styles.css

body {
	margin: 0;
	padding: 0;
	background-color: #000;
}

.container {
	width: 100%;
	height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
	display: flex;
}

#terminal {
	width: 100%;
	flex: 1 0;
}

.xterminal {
	position: relative;
	padding: 16px;
	width: calc(80ch + 16px * 2);
	height: 60%;
	background: black;
	/* linear-gradient(0deg, #000, #272727); */
	border-radius: 7px;
	display: flex;
}

.xterminal:before,
.xterminal:after {
	content: '';
	position: absolute;
	left: -1px;
	top: -1px;
	border-radius: 7px;
	background: linear-gradient(45deg, #fb0094, #0000ff, #00ff00, #ffff00, #ff0000, #fb0094,
			#0000ff, #00ff00, #ffff00, #ff0000);
	background-size: 400%;
	width: calc(100% + 2px);
	height: calc(100% + 2px);
	z-index: -1;
	animation: steam 120s linear infinite;
}

.xterm .xterm-viewport {
	overflow-y: auto;
	scrollbar-color: var(--highlight) var(--dark);
	scrollbar-width: thin;
}

.xterm-viewport::-webkit-scrollbar {
	background-color: var(--dark);
	width: 5px;
}

.xterm-viewport::-webkit-scrollbar-thumb {
	background: var(--highlight);
}

@keyframes steam {
	0% {
		background-position: 0 0;
	}

	50% {
		background-position: 400% 0;
	}

	100% {
		background-position: 0 0;
	}
}

.xterminal:after {
	filter: blur(50px);
	opacity: calc(1 / 3);
}