/* style.css — Bureau d'Ingénierie Générale */
@import url('tokens.css');
@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@400;600;700&family=Inter:wght@400;500;600&display=swap');

/* ─── Reset & base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ─── Container ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ─── Typographie ─── */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: var(--font-bold);
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
h1 { font-size: clamp(2rem, 6vw, var(--text-6xl)); }
h2 { font-size: clamp(1.5rem, 4vw, var(--text-4xl)); }
h3 { font-size: clamp(1.125rem, 3vw, var(--text-2xl)); }
h4 { font-size: var(--text-xl); font-weight: var(--font-semibold); }
p { margin-bottom: var(--space-4); max-width: 68ch; }
p:last-child { margin-bottom: 0; }

/* ─── Boutons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition-base);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inv);
}
.btn-primary:hover {
  background: #c26020;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-outline {
  border: 2px solid var(--color-text-inv);
  color: var(--color-text-inv);
}
.btn-outline:hover {
  background: var(--color-text-inv);
  color: var(--color-primary);
}
.btn-dark {
  background: var(--color-primary);
  color: var(--color-text-inv);
}
.btn-dark:hover {
  background: var(--color-secondary);
  transform: translateY(-1px);
}

/* ─── Visual Placeholder ─── */
.visual-placeholder {
  display: block;
  width: 100%;
  border-radius: var(--radius-md);
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-primary) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-primary) 10%, var(--color-bg)) 55%,
      color-mix(in srgb, var(--color-secondary) 18%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-aspect="4:3"]  { aspect-ratio: 4 / 3; }
.visual-placeholder[data-aspect="1:1"]  { aspect-ratio: 1 / 1; }
.visual-placeholder[data-aspect="3:4"]  { aspect-ratio: 3 / 4; }
.visual-placeholder[data-aspect="21:9"] { aspect-ratio: 21 / 9; }
.visual-placeholder[data-tone="secondary"] {
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-secondary) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-secondary) 10%, var(--color-bg)) 55%,
      color-mix(in srgb, var(--color-primary) 16%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-tone="accent"] {
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--color-accent, var(--color-primary)) 22%, var(--color-bg)) 0%,
      color-mix(in srgb, var(--color-primary) 12%, var(--color-bg)) 60%,
      color-mix(in srgb, var(--color-secondary) 16%, var(--color-bg)) 100%
    );
}
.visual-placeholder[data-tone="muted"] {
  background: color-mix(in srgb, var(--color-text) 8%, var(--color-bg));
}

/* ─── Section label ─── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
}

/* ─── Top bar ─── */
.topbar {
  background: var(--color-bg-dark);
  color: var(--color-text-inv);
  font-size: var(--text-sm);
  padding: var(--space-2) 0;
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.topbar a {
  color: var(--color-text-inv);
  opacity: 0.85;
  transition: opacity var(--transition-fast);
}
.topbar a:hover { opacity: 1; }
.topbar-contact {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

/* ─── Header / Nav ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.nav-logo svg { height: 40px; width: auto; }
.nav-brand {
  display: flex;
  flex-direction: column;
}
.nav-brand-acronym {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.nav-brand-full {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,.7);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.2;
  max-width: 180px;
}
.nav-links {
  display: none;
  gap: var(--space-8);
  align-items: center;
}
.nav-links a {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
  transition: color var(--transition-fast);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-accent);
}
.nav-cta { display: none; }
.nav-burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
}
.nav-burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-inv);
  transition: all var(--transition-base);
  transform-origin: center;
}
.nav-burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--color-bg-dark);
  padding: var(--space-6) var(--container-pad);
  gap: var(--space-1);
}
.mobile-menu.is-open { display: flex; }
.mobile-menu a {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  color: rgba(255,255,255,.85);
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}
.mobile-menu a:hover,
.mobile-menu a[aria-current="page"] { color: var(--color-accent); }
.mobile-menu .btn { margin-top: var(--space-4); align-self: flex-start; }

