body {
	background-color: #000000; /* Black */
	color: #ffd700; /* Golden yellow */
	margin: 0;
	padding: 0;
  }
  
  nav {
	background-color: #000000; /* Black */
	padding: 20px;
  }
  
  nav h1 {
	margin: 0;
	text-align: center;
	font-size: 50px;
  }
  
  main {
	text-align: center;
	padding: 40px;
  }
table {
	border-collapse: collapse;
	margin-bottom: 10px;
}
td, th {
	border: 1px solid black;
	padding: 5px;
}
form{
	display: flex;
  	justify-content: center;
  	align-items: center;
  	margin-bottom: 20px;
}
h3{
	display: flex;
  	justify-content: center;
  	align-items: center;
  	margin-bottom: 20px;
}
.btn{
	border-radius: 5px ;
	background-color:#ffd700;
	color: #000000;
	width: 120px;
	height: 40px;
}
form input{
	width: 120px;
	height: 30px;
}
.btn-cal{
	margin-left: 660px;
	border-radius: 5px ;
	background-color:#ffd700;
	color: #000000;
	width: 120px;
	height: 40px;
  	justify-content: center;
  	align-items: center;
}