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

html, body{
  width: 100vw;
  height: 100vh;
  background-color: seashell;

  display: flex;
  align-items: center;
  justify-content: center;
}

main{
  width: 28vw;
  border-radius: 20px;
  background-color: cadetblue;
  box-shadow: 3px 3px 15px gray;
  padding: 20px;
  border: 1px solid gray;

  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media screen and (max-width: 500px) {
  main{
    width: 90vw;
  }
}


#screen{
  width: 100%;
  background-color: whitesmoke;
  border-radius: 10px;
  padding: 10px 15px;
  display: flex;
  align-items: center;
}

#displayText{
  text-align: right;
  font-weight: 500;
  width: 100%;
  font-size: 42px;
  border: none;
  background-color: transparent;
  outline: none;
}


.key{
  padding: 20px 0;
  background-color: darkorchid;
  font-weight: 500;
  font-size: 24px;
  border-radius: 10px;
  cursor: pointer;
  border: 2px solid cadetblue;
  color: seashell;
  transition: all 0.3s ease;
}

.key:hover{
  border: 2px solid seashell;
}


.keys{
  display: grid;
  gap: 5px;
  grid-template-rows: 1fr 1fr;
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

#keyClear, #keyEquals, #keyAllClear{
  background-color: orangered;
}
#keyEquals{
  grid-column: span 2;
}

#keyAdd, #keyMultiply, #keySubtract, #keyDivide, #keyPercent, #keyDot{
  background-color: darkslategray;
}

#keyMultiply{
  font-size: 22px;
}

#displayText::placeholder{
  font-size: 20px;
}