@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;1,900&display=swap");

*,
*::after,
*::before {
  margin: 0 0;
  padding: 0 0;
  box-sizing: border-box;
  font-family: "Roboto", sans-serif;
}

*::selection {
background: rgba(37, 249, 245, 1);
}

.container {
  height: 100vh;
  width: 100%;
  background-image: radial-gradient(
    circle farthest-corner at 7.2% 13.6%,
    rgba(37, 249, 245, 1) 0%,
    rgba(8, 70, 218, 1) 90%
  );
  display: grid;
  place-items: center;
}

.box {
  width: 20rem;
  display: grid;
  grid-template-rows: minmax(6rem, auto) repeat(5, 5rem);
  grid-template-columns: repeat(4, 5rem);
  overflow: hidden;
  border-radius: 5px;
}

.display {
  grid-column: -1 /1;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  justify-content: end;
  align-items: center;
  padding: 1rem;
  font-size: 2rem;
  color: rgba(255, 255, 255, 0.8);
  border: none;
  word-wrap: break-word;
  word-break: break-all;
}

button:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.9);
}

.two {
  grid-column: span 2;
}

button {
  border: 1px solid rgba(128, 128, 128, 0.6);
  background: rgba(255, 255, 255, 0.6);
  font-size: 1em;
}

button:hover {
  background: rgba(255, 255, 255, 0.9);
}