body {
  background: #eee;
  font-family: Arial;
  display: flex;
  justify-content: center;
  margin-top: 80px;
}

.container {
  background: white;
  padding: 30px;
  width: 350px;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid #bbb;
  margin-bottom: 15px;
}

button {
  width: 100%;
  padding: 12px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

#result {
  margin-top: 20px;
}