#product_title {
  --title-size: 13px;
	font-size: var(--title-size);
	font-family: "Noto Sans JP";
	letter-spacing: .05em;
}
@media (min-width:375px){
  #product_title{
    --title-size: 14px;
  } 
}
@media (min-width:390px){
  #product_title{
    --title-size: 15px;
  } 
}
@media (min-width:600px){
  #product_title{
    --title-size: 16px;
  } 
}
.product-image-container {
  padding-block: 8px 32px;
  overflow-x:hidden;
}
.product-main-image .swiper-slide-active img {
  cursor: grab;
}
.product-thumb-image{
  padding-top:12px;
  max-width: 550px;
  overflow-x:hidden;
}
.thumb_image img {
  object-fit: cover;
  width: 100%;
  aspect-ratio: 550/377;
  cursor: pointer
}
.thumb_image:not(.swiper-slide-thumb-active) img {
  filter: saturate(.3);
}
@media(min-width:981px){
  form[name="product_form"] {
    display: grid;
    grid-template-columns: 600px minmax(0,1fr);
    grid-template-areas: "image exp""image data" "image order" "image back" "image info";
    gap:16px 24px;
    align-items: start;
    position:sticky;
    top:0
  }
  .product-image-container { grid-area: image}
  .table.table-bordered {	   grid-area: data}
  .product-order-exp {       grid-area: exp }
  .product-order {           grid-area: order}
  .info-links {              grid-area: info }
  #back_to_home{             grid-area: back }

  .product-image-container {
    position: sticky;
    top: 0;
  }
  .info-links {
    justify-self: end;
    width: clamp(290px,68%,380px);
  }    
}
#back_to_home {
  display: block;
  font-size: 16px;
  color: #fff;
  text-decoration: underline 1px solid;
  text-underline-offset: 5px;
  text-align: center;
  margin-top: 24px;
}
/* 購入フォーム*/
.product-quantity {
  display: grid;
  grid-template-columns: 48px minmax(0,1fr) 48px;
  align-items: center;
  gap: 16px;
  width: min(320px,90%);
  margin: 24px auto;
}
.product-quantity__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 40px;
  color: #333;
}          
.product-quantity__btn svg {
  width: 18px;
  height: 18px;
}
.product-quantity__num label {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
  align-items: center;
  font-weight: 500;
}        
.product-quantity__num input {
  width: 120px;
  height: 40px;
  font-size: 17px;
  font-weight: 700;
  background: #fff;
  text-align: center;
}
.btn-addcart.products-list__btn {
  width: 260px;
  font-size: 17px;
  margin-block: 24px;
  margin-inline: auto;
  padding-block: 16px;
}
.btn-addcart:is(:hover, :focus) {
  border-width: 2px;
  margin-top: 27px;
}
/* 返品等リンク */
.info-links {
  padding-block: 24px;
  padding-left: 1em;
}
.info-links a {
  color: #fff;
}

.input-prepend.input-append input {
  font-size: 24px;
  padding-top: 11px;
  padding-bottom: 11px;
  width: 100px;
  text-align: right;
}
.stock_error {
  color: #DB5656;
}