* {
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background: #0f172a;
  margin: auto;
	
  padding: 10px;
}


.container {
  width: 100%;
  max-width: 800px;  /* or your preferred max width */
  margin: auto;
  background: #fff;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  border-radius: 10px;
  box-sizing: border-box;
}


h1 {
  text-align: center;
  color: #111827;
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.subject {
  margin-bottom: 16px;
  position: relative;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.badge {
  background: #d1d5db;
  font-size: 0.7rem;
  color: #111;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}

input[type="number"] {
  width: 100%;
  padding: 10px;
  font-size: 0.95rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  width: 100%;
  background: #2563eb;
  color: white;
  border: none;
  padding: 12px;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 15px;
}

button:hover {
  background: #1e40af;
}

#result {
  margin-top: 20px;
  font-size: 1.1rem;
  font-weight: bold;
  text-align: center;
  color: #111827;
}
/* Responsive */
@media screen and (max-width: 600px) {
  .container {
    padding: 50px;
		margin:auto;
  }

  h1 {
    font-size: 1rem;
  }

  label {
    font-size: 0.85rem;
  }

  input[type="number"] {
    font-size: 0.9rem;
  }

  button {
    font-size: 0.95rem;
  }
}