body {
	margin: 0;
	height: 100vh;
	min-height: 100dvh;
	background-color: black;
	display: flex;
	justify-content: center;
	align-items: center;
	position: relative;
	overflow: hidden;
	font-family: Arial, Helvetica, sans-serif;
}

#particle-canvas {
	position: fixed;
	inset: 0;
	width: 100%;
	height: 100%;
	z-index: 0;
	pointer-events: auto;
	touch-action: none;
	display: block;
}

.center-button {
	position: relative;
	z-index: 2;
	padding: 15px 30px;
	font-size: 18px;
	color: white;
	background-color: #222;
	border: 2px solid white;
	cursor: pointer;
	transition: opacity 0.6s ease;
}

.center-button.fade-out {
	opacity: 0;
	pointer-events: none;
}

.center-button:hover {
	background-color: white;
	color: black;
}

#birthday-message {
	position: fixed;
	left: 50%;
	top: 30%;
	transform: translate(-50%, -50%) scale(0.96);
	z-index: 2;
	color: #ff32ff;
	font-size: 2rem;
	font-weight: 600;
	opacity: 0;
	pointer-events: none;
	text-shadow: 0 6px 18px rgba(248, 28, 248, 0.18);
	transition: opacity 0.8s ease, transform 0.8s cubic-bezier(.2, .8, .2, 1);
	white-space: normal;
	text-align: center;
	max-width: calc(100vw - 32px);
}

#birthday-message.show {
	opacity: 1;
	transform: translate(-50%, -50%) scale(1);
}

@media (max-width: 480px) {
	#birthday-message {
		font-size: 1.2rem;
	}
}