body {
  font-family: Arial, sans-serif;
  background: transparent;
  padding: 0;
  margin: 0;
}

h5 {
  font-size: 14px;
  margin: 0 0 12px 0;
  font-weight: bold;
}

.card {
  width: 220px;
  border: 1px solid #ddd;
  background: #f2f2f2;
  border-radius: 12px;
  padding: 16px;
  margin: auto;
  box-shadow: 0 6px 10px rgba(0,0,0,0.1);
}

label {
  display: block;
  margin: 10px 0 4px;
  font-size: 13px;
}

input, select, button {
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
  margin-bottom: 10px;
  border-radius: 12px;
  border: 1px solid #ccc;
  font-size: 14px;
}

button {
  background: #ff7a00;
  color: #fff;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #e66e00;
}

#result {
  margin-top: 8px;
  font-weight: bold;
}

#error {
  margin-top: 8px;
  color: red;
}

.note {
  margin-top: 12px;
  font-size: 11px;
  color: #555;
}