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

/* ---------- GLOBAL ---------- */
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #020817; /* fond noir */
  color: #e5e7eb;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ---------- NAVIGATION ---------- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 18px 40px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 26px;
  z-index: 20;
  background: radial-gradient(circle at top, rgba(37, 99, 235, 0.10), transparent);
  backdrop-filter: blur(6px);
}

.nav-link {
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 253, 0.18);
  color: #e5e7eb;
  transition: all 0.22s ease;
}

.nav-link:hover {
  background: linear-gradient(90deg, #1d4ed8, #facc15);
  color: #020817;
  box-shadow: 0 0 18px rgba(37, 99, 235, 0.6);
  transform: translateY(-1px);
}

/* ---------- SECTION PRINCIPALE ---------- */
.hero {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  padding: 120px 20px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

/* halo lumineux derrière le logo */
.hero::before {
  content: "";
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.22), transparent);
  filter: blur(2px);
  z-index: 0;
}

/* ---------- LOGO ---------- */
.logo-wrapper {
  position: relative;
  z-index: 2;
  margin-bottom: 16px;
}

.logo-pulse {
  width: 280px; /* plus grand qu’avant */
  height: 280px;
  border-radius: 50%;
  background: #020817;
  border: 3px solid #1d4ed8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow:
    0 0 35px rgba(37, 99, 235, 0.9),
    0 0 80px rgba(250, 204, 21, 0.2);
  animation: pulse 1.8s infinite;
}

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

@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow:
      0 0 35px rgba(37, 99, 235, 0.9),
      0 0 80px rgba(250, 204, 21, 0.2);
  }
  50% {
    transform: scale(1.07);
    box-shadow:
      0 0 60px rgba(37, 99, 235, 1),
      0 0 120px rgba(250, 204, 21, 0.4);
  }
  100% {
    transform: scale(1);
    box-shadow:
      0 0 35px rgba(37, 99, 235, 0.9),
      0 0 80px rgba(250, 204, 21, 0.2);
  }
}

/* ---------- TEXTE CENTRAL ---------- */
.site-name {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #facc15; /* Jaune */
  text-shadow: 0 0 18px rgba(250, 204, 21, 0.4);
  margin-top: 10px;
  margin-bottom: 14px;
  z-index: 2;
}

.subtitle {
  font-size: 1rem;
  color: #9ca3af;
  max-width: 520px;
  margin: 0 auto 26px;
  z-index: 2;
}

/* ---------- BOUTON ---------- */
.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  z-index: 2;
}

.btn-primary {
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: linear-gradient(90deg, #1d4ed8, #2563eb);
  color: #e5e7eb;
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.6);
  transition: all 0.22s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.9);
}

/* ---------- FOOTER ---------- */
footer {
  width: 100%;
  padding: 14px 24px 18px;
  font-size: 0.7rem;
  color: #4b5563;
  display: flex;
  justify-content: center;
  gap: 10px;
}

footer .highlight {
  color: #1d4ed8;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 600px) {
  .logo-pulse {
    width: 200px;
    height: 200px;
  }

  .site-name {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 0.9rem;
  }
}