Efekt naciśnięty przycisk CSS

<body>
  <div class="container">
    <button class="button">Click Here</button>
  </div>
</body>

:root {
  --primary: #25abd9;
  --primary-dark: #2090b7;
}

* {
  box-sizing: border-box;
}

body {
  background-color: #dcf5ff;
  margin: 0;
  padding: 0;
}

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

.button {
  background: var(--primary);
  border: 0;
  border-radius: 5px;
  box-shadow: 0 6px 0 var(--primary-dark), 0 5px 15px -4px #000;
  color: #fff;
  cursor: pointer;
  font-family: roboto;
  font-size: 20px;
  font-weight: 800;
  height: 50px;
  padding: 5px;
  text-transform: uppercase;
  transition: box-shadow 0.2s ease-in-out, margin-top 0.2s ease-in-out,
    opacity 0.2s ease-in-out;
  width: 150px;
}

.button:hover,
.button:focus {
  opacity: 0.9;
  outline: 0;
}

.button:active {
  box-shadow: none;
  margin-top: 6px;
}
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