Stacked Rainbow Cards

Stacked Rainbow Cards developed using HTML, CSS. Stacks the cards with a retro rainbow theme. Hover over the cards to animate the colors, and check out the CSS to see how box-shadow came into play.

See the Pen Stacked rainbow cards by Sarah Fossheim (@fossheim) on CodePen.

Created on March 7, 2020 Updated on March 13, 2020. A Pen by Sarah Fossheim on CodePen. License.

<link href="https://fonts.googleapis.com/css?family=Archivo+Black&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css?family=Archivo:700&display=swap" rel="stylesheet">


<div class="card">
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</div>
.card {
  background-color: var(--background);
  display: block;
  width: 300px;
  min-height: 90px;
  cursor: pointer;
  padding: 15px;
  margin: calc(50vh - 30px) auto 0 auto;
  border: 3px solid var(--primary);
  box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--green),
        20px -20px 0 -3px var(--background), 20px -20px var(--yellow),
        30px -30px 0 -3px var(--background), 30px -30px var(--orange),
        40px -40px 0 -3px var(--background), 40px -40px var(--red);
}

.card:hover {
  animation: shadow-wave 1s ease infinite;
}


@keyframes shadow-wave {
  0% {
    border: 3px solid var(--primary);
    box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--green),
      20px -20px 0 -3px var(--background), 20px -20px var(--yellow),
      30px -30px 0 -3px var(--background), 30px -30px var(--orange),
      40px -40px 0 -3px var(--background), 40px -40px var(--red);
  }
  20% {
    border: 3px solid var(--red);
    box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--primary),
      20px -20px 0 -3px var(--background), 20px -20px var(--green),
      30px -30px 0 -3px var(--background), 30px -30px var(--yellow),
      40px -40px 0 -3px var(--background), 40px -40px var(--orange);
  }
  40% {
    border: 3px solid var(--orange);
    box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--red),
      20px -20px 0 -3px var(--background), 20px -20px var(--primary),
      30px -30px 0 -3px var(--background), 30px -30px var(--green),
      40px -40px 0 -3px var(--background), 40px -40px var(--yellow);
  }
  60% {
    border: 3px solid var(--yellow);
    box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--orange),
      20px -20px 0 -3px var(--background), 20px -20px var(--red),
      30px -30px 0 -3px var(--background), 30px -30px var(--primary),
      40px -40px 0 -3px var(--background), 40px -40px var(--green);
  }
  80% {
    border: 3px solid var(--green);
    box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--yellow),
      20px -20px 0 -3px var(--background), 20px -20px var(--orange),
      30px -30px 0 -3px var(--background), 30px -30px var(--red),
      40px -40px 0 -3px var(--background), 40px -40px var(--primary);
  }
  100% {
    border: 3px solid var(--primary);
    box-shadow: 10px -10px 0 -3px var(--background), 10px -10px var(--green),
      20px -20px 0 -3px var(--background), 20px -20px var(--yellow),
      30px -30px 0 -3px var(--background), 30px -30px var(--orange),
      40px -40px 0 -3px var(--background), 40px -40px var(--red);
  }
  
}








:root {
  --primary: #22D2A0;
  --secondary: #192824;
  --background: #192824;
  --green: #1FC11B;
  --yellow: #FFD913;
  --orange: #FF9C55;
  --red: #FF5555;
} 

*{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  background-image: radial-gradient(var(--secondary) 30%, var(--background) 30%);
  background-size: 2px 3px;
  font-family: "Archivo", sans-serif;
  color: var(--primary);
}

.card p {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.card h2 {
  font-size: 14px;
  font-family: "Archivo Black", "Archivo", sans-serif;
  font-weight: normal;
}
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