body {
  max-width: 100% !important;
}

.prisberegner-basic {
  font-family: Arial, sans-serif;
  max-width: 500px;
  margin: 0 auto;
  padding: 20px;
  box-sizing: border-box;
  display: inline-block;
}

.prisberegner-basic form {
  display: flex;
  flex-direction: column;
}

.prisberegner-basic label, .prisberegner-basic input {
  margin-bottom: 10px;
}