/* ============================================================
   ONYX TECHNOLOGIES — www.onyxtechno.com
   Design system aligned with Onyx MSB brand book
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;500;600;700;800&family=Lato:wght@300;400;700;900&display=swap');

/* --- CSS Variables --- */
:root {
  --brand:        #e51b23;
  --brand-dark:   #b81219;
  --brand-light:  #ff3a42;
  --brand-tint:   #fde8e9;
  --brand-tint2:  #fef3f3;

  --dark-4: #313131;
  --dark-3: #616161;
  --dark-2: #919191;
  --dark-1: #c4c4c4;

  --light-3: #e5e5ea;
  --light-2: #ebebf0;
  --light-1: #F5F5F7;
  --white:   #ffffff;

  --success:       #16a34a;
  --success-light: #dcfce7;
  --info:          #2563eb;
  --info-light:    #eff6ff;

  --font-display: 'Barlow', sans-serif;
  --font-body:    'Lato', sans-serif;

  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  20px;
  --radius-2xl: 24px;

  --shadow-xs: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.05);
  --shadow-md: 0 4px 16px rgba(0,0,0,.09), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.11), 0 4px 12px rgba(0,0,0,.07);
  --shadow-xl: 0 16px 48px rgba(0,0,0,.13), 0 8px 20px rgba(0,0,0,.08);

  --ease: cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(0,0,.2,1);

  --container: 1200px;
  --nav-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--dark-3);
  background: var(--white);
  overflow-x: hidden;
}

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark-4);
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select {
  font-family: var(--font-body);
  font-size: 1rem;
  outline: none;
}

/* --- Utility --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-tint);
  border: 1px solid rgba(229,27,35,.15);
  padding: 4px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--dark-4);
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1rem;
  color: var(--dark-3);
  max-width: 560px;
  line-height: 1.7;
}

.section-sub em { font-style: normal; color: var(--brand); font-weight: 700; }

.text-center { text-align: center; }
.text-center .section-sub { margin: 0 auto; }

/* animate-in fade-up */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up.delay-1 { transition-delay: .1s; }
.fade-up.delay-2 { transition-delay: .2s; }
.fade-up.delay-3 { transition-delay: .3s; }
.fade-up.delay-4 { transition-delay: .4s; }
.fade-up.delay-5 { transition-delay: .5s; }

/* ============================================================
   NAVIGATION
   ============================================================ */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--light-3);
  transition: box-shadow .3s var(--ease);
}

#header.scrolled { box-shadow: var(--shadow-md); }

#header .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

#logo a {
  display: flex;
  align-items: center;
}

#logo img { height: 32px; width: auto; }

#nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

#nav-menu a {
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 600;
  color: var(--dark-3);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: color .2s var(--ease), background .2s var(--ease);
}

#nav-menu a:hover,
#nav-menu a.active {
  color: var(--dark-4);
  background: var(--light-1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.btn-nav-cta {
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 700;
  color: var(--white);
  background: var(--brand);
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  transition: background .2s var(--ease), transform .15s var(--ease);
}

.btn-nav-cta:hover { background: var(--brand-dark); transform: translateY(-1px); }

.btn-nav-secondary {
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 600;
  color: var(--dark-3);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--light-3);
  transition: all .2s var(--ease);
}

.btn-nav-secondary:hover { color: var(--dark-4); border-color: var(--dark-2); }

/* Mobile menu */
#mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
  border-radius: var(--radius-sm);
  transition: background .2s;
}

#mobile-toggle:hover { background: var(--light-1); }

#mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark-4);
  border-radius: 2px;
  transition: all .3s var(--ease);
}

#mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--light-3);
  padding: 16px 24px 24px;
  box-shadow: var(--shadow-md);
  z-index: 999;
}

#mobile-nav.open { display: block; }

#mobile-nav a {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark-3);
  padding: 12px 0;
  border-bottom: 1px solid var(--light-2);
  transition: color .2s;
}

#mobile-nav a:hover { color: var(--brand); }
#mobile-nav a:last-child { border-bottom: none; }

.mobile-cta {
  margin-top: 16px;
  display: block;
  text-align: center;
  background: var(--brand);
  color: var(--white) !important;
  border-radius: var(--radius-sm);
  padding: 12px !important;
  border: none !important;
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
  background: var(--white);
}

.hero-dot-grid {
  position: absolute;
  inset: 0;
  opacity: .035;
  background-image: radial-gradient(circle, var(--dark-4) 1.5px, transparent 1.5px);
  background-size: 22px 22px;
  pointer-events: none;
}

