@font-face {
  font-family: "Geist Mono";
  src: url(https://assets.codepen.io/605876/GeistMonoVariableVF.ttf);
}

*,
*::before,
*::after {
	transform-style: preserve-3d;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: "Geist Mono", monospace;
  background: hsl(0 0% 2%);
  color-scheme: dark only;
}

body::before {
	--line: hsl(0 0% 95% / 0.15);
	--size: 60px;
	content: "";
	height: 100vh;
	width: 100vw;
	position: fixed;
	background:
		linear-gradient(90deg, var(--line) 1px, transparent 1px var(--size)) 50% 50% / var(--size) var(--size),
		linear-gradient(var(--line) 1px, transparent 1px var(--size)) 50% 50% / var(--size) var(--size);
	mask: linear-gradient(-15deg, transparent 30%, white);
	top: 0;
	transform-style: flat;
	pointer-events: none;
	z-index: -1;
}

button {
  font-family: "Geist Mono", monospace;
  text-transform: uppercase;
  color: canvasText;
  padding: 1rem 2rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
  transform-style: preserve-3d;
}

button::after {
  content: ""; 
  position: absolute;
  inset: 0;
  background: hsl(0 0% 100%);
  opacity: calc(var(--intent, 0) * 0.0875);
  transition: opacity 0.2s;
}

button:is(:hover, :focus-visible) {
  --intent: 1;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

button > span:not(.sr-only) {
  position: relative;
  color: transparent;
}

button > span:not(.sr-only)::after {
  content: attr(data-char);
  position: absolute;
  display: inline-block;
  inset: 0;
  color: canvasText;
}

button:is(:hover, :focus-visible) > span:not(.sr-only)::after {
  animation: flash calc(var(--speed, 0.25) * 1s) calc(var(--index, 0) * 0.05s) steps(1, end);
}

@keyframes flash {
  0%, 20%   { content: '_'; }
  40%  { content: var(--char-1); }
  60%  { content: var(--char-2); }
  80%  { content: var(--char-3); }
}

[data-explode=true] button:is(:hover, :focus-visible) {
	--intent: 0;
}

[data-explode=true]:has(button:is(:hover, :focus-visible)) .dummy {
	--intent: 1;
}

[data-explode=true] #app {
	transform: translate3d(0, 0, 100vmin) rotateX(-24deg) rotateY(40deg);
}

[data-explode=true] button {
	scale: 2.4;
}

button:not(.dummy)::before {
	content: ".char ::after";
	position: absolute;
	left: 100%;
	white-space: nowrap;
	translate: 0 -50%;
	transform-origin: 0 50%;
	scale: 0.5;
	top: 50%;
	text-transform: none;
	pointer-events: none;
	opacity: 0;
}

[data-explode=true] #app {
	transition: transform 0.5s 1s;
}

[data-explode=true] button {
	transform: translate3d(0, 0, 50px);
	transition: transform 0.5s 2s, scale 0.5s 0s;
}

[data-explode=true] .dummy {
	opacity: 1;
	transform: translate3d(0, 0, -50px);
	transition: transform 0.5s 2s, scale 0.5s 0s, opacity 0s 0s;
}

[data-explode=true] button:not(.dummy)::before {
	opacity: 1;
	transition: opacity 1s 3s;
}

button:not(.dummy)::before {
	transition: opacity 0.5s 0s;
}

button {
	transition: transform 0.5s 1s, scale 0.5s 3s, opacity 0s 3s;
}

#app {
	transform: translate3d(0, 0, 100vmin) rotateX(0deg) rotateY(0deg);
	transition: transform 0.5s 2s;
}

.dummy {
	position: absolute;
	top: 50%;
	left: 50%;
	translate: -50% -50%;
	white-space: nowrap;
	opacity: 0;
	pointer-events: none;
	color: hsl(0 0% 100% / 0.5);
}

/* Social */
.bear-link {
	color: canvasText;
	position: fixed;
	bottom: 1rem;
	left: 1rem;
	width: 48px;
	aspect-ratio: 1;
	display: grid;
	place-items: center;
	opacity: 0.8;
}

:where(.x-link, .bear-link):is(:hover, :focus-visible) {
	opacity: 1;
}
.bear-link svg {
	width: 75%;
}