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--red);
  letter-spacing: 0.12em;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  position: relative;
  z-index: 1;
}
.pillar h3 { margin-bottom: 12px; color: var(--text); position: relative; z-index: 1; }
.pillar p { color: #BFBFBF; font-size: 0.95rem; position: relative; z-index: 1; }

/* Background subtil sur section dark (encore plus noir) */
.section--dark {
  background:
    radial-gradient(circle at 20% 0%, rgba(227, 6, 19, 0.10) 0%, transparent 40%),
    radial-gradient(circle at 80% 100%, rgba(227, 6, 19, 0.06) 0%, transparent 40%),
    var(--bg-0);
  position: relative;
}
.section--dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, black 0%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 0%, transparent 100%);
}
.section--dark > .container { position: relative; z-index: 1; }

/* ---------- Process horizontal ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.process::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(to right, var(--border) 0%, var(--red) 50%, var(--border) 100%);
  z-index: 0;
}
.process-step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 12px;
}
.process-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--bg-3);
  border: 2px solid var(--red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--red);
  font-variant-numeric: tabular-nums;
  box-shadow: 0 0 0 4px rgba(227, 6, 19, 0.08);
}
.process-step h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.process-step p { font-size: 0.88rem; color: var(--text-dim); margin: 0; }

@media (max-width: 720px) {
  .process { grid-template-columns: 1fr 1fr; gap: 32px; }
  .process::before { display: none; }
}

/* ---------- Galerie mosaïque ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 240px 240px;
  gap: 12px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-3);
  border: 1px solid var(--border);
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,10,0.7) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .3s var(--ease);
}
.gallery-item:hover::after { opacity: 1; }
.gallery-item .caption {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  z-index: 1;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.gallery-item:hover .caption { opacity: 1; transform: translateY(0); }
.gallery-item--wide { grid-column: span 2; }
.gallery-item--tall { grid-row: span 2; }

@media (max-width: 820px) {
  .gallery { grid-template-columns: repeat(2, 1fr); grid-template-rows: 180px 180px 180px 180px; }
  .gallery-item--wide, .gallery-item--tall { grid-column: span 1; grid-row: span 1; }
}

/* ---------- Atelier split ---------- */
.atelier-split {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: center;
}
.atelier-split img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/5;
  object-fit: cover;
}
.atelier-info dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px 24px;
  margin: 24px 0 32px;
}
.atelier-info dt {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.atelier-info dd { margin: 0; color: var(--text); }

@media (max-width: 820px) {
  .atelier-split { grid-template-columns: 1fr; }
}

/* ---------- CTA final ---------- */
.cta-final {
  position: relative;
  overflow: hidden;
}
.cta-final::before {
  content: "SUR-MESURE";
  position: absolute;
  top: 50%;
  right: -40px;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(6rem, 14vw, 12rem);
  color: rgba(227, 6, 19, 0.08);
  letter-spacing: -0.04em;
  white-space: nowrap;
  pointer-events: none;
}
.cta-final-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-final h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); margin-bottom: 20px; }
.cta-final p { color: var(--text-dim); font-size: 1.1rem; margin-bottom: 32px; }
.cta-final-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-0);
  color: var(--text-dim);
  padding: 64px 0 32px;
  border-top: 3px solid var(--red);
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--red), transparent);
  opacity: 0.6;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand img {
  height: 64px;
  margin-bottom: 16px;
  filter: drop-shadow(0 2px 8px rgba(227, 6, 19, 0.2));
}
.footer-brand p { color: var(--text-dim); font-size: 0.92rem; }
.footer h4 {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
}
.footer-list { list-style: none; padding: 0; margin: 0; }
.footer-list li { margin-bottom: 10px; color: var(--text-dim); }
.footer-list a { color: var(--text-dim); font-size: 0.92rem; }
.footer-list a:hover { color: var(--red); }
.footer-social {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  background: var(--bg-2);
  transition: all .2s var(--ease);
}
.footer-social:hover {
  border-color: var(--red);
  color: var(--red);
  background: var(--bg-3);
}
.footer-social svg { flex-shrink: 0; }
.footer-socials {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-mail {
  display: inline-block;
  color: var(--text-dim);
  font-size: 0.9rem;
  word-break: break-word;
}
.footer-mail:hover { color: var(--red); }
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Page interne (sub-pages) ---------- */
.page-hero {
  padding: 80px 0 64px;
  background:
    radial-gradient(ellipse at 80% 30%, rgba(227, 6, 19, 0.14) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, black, transparent);
  -webkit-mask-image: linear-gradient(to bottom, black, transparent);
  pointer-events: none;
}
.page-hero > .container { position: relative; z-index: 1; }
.breadcrumb {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--red); }
.breadcrumb .sep { margin: 0 10px; color: var(--border-strong); }
.page-hero h1 { margin-bottom: 16px; }
.page-hero p { font-size: 1.1rem; color: var(--text-dim); max-width: 62ch; }

.content-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: start;
}
.content-main h2 { margin-top: 40px; }
.content-main h2:first-child { margin-top: 0; }
.content-main p { color: var(--text-dim); }
.content-main ul li { margin-bottom: 10px; color: var(--text-dim); }

.sidebar-card {
  position: sticky;
  top: 150px;
  padding: 32px 28px;
  background: linear-gradient(180deg, var(--bg-3) 0%, var(--bg-2) 100%);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.sidebar-card h3 { color: var(--text); margin-bottom: 16px; }
.sidebar-card p { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 24px; }
.sidebar-card .btn { width: 100%; justify-content: center; margin-bottom: 12px; }

