body {
  /*Font winslop */
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f7f6;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background-color: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
}

h2 {
  color: #333;
  text-align: center;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: #666;
}

input[type="number"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 10px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

button:hover {
  background-color: #0056b3;
}

.result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 6px;
  text-align: center;
}

/* untuk hasil */
.prima {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.tidak-prima {
  background-color: #fff3cd;
  color: #856404;
  border: 1px solid #ffeeba;
}