body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  color: #fff;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: #ffffff15;
  padding: 30px;
  border-radius: 20px;
  backdrop-filter: blur(15px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  width: 90%;
  max-width: 400px;
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  font-size: 1.8em;
  font-weight: 600;
  color: #ffffff;
}

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 12px;
  border-radius: 12px;
  border: none;
  margin-bottom: 15px;
  font-size: 1em;
  outline: none;
  background-color: #ffffffdd;
  color: #333;
}

.button-group {
  display: flex;
  justify-content: space-between;
}

button {
  width: 48%;
  padding: 12px;
  border-radius: 12px;
  border: none;
  font-size: 1em;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

button:first-child {
  background-color: #28a745;
  color: #fff;
}

button:first-child:hover {
  background-color: #218838;
}

button:last-child {
  background-color: #dc3545;
  color: #fff;
}

button:last-child:hover {
  background-color: #c82333;
}

.output-box {
  margin-top: 20px;
  padding: 15px;
  background: #00000055;
  border-radius: 12px;
  font-size: 1em;
  font-weight: normal;
  color: #fff;
  min-height: 50px;
  white-space: pre-line;
}