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

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
   background-color: #2e4a73;   
}

.calculator {
  width: 380px;
  padding: 25px;
  border-radius: 35px;

  background: rgba(255, 255, 255, 0.05);

  backdrop-filter: blur(20px);

  border: 1px solid rgba(255, 255, 255, 0.1);

  box-shadow:
    0 0 25px rgba(255, 0, 255, 0.25),
    0 0 50px rgba(0, 255, 255, 0.1);
}


.display {
  height: 140px;
  padding: 20px;
  border-radius: 25px;
  margin-bottom: 25px;

  background: rgba(0, 0, 0, 0.25);

  border: 1px solid rgba(255, 255, 255, 0.08);

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  
    text-align: right;
    font-size: 40px;
    

}

#expression {
  color: #a98fff;
  font-size: 18px;
  margin-bottom: 10px;
}

#result {
  width: 100%;
  text-align: right;
  border: none;
  background: none;
  color: white;
  font-size: 56px;
  outline: none;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
}

.btn {
  height: 75px;

  border: none;

  border-radius: 24px;

  background: rgba(255, 255, 255, 0.06);

  color: white;

  font-size: 32px;

  cursor: pointer;

  transition: 0.25s;

  backdrop-filter: blur(15px);

  box-shadow:5px 5px 12px rgba(0,0,0,.3);
 }

.btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.25);
  transition: 0.2s;
}

.operator {
  background: linear-gradient(135deg, #ff8a00, #ff5e00);

  color: white;
}

.function {
  color:white ;
  background-color: #ff8a00;
}

.equal {
  background: linear-gradient(135deg, #ff5ea7, #7b61ff);

  box-shadow: 0 0 20px rgba(255, 94, 167, 0.4);
}

.zero {
  grid-column: span 2;
}
button:active{
    transform: scale(0.95);
}