body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
                 Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background-color: #f4f5f7;
  }
  
  .vt-container {
    padding: 16px;
  }
  
  h1 {
    font-size: 18px;
    margin: 0 0 8px 0;
    color: #333;
  }
  
  .vt-intro {
    font-size: 13px;
    color: #555;
    margin: 0 0 16px 0;
  }
  
  .vt-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
  }
  
  .vt-btn {
    border: none;
    padding: 10px 12px;
    font-size: 14px;
    border-radius: 4px;
    cursor: pointer;
    text-align: left;
    transition: transform 0.05s ease, box-shadow 0.05s ease, opacity 0.1s ease;
  }
  
  .vt-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
  }
  
  .vt-btn:active {
    transform: translateY(0);
    box-shadow: none;
    opacity: 0.85;
  }
  
  /* Couleurs différentes par service (restes soft pour Outlook) */
  .vt-btn-it {
    background-color: #e3f2fd;
  }
  
  .vt-btn-achat {
    background-color: #e8f5e9;
  }
  
  .vt-btn-qualite {
    background-color: #fff3e0;
  }
  
  .vt-note {
    font-size: 12px;
    color: #777;
  }
  
  code {
    background-color: #eee;
    padding: 2px 4px;
    border-radius: 3px;
    font-size: 12px;
  }