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

body {
  background-color: #222;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 32px;
}

header {
  text-align: center;
  color: white;
  margin-bottom: 20px;
}
h1 {
  text-transform: uppercase;
  margin-bottom: 10px;
}

main {
  width: 320px;
  background-color: #444;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px;
  align-items: center;
  border-radius: 10px;
}

.result {
  background-color: white;
  width: 280px;
  height: 70px;
  color: black;
  font-size: 32px;
  padding: 5px 12px;
  display: flex;
  align-items: center;
  border-radius: 10px;
}

.button {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
}
button {
  padding: 16px 24px;
  border: none;
  color: white;
  font-size: 32px;
  width: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: black;
  border-radius: 5px;
}
button.clear {
  width: 100px;
}
button:hover {
  background-color: #222;
}

button:active {
  transform: scale(1.1);
}