:root {
  --font-colour: #fcf8e8;
  --first-bg: #d61c4e;
  --second-bg: #3ab4f2;
  --third-bg: #ff9f29;
  --hover-bg: #000000;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  width: 100%;
  height: 100vh;
  display: grid;
  place-content: center;
  background-color: #fee2c5;
}

.container {
  display: flex;
  gap: 4rem;
}

.btn {
  padding: 0.75rem 2rem;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--font-colour);
  cursor: pointer;
  transition: background 0.3s, box-shadow 0.3s;
}

.first {
  background-color: var(--first-bg);
  border: 2px solid var(--first-bg);
}

.first:hover {
  box-shadow: 5px 5px 0 var(--first-bg);
  background-color: var(--hover-bg);
}

.second {
  background-color: var(--second-bg);
  border: 2px solid var(--second-bg);
}
.second:hover {
  box-shadow: 5px 5px 0 var(--second-bg);
  background-color: var(--hover-bg);
}

.third {
  background-color: var(--third-bg);
  border: 2px solid var(--third-bg);
}
.third:hover {
  box-shadow: 5px 5px 0 var(--third-bg);
  background-color: var(--hover-bg);
}