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

body {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at top, #1f2937, #020617);
}

.Calculator {
  padding: 25px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.6),
    inset 0 0 10px rgba(255, 255, 255, 0.05);
}

input {
  width: 320px;
  border: none;
  outline: none;
  padding: 22px;
  margin-bottom: 15px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 12px;
  font-size: 38px;
  text-align: right;
  color: #ffffff;
  box-shadow: inset 0 5px 10px rgba(0, 0, 0, 0.6);
}

input::placeholder {
  color: #9ca3af;
}

button {
  width: 65px;
  height: 65px;
  margin: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  font-size: 20px;
  cursor: pointer;
  box-shadow:
    0 8px 15px rgba(0, 0, 0, 0.5),
    inset 0 -2px 5px rgba(255, 255, 255, 0.1);
  transition: all 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.15);
}

button:active {
  transform: scale(0.95);
}

.operator {
  color: #22d3ee;
  font-weight: 600;
}

.equalBtn {
  background: linear-gradient(135deg, #fb7c14, #ff9f43);
  color: #ffffff;
  box-shadow: 0 10px 20px rgba(251, 124, 20, 0.6);
}

.equalBtn:hover {
  background: linear-gradient(135deg, #ff9f43, #fb7c14);
}