:root {
  --blue-900: #0c2d52;
  --blue-700: #14538c;
  --blue-600: #1a6bb5;
  --blue-500: #2380d6;
  --blue-100: #e8f1fb;
  --gray-900: #1b2330;
  --gray-600: #5b6472;
  --gray-300: #d8dee5;
  --gray-100: #f4f6f9;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(12, 45, 82, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.6;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { font-weight: 700; margin: 0; line-height: 1.2; }

a { text-decoration: none; color: inherit; }

ul { padding: 0; margin: 0; list-style: none; }

/* Topbar */
.topbar {
  background: var(--blue-900);
  color: var(--blue-100);
  font-size: 0.85rem;
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.topbar a { color: var(--white); font-weight: 600; }
.topbar a:hover { text-decoration: underline; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-300);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--blue-900);
  letter-spacing: -0.02em;
}

.logo span { color: var(--blue-500); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--gray-900);
  transition: color 0.2s;
}

.main-nav a:hover { color: var(--blue-600); }

.nav-cta {
  background: var(--blue-600);
  color: var(--white) !important;
  padding: 9px 18px;
  border-radius: var(--radius);
}

.nav-cta:hover { background: var(--blue-700); color: var(--white) !important; }

.active-link { color: var(--blue-600); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--gray-900);
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--blue-900) 0%, var(--blue-700) 55%, var(--blue-600) 100%);
  color: var(--white);
  padding: 110px 0 100px;
}

.hero-inner { max-width: 720px; }

.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--blue-100);
  margin: 0 0 16px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin-bottom: 18px;
}

.hero-sub {
  font-size: 1.15rem;
  color: #d7e6f7;
  margin: 0 0 32px;
  max-width: 560px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  border: 2px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--white);
  color: var(--blue-700);
}

.btn-primary:hover { background: var(--blue-100); }

.hero .btn-primary { background: var(--white); color: var(--blue-700); }

.btn-ghost {
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}

.btn-ghost:hover { border-color: var(--white); background: rgba(255,255,255,0.08); }

/* Hero duo */
.hero-duo {
  display: flex;
  gap: 18px;
  margin-top: 44px;
  flex-wrap: wrap;
}

.hero-duo-card {
  flex: 1;
  min-width: 220px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.hero-duo-card svg { width: 30px; height: 30px; flex-shrink: 0; }

.hero-duo-card span { font-size: 0.95rem; font-weight: 600; color: var(--white); }

/* Page hero (sub-pages) */
.page-hero {
  background: linear-gradient(160deg, var(--blue-900) 0%, var(--blue-700) 55%, var(--blue-600) 100%);
  color: var(--white);
  padding: 80px 0 64px;
  text-align: center;
}

.page-hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 14px; }
.page-hero p { color: #d7e6f7; max-width: 640px; margin: 0 auto; font-size: 1.05rem; }

/* Section titles */
.section-title {
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  color: var(--blue-900);
  text-align: center;
  margin-bottom: 12px;
}

.section-sub {
  text-align: center;
  color: var(--gray-600);
  max-width: 560px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}

/* Services */
.services { padding: 90px 0; background: var(--white); }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--gray-300);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--blue-500);
}

.icon-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--blue-100);
  color: var(--blue-600);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.icon-circle svg { width: 26px; height: 26px; }

.card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--gray-900); }

.card p { margin: 0; color: var(--gray-600); font-size: 0.95rem; }

.card-link {
  display: inline-block;
  margin-top: 14px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--blue-600);
}

.card-link:hover { text-decoration: underline; }

/* Expertise */
.expertise { background: var(--gray-100); padding: 90px 0; }

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.expertise-block {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  border-top: 3px solid var(--blue-500);
  box-shadow: var(--shadow);
}

.expertise-block h3 { color: var(--blue-900); margin-bottom: 12px; font-size: 1.15rem; }

.expertise-block p { margin: 0; color: var(--gray-600); }

/* Stats */
.stats { background: var(--blue-900); color: var(--white); padding: 56px 0; }

.stats-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: center;
  gap: 24px;
}

.stat-num {
  display: block;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--white);
}

.stat-label {
  display: block;
  color: var(--blue-100);
  font-size: 0.9rem;
  margin-top: 6px;
}

