/* Style global */
body {
    background-color: #f2f4f7;
    font-family: "Segoe UI", Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding-top: 40px;
    margin: 0;
  }
  
  /* Conteneur principal */
  .container {
    background: #fff;
    padding: 40px 50px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 480px;
    text-align: center;
    animation: fadeIn 0.5s ease;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  /* Titre */
  h1 {
    color: #0d6efd;
    margin-bottom: 30px;
    font-weight: 600;
    font-size: 1.5rem;
  }
  
  /* Champs de formulaire */
  form {
    text-align: left;
  }
  
  .form-group {
    margin-bottom: 20px;
    position: relative;
  }
  
  label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
  }
  
  input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s, background-color 0.3s;
  }
  
  /* Validation visuelle */
  input:invalid {
    border: 2px solid #dc3545;
    background-color: #ffeaea;
  }
  input:valid {
    border: 2px solid #198754;
    background-color: #e9ffe9;
  }
  
  /* ✔ Icone */
  .icon-ok {
    position: absolute;
    right: 10px;
    top: 37px;
    color: #198754;
    font-size: 1.2rem;
    display: none;
  }
  
  input:valid + .icon-ok {
    display: inline-block;
  }
  
  /* Bouton principal */
  .btn-primary {
    width: 100%;
    background-color: #0d6efd;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.3s ease;
  }
  
  .btn-primary:hover {
    background-color: #0b5ed7;
  }
  /* Page de résultat */
.result-box {
    background-color: #ffffff;
    border-radius: 16px;
    padding: 30px 40px;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: left;
    line-height: 1.6;
    animation: fadeIn 0.5s ease;
  }
  
  /* Bouton de retour */
  .btn-return {
    display: inline-block;
    background-color: #0d6efd;
    color: #fff;
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s ease;
  }
  
  .btn-return:hover {
    background-color: #0b5ed7;
  }