@font-face {
    font-family: "Digital7-rg1mL";
    src: url("Digital7-rg1mL.ttf");
  }
  *{
    font-family: Digital7-rg1mL;
  }
.grid-container {
    display: inline-grid;
    grid-template-columns: auto auto auto auto auto auto;
    background-color: #2196F3;
    padding: 10px;
    border-radius: 10px;
  }
  #output{
    background-color: rgb(255, 255, 255);
    border: 10px solid rgba(0, 0, 0, 0.8);
    padding-right: 20px;
    font-size: 100px;
    text-align: right;
    grid-column-start: 1; 
    grid-column-end: 7;
    /* height: 100px; */
  }
  #upper{
    margin: auto;
  }
  #lower{
    margin: auto;
  }
  .grid-item {
    background-color: rgb(255, 255, 255);
    border: 1px solid rgba(99, 99, 99, 0.8);
    text-align: center;
  }
  .igual{
    background-color: rgba(255, 255, 255);
    border: 1px solid rgba(0, 0, 0, 0.8);
    text-align: center;
    grid-column-start: 4; 
    grid-column-end: 7;
    grid-row-start: 5;
    grid-row-end: 6;
  }
  .clear{
    background-color: rgba(255, 255, 255);
    border: 1px solid rgba(0, 0, 0, 0.8);
    text-align: center;
    grid-column-start: 4; 
    grid-column-end: 7;
    grid-row-start: 4;
    grid-row-end: 5; 
  }

  /* Botones ----------- */
  button{
    font-size: 60px;
    border: none;
    background-color: white;
    text-decoration: none;
    height: 100px; width: 110px;
  }
  button:hover{
    background-color: #e7e7e7;
    cursor: pointer;
  }
  button:active{
    background-color: rgb(0, 0, 0);
  }
    /* Botones ----------- */