#container{
  border-radius: 5px;
  margin: 0 auto;
  width: 550px;
  text-align: center;
  background-color: #1F2937;
  color: #ffffff;  
}

#first-part{
  border-radius: 5px 5px 0px 0px;
  display: flex;
  height: 300px;
  flex-direction: column;
  justify-content: space-around;
  font-size: 16px;
}

#second-part{
  height: 400px;
  display: flex;  
  flex-direction: column;
  justify-content: space-evenly;
}

.measurement-boxes{
  margin: 0 auto;
  width: 500px;  
  border-radius: 5px;
  background-color: #273549;
}

h2{
  color: #CCC1FF;
}

#number-box {
  width: 120px;
  height: 80px;
  text-align: center;
  margin: 0px auto;
  border-radius: 5px;
  border: 1px solid #ffffff;
  background: none;
  color: #ffffff;
  font-size: 70px;
  font-weight: bolder;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type=number] {
    -moz-appearance:textfield;}

#convert-btn {
  width: 120px;
  height: 40px;
  margin: 0px auto;
  border-radius: 5px;
  border: none;
  font-size: 18px;
  font-weight: 500;
}
#convert-btn:hover{
  background-color: lightgray;
}