/* --- Styles généraux --- */
body {
  font-family: "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #001f3f, #003366);
  color: white;
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- En-tête --- */
header {
  text-align: center;
  padding: 50px 20px 20px;
}

header h1 {
  font-size: 2.2em;
  margin-bottom: 10px;
}

.highlight {
  color: #00bfff;
}

header p {
  font-size: 1.2em;
  color: #ddd;
}

/* --- Choix principal --- */
.choice-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 40px;
}

.choice-card {
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid transparent;
  border-radius: 20px;
  width: 280px;
  padding: 30px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}

.choice-card:hover {
  transform: scale(1.05);
  border-color: #00bfff;
  background: rgba(255, 255, 255, 0.15);
}

.choice-card h2 {
  color: #00bfff;
  margin-bottom: 10px;
}

/* --- Spécifiques --- */
.maths {
  background: linear-gradient(
    145deg,
    rgba(0, 123, 255, 0.15),
    rgba(0, 0, 0, 0.3)
  );
}

.info {
  background: linear-gradient(
    145deg,
    rgba(0, 255, 200, 0.15),
    rgba(0, 0, 0, 0.3)
  );
}

/* --- Pied de page --- */
footer {
  text-align: center;
  padding: 20px;
  margin-top: auto;
  color: #bbb;
  font-size: 0.9em;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}