/* ─── Hero ─── */
.hero {
  background: var(--color-bg-dark);
  color: var(--color-text-inv);
  padding: var(--space-20) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--color-primary) 95%, transparent) 0%,
    color-mix(in srgb, var(--color-secondary) 40%, var(--color-bg-dark)) 100%
  );
  opacity: 0.6;
}
.hero .container { position: relative; z-index: 1; }
.hero-grid {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}
.hero-eyebrow {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
}
.hero h1 {
  color: var(--color-text-inv);
  margin-bottom: var(--space-6);
}
.hero h1 span { color: var(--color-accent); }
.hero-lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,.8);
  max-width: 54ch;
  margin-bottom: var(--space-8);
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero-visual { position: relative; }
.hero-visual .visual-placeholder {
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 3;
}

/* ─── Stats bar ─── */
.stats-bar {
  background: var(--color-accent);
  color: var(--color-text-inv);
  padding: var(--space-8) 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: 1;
  margin-bottom: var(--space-1);
}
.stat-label {
  font-size: var(--text-sm);
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ─── Section commune ─── */
.section {
  padding: var(--space-20) 0;
}
.section-alt {
  padding: var(--space-20) 0;
  background: var(--color-bg-alt);
}
.section-dark {
  padding: var(--space-20) 0;
  background: var(--color-bg-dark);
  color: var(--color-text-inv);
}
.section-header {
  margin-bottom: var(--space-12);
}
.section-header h2 { margin-bottom: var(--space-4); }
.section-header p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

/* ─── Prestations cards (accueil) ─── */
.prestations-grid {
  display: grid;
  gap: var(--space-6);
}
.prestation-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
}
.prestation-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}
.prestation-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.prestation-icon {
  width: 48px;
  height: 48px;
  background: color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}
.prestation-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}
.prestation-card p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}
.prestation-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: var(--space-4);
  transition: gap var(--transition-fast);
}
.prestation-link:hover { gap: var(--space-3); }

/* ─── Expertise diptyque ─── */
.expertise-grid {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}
.expertise-content h2 { margin-bottom: var(--space-6); }
.expertise-points { list-style: none; margin-bottom: var(--space-8); }
.expertise-points li {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border-light);
  align-items: flex-start;
}
.expertise-points li:last-child { border-bottom: none; }
.expertise-check {
  width: 22px;
  height: 22px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.expertise-check svg { width: 12px; height: 12px; stroke: #fff; }
.expertise-points strong { display: block; margin-bottom: var(--space-1); }

/* ─── Zones d'intervention ─── */
.zones-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.zone-tag {
  background: color-mix(in srgb, var(--color-secondary) 12%, var(--color-bg-alt));
  border: 1px solid color-mix(in srgb, var(--color-secondary) 25%, var(--color-border));
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

/* ─── CTA section ─── */
.cta-section {
  background: var(--color-primary);
  color: var(--color-text-inv);
  padding: var(--space-20) 0;
  text-align: center;
}
.cta-section h2 { color: var(--color-text-inv); margin-bottom: var(--space-4); }
.cta-section p { color: rgba(255,255,255,.8); max-width: 56ch; margin-inline: auto; margin-bottom: var(--space-8); }
.cta-actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }

/* ─── Page hero (pages secondaires) ─── */
.page-hero {
  background: var(--color-primary);
  color: var(--color-text-inv);
  padding: var(--space-16) 0 var(--space-12);
}
.page-hero-eyebrow {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
.page-hero h1 { color: var(--color-text-inv); margin-bottom: var(--space-4); }
.page-hero p {
  font-size: var(--text-lg);
  color: rgba(255,255,255,.75);
  max-width: 60ch;
}

/* ─── Breadcrumb ─── */
.breadcrumb {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-16);
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--color-secondary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--color-text-muted); }

