<button>click me</button>

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

body {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

button {
  background-color: rgb(241, 72, 72);
  color: white;
  padding: 0.75rem 2.5rem;
  border-radius: 2rem;
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  font-size: medium;
  font-weight: bold;
  transition: transform 0.2s, opacity 0.1s;
}

button:hover {
  opacity: 0.9;
}

button:active {
  transform: scale(0.95);
}