.input-group {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.input-group > .form-control {
  position: relative;
  flex: 1 1 auto;
  width: 1%;
  min-width: 0;
}

.input-group > .input-group-text,
.input-group > .form-control {
  margin-bottom: 1vh;
}

.input-group > .input-group-text {
  display: flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  font-size: 1vw;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  text-align: center;
  white-space: nowrap;
  background-color: #e9ecef;
  border: 0.1vw solid black;
  border-radius: 0.612vw;
  max-width: 3vw;
  min-width: 0.5vw;
}

.input-group > .input-group-text:first-child {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group > .input-group-text:last-child {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

.input-group > .form-control:not(:last-child),
.input-group > .input-group-text:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group > .form-control:not(:first-child),
.input-group > .input-group-text:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}