@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap");

* {
  box-sizing: border-box;
}

body {
  background-color: #006443;
  font-family: "Roboto", sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.button {
  position: relative;
  background-color: rgba(3, 3, 3, 0.445);
  color: aliceblue;
  font-weight: bold;
  height: 35rem;
  width: 28rem;
  padding: 2rem 3rem;
  border-radius: 2rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  text-transform: uppercase;
  overflow: hidden;
  letter-spacing: 1.5px;
}

.button .circle {
  position: absolute;
  background-color: #fff;
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: scale 0.5s cubic-bezier(0.645, 0.045, 0.355, 1);
  opacity: 0.7;
}

@keyframes scale {
  to {
    transform: translate(-50%, -50%) scale(7);
    opacity: 0;
  }
}

button:focus {
  outline: none;
}