@media screen and (max-width: 640px) {
    
.t-store .t-product__option-variants {
  display: table;
  width: 100%;
  position: relative;
}
.t-store .t-product__option-select {
  font-size: 16px;
  padding: 10px;
}
.t-store .t-product__option-title {
  font-weight: bold;
}

}