body {
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #4c8bf5, #6f42c1);
  font-family: 'Poppins', sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.ram {
  margin-top: 20px;
}

.container {
  background: #fff;
  border-radius: 15px;
  padding: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.input {
  width: 100%;
  padding: 5px;
  border-radius: 8px;
  border: 2px solid black;
  text-align: right;
  font-size: 1.5em;
  margin-bottom: 15px;
}

.button {
  color: #fff;
  width: 60px;
  padding: 15px;
  margin: 5px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(45deg, #7d63f1, #f805d0);
  cursor: pointer;
  transition: 0.2s;
  font-size: 1em;
}

.button:hover {
  background: linear-gradient(45deg, #5d4ae0, #d505b0);
}

.operator {
  background: #f2b632;
}

.equal {
  background: #4CAF50;
}

.text-center {
  text-align: center;
  color: #fff;
}
#display {
    width: 100%;
  font-size: 2em;
  text-align: right;
  overflow-x: auto;
  white-space: nowrap;

}

footer {
  margin-top: 30px;
  padding: 10px;
  text-align: center;
  font-size: 14px;
  background-color: #fff;
  width: 100%;
  color: #555;
}