.hero-accent {
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--brand), transparent 70%);
}

.hero-gradient {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 300px;
  background: linear-gradient(to top, var(--brand-tint2), transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 0;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-eyebrow-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--brand);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(1.3); }
}

.hero-eyebrow-text {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--brand);
}

.hero-title {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  font-weight: 800;
  color: var(--dark-4);
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-title .accent { color: var(--brand); }

.hero-desc {
  font-size: 1.0625rem;
  color: var(--dark-3);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: .9375rem;
  font-weight: 700;
  color: var(--white);
  background: var(--brand);
  padding: 13px 28px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px rgba(229,27,35,.3);
  transition: background .2s var(--ease), transform .15s var(--ease), box-shadow .2s var(--ease);
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(229,27,35,.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: .9375rem;
  font-weight: 600;
  color: var(--dark-4);
  background: var(--white);
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--light-3);
  transition: all .2s var(--ease);
}

.btn-secondary:hover {
  border-color: var(--dark-2);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 600;
  color: var(--dark-3);
  background: var(--light-1);
  border: 1px solid var(--light-3);
  padding: 6px 14px;
  border-radius: 100px;
}

.trust-pill svg { color: var(--brand); flex-shrink: 0; }

/* Hero visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: var(--white);
  border: 1px solid var(--light-3);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  padding: 28px;
  width: 100%;
  max-width: 360px;
  position: relative;
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.hero-card-label {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--dark-2);
}

.hero-card-badge {
  font-family: var(--font-display);
  font-size: .7rem;
  font-weight: 700;
  color: var(--success);
  background: var(--success-light);
  padding: 3px 10px;
  border-radius: 100px;
}

.hero-card-logo {
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 800;
  color: var(--dark-4);
  letter-spacing: -.01em;
}

.hero-card-logo span { color: var(--brand); }

.hero-card-pillar {
  background: var(--light-1);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--light-3);
}

.pillar-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: var(--brand-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pillar-icon svg { color: var(--brand); }

.pillar-name {
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 700;
  color: var(--dark-4);
  margin-bottom: 2px;
}

.pillar-desc {
  font-size: .75rem;
  color: var(--dark-2);
}

.hero-card-divider {
  height: 1px;
  background: var(--light-3);
  margin: 16px 0;
}

.hero-card-clients {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-card-clients-text {
  font-size: .8rem;
  color: var(--dark-2);
}

.hero-card-clients-text strong {
  font-family: var(--font-display);
  color: var(--dark-4);
  font-weight: 700;
}

.hero-card-dots {
  display: flex;
  gap: -6px;
}

.client-dot {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--light-2);
  border: 2px solid var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .6rem;
  font-weight: 800;
  font-family: var(--font-display);
  color: var(--dark-3);
  margin-left: -8px;
}

.client-dot:first-child { margin-left: 0; background: var(--brand-tint); color: var(--brand); }

/* Floating badges */
.hero-badge {
  position: absolute;
  background: var(--white);
  border: 1px solid var(--light-3);
  border-radius: var(--radius-lg);
  padding: 10px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-badge-1 {
  top: -16px; right: -16px;
}

.hero-badge-2 {
  bottom: -16px; left: -16px;
}

.hero-badge-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: var(--brand-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.hero-badge-num {
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 800;
  color: var(--dark-4);
  line-height: 1;
}

.hero-badge-label {
  font-size: .7rem;
  color: var(--dark-2);
}

/* ============================================================
   STATS BAR
   ============================================================ */
#stats {
  background: var(--dark-4);
  padding: 48px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,.1);
}

.stat-item {
  background: var(--dark-4);
  padding: 32px 24px;
  text-align: center;
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 6px;
}

.stat-num .brand { color: var(--brand); }

.stat-label {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  font-weight: 400;
}

/* ============================================================
   ABOUT
   ============================================================ */
#about {
  padding: 100px 0;
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-pillar {
  display: flex;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--light-3);
  background: var(--white);
  margin-top: 20px;
  transition: box-shadow .25s var(--ease), transform .25s var(--ease);
}

.about-pillar:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.about-pillar-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--brand-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.about-pillar-icon svg { color: var(--brand); }

.about-pillar h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark-4);
  margin-bottom: 4px;
}

.about-pillar p {
  font-size: .9rem;
  color: var(--dark-3);
  line-height: 1.6;
}

