.highlight {
	background-color: yellow;
}

@keyframes shake {
	0% { transform: translateX(0); }
	25% { transform: translateX(-5px); }
	50% { transform: translateX(5px); }
	75% { transform: translateX(-5px); }
	100% { transform: translateX(0); }
}

.error {
	background-color: lightcoral;
	border-color: red;
	animation: shake 0.5s;
}
/* Blue theme and centre align.. */
body {
	background-color: #6fcae9; /* light blue */
	text-align: center;
	font-family: Arial, sans-serif;
	margin: 0;
	padding: 0;
}

.navbar {
	background-color: #30abd4; /* dark blue */
	color: white;
	padding: 10px;
	text-align: center;
	margin-bottom: 20px;
}

.navbar h1 {
	margin: 0;
}

.content-box {
	background-color: #3879da;
	margin: 10px auto;
	padding: 10px;
	width: 80%;
	border-radius: 5px;
	box-shadow: 0 0 10px rgba(32, 32, 32, 0.5);
}