#inputB_1,
#inputC_1 {
  width: 80px;
}

#inputC_2,
#btnMethod_1,
#btnMethod_2,
#btnMethod_3,
#btnClear_1,
#btnClear_2,
#btnClear_3 {
  width: 66px;
}

/* *************** 640px *************** */
@media only screen and (max-width: 640px) {

  .selectParams {
    display: flex;
    flex-direction: row;
    justify-content: left;
    align-items: flex-start;
  }
}