/* ─── Services page — détail ─── */
.service-block {
  display: grid;
  gap: var(--space-10);
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border-light);
  align-items: start;
}
.service-block:last-child { border-bottom: none; }
.service-number {
  font-family: var(--font-heading);
  font-size: var(--text-6xl);
  font-weight: var(--font-bold);
  color: color-mix(in srgb, var(--color-primary) 12%, var(--color-bg-alt));
  line-height: 1;
  user-select: none;
}
.service-content h3 { margin-bottom: var(--space-4); color: var(--color-primary); }
.service-content p { color: var(--color-text-muted); }
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}
.service-tag {
  background: color-mix(in srgb, var(--color-accent) 12%, var(--color-bg));
  color: var(--color-primary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid color-mix(in srgb, var(--color-accent) 25%, transparent);
}

/* ─── À-propos page ─── */
.about-grid {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}
.about-visual .visual-placeholder { border-radius: var(--radius-lg); }
.timeline { position: relative; padding-left: var(--space-8); }
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) + 0px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-accent);
}
.timeline-year {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-1);
}
.timeline-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}
.timeline-desc { font-size: var(--text-sm); color: var(--color-text-muted); }

/* Valeurs */
.valeurs-grid { display: grid; gap: var(--space-4); }
.valeur-item {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  padding: var(--space-6);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
}
.valeur-icon {
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent);
}
.valeur-content h4 { margin-bottom: var(--space-2); color: var(--color-primary); }
.valeur-content p { font-size: var(--text-sm); color: var(--color-text-muted); margin: 0; }

/* ─── Contact page ─── */
.contact-grid {
  display: grid;
  gap: var(--space-12);
}
.contact-info { display: flex; flex-direction: column; gap: var(--space-6); }
.contact-card {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}
.contact-card-icon {
  width: 48px;
  height: 48px;
  background: color-mix(in srgb, var(--color-primary) 10%, var(--color-bg));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}
.contact-card-body strong {
  display: block;
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
  color: var(--color-primary);
}
.contact-card-body a {
  color: var(--color-secondary);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
}
.contact-card-body a:hover { text-decoration: underline; }

/* Formulaire */
.contact-form-wrap {
  background: var(--color-bg-alt);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}
.contact-form-wrap h3 {
  font-size: var(--text-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}
.form-group { margin-bottom: var(--space-5); }
.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition-fast);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-secondary) 20%, transparent);
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-row { display: grid; gap: var(--space-4); }

/* Map */
.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 320px;
  margin-top: var(--space-8);
}
.map-wrap iframe { width: 100%; height: 100%; border: none; }

/* Mentions légales */
.legal-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  line-height: 1.5;
}

/* ─── Mentions légales page ─── */
.legal-content h2 {
  font-size: var(--text-2xl);
  margin: var(--space-10) 0 var(--space-4);
  color: var(--color-primary);
}
.legal-content h3 {
  font-size: var(--text-xl);
  margin: var(--space-8) 0 var(--space-3);
  color: var(--color-primary);
}
.legal-content p, .legal-content li {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
.legal-content ul { padding-left: var(--space-6); list-style: disc; }

/* ─── Footer ─── */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,.75);
  padding: var(--space-16) 0 var(--space-8);
}
.footer-grid {
  display: grid;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}
.footer-brand .nav-brand-acronym {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-2);
  display: block;
}
.footer-brand p {
  font-size: var(--text-sm);
  opacity: 0.7;
  max-width: 30ch;
}
.footer-col h4 {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-inv);
  margin-bottom: var(--space-5);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-links a {
  color: rgba(255,255,255,.65);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.footer-links a:hover { color: var(--color-accent); }
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-contact-item {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-size: var(--text-sm);
  color: rgba(255,255,255,.65);
}
.footer-contact-item svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 2px; opacity: 0.7; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.5); transition: color var(--transition-fast); }
.footer-bottom a:hover { color: var(--color-accent); }

/* ─── Skip link ─── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  background: var(--color-accent);
  color: var(--color-text-inv);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  z-index: 9999;
  font-weight: var(--font-bold);
}

/* ─── Tablet (≥ 768px) ─── */
@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-burger { display: none; }
  .mobile-menu { display: none !important; }