/* About visual */
.about-visual {
  position: relative;
}

.about-card {
  background: var(--white);
  border: 1px solid var(--light-3);
  border-radius: var(--radius-2xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--brand);
  border-radius: 3px 0 0 3px;
}

.about-card-dots {
  position: absolute;
  inset: 0;
  opacity: .035;
  background-image: radial-gradient(circle, var(--dark-4) 1.5px, transparent 1.5px);
  background-size: 20px 20px;
  pointer-events: none;
}

.about-stat {
  text-align: center;
  padding: 20px;
}

.about-stat-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--dark-4);
  line-height: 1;
  margin-bottom: 6px;
}

.about-stat-num .accent { color: var(--brand); }

.about-stat-label {
  font-size: .875rem;
  color: var(--dark-3);
}

.about-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--light-3);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--light-3);
  margin-top: 24px;
}

.about-stats-grid .about-stat {
  background: var(--white);
}

.about-quote {
  margin-top: 24px;
  padding: 20px;
  background: var(--brand-tint);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--brand);
}

.about-quote p {
  font-size: .9rem;
  color: var(--dark-4);
  font-style: italic;
  line-height: 1.6;
}

.about-quote cite {
  display: block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  color: var(--brand);
  font-style: normal;
}

/* ============================================================
   SERVICES
   ============================================================ */
#services {
  padding: 100px 0;
  background: var(--light-1);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 28px;
  border: 1px solid var(--light-3);
  transition: box-shadow .25s var(--ease), transform .25s var(--ease), border-color .25s var(--ease);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: transparent;
}

.service-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: var(--brand-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.service-card-icon svg { color: var(--brand); }

.service-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark-4);
  margin-bottom: 8px;
  line-height: 1.3;
}

.service-card p {
  font-size: .9rem;
  color: var(--dark-3);
  line-height: 1.65;
}

/* ============================================================
   PRODUCTS / SOLUTIONS
   ============================================================ */
#solutions {
  padding: 100px 0;
  background: var(--white);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.solution-card {
  background: var(--white);
  border: 1px solid var(--light-3);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: box-shadow .25s var(--ease), transform .25s var(--ease);
  position: relative;
  overflow: hidden;
}

.solution-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}

.solution-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.solution-card:hover::after {
  transform: scaleX(1);
}

.solution-logo {
  width: 72px; height: 72px;
  border-radius: var(--radius-lg);
  background: var(--light-1);
  border: 1px solid var(--light-3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  padding: 8px;
}

.solution-logo img { width: 100%; height: 100%; object-fit: contain; }

.solution-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dark-4);
  margin-bottom: 6px;
}

.solution-body p {
  font-size: .9rem;
  color: var(--dark-3);
  line-height: 1.65;
}

.solution-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-display);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-tint);
  padding: 3px 10px;
  border-radius: 100px;
  margin-top: 10px;
}

/* ============================================================
   CALL TO ACTION
   ============================================================ */
#cta {
  padding: 80px 0;
  background: var(--dark-4);
  position: relative;
  overflow: hidden;
}

.cta-dots {
  position: absolute;
  inset: 0;
  opacity: .06;
  background-image: radial-gradient(circle, var(--white) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  pointer-events: none;
}

.cta-accent {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--brand);
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}

.cta-inner .section-badge {
  background: rgba(229,27,35,.15);
  border-color: rgba(229,27,35,.3);
}

.cta-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}

.cta-text {
  font-size: .9375rem;
  color: rgba(255,255,255,.65);
  max-width: 540px;
  line-height: 1.75;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark-4);
  background: var(--white);
  padding: 15px 32px;
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: all .2s var(--ease);
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
}

.btn-cta:hover {
  background: var(--brand-tint);
  color: var(--brand);
  transform: translateY(-2px);
}

/* ============================================================
   RÉFÉRENCES
   ============================================================ */
#references {
  padding: 100px 0;
  background: var(--light-1);
}

.ref-tabs {
  display: flex;
  gap: 6px;
  margin: 32px 0 40px;
  flex-wrap: wrap;
}

.ref-tab {
  font-family: var(--font-display);
  font-size: .8125rem;
  font-weight: 700;
  color: var(--dark-3);
  padding: 7px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--light-3);
  background: var(--white);
  cursor: pointer;
  transition: all .2s var(--ease);
}

.ref-tab:hover { border-color: var(--brand); color: var(--brand); }
.ref-tab.active { background: var(--brand); color: var(--white); border-color: var(--brand); }

