body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #eef2ff;
  color: #0f172a;
}

/* HEADER */
.header {
  text-align: center;
  padding: 50px 20px;
  background: linear-gradient(135deg, #1e40af, #2563eb);
  color: white;
}

.logo {
  width: 140px;
  margin-bottom: 15px;
}

.subtitle {
  opacity: 0.9;
  margin-bottom: 15px;
}

.infos {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.infos span {
  background: rgba(255,255,255,0.15);
  padding: 8px 14px;
  border-radius: 20px;
}

/* BUTTON */
.btn {
  background: #f97316;
  color: white;
  padding: 12px 22px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  border: none;
  cursor: pointer;
}

/* NAV */
.nav {
  background: white;
  text-align: center;
  padding: 12px;
  border-bottom: 1px solid #ddd;
}

.nav a {
  margin: 0 10px;
  text-decoration: none;
  color: #1e40af;
  font-weight: bold;
}

.nav a:hover {
  color: #f97316;
}

/* CONTENT */
.container {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 15px;
  margin-bottom: 20px;
  border-top: 5px solid #f97316;
}

.card.light {
  background: #f8fafc;
}

.card.dark {
  background: #0f172a;
  color: white;
}

/* TITLES */
h2 {
  color: #1e40af;
  text-align: center;
}

.card.dark h2 {
  color: white;
}

h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: #f97316;
  margin: 10px auto;
  border-radius: 10px;
}

/* FORMATIONS */
.formations {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.formation {
  width: 220px;
  background: white;
  padding: 15px;
  border-radius: 12px;
  border-left: 5px solid #f97316;
  text-align: center;
}

/* FORM */
.form {
  max-width: 400px;
  margin: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form input,
.form select {
  padding: 10px;
  border-radius: 10px;
  border: 1px solid #ccc;
}

/* FOOTER */
.footer {
  background: #111827;
  color: white;
  text-align: center;
  padding: 15px;
}