styles.css

 body {
	margin: 0;
	padding: 0;
	font-family: sans-serif;
	background: gray;
	color: white;
}

form {
	align-items: center;
	text-align: center;
	width: 400px;
	border-radius: 16px;
	display: block;
	height: 250px;
	padding: 40px;
	color: black;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	box-shadow: 3px 3px 2px lightgray;
	background: #fcfcfc;
}

form td {
	color: black;
}

form input[type="submit"] {
	display: inline-block;
	margin-top: 30px;
	width: 100%;
	text-align: center;
	padding: 10px 0px 10px 0px;
	background: #3c4fcf;
	font-size: 20px;
	color: white;
}

table {
	color: fcfcfc;
	background: #E8E8E8;
	text-align: center;
}

#zones-form {
	height: 450px;
}

#delete-btn {
	background: #DC143C;
}

.gray-btn {
	background: #C8C8C8;
	border: none;
}

.logged {
	text-align: center;
}