body {
                background-color:#03647e;
                 }
	
	.container {
  		height: 500px;
  		width: 380px;
  		border-radius: 10px;
  		border: solid black;
  		background-color:gray;
  		margin: auto;
  		box-shadow:         3px 3px 5px 6px #ccc;
		}

	.display {
  		opacity: .7;
		font-size: medium;
  		border: 1px solid black;
  		background-color:white;
		padding-left: 10px;
  		margin:auto;
  		height:40px;
  		width: 100px;
  		display:flex;
		box-shadow:         4px 4px 4px 4px #ccc;
		}

	button {
		opacity: .9;
  		border: 1px solid black;
  		height:40px; 
		padding: 5px;
		font-size: 1.1rem;
		font-weight: 500;
		line-height: 1.7;
		text-align: center;
		box-shadow:         4px 4px 4px 4px #ccc;
	  
		}

		.buttons {
			padding: 20px;
			display: grid;
			grid-template-columns: 1fr 1fr 1fr 1fr;
			gap: 15px;
		}
		


	h3 {
  		text-align:center;
		margin-bottom: 4px;
		}

	h1 {
  		text-align:center;
		margin-top: 2px;
		padding-left: 18px;
		}

	.blue {
  		color:blue;
		}
	.red {
  		color:red;
		}

	.green {
  		color:green;
		}