body {
  background-color: #1a1a1a;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 12px;
  color: #cccccc;
  margin: 40px;
}

h2 {
  font-size: 18px;
  font-weight: bold;
  color: #ffffff;
  border-bottom: 1px solid #444444;
  padding-bottom: 5px;
  margin-bottom: 20px;
  width: 350px;
}

form {
  width: 350px;
}

form div {
  margin-bottom: 12px;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 3px;
  color: #999999;
}

input[type="number"], select {
  border: 1px solid #555555;
  background-color: #2b2b2b;
  color: #ffffff;
  padding: 2px;
  font-size: 12px;
  width: 160px;
}

input[type="number"]:focus {
  border-color: #0066ff;
  outline: none;
}

button {
  margin-top: 10px;
  padding: 4px 12px;
  background-color: #333333;
  border: 1px solid #666666;
  color: #ffffff;
  font-size: 12px;
  cursor: pointer;
}

button:hover {
  background-color: #444444;
  border-color: #999999;
}

.wynik {
  margin-top: 25px;
  padding: 10px;
  border: 1px solid #0066ff;
  background-color: #001a33;
  width: 330px;
  color: #ffffff;
}

.wynik strong {
  color: #3399ff;
  font-size: 14px;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type=number] {
  -moz-appearance: textfield;
}