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

/* Canvas plein écran */
#graph-bg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  background: #0b0f1a; /* fond sombre (changeable) */
}

/* Contenu visible au-dessus */
.content {
  position: relative;
  z-index: 1;
  min-height: 100vh;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  color: #ffffff;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  text-align: center;
}

.content h1 {
  font-size: 3rem;
  letter-spacing: 0.05em;
}

.content p {
  opacity: 0.7;
  margin-top: 0.5rem;
}