HTML

CSS

JS

:root {
	--font: 2rem;
}

body {
	background-color: rgba(0, 0, 0, 0.3);
}

h1 {
	color: white;
	margin: 0;
	position: relative;
	top: 1rem;
	font-style: italic;
}

button {
	display: flex;
	flex-direction: row;
	align-items: center;
	justify-content: center;
	border: none;
	font-family: 'Open Sans';
	font-size: var(--font);
	border-radius: calc(var(--font) * 0.6);
	padding: calc(var(--font) * 0.5);
	margin: 0;
	line-height: 1;
	position: relative;
	background-color: transparent;
	color: white;
	box-shadow: inset 0 0 0 0 rgb(248, 249, 255, 0.5), inset 0 0 0 0 rgb(248, 249, 255, 0.3), 0 0 0 rgb(248, 249, 255, 0.2);
	transition: all ease 0.2s;
}

button:hover {
	box-shadow: inset 0 0 0 calc(var(--font) * 0.2) rgb(248, 249, 255, 0.5), inset 0 0 calc(var(--font) * 0.2) calc(var(--font) * 0.5) rgb(248, 249, 255, 0.3), 0 0 calc(var(--font) * 0.2) rgb(248, 249, 255, 0.2);
}

button::before {
	content: '';
	height: 110%;
	width: 105%;
	position: absolute;
	border-radius: calc(var(--font) * 0.8);
	background-color: transparent;
}

@keyframes borders {

0%,
	100% {
		border-width: calc(var(--font) * 0.2) calc(var(--font) * 0.1) calc(var(--font) * 0.02) calc(var(--font) * 0.02);
	}

25% {
		border-width: calc(var(--font) * 0.1) calc(var(--font) * 0.02) calc(var(--font) * 0.02) calc(var(--font) * 0.2);
	}

50% {
		border-width: calc(var(--font) * 0.02) calc(var(--font) * 0.02) calc(var(--font) * 0.2) calc(var(--font) * 0.1);
	}

75% {
		border-width: calc(var(--font) * 0.02) calc(var(--font) * 0.2) calc(var(--font) * 0.1) calc(var(--font) * 0.02);
	}
}

button:hover::before {
	border: solid rgb(210, 255, 227, 0.8);
	padding: calc(var(--font) * 0.08);
	box-shadow: inset 0 0 calc(var(--font) * 0.2) calc(var(--font) * 0.2) rgb(186, 201, 255, 0.3);
	filter: blur(calc(var(--font) * 0.06));
	animation: borders infinite 2s linear;
	opacity: 0.5;
}

span {
	height: 100%;
	width: 100%;
	position: absolute;
	overflow: hidden;
	display: flex;
	border-radius: calc(var(--font) * 0.6);
	z-index: -1;
}

span::after {
	content: '';
	height: 100%;
	width: 100%;
	position: absolute;
	background: linear-gradient(90deg, rgb(248, 249, 255, 0), rgb(206, 216, 255, 0.6), rgb(248, 249, 255, 0));
	opacity: 0;
	transform: translateX(-100%);

}

button:hover>span::after {
	opacity: 1;
	transform: translateX(100%);
	transition: all ease 1s;
}

.play-button-container {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	height: fit-content;
	border-radius: 1rem;
	padding: 1rem;
	background-color: rgba(0, 0, 0, 0.2);
	backdrop-filter: blur(50px);
	-webkit-backdrop-filter: blur(50px);
}

.play-button {
	--font: 3rem;
	font-weight: 700;
	color: black;
	border-radius: 4rem;
	height: 12rem;
	width: 25rem;
	box-shadow: inset 0 0 0 0 rgb(248, 249, 255, 0.5);
	border: 1rem solid transparent;
	position: relative;

}

.play-button:hover::before {
	opacity: 0.2;
	border-radius: 4rem;
}

.play-button>span {
	background-color: rgb(247, 255, 25);
	height: 8rem;
	width: 21rem;
	border-radius: 2rem;
}

.play-button>span::after {
	display: none;
}

.play-button:hover {
	box-shadow: inset 0 0 0 calc(var(--font) * 0.15) rgb(248, 249, 255, 0.6);
}

.mode>span {
	background-color: rgb(200, 204, 205);
	height: 6rem;
}

.mode {
	font-size: 1.5rem;
	width: 25rem;
	height: 10rem;
	top: 2rem;
}

Fortnite Button with Animation

A very simple implementation of the Fortnite button with animations. When you hover over a button, it will display a white border with a glowing effect.