<div class="container">
  <button class="btn btn1">Click Me!</button>
  <button class="btn btn2">Click Me!</button>
  <button class="btn btn3">Click Me!</button>
</div>
.container {
  width: min(70vw, 50rem);
  margin: 3rem auto;
  padding: 3em;
  background: white;
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  place-items: center;
}

.btn {
  display: inline-block;
  cursor: pointer;
  text-decoration: none;
  font-size: inherit;
  border: 0;
  line-height: 1;
  background: none;
  padding: .75em 1.5em;
  transition: outline-offset 0.2s ease;
}

.btn1 {
  color: #6c5ce7;
  outline: 2px solid #6c5ce7;
  border: 2px solid #6c5ce7;
  outline-offset: -2px;
}

.btn1:hover,
.btn1:focus {
  outline: 2px solid #6c5ce7;
  outline-offset: 2px;
}

.btn2 {
  color: #d63031;
  outline: 2px solid #d63031;
  border: 2px solid #d63031;
  outline-offset: -2px;
}

.btn2:hover,
.btn2:focus {
  outline: 2px solid #d63031;
  outline-offset: -7px;
}

.btn3 {
  color: #00b894;
  outline: 2px solid #00b894;
  border: 2px solid #00b894;
  outline-offset: -2px;
  transition: outline-width 200ms ease, outline-offset 200ms ease;
}

.btn3:hover,
.btn3:focus {
  outline: 2px solid #00b894;
  outline-width: 9px;
  outline-offset: -9px;
}
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