JSFiddle - React, Tailwind, and code Playground

by Julien Roche

HTML

<div class="container">
  <article>
    <div class="glows"></div>
    <h2>Activate by,<br />getting closer</h2>
    <a href="">Learn more</a>
  </article>
</div>

CSS

:root {
  --bg: hsl(246 44% 7%);
  --border: hsl(280 10% 50% / 1);
  --card: hsl(237 36% 10%);
  --color: hsl(240 18% 80%);
  --border-width: 2px;
  --border-radius: 12px;
  --gradient: conic-gradient(
    from 180deg at 50% 70%,
    hsla(0, 0%, 98%, 1) 0deg,
    #eec32d 72.0000010728836deg,
    #ec4b4b 144.0000021457672deg,
    #709ab9 216.00000858306885deg,
    #4dffbf 288.0000042915344deg,
    hsla(0, 0%, 98%, 1) 1turn
  );
}

*,
*:after,
*:before {
  box-sizing: border-box;
}

@property --start {
  syntax: '<number>';
  inherits: true;
  initial-value: 0;
}

body {
  background: var(--bg);
  display: grid;
  place-items: center;
  min-height: 100vh;
  font-family:
    'Geist Sans', 'SF Pro Text', 'SF Pro Icons', 'AOS Icons', 'Helvetica Neue',
    Helvetica, Arial, sans-serif, system-ui;
  font-weight: 70;
  color: var(--color);
}

.container {
  --spread: 60;
  display: flex;
  flex-wrap: wrap;
  flex-direction: var(--direction);
  gap: calc(var(--gap) * 1px);
  margin: 0 auto;
  justify-content: center;
  place-items: center;
  position: relative;
  padding: 2rem;
  touch-action: none;
}

article {
  --active: 0.15;
  --start: 0;
  height: 100%;
  background: var(--card);
  padding: 2rem;
  aspect-ratio: 330 / 400;
  border-radius: var(--border-radius);
  min-width: 280px;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  position: relative;
}

article:is(:hover, :focus-visible) {
  z-index: 2;
}

.glows {
  pointer-events: none;
  position: absolute;
  inset: 0;
  filter: blur(calc(var(--blur) * 1px));
}

.glows::after,
.glows::before {
  --alpha: 0;
  content: '';
  background: var(--gradient);
  background-attachment: fixed;
  position: absolute;
  inset: -5px;
  border: 10px solid transparent;
  border-radius: var(--border-radius);
  mask:
    linear-gradient(#0000, #0000),
    conic-gradient(
      from calc((var(--start) -...