/* ============================================
   OITS — OIT Solutions
   Design hybride tech moderne
   ============================================ */

:root {
  /* Couleurs principales (inspirées du logo) */
  --bg-dark: #0a0f1e;
  --bg-dark-2: #0f172a;
  --bg-light: #f8fafc;
  --bg-card: #ffffff;
  --text-dark: #0f172a;
  --text-light: #ffffff;
  --text-muted: #64748b;
  --text-muted-dark: #94a3b8;

  /* Bleus OITS */
  --blue-100: #dbeafe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-900: #1e3a8a;
  --cyan: #38bdf8;

  /* Bordures & surfaces */
  --border: rgba(148, 163, 184, 0.2);
  --border-dark: rgba(96, 165, 250, 0.2);

  /* Typographie */
  --font-display: 'Sora', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Espaces */
  --container-max: 1280px;
  --radius: 14px;
  --radius-lg: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   FOND ANIMÉ CIRCUIT (hero uniquement)
   ============================================ */
.circuit-bg {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 100vh;
  min-height: 700px;
  pointer-events: none;
  z-index: 1;
  opacity: 0.4;
}
.circuit-svg { width: 100%; height: 100%; }

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  gap: 24px;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-light);
}
.logo-mark {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}
.logo-svg { width: 100%; height: 100%; }
.logo-ring {
  transform-origin: 50px 50px;
  animation: rotate 20s linear infinite;
}
@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-acronym {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.logo-tagline {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted-dark);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 3px;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}
.main-nav a {
  color: var(--text-muted-dark);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.main-nav a:not(.nav-cta):hover { color: var(--text-light); }
.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  height: 2px; width: 0;
  background: var(--blue-400);
  transition: width 0.3s ease;
}
.main-nav a:not(.nav-cta):hover::after { width: 100%; }

.nav-cta {
  padding: 9px 20px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: white !important;
  border-radius: 100px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.burger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.burger span {
  display: block; width: 24px; height: 2px;
  background: white; transition: 0.3s;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-2) 100%);
  color: var(--text-light);
  padding: 80px 0 0;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 2;
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(96, 165, 250, 0.1);
  border: 1px solid var(--border-dark);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue-300);
  margin-bottom: 28px;
  animation: fadeUp 0.8s 0.1s backwards;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  background: #22c55e; border-radius: 50%;
  box-shadow: 0 0 10px #22c55e;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.1); }
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  animation: fadeUp 0.8s 0.2s backwards;
}
.accent {
  background: linear-gradient(135deg, #60a5fa, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.accent-outline {
  -webkit-text-stroke: 2px #60a5fa;
  color: transparent;
  font-style: italic;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted-dark);
  max-width: 560px;
  margin-bottom: 36px;
  animation: fadeUp 0.8s 0.3s backwards;
}
.hero-subtitle strong { color: var(--text-light); font-weight: 600; }

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
  animation: fadeUp 0.8s 0.4s backwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  color: white;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(59, 130, 246, 0.5);
}
.btn-ghost {
  background: transparent;
  color: white;
  border: 1px solid var(--border-dark);
}
.btn-ghost:hover {
  background: rgba(96, 165, 250, 0.1);
  border-color: var(--blue-400);
}
.btn-full { width: 100%; justify-content: center; padding: 18px; }

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.5s backwards;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: var(--font-mono);
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted-dark);
  line-height: 1.4;
}

/* Visual droite - logo grand format */
.hero-visual {
  display: flex;
  justify-content: center;
  animation: fadeIn 1.2s 0.4s backwards;
}
.logo-hero {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  position: relative;
}
.logo-hero-svg {
  width: 100%; height: 100%;
  filter: drop-shadow(0 0 40px rgba(96, 165, 250, 0.3));
}
.ring-outer { transform-origin: 200px 200px; animation: rotate 30s linear infinite; }
.ring-mid { transform-origin: 200px 200px; animation: rotate 20s linear infinite reverse; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Les "O" stylisés dans le hero */
.o-word {
  font-weight: 800;
  font-size: 1.15em;
  background: linear-gradient(135deg, #60a5fa, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  display: inline-block;
  transform: translateY(1px);
}

