body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    padding: 20px;
  }
  
  
  .calendar {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    width: 260px;
    padding: 15px;
  }
  
  .month h2 {
    text-align: center;
    margin-bottom: 10px;
    font-size: 1.3em;
    color: white;
    padding: 8px;
    border-radius: 6px;
  }
  
  /* 3 couleurs répétées pour les mois */
  .calendar:nth-child(3n+1) .month h2 {
    background-color: #4CAF50;
  }
  
  .calendar:nth-child(3n+2) .month h2 {
    background-color: #2196F3;
  }
  
  .calendar:nth-child(3n+3) .month h2 {
    background-color: #FF9800;
  }
  
  .weekdays, .days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
  }
  
  .weekdays div {
    background-color: #ddd;
    text-align: center;
    padding: 3px;
    font-weight: bold;
    border-radius: 4px;
  }
  
  .days div {
    text-align: center;
    padding: 6px;
    background-color: #eee;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
  }
  
  .days div:hover {
    background-color: #4CAF50;
    color: white;
  }
  
  .days .empty {
    background-color: transparent;
    cursor: default;
  }