.complex_container{
  margin: 10px auto;
  display: flex;
  justify-content: space-evenly;
  flex-wrap: wrap;
  width: 500px;
  border-radius: 5px;
  border: 1px solid #E6E6E6;
  font-size: 25px;
}

.complex_label{
  flex: 1 100%;
}

.complex_item{
border: 1px solid #7E7E7E;
border-radius: 3px;
flex: 1;
max-width: 60px;
height: 60px;
text-align: center;
appearance: none;
padding-top: 5px;
font-size: 25px;
margin-bottom: 10px;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

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

.complex_item span{
  margin-top: 12px;
  display: block;
}


#button{
  padding:10px;
  border:none;
  background-color:#3F51B5;
  color:#fff;
  font-weight:900;
  border-radius:5px;
  width:500px;
  transition: all 0.5s ease-in-out;
  height: 36px;
  letter-spacing: 3px;
  display: block;
  margin: 0 auto;
}
#button:hover{
  /* font-weight: 900; */
  transform: scale(1.05);
  background-color: #23348f;
}