@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; gap: 40px; }
  .sidebar-card { position: static; }
}

/* Tableau de gains */
.gains-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-variant-numeric: tabular-nums;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.gains-table th, .gains-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.gains-table tbody tr:last-child td { border-bottom: 0; }
.gains-table tbody tr:hover { background: var(--bg-3); }
.gains-table thead th {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  background: var(--bg-3);
}
.gains-table td.gain { color: var(--red); font-weight: 700; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
}
.contact-info dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px 24px;
  margin-bottom: 32px;
}
.contact-info dt {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.contact-info dd { margin: 0; }
.contact-info dd a { color: var(--text); font-weight: 500; }
.contact-info dd a:hover { color: var(--red); }

.form-field {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}
.form-field label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 14px 16px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-2);
  color: var(--text);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-muted); }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--red);
  background: var(--bg-3);
  box-shadow: 0 0 0 4px rgba(227, 6, 19, 0.12);
}
.form-field textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-hp { position: absolute; left: -9999px; } /* honeypot */
.form-hint { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 20px; }
.form-field .req { color: var(--red); }
.form-field .opt {
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
}

@media (max-width: 820px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
}

/* ---------- Reveal animations (pas de fade générique) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Étagement doux des grilles (apparition séquencée) */
.services-grid > .reveal:nth-child(2),
.pillars > .reveal:nth-child(2),
.key-stats > .reveal:nth-child(2),
.process > .reveal:nth-child(2) { transition-delay: .07s; }
.services-grid > .reveal:nth-child(3),
.pillars > .reveal:nth-child(3),
.key-stats > .reveal:nth-child(3),
.process > .reveal:nth-child(3) { transition-delay: .14s; }
.services-grid > .reveal:nth-child(4),
.key-stats > .reveal:nth-child(4),
.process > .reveal:nth-child(4) { transition-delay: .21s; }
.services-grid > .reveal:nth-child(5) { transition-delay: .28s; }

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

/* Ajustements mobile globaux */
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .hero--cinematic { min-height: 460px; }
  .hero--cinematic .container { padding-top: 48px; padding-bottom: 48px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; width: 100%; }
  .btn--lg { padding: 14px 22px; font-size: 0.92rem; }
  h1 { font-size: clamp(2rem, 8vw, 2.6rem); }
  h2 { font-size: clamp(1.5rem, 6vw, 2rem); }
  .key-stats { grid-template-columns: 1fr 1fr; }
  .key-stat { padding-left: 16px; padding-right: 8px; }
  .mq-word { font-size: 0.95rem; padding: 0 18px; }
  .mq-track { animation-duration: 24s; }
  .footer-social { font-size: 0.82rem; padding: 8px 12px; }
  .gains-table { font-size: 0.82rem; }
  .gains-table th, .gains-table td { padding: 10px 8px; }

  /* Header mobile : cache Devis, garde uniquement burger pour laisser la place au logo */
  .header-cta .btn--primary { display: none; }
  .header-cta { gap: 4px; }
  .header-inner { padding: 10px 16px; gap: 12px; }
  .header-logo { height: 73px; }
  .mobile-menu { padding-top: 116px; }
}

/* iPhone SE / très petits écrans */
@media (max-width: 380px) {
  .header-logo { height: 62px; }
  .header-inner { padding: 10px 12px; }
  .mobile-menu { padding-top: 104px; }
  .mobile-menu a { font-size: 1.35rem; padding: 20px 0; }
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s var(--ease);
}
.faq-item[open] { border-color: var(--red); }
.faq-item summary {
  padding: 20px 24px;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.6rem;
  color: var(--red);
  transition: transform .25s var(--ease);
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body {
  padding: 0 24px 20px;
  color: var(--text-dim);
}
.faq-body p:last-child { margin-bottom: 0; }

/* ---------- Section chiffres-clés enrichie ---------- */
.key-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 40px;
}
.key-stat {
  text-align: center;
  padding: 24px 12px;
  border-left: 2px solid var(--red);
  padding-left: 24px;
  text-align: left;
}
.key-stat-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  color: var(--text);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--text) 0%, var(--red) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.key-stat-label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

@media (max-width: 820px) {
  .key-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

/* Hero renforcé avec image cinématographique */
.hero--cinematic {
  position: relative;
  min-height: 560px;
  padding: 0;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero--cinematic::before,
.hero--cinematic::after { display: none; }
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 40%, rgba(227, 6, 19, 0.3) 0%, transparent 50%),
    linear-gradient(90deg, rgba(10, 10, 11, 0.96) 0%, rgba(10, 10, 11, 0.7) 50%, rgba(10, 10, 11, 0.85) 100%),
    linear-gradient(to bottom, transparent 0%, var(--bg-1) 100%);
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
  z-index: 1;
}
.hero--cinematic .container {
  position: relative;
  z-index: 2;
  padding-top: 80px;
  padding-bottom: 80px;
}

/* ---------- 404 ---------- */
.page-404 {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
  background:
    radial-gradient(circle at center, rgba(227, 6, 19, 0.15) 0%, transparent 50%),
    var(--bg-1);
}
.page-404 .code {
  font-family: var(--font-display);
  font-size: clamp(6rem, 18vw, 12rem);
  color: var(--red);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}