body {
  font-family: Arial, sans-serif;
  margin: 0; padding: 0;
  background: #f5f5f5; color: #333;
}
/* Style du header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background: #1a1a1a;
  color: white;
}

/* Logo avec hauteur fixe */
header .logo img {
  height: 25px;       /* 🔹 Taille fixe */
  width: auto;        /* Conserve les proportions */
  display: block;
}

/* Plus petit sur tablettes / mobiles */
@media (max-width: 768px) {
  header .logo img,
  img.logo {
    max-height: 25px;
    max-width: 100px;
  }
}

@media (max-width: 480px) {
  header .logo img,
  img.logo {
    max-height: 34px;
    max-width: 100px;
  }
}

nav a:hover { background: #0055aa; border-radius: 5px; }
.admin-btn { background: red; padding: 6px 12px; border-radius: 5px; }
main { padding: 20px; }
footer {
  background: #003366; color: white;
  text-align: center; padding: 10px;
  margin-top: 20px;
}
form {
  display: flex; flex-direction: column;
  max-width: 500px; margin: 0 auto;
}
form label { margin-top: 10px; }
form input, form select, form textarea {
  padding: 8px; margin-top: 5px; border: 1px solid #ccc; border-radius: 5px;
}
form button {
  margin-top: 15px; padding: 10px;
  background: #003366; color: white;
  border: none; border-radius: 5px;
  font-weight: bold; cursor: pointer;
}
form button:hover { background: #0055aa; }
.logout-btn {
  display: inline-block; background: #cc0000;
  color: white !important; padding: 8px 16px;
  border-radius: 6px; text-decoration: none;
}
.logout-btn:hover { background: #ff3333; }
.msg-success {
  background: #d4edda; color: #155724;
  padding: 10px; border-radius: 5px; margin: 10px 0;
}
.msg-error {
  background: #f8d7da; color: #721c24;
  padding: 10px; border-radius: 5px; margin: 10px 0;
}