body {
      font-family: 'Segoe UI', sans-serif;
      background-color: #1e1e1e;
      color: #fff;
      height: 100vh;
      margin: 0;
    }

/*    #openModalBtn {
      position: absolute;
      top: 20px;
      right: 20px;
      padding: 10px 20px;
      font-size: 18px;
      background-color: #444;
      color: white;
      border: none;
      border-radius: 8px;
      cursor: pointer;
    }*/

    .modal {
      display: none;
      position: fixed;
      top: 0;
      right: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0,0,0,0.3);
      z-index: 999;
      pointer-events: none; /* evita clics fuera del modal */
    }

    .modal-content {
      position: absolute;
      top: 50%;
      right: 0;
      transform: translateY(-50%);
      background: #2c2c2c;
      padding: 20px;
      border-radius: 16px 0 0 16px;
      box-shadow: -10px 0 25px rgba(0,0,0,0.5);
      width: 280px;
      text-align: center;
      pointer-events: auto;
    }

    #display {
      width: 100%;
      font-size: 24px;
      padding: 10px;
      margin-bottom: 20px;
      border-radius: 8px;
      border: none;
      text-align: right;
      background-color: #444;
      color: #fff;
    }

    .keyboard {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }

    .key {
      padding: 20px;
      font-size: 22px;
      border: none;
      border-radius: 12px;
      background-color: #888;
      color: #000;
      cursor: pointer;
      transition: background-color 0.2s;
    }

    .key:hover {
      background-color: #aaa;
    }

    .wide {
      grid-column: span 3;
    }

    .close-btn {
      margin-top: 20px;
      background-color: #666;
      color: white;
      border: none;
      padding: 10px;
      border-radius: 8px;
      cursor: pointer;
    }

    .close-btn:hover {
      background-color: #888;
    }