.ref-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.ref-card {
  background: var(--white);
  border: 1px solid var(--light-3);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  transition: box-shadow .25s var(--ease), transform .25s var(--ease);
  cursor: default;
}

.ref-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.ref-card[data-filter="project"] { --accent: var(--info); --accent-bg: var(--info-light); }
.ref-card[data-filter="client"] { --accent: var(--success); --accent-bg: var(--success-light); }

.ref-logo {
  height: 56px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ref-logo img {
  max-height: 100%;
  max-width: 140px;
  object-fit: contain;
  filter: grayscale(1) opacity(.7);
  transition: filter .25s var(--ease);
}

.ref-card:hover .ref-logo img {
  filter: grayscale(0) opacity(1);
}

.ref-name {
  font-family: var(--font-display);
  font-size: .8125rem;
  font-weight: 700;
  color: var(--dark-4);
}

.ref-desc {
  font-size: .75rem;
  color: var(--dark-2);
  line-height: 1.5;
}

.ref-badge {
  font-family: var(--font-display);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
}

.ref-badge.projet { background: var(--info-light); color: var(--info); }
.ref-badge.reference { background: var(--success-light); color: var(--success); }

.ref-card.hidden { display: none; }

/* ============================================================
   CONTACT
   ============================================================ */
#contact {
  padding: 100px 0 0;
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-4);
  margin-bottom: 6px;
}

.contact-info p {
  font-size: .9rem;
  color: var(--dark-3);
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.contact-item-icon {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--brand-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg { color: var(--brand); }

.contact-item-label {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--dark-2);
  margin-bottom: 3px;
}

.contact-item-value {
  font-size: .9rem;
  color: var(--dark-4);
  line-height: 1.5;
}

.social-links {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}

.social-link {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  background: var(--light-1);
  border: 1px solid var(--light-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-3);
  transition: all .2s var(--ease);
}

.social-link:hover {
  background: var(--brand);
  color: var(--white);
  border-color: var(--brand);
  transform: translateY(-2px);
}

/* Contact form */
.contact-form-card {
  background: var(--white);
  border: 1px solid var(--light-3);
  border-radius: var(--radius-2xl);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 700;
  color: var(--dark-4);
  letter-spacing: .01em;
}

.form-control {
  padding: 11px 14px;
  border: 1.5px solid var(--light-3);
  border-radius: var(--radius-md);
  background: var(--light-1);
  color: var(--dark-4);
  font-size: .9rem;
  transition: border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}

.form-control:focus {
  border-color: var(--brand);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(229,27,35,.1);
}

.form-control::placeholder { color: var(--dark-1); }

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  width: 100%;
  padding: 13px;
  background: var(--brand);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background .2s var(--ease), transform .15s var(--ease), box-shadow .2s var(--ease);
  box-shadow: 0 4px 14px rgba(229,27,35,.3);
}

.form-submit:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(229,27,35,.35);
}

.form-msg {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: .875rem;
  margin-top: 12px;
}

.form-msg.success { background: var(--success-light); color: var(--success); display: block; }
.form-msg.error { background: #fef2f2; color: var(--brand); display: block; }

/* Map */
#map {
  margin-top: 64px;
}

#map iframe {
  width: 100%;
  height: 360px;
  display: block;
  filter: grayscale(.8) contrast(1.1);
  transition: filter .3s;
}

#map:hover iframe { filter: grayscale(.3) contrast(1.1); }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--dark-4);
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,.08);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo img { height: 28px; filter: brightness(0) invert(1); }

.footer-logo-text {
  font-family: var(--font-display);
  font-size: .8rem;
  color: rgba(255,255,255,.4);
}

.footer-copy {
  font-size: .8rem;
  color: rgba(255,255,255,.4);
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 600;
  color: rgba(255,255,255,.4);
  transition: color .2s;
}

.footer-links a:hover { color: var(--white); }

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 40px; height: 40px;
  background: var(--brand);
  color: var(--white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s, transform .3s var(--ease);
  transform: translateY(10px);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover { background: var(--brand-dark); transform: translateY(-2px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; padding: 60px 0; }
  .hero-visual { order: -1; }
  .hero-card { max-width: 420px; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .cta-inner { grid-template-columns: 1fr; gap: 32px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .ref-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  #nav-menu, .nav-actions { display: none; }
  #mobile-toggle { display: flex; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .ref-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .contact-form-card { padding: 24px; }
  .about-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .ref-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero-badge { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}