#kostenrechner {
  max-width: 100%;
  margin: 20px auto;
  padding: 20px;
  background: #ffffff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  font-family: Arial, sans-serif;
  color: #333;
  box-sizing: border-box;
}

#kostenrechner h3 {
  margin-top: 0;
  color: #0073aa;
  font-size: 20px;
  border-bottom: 2px solid #0073aa;
  padding-bottom: 8px;
}

#kostenrechner label {
  font-weight: bold;
  display: block;
  margin-top: 12px;
  font-size: 15px;
}

#kostenrechner input[type="date"],
#kostenrechner input[type="range"],
#kostenrechner select {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  margin-bottom: 16px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
  box-sizing: border-box;
}

#km_wert {
  font-weight: bold;
  color: #0073aa;
}

#kostenrechner #total_price {
  font-size: 24px;
  color: #0073aa;
  margin-top: 10px;
  display: inline-block;
}

/* Mobile Anpassungen */
@media (max-width: 480px) {
  #kostenrechner {
    padding: 15px;
  }

  #kostenrechner h3 {
    font-size: 18px;
  }

  #kostenrechner input[type="date"],
  #kostenrechner input[type="range"],
  #kostenrechner select {
    font-size: 14px;
  }

  #kostenrechner #total_price {
    font-size: 20px;
  }
}