body {
  margin: 0;
  height: 100vh;
  background: linear-gradient(135deg, #667eea, #764ba2);
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: sans-serif;
  color: #fff;
}

.card {
  background: rgba(0, 0, 0, 0.25);
  padding: 25px;
  border-radius: 10px;
  width: 320px;
  box-sizing: border-box;
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

label {
  display: block;
  margin-top: 10px;
}

input,
select,
button,
.result {
  width: 100%;
  box-sizing: border-box;
  border-radius: 5px;
  border: none;
  padding: 8px;
}

button {
  margin-top: 20px;
  cursor: pointer;
  background: #4caf50;
  color: #fff;
  font-size: 16px;
}

.result {
  margin-top: 15px;
  text-align: center;
  font-weight: bold;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 5px;
  height: 60px;
  padding: 12px 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  word-wrap: break-word;
}