/* ===== Navigation Bar ===== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.7); /* léger fond blanc transparent */
  backdrop-filter: blur(8px);
  z-index: 1000;
  padding: 0.4em 0;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

#header nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2em;
  margin: 0;
  padding: 0;
}

#header nav ul li a {
  text-decoration: none;
  font-weight: 600;
  color: #333;
  transition: color 0.3s ease;
}

#header nav ul li a:hover {
  color: #7a52c7; /* violet doux */
}

#wrapper {
  padding-top: 70px;
}

html {
  scroll-behavior: smooth;
}

section, div {
  display: block;
  width: 100%;
}