:root{
    /* Palette colori principali */
    --border: #e5e5e5;
    --text: #222;
    --muted: #777;
    --bg: #fafafa;
  
    /* Tooltip e ombre */
    --tooltip-bg: #222;
    --tooltip-fg: #fff;
    --shadow: 0 8px 30px rgba(0,0,0,.08),
              0 2px 10px rgba(0,0,0,.06);
  }
  
  /* Reset base */
  *{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body{
    margin:0;
    font-family:'Montserrat', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    color:var(--text);
    background:var(--bg);
    text-transform:uppercase; /* look premium */
    letter-spacing:.5px;
    line-height:1.6;
  }
  
  /* Layout comuni */
  .container{
    max-width:1100px;
    margin:2.2rem auto;
    padding:0 1rem 3rem;
  }
  
  h1{
    text-align:center;
    margin:2.2rem 0 2.8rem;
    font-weight:600;
    font-size:1.9rem;
  }
  
  /* Bottone WhatsApp */
  .whatsapp-button {
    position: fixed;
    bottom: 16px;
    right: 24px;
    width: 44px;
    height: 44px;
    background-color: #25D366; /* verde ufficiale */
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,.25);
    z-index: 9999;
    transition: transform .2s ease, box-shadow .2s ease;
    text-decoration: none;
  }
  .whatsapp-button:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 18px rgba(0,0,0,.35);
  }
  .whatsapp-icon {
    width: 24px;
    height: 24px;
    pointer-events: none;
  }
  .whatsapp-tooltip {
    position: absolute;
    bottom: 54px;
    right: 24px;
    transform: translateX(50%);
    background: #222;
    color: #fff;
    padding: 5px 9px;
    border-radius: 6px;
    font-size: 0.7rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  .whatsapp-button:hover .whatsapp-tooltip {
    opacity: 1;
    transform: translateX(50%) translateY(-4px);
  }
  
  /* Dark mode */
  @media (prefers-color-scheme: dark){
    :root {
      --border: #444;
      --text: #eaeaea;
      --muted: #aaa;
      --bg: #121212;
      --tooltip-bg: #000;
      --tooltip-fg: #fff;
    }
    body {
      background: var(--bg);
      color: var(--text);
    }
    .whatsapp-button {
      box-shadow: 0 4px 12px rgba(0,0,0,.6);
    }
  }