/* Bandeau marques */
.brands-strip {
  border-top: 1px solid var(--border-dark);
  padding: 28px 0;
  position: relative;
  z-index: 2;
}
.brands-strip .container {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  justify-content: center;
}
.brands-block {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}
.brands-divider {
  width: 1px;
  height: 32px;
  background: var(--border-dark);
}
.brands-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted-dark);
  white-space: nowrap;
}
.brands-list {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--blue-300);
  opacity: 0.85;
  transition: opacity 0.2s;
}
.brand:hover { opacity: 1; }
.brand-sep { color: var(--text-muted-dark); opacity: 0.4; }

/* ============================================
   SECTIONS COMMUNES
   ============================================ */
.section-head {
  max-width: 720px;
  margin-bottom: 64px;
}
.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue-600);
  margin-bottom: 16px;
  padding: 6px 12px;
  background: var(--blue-100);
  border-radius: 100px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.text-muted { color: var(--text-muted); font-weight: 600; }
.section-intro {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 620px;
}

/* ============================================
   SERVICES
   ============================================ */
.services {
  padding: 120px 0;
  background: var(--bg-light);
  position: relative;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue-400), var(--blue-700));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--blue-300);
  box-shadow: 0 20px 40px -20px rgba(59, 130, 246, 0.25);
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--blue-100), #fff);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--blue-600);
  border: 1px solid var(--border);
}
.service-icon svg { width: 28px; height: 28px; }
.service-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.service-card p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 15px;
}
.service-list {
  list-style: none;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}
.service-list li {
  font-size: 14px;
  color: var(--text-dark);
  padding: 6px 0 6px 20px;
  position: relative;
}
.service-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--blue-500);
  font-weight: bold;
}

/* ============================================
   EXPERTISE
   ============================================ */
.expertise {
  padding: 120px 0;
  background: linear-gradient(180deg, var(--bg-light) 0%, #eff4fb 100%);
  position: relative;
  overflow: hidden;
}
.expertise::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1), transparent 70%);
  pointer-events: none;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}
.expertise-card {
  background: var(--bg-card);
  padding: 40px 32px;
  transition: background 0.3s;
  position: relative;
}
.expertise-card:hover {
  background: linear-gradient(135deg, #fff, #f0f7ff);
}
.expertise-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--blue-500);
  margin-bottom: 20px;
  letter-spacing: 2px;
}
.expertise-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.expertise-card p {
  color: var(--text-muted);
  font-size: 15px;
}

/* ============================================
   ABOUT
   ============================================ */
.about {
  padding: 120px 0;
  background: var(--bg-dark);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}
.about::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.15), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(96, 165, 250, 0.1), transparent 40%);
  pointer-events: none;
}
.about-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.about .section-title { color: var(--text-light); }
.about .section-title .text-muted { color: var(--text-muted-dark); }
.about .section-tag {
  color: var(--blue-300);
  background: rgba(96, 165, 250, 0.1);
  border: 1px solid var(--border-dark);
}
.about-lead {
  font-size: 18px;
  color: #cbd5e1;
  margin-bottom: 20px;
}
.about-lead strong { color: white; }
.about-text p {
  color: var(--text-muted-dark);
  margin-bottom: 32px;
}

.about-points {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.about-point {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.check {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 14px;
  flex-shrink: 0;
}
.about-point strong { display: block; color: white; margin-bottom: 2px; }
.about-point span {
  font-size: 14px;
  color: var(--text-muted-dark);
}

/* Carte profil */
.about-card {
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.4), rgba(15, 23, 42, 0.6));
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}
.about-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-400), transparent);
}
.about-card-header {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-dark);
}
.about-avatar {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--blue-400), var(--blue-900));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 22px;
  color: white;
  letter-spacing: 1px;
}
.about-card-header h3 {
  font-size: 20px;
  color: white;
  margin-bottom: 2px;
}
.about-card-header p {
  font-size: 13px;
  color: var(--text-muted-dark);
  margin: 0;
}

.about-card-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}
.about-card-stats li {
  font-size: 13px;
  color: var(--text-muted-dark);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.about-card-stats li span {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--blue-300);
}

