* {
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: darkcyan;
}

h1 {
  color: azure;
}

.btns button {
  width: 100px;
  height: 50px;
  border-radius: 10px;
  font-size: 20px;
  margin: 50px 10px 50px 0;
  color: blue;
  border: 3px inset lime;
  cursor: pointer;
}

input {
  width: 300px;
  height: 70px;
  text-align: center;
  font-size: 20px;
}