/* A propos */
.apropos { padding: 90px 0; }

.apropos-inner { max-width: 760px; margin: 0 auto; text-align: center; }

.apropos-inner p { color: var(--gray-600); font-size: 1.05rem; }

/* Materiel */
.materiel { background: var(--gray-100); padding: 90px 0; }

.materiel-inner { max-width: 640px; margin: 0 auto; text-align: center; }

.materiel .section-title, .materiel .section-sub { text-align: center; }

.brand-list {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin: 0 0 36px;
  flex-wrap: wrap;
}

.brand-list li {
  font-weight: 700;
  color: var(--blue-700);
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

/* Contact */
.contact { padding: 90px 0; background: var(--gray-100); }

.contact-centered { max-width: 640px; margin: 0 auto; text-align: center; }

.info-list-centered {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  text-align: left;
  margin-top: 12px;
}

.info-list strong {
  display: block;
  color: var(--blue-900);
  margin-bottom: 4px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.info-list a { color: var(--blue-600); font-weight: 600; }
.info-list a:hover { text-decoration: underline; }

/* Logos grid */
.logos-section { padding: 70px 0; background: var(--white); }

.logos-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 48px;
}

.logos-grid img {
  max-height: 56px;
  max-width: 180px;
  object-fit: contain;
  filter: grayscale(15%);
  opacity: 0.9;
  transition: opacity 0.2s, filter 0.2s;
}

.logos-grid img:hover { filter: grayscale(0%); opacity: 1; }

.logo-name {
  font-weight: 700;
  color: var(--blue-700);
  font-size: 1.05rem;
}

/* Testimonials */
.testimonials { padding: 90px 0; background: var(--gray-100); }

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.testimonial {
  background: var(--white);
  border-left: 4px solid var(--blue-500);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-style: italic;
  color: var(--gray-900);
  margin: 0 0 16px;
  flex-grow: 1;
}

.testimonial-author {
  font-weight: 700;
  color: var(--blue-900);
  font-size: 0.95rem;
}

.testimonial-role {
  display: block;
  font-weight: 400;
  color: var(--gray-600);
  font-size: 0.88rem;
  margin-top: 2px;
}

.realisations-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.realisations-tags li {
  background: var(--blue-100);
  color: var(--blue-700);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 20px;
}

/* Timeline */
.timeline { display: flex; flex-direction: column; }

.timeline-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--gray-300);
}

.timeline-item:last-child { border-bottom: none; }

.timeline-year {
  font-weight: 800;
  color: var(--blue-600);
  font-size: 1.15rem;
}

.timeline-item h3 { font-size: 1.05rem; color: var(--gray-900); margin-bottom: 6px; }
.timeline-item p { margin: 0; color: var(--gray-600); }

/* Values */
.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.value-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  border-top: 3px solid var(--blue-500);
  box-shadow: var(--shadow);
}

.value-card h3 { color: var(--blue-900); margin-bottom: 12px; font-size: 1.1rem; }
.value-card p { margin: 0; color: var(--gray-600); }

/* Tech tags */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.tech-tags li {
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  color: var(--blue-700);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 9px 18px;
  border-radius: 20px;
}

/* Project checklist (contact) */
.project-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  text-align: left;
  margin: 32px 0;
}

.project-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--gray-600);
  font-size: 0.95rem;
}

.project-list li svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--blue-600);
  margin-top: 2px;
}

/* Footer */
.site-footer {
  background: var(--blue-900);
  color: var(--blue-100);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.site-footer .logo { color: var(--white); }
.site-footer .logo span { color: var(--blue-500); }

.footer-inner p { margin: 6px 0 0; font-size: 0.9rem; color: var(--blue-100); }

.footer-nav { display: flex; gap: 24px; }
.footer-nav a { font-size: 0.9rem; color: var(--blue-100); }
.footer-nav a:hover { color: var(--white); }

.copyright { font-size: 0.85rem; margin: 0; color: var(--blue-100); width: 100%; text-align: center; }

/* Responsive */
@media (max-width: 900px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .expertise-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .info-list-centered { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .project-list { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 18px;
    border-bottom: 1px solid var(--gray-300);
    box-shadow: var(--shadow);
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .cards-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .hero { padding: 90px 0 70px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .hero-duo { flex-direction: column; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; }
  .topbar-inner { justify-content: center; text-align: center; }
}