quantity-input, quantity-input * {
  box-sizing: border-box;
}

quantity-input {
  border: 1px solid #ccc;
  border-radius: .25rem;
  width: 7rem;
  height: 2.5rem;
  display: inline-flex;
  overflow: hidden;
}

quantity-input button {
  cursor: pointer;
  background: #f8f9fa;
  border: none;
  flex-shrink: 0;
  justify-content: center;
  align-items: center;
  width: 2rem;
  height: 100%;
  padding: 0;
  font-size: 1rem;
  line-height: 0;
  display: flex;
}

quantity-input button:hover {
  background: #e9ecef;
}

quantity-input button:active {
  background: #dee2e6;
}

quantity-input input {
  text-align: center;
  border: none;
  flex: 1;
  min-width: 0;
  height: 100%;
  padding: 0 .25rem;
  font-size: 1rem;
}

quantity-input input:focus {
  outline: none;
}