style.css

* {
	font-family: Verdana, Geneva, Tahoma, sans-serif;
	font-size: 16px;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

body {
	display: flex;
	flex-direction: column;
	text-align: center;
	max-width: 800px;
	margin: 20px auto;
}

ul {
	list-style: none;
}

p {
	border: 1px solid black;
	padding: 10px 0;
  margin: 10px;
}

button {
	background-color: #008cba;
	/* Green */
	border: none;
	color: white;
	padding: 16px 32px;
	text-align: center;
	display: inline-block;
	font-size: 1rem;
	margin: 4px 2px;
	padding: 0 10px;
	transition-duration: 0.4s;
	cursor: pointer;
}

.add-button {
	background-color: white;
	color: black;
	border: 2px solid #4caf50;
}

.add-button:hover {
	background-color: #4caf50;
	color: white;
}

.delete-button {
	background-color: white;
	color: black;
	border: 2px solid #008cba;
}

.delete-button:hover {
	background-color: #008cba;
	color: white;
}

.complete-button {
	background-color: white;
	color: black;
	border: 2px solid #555555;
}

.complete-button:hover {
	background-color: #555555;
	color: white;
}

.urgent-button {
	background-color: white;
	color: black;
	border: 2px solid #f44336;
}

.urgent-button:hover {
	background-color: #f44336;
	color: white;
}

.edit-button {
	background-color: white;
	color: black;
	border: 2px solid #e7e7e7;
}

.edit-button:hover {
	background-color: #e7e7e7;
}

.hidden {
	display: none;
}

.completed {
	text-decoration: line-through;
}

.urgent {
	font-size: 18px;
	color: #f44336;
}