  .hero-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .prestations-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr 1fr; }
  .expertise-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .valeurs-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .service-block { grid-template-columns: 80px 1fr; }
}

/* ─── Desktop (≥ 1024px) ─── */
@media (min-width: 1024px) {
  .prestations-grid { grid-template-columns: repeat(3, 1fr); }
  .service-block { grid-template-columns: 100px 1fr 320px; }
}

/* ─── Animations (Template A · atelier technique institutionnel) ─── */
@media (prefers-reduced-motion: no-preference) {
  /* Base reveal — piloté par IntersectionObserver (main.js) */
  .fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition:
      opacity 0.7s cubic-bezier(.16,.84,.32,1),
      transform 0.7s cubic-bezier(.16,.84,.32,1);
    will-change: opacity, transform;
  }
  .fade-up.is-visible {
    opacity: 1;
    transform: none;
  }

  /* Hero — entrée séquencée, sans dépendance JS (chargement page) */
  .hero-eyebrow {
    animation: bigEyebrowIn 0.7s cubic-bezier(.16,.84,.32,1) both;
  }
  .hero-eyebrow::before {
    animation: bigBarGrow 0.6s cubic-bezier(.6,0,.2,1) 0.15s both;
    transform-origin: left center;
  }
  .hero h1 {
    animation: bigHeroText 0.75s cubic-bezier(.16,.84,.32,1) 0.1s both;
  }
  .hero-lead {
    animation: bigHeroText 0.75s cubic-bezier(.16,.84,.32,1) 0.25s both;
  }
  .hero-actions {
    animation: bigHeroText 0.75s cubic-bezier(.16,.84,.32,1) 0.35s both;
  }
  .hero-visual {
    animation: bigHeroVisual 0.85s cubic-bezier(.16,.84,.32,1) 0.2s both;
  }

  @keyframes bigEyebrowIn {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: none; }
  }
  @keyframes bigHeroText {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: none; }
  }
  @keyframes bigHeroVisual {
    from { opacity: 0; transform: translateY(24px) scale(.98); }
    to   { opacity: 1; transform: none; }
  }
  @keyframes bigBarGrow {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
  }

  /* Section-label — barre latérale qui pousse au reveal */
  .section-label::before {
    transform-origin: left center;
    transition: transform 0.55s cubic-bezier(.6,0,.2,1) 0.1s;
  }
  .fade-up:not(.is-visible) .section-label::before,
  .section-header:not(.is-visible) .section-label::before {
    transform: scaleX(0);
  }

  /* Prestation cards — accent-bar qui descend, hover mesuré, chevron */
  .prestation-card {
    transition:
      box-shadow 0.35s ease,
      transform 0.35s cubic-bezier(.16,.84,.32,1),
      border-color 0.35s ease;
  }
  .prestation-card::before {
    transform: scaleY(0);
    transform-origin: top center;
    transition: transform 0.5s cubic-bezier(.6,0,.2,1);
  }
  .prestation-card:hover,
  .prestation-card:focus-within {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border-light));
  }
  .prestation-card:hover::before,
  .prestation-card:focus-within::before {
    transform: scaleY(1);
  }
  .prestation-card.is-visible::before {
    transform: scaleY(1);
  }
  .prestation-icon {
    transition:
      background-color 0.35s ease,
      color 0.35s ease,
      transform 0.4s cubic-bezier(.16,.84,.32,1);
  }
  .prestation-card:hover .prestation-icon {
    background: color-mix(in srgb, var(--color-accent) 18%, var(--color-bg));
    color: var(--color-accent);
    transform: rotate(-4deg) scale(1.05);
  }
  .prestation-link svg {
    transition: transform 0.3s cubic-bezier(.16,.84,.32,1);
  }
  .prestation-link:hover svg {
    transform: translateX(4px);
  }

