.calculator{
    font-size: 62.5%;
    box-sizing: border-box;
    
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: inherit;
  }

  .calculator {
    border: 1px solid #ccc;
    border-radius: 5px;
    display: block;
    /* top: 50%;
    left: 50%; */
    /* transform: translate(-50%, -10%); */
    width: 400px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 2em;
  }

  .calculator-screen {
    width: 100%;
    font-size: 5rem;
    padding-top: 0.3em;
    height:80px;
    border: none;
    background-color: #252525;
    color: #fff;
    text-align: right;
    padding-right: 20px;
    padding-left: 10px;
    margin-bottom: 0.05em;
  }
.try{
    background-color: black;
    height: 100px;
    width:100%;
}
  button {
    height: 60px;
    background-color: #fff;
    border-radius: 3px;
    border: 1px solid #c4c4c4;
    /* background-color: transparent; */
    font-size: 2rem;
    color: #333;
    /* background-image: linear-gradient(to bottom,transparent,transparent 50%,rgba(0,0,0,.04)); */
    /* box-shadow: inset 0 0 0 1px rgba(255,255,255,.05), inset 0 1px 0 0 rgba(255,255,255,.45), inset 0 -1px 0 0 rgba(255,255,255,.15), 0 1px 0 0 rgba(255,255,255,.15); */
    text-shadow: 0 1px rgba(255,255,255,.4);
  }
  
  button:hover {
    background-color: #eaeaea;
  }
  
  .operator {
    color: #337cac;
  }
  
  .all-clear {
    background-color: #f0595f;
    border-color: #b0353a;
    color: #fff;
  }
  
  .all-clear:hover {
    background-color: #f17377;
  }
  
  .equal-sign {
    background-color: #2e86c0;
    border-color: #337cac;
    color: #fff;
    /* grid-row-start: 2;
    grid-row-end: 6;
    grid-column-start: 4;
    grid-column-end: 5; */
    grid-row: 3 / 6;
    grid-column: 4 / 5;
    height: 100%;
  }
  
  .equal-sign:hover {
    background-color: #4e9ed4;
  }
  .calculator-keys{
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      grid-gap: 2em;
      padding: 1em;
  }

  .decimal{
      grid-column:1/3;
      font-size: 2em;
      font-weight: 700;
      background-color: rgba(211, 255, 122,0.8);
  }
  .play-again{
      grid-row:2/2;
      grid-column:4;
      font-size: 1.5em;
      background-color: rgba(31, 2, 27,0.8);
      color: white;
  }

  .A-K{
    margin-top: 1em;
  }
  .rules{
    margin-bottom: 2em;
  }