/* ======== Fond général et typographie ======== */
html, body {
  margin: 0;
  padding: 0;
  background-color: #020d1f;
  font-family: Arial, sans-serif;
  color: #ccc;
  height: 100%;
  overflow-x: hidden;
}

/* ======== Canvas étoilé ======== */
canvas {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
  pointer-events: none; /* Empêche de bloquer les clics ou le scroll */
}

/* ======== Zone principale (main) ======== */
.main-box {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 2rem auto;
  padding: 2rem;
  background-color: rgba(2, 13, 31, 0.75);
  border-radius: 16px;
  text-align: center;
  backdrop-filter: blur(6px);
}

/* ======== Titres ======== */
h1 {
  color: #62b6ff;
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-shadow: 1px 1px 2px #000;
  padding: 0.5rem;
  background: none;
}

h2 {
  color: #4da3ff;
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

/* ======== Paragraphe d’intro ======== */
.intro {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: #ddd;
}

/* ======== Liens ======== */
a {
  color: #4da3ff;
  text-decoration: none;
  font-weight: bold;
}
a:hover {
  text-decoration: underline;
}

/* ======== Cartes (sections de type card) ======== */
.card-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.card-block {
  background-color: rgba(2, 13, 31, 0.75);
  border: 1px solid #4da3ff;
  border-radius: 12px;
  padding: 1.5rem;
  width: 280px;
  flex: 1 1 280px;
  box-shadow: 0 0 12px rgba(77, 163, 255, 0.3);
  transition: transform 0.3s ease;
  position: relative;
  z-index: 3;
}
.card-block:hover {
  transform: scale(1.03);
}
.card-block h2 {
  background-color: #4da3ff;
  color: #020d1f;
  padding: 0.5rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 1.2rem;
  text-align: center;
}

/* ======== Boutons type CTA ======== */
.cta {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  margin-top: 1rem;
  border: 1px solid #4da3ff;
  border-radius: 8px;
  background-color: transparent;
  color: #4da3ff;
  font-weight: bold;
  transition: all 0.2s ease;
}
.cta:hover {
  background-color: #4da3ff;
  color: #000;
}

/* ======== Retour accueil et footer ======== */
.back-home {
  margin-top: 2rem;
  text-align: center;
}
.back-home a {
  color: #4da3ff;
  font-weight: bold;
}

/* ======== Footer harmonisé ======== */
footer {
  text-align: center;
  font-size: 0.85rem;
  color: #62b6ff;
  margin-top: 3rem;
  padding: 1rem;
  background-color: transparent;
}

/* ======== Responsive ======== */
@media (max-width: 768px) {
  .main-box {
    padding: 1rem;
    margin: 1rem;
  }
  .card-block {
    width: 100%;
    max-width: 100%;
  }
  h1 {
    font-size: 1.8rem;
    line-height: 1.3;
    padding: 0 1rem;
  }
}