  /* Stats bar — apparition en cascade à la première vue */
  .stats-bar .stat-item {
    opacity: 0;
    transform: translateY(12px);
    animation: bigHeroText 0.6s cubic-bezier(.16,.84,.32,1) both;
  }
  .stats-bar .stat-item:nth-child(1) { animation-delay: 0.55s; }
  .stats-bar .stat-item:nth-child(2) { animation-delay: 0.65s; }
  .stats-bar .stat-item:nth-child(3) { animation-delay: 0.75s; }
  .stats-bar .stat-item:nth-child(4) { animation-delay: 0.85s; }
  .stat-number {
    transition: transform 0.35s cubic-bezier(.16,.84,.32,1), color 0.35s ease;
  }
  .stat-item:hover .stat-number {
    transform: translateY(-2px) scale(1.03);
  }

  /* Nav-links — soulignement animé (kept discret sur nav sombre) */
  .nav-links a {
    position: relative;
  }
  .nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right center;
    transition: transform 0.3s cubic-bezier(.6,0,.2,1);
  }
  .nav-links a:hover::after,
  .nav-links a:focus-visible::after,
  .nav-links a[aria-current="page"]::after {
    transform: scaleX(1);
    transform-origin: left center;
  }

  /* Expertise points — check qui vient d'un rebond léger, ligne au hover */
  .expertise-points li {
    transition: background-color 0.35s ease, padding-left 0.35s cubic-bezier(.16,.84,.32,1);
  }
  .expertise-points li:hover {
    background: color-mix(in srgb, var(--color-accent) 5%, transparent);
    padding-left: var(--space-3);
  }
  .expertise-check {
    transition: transform 0.4s cubic-bezier(.34,1.56,.64,1);
  }
  .expertise-points li:hover .expertise-check {
    transform: rotate(-8deg) scale(1.1);
  }

  /* Zone tags — hover discret métier */
  .zone-tag {
    transition:
      background-color 0.3s ease,
      color 0.3s ease,
      transform 0.3s cubic-bezier(.16,.84,.32,1);
  }
  .zone-tag:hover {
    background: var(--color-accent);
    color: var(--color-text-inv);
    transform: translateY(-2px);
  }

  /* CTA — halo de fond qui glisse lentement */
  .cta-section {
    position: relative;
    overflow: hidden;
  }
  .cta-section::after {
    content: '';
    position: absolute;
    inset: -20% -40%;
    background: radial-gradient(
      ellipse at 30% 50%,
      color-mix(in srgb, var(--color-accent) 22%, transparent) 0%,
      transparent 55%
    );
    opacity: 0;
    z-index: 0;
    pointer-events: none;
    animation: bigCtaHalo 14s ease-in-out infinite;
  }
  .cta-section > .container { position: relative; z-index: 1; }
  @keyframes bigCtaHalo {
    0%, 100% { transform: translate3d(-6%, 0, 0); opacity: 0.35; }
    50%      { transform: translate3d( 6%, 0, 0); opacity: 0.7; }
  }

  /* Visual placeholders — dégradé qui respire + lift au survol du conteneur */
  .visual-placeholder {
    background-size: 180% 180%;
    background-position: 0% 0%;
    transition:
      transform 0.5s cubic-bezier(.16,.84,.32,1),
      box-shadow 0.5s ease,
      background-position 1.2s ease;
  }
  .hero-visual:hover .visual-placeholder,
  .expertise-visual:hover .visual-placeholder,
  .about-visual:hover .visual-placeholder {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background-position: 100% 100%;
  }

  /* Focus-visible — halo accent partout où c'est cliquable */
  a:focus-visible,
  button:focus-visible,
  .btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    transition: outline-offset 0.2s ease;
  }

  /* Boutons — micro-lift + shadow sur .btn-outline / .btn-dark aussi */
  .btn-outline:hover,
  .btn-dark:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }
}

/* ─── Accessibilité — kill-switch mouvement (WCAG 2.3.3) ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .fade-up { opacity: 1 !important; transform: none !important; }
  .prestation-card::before { transform: scaleY(1) !important; }
  .section-label::before { transform: scaleX(1) !important; }
}