.mpi-card {
  max-width: 480px;
  margin: 30px auto;
  padding: 25px;
  background: linear-gradient(135deg, #e3f2fd, #ffffff);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  font-family: Arial, sans-serif;
}

.mpi-card h1 {
  text-align: center;
  margin-bottom: 20px;
}

.mpi-card label {
  display: block;
  margin-top: 12px;
  font-weight: 600;
}

.mpi-card input, .mpi-card select {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  border-radius: 8px;
  border: 1px solid #ccc;
}

.mpi-card button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: #1976d2;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
}

#mpi-result {
  margin-top: 20px;
  padding: 15px;
  background: #f1f8e9;
  border-radius: 10px;
}

.note {
  display: block;
  margin-top: 15px;
  font-size: 12px;
  color: #555;
}