:root {
  --blue-fast: #2f80ed;
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --bg-main: #f6f8fc;
  --white: #ffffff;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Inter, sans-serif;
  background: linear-gradient(180deg, #f8faff 0%, #eef3fb 100%);
  color: var(--text-main);
}

/* =========================
   HEADER
========================= */
.header {
  padding: 20px 48px;
  position: relative; /* 🔑 ancrage du menu mobile */
}

.header-inner {
  max-width: 1200px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* LOGO */
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo img {
  width: 120px;
  height: 80px;
}

.brand {
  font-size: 22px;
  letter-spacing: 0.5px;
}

.brand strong {
  font-weight: 700;
  color: #000;
}

.brand span {
  color: var(--blue-fast);
  font-weight: 700;
}

/* =========================
   NAV DESKTOP
========================= */
.nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav a {
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
}

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

/* LANGUAGE SWITCH */
.lang-switch {
  margin-left: 24px;
  font-size: 13px;
}

.lang-switch a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}

.lang-switch a.active,
.lang-switch a:hover {
  color: var(--blue-fast);
  font-weight: 600;
}

/* =========================
   BURGER BUTTON
========================= */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: 24px;
}

.burger span {
  width: 22px;
  height: 2px;
  background: var(--text-main);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* =========================
   CONTAINER
========================= */
.container {
  max-width: 1200px;
  margin: auto;
  padding: 16px 32px 80px;
}

/* =========================
   HERO
========================= */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 64px;
  margin-top: 80px;
}

.hero-text h1 {
  font-size: 42px;
  line-height: 1.25;
  margin-bottom: 18px;
}

.subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.construction {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(47, 128, 237, 0.08);
  color: var(--blue-fast);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
}

.contact-inline {
  margin-top: 16px;
  font-size: 14px;
}

.contact-inline a {
  color: var(--blue-fast);
  text-decoration: none;
}

/* HERO SPHERE */
.hero-visual img {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  margin: 0 auto;
  filter: drop-shadow(0 12px 32px rgba(47, 128, 237, 0.25));
  animation: slow-rotate 160s linear infinite;
  transition: transform 0.4s ease;
}

.hero-visual img:hover {
  transform: scale(1.03);
}

/* =========================
   PROBLEM
========================= */
.problem {
  margin-top: 20px;
  margin-bottom: 140px /* ⬅️ crée un écran entier avant les cards */
}

.problem h2 {
  font-size: 28px;
  margin-bottom: 24px;
}

.problem ul {
  list-style: disc;
  padding-left: 20px;
  color: var(--text-muted);
}

/* =========================
   CARDS
========================= */
.cards {
  margin-top: 120px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

.card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 42px rgba(0,0,0,0.07);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.card-header img {
  width: 36px;
  height: 36px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  animation: slow-rotate 200s linear infinite;
}

.card h3 {
  font-size: 20px;
  color: var(--blue-fast);
}

.card ul {
  list-style: none;
  margin-top: 12px;
}

.card li {
  color: var(--text-muted);
  margin-bottom: 6px;
}

/* =========================
   MANIFEST
========================= */
.manifest{
 margin: 10px;
}

.manifest {
  text-align: center;
  font-size: 20px;
  padding: 48px 0;
}
.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.card-link * {
  text-decoration: none;
  color: inherit;
}
.card-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(47, 128, 237, 0.12);
  transition: all 0.2s ease;
}


/* =========================
   FOOTER
========================= */
.footer {
    margin-top: 10px;
}
.footer {
  text-align: center;
  padding: 40px;
  font-size: 13px;
  color: #828282;
}

/* =========================
   ANIMATION
========================= */
@keyframes slow-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* =========================
   MOBILE / BURGER (SAFE)
========================= */
@media (max-width: 900px) {

  /* Header reste horizontal */
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  /* Burger visible */
  .burger {
    display: flex;
  }

  /* Menu mobile en overlay (hors flux) */
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;

    display: none;
    flex-direction: column;
    align-items: center;
    gap: 20px;

    background: #ffffff;
    padding: 32px 0;

    z-index: 1000;
    box-shadow: 0 12px 30px rgba(0,0,0,0.08);
  }

  .nav.open {
    display: flex;
  }

  .lang-switch {
    margin-left: 0;
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    margin-bottom: 64px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual img {
    max-width: 260px;
  }

  .cards {
    grid-template-columns: 1fr;
    margin-top: 64px;
  }

  .contact-inline {
    margin-bottom: 24px;
  }
}
.fast-brand strong {
  color: var(--text-main); /* noir */
 
  font-weight: 700;
}

.fast-brand span {
   color: var(--blue-fast); /* bleu FAST */
  font-weight: 700;
}