.about-card-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 24px;
  border-top: 1px solid var(--border-dark);
}
.about-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted-dark);
  font-size: 14px;
  transition: color 0.2s;
}
.about-contact:hover { color: var(--blue-300); }

/* ============================================
   CONTACT
   ============================================ */
.contact {
  padding: 120px 0;
  background: var(--bg-light);
  position: relative;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 20px 60px -30px rgba(15, 23, 42, 0.15);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-field {
  display: block;
  margin-bottom: 20px;
}
.form-row .form-field { margin-bottom: 0; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 15px;
  background: #fafbfc;
  transition: all 0.2s;
  color: var(--text-dark);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #94a3b8;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  background: white;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}
.contact-form textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
}
.form-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
  text-align: center;
}
.form-success {
  margin-top: 20px;
  padding: 16px 20px;
  background: linear-gradient(135deg, #dcfce7, #bbf7d0);
  border: 1px solid #86efac;
  border-radius: 10px;
  color: #166534;
  text-align: center;
  animation: fadeUp 0.4s;
}
.form-success strong { display: block; font-size: 16px; margin-bottom: 4px; }
.form-success span { font-size: 14px; }

/* Info contact */
.contact-info {
  background: var(--bg-dark);
  color: var(--text-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  overflow: hidden;
}
.contact-info::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.15), transparent 70%);
  pointer-events: none;
}
.contact-info h3 {
  font-size: 22px;
  margin-bottom: 8px;
  position: relative;
}
.contact-info-lead {
  font-size: 14px;
  color: var(--text-muted-dark);
  margin-bottom: 28px;
  position: relative;
}
.contact-info-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--border-dark);
  color: var(--text-light);
  transition: transform 0.2s;
  position: relative;
}
.contact-info-item:hover:not(.contact-info-item--static) {
  transform: translateX(4px);
}
.contact-info-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(96, 165, 250, 0.15);
  border: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-300);
  flex-shrink: 0;
}
.contact-info-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted-dark);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 2px;
}
.contact-info-item strong {
  font-size: 15px;
  font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--bg-dark-2);
  color: var(--text-light);
  padding: 64px 0 24px;
  border-top: 1px solid var(--border-dark);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand {
  display: flex;
  gap: 14px;
  align-items: center;
}
.footer-logo { width: 48px; height: 48px; flex-shrink: 0; }
.footer-brand strong {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted-dark);
}
.footer-nav h4, .footer-contact h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--blue-300);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-nav ul { list-style: none; }
.footer-nav li { margin-bottom: 8px; }
.footer-nav a {
  color: var(--text-muted-dark);
  font-size: 14px;
  transition: color 0.2s;
}
.footer-nav a:hover { color: white; }
.footer-contact p {
  font-size: 14px;
  color: var(--text-muted-dark);
  margin-bottom: 12px;
}
.footer-contact a {
  color: var(--text-muted-dark);
  transition: color 0.2s;
}
.footer-contact a:hover { color: white; }
.footer-area {
  font-size: 13px;
  line-height: 1.6;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-dark);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted-dark);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-legal a:hover { color: white; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; padding-bottom: 48px; }
  .hero-visual { order: -1; max-width: 320px; margin: 0 auto; }
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: block;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg-dark-2);
    border-bottom: 1px solid var(--border-dark);
    padding: 20px 24px;
  }
  .main-nav.open ul {
    flex-direction: column;
    gap: 16px;
    align-items: stretch;
  }
  .burger { display: flex; }
  .header-inner { padding: 14px 20px; }

  .hero { padding: 48px 0 0; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 28px; }

  .services, .expertise, .about, .contact { padding: 72px 0; }
  .section-head { margin-bottom: 48px; }

  .form-row { grid-template-columns: 1fr; gap: 0; }
  .form-row .form-field { margin-bottom: 20px; }
  .contact-form { padding: 28px 24px; }
  .contact-info { padding: 28px 24px; }

  .about-card-stats { grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
  .brands-list { gap: 16px; }
  .brand { font-size: 12px; letter-spacing: 2px; }
  .logo-acronym { font-size: 20px; }
  .logo-tagline { display: none; }
}

