body{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100vw;
}
.container{
    display: flex;
    justify-content: space-around;
}
.container input {
    font-size: 1rem;
    -moz-appearance: textfield;
    height: 90px;
    width: 50px;    
    margin: 10px;
    border-radius: 5px;
    font-size: 44px;
    text-align: center;
}
/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input:focus {
    outline: none;
}
input:valid {
    border-color: #147fc6;
    box-shadow: 0 5px 4px 0px rgba(0, 0, 0, 0.25);
}