/* ============================================
   NOUVEAU LOGO OIT SOLUTIONS — Images + Animations
   ============================================ */

/* === Logo HEADER === */
.logo-img-header {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(96, 165, 250, 0.4));
  transition: transform 0.3s ease, filter 0.3s ease;
}
.logo-link:hover .logo-img-header {
  transform: scale(1.08);
  filter: drop-shadow(0 0 14px rgba(96, 165, 250, 0.7));
}

.site-header .logo-mark {
  width: 44px;
  height: 44px;
}

/* === Logo HERO (logo immobile + surbrillance + 3 particules) === */
.logo-hero-wrap {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-hero-wrap .highlight {
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(96, 165, 250, 0.25) 0%,
    rgba(59, 130, 246, 0.12) 40%,
    transparent 70%);
  filter: blur(50px);
  z-index: 0;
}

.logo-hero-wrap .particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.logo-hero-wrap .particle {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform-origin: 0 0;
}

.logo-hero-wrap .particle.p1 {
  width: 7px;
  height: 7px;
  background: #60a5fa;
  box-shadow: 0 0 15px #60a5fa, 0 0 25px rgba(96, 165, 250, 0.6);
  animation: orbit-1 18s linear infinite;
}
.logo-hero-wrap .particle.p2 {
  width: 6px;
  height: 6px;
  background: #fbbf24;
  box-shadow: 0 0 16px rgba(251, 191, 36, 0.9), 0 0 28px rgba(251, 191, 36, 0.4);
  animation: orbit-2 22s linear infinite;
  animation-delay: -8s;
}
.logo-hero-wrap .particle.p3 {
  width: 5px;
  height: 5px;
  background: #38bdf8;
  box-shadow: 0 0 12px #38bdf8, 0 0 20px rgba(56, 189, 248, 0.5);
  animation: orbit-3 26s linear infinite;
  animation-delay: -14s;
}

@keyframes orbit-1 {
  from { transform: rotate(0deg) translateX(240px) rotate(0deg); }
  to   { transform: rotate(360deg) translateX(240px) rotate(-360deg); }
}
@keyframes orbit-2 {
  from { transform: rotate(0deg) translateX(260px) rotate(0deg); }
  to   { transform: rotate(-360deg) translateX(260px) rotate(360deg); }
}
@keyframes orbit-3 {
  from { transform: rotate(0deg) translateX(220px) rotate(0deg); }
  to   { transform: rotate(360deg) translateX(220px) rotate(-360deg); }
}

.logo-hero-wrap .logo-container {
  position: relative;
  width: 75%;
  height: 75%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
}

.logo-hero-wrap .logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter:
    drop-shadow(0 0 25px rgba(96, 165, 250, 0.4))
    drop-shadow(0 0 50px rgba(96, 165, 250, 0.2));
}

/* === Logo FOOTER === */
.logo-img-footer {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0 10px rgba(96, 165, 250, 0.3));
  transition: transform 0.3s ease, filter 0.3s ease;
}
.footer-brand:hover .logo-img-footer {
  transform: scale(1.05);
  filter: drop-shadow(0 0 15px rgba(96, 165, 250, 0.5));
}

.site-footer .footer-logo {
  width: 56px;
  height: 56px;
}

/* Responsive mobile — orbites plus compactes */
@media (max-width: 720px) {
  @keyframes orbit-1 {
    from { transform: rotate(0deg) translateX(160px) rotate(0deg); }
    to   { transform: rotate(360deg) translateX(160px) rotate(-360deg); }
  }
  @keyframes orbit-2 {
    from { transform: rotate(0deg) translateX(175px) rotate(0deg); }
    to   { transform: rotate(-360deg) translateX(175px) rotate(360deg); }
  }
  @keyframes orbit-3 {
    from { transform: rotate(0deg) translateX(145px) rotate(0deg); }
    to   { transform: rotate(360deg) translateX(145px) rotate(-360deg); }
  }
}

/* Accessibilité - reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .logo-ring, .ring-outer, .ring-mid,
  .logo-hero-wrap .particle { animation: none; }
}