body{
    font-family: "Noto Sans JP", "Inter",sans-serif;
    font-size: 16px;
}

img{width: 100%;
object-fit: cover;}

li{list-style: none;}

a{text-decoration: none;
color: black;
display: block;}

a:hover{
    opacity: 0.5;
}

section{
    margin-bottom: 80px;
}

select {
  width: 100%;
  padding-right: 4px;
  appearance: none;
  color: #000;
}

option{
    color: #000;
}

.select-box{
    position: relative;
}

.select-box::after{
    position: absolute;
    content: '';
    border-style: solid;
    border-color: #000 transparent transparent transparent;
    border-width: 8.56px 5px 0px 5px;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}


/* header */
header{
    background-color:#1A2B47 ;
    width: 100%;
    height: 120px;
    display: flex;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
}

.logo{
    width: 320px;
    height: 120px;
}

.header_right_top{
    display: flex;
    justify-content: flex-end;
    line-height: 64px;
}

.login, .cart{
    width: 144px;
    text-align: center;
    margin-right: 16px;
}

.login{
    background-color: #EEF0F2;
}
.cart{
    background-color: #FFD700;
}
.hamburger{
    display: none;
}

.header_right_bottom{
    display: flex;
    line-height: 56px;
}

.header_right_bottom li{
    padding-right: 32px;
}

.header_right_bottom li a{ color: #EEF0F2;}

.header_right_bottom li:hover{
    color: #EEF0F2;
    text-decoration: underline;
    opacity: 0.8;
}

 #mask {
    display: none;
    transition: 0.5s;
  }

/* mainvisual */
.slide_items{
    margin-top: 120px;
    width: 100%;
}

.slide_items img{
    height: calc(100vh - 120px);
    object-fit: cover;
}

.slick-dots li button{
    background-color: #1A2B47;
    border-radius: 50%;
}

.slick-dots li button:before{
    font-size: 0px;
}

.slick-dots .slick-active button{
    background-color:#FFD700;
}

.slick-prev:before, .slick-next:before {
    font-size: 0px;
}

.slick-prev, .slick-next {
    width: 50px;
    height: 50px;
    z-index: 5;
}

.slick-next{
    right: 4px;
}

.slick-next:before{
    content: '';
    border-style: solid;
    border-color: transparent transparent transparent #ffffff;
    border-width: 20px 0px 20px 34.64px;;
}

.slick-prev{
    left: 4px;
}

.slick-prev:before{
    content:'';
    border-style: solid;
    border-color: transparent #ffffff transparent transparent;
    border-width: 20px 34.64px 20px 0px;
}


/* side-dar */
#side-bar{
    position: fixed;
    top: 120px;
    width: 264px;
    padding-inline: 8px;
    padding-top: 16px;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

#side-bar.fixed{
    opacity: 1;
}

#search-box {
  width: 100%; 
  padding: 10px 15px;
  border: 1px solid #EEF0F2; 
  background-color: #ddd;
  border-radius: 50px; 
  color: #333;
}

#search-box::placeholder {
  color: #fff;
font-size: 20px;
}

#side-bar ul{
    padding-block: 16px;
}

#side-bar ul h2,#side-bar ul li{
    padding-block: 8px;
}

#side-bar ul h2{
    background-color: #1A2B47;
    color: #fff;
    padding: 4px;
    font-size: 20px;
}


/* main */
main{margin-left: 264px;
   padding-right: 0.5%;
}

main section h1{
    text-align: center;
    font-size: 32px;
    background-color: #1A2B47;
    color: #fff;
    padding-block: 16px;
    margin-bottom: 24px;
}

.view-more{
    background-color: #FFD700;
    width: 120px;
    border: 1px solid #000;
    margin-left: auto;
    margin-right: 16px;
    margin-top: 24px;
}

.view-more a{
    padding: 8px;
}

.view-more span{
    padding-left: 8px;
}

/* news */
#news dl{
    background-color: #EEF0F2;
    display: flex;
    flex-wrap: wrap;
    padding-block: 16px;
}

#news dd{
    width: 20%;
    padding: 12px 8px;
}

#news dt{
    width: 80%;
    padding-block: 12px;
}

/* new-product */
.item-content{
    display: grid;
    grid-template-columns: repeat(5,1fr);
    gap: 16px;
}

.item-list{
    background-color: #EEF0F2;
    box-shadow: 0 2px 5px 0;
}

.item-list p{
    padding-inline: 8px;
}

.item-list p:first-of-type{
    padding-top: 8px;
}

.item-list p:last-of-type{
    padding-bottom: 8px;
}

/* ranking */
#ranking h2{
    background-color: #fff;
    font-size: 24px;
    padding-block: 8px;
    padding-left: 4px;
}

.item-content .item-list:first-of-type h2{
    color: gold;
}

.item-content .item-list:nth-of-type(2) h2{
    color: silver;
}
.item-content .item-list:nth-of-type(3) h2{
    color: #9A6229;
}


/* category */
.category-content{
    display: flex;
    justify-content: space-evenly;
}

.category-list{
    padding-right: 8px;
}

#category p{
    text-align: center;
}

/* tokushu */
.tokushu-content{
    display: flex;
    justify-content: space-around;
}

.tokushu-content a{
    width: 40%;
}

/* footer */
footer{
    background-color: #EEF0F2;
    padding-bottom: 120px;
}

.page-top{
    padding-block: 24px;
    text-align: end;
    padding-right: 8px;
    background-color: #1A2B47;
}

.page-top a{
    color: #fff;
}

.page-top span{
    padding-right: 16px;
    padding-left: 8px;
}

.arrow-up{
    width: 15px;
}

.footer-content{
    display: flex;
    justify-content: space-around;
    margin-top: 40px;
    text-align: center;
}

.footer-list p,.footer-list li{
    margin-bottom: 16px;
}

.footer-list p{
    font-weight: 600;
}

/* product-page side-bar */
#side-bar-fixed{
    position: fixed;
    width: 264px;
    padding-inline: 8px;
    top: 120px;
    padding-top: 16px;
}

#side-bar-fixed ul{
    padding-block: 16px;
}

#side-bar-fixed ul h2,#side-bar-fixed ul li{
    padding-block: 8px;
}

#side-bar-fixed ul h2{
    background-color: #1A2B47;
    color: #fff;
    padding: 4px;
    font-size: 20px;
}

/* product-page uniform */
.product-page{
    display: flex;
    justify-content: space-between;
    margin-top: 150px;
}

.product-viewer{
    width: 45%;
    margin: 0 auto;
}

.main-image-display{
    position: relative;
    width: 100%;
    height: auto;
    margin-bottom: 40px;
}

.thumbnail-gallery{
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.thumbnail-gallery img{
    width: 88px;
    height: 88px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.2s ease-in-out;
}

.thumbnail-gallery img.selected{
    border-color:#63B3ED
}


.product-detail{
    width: 45%;
    margin: 20px auto;
}

.product-detail h1{
    color: #1A2B47;
    margin-bottom: 32px;
}

.product-page p:first-of-type{
    font-size: 24px;
    margin-bottom: 32px;
}

.product-detail ul li{
    width: 100%; 
  padding: 10px 15px;
  border: 1px solid #EEF0F2; 
  background-color: #ddd;
  border-radius: 50px; 
  color: #333;
  margin-bottom: 24px;
}

.cart-button{
    background-color: #FFD700;
    width: 80%;
    border: 1px solid #000;
    text-align: center;
    margin: 24px auto;
    font-size: 20px;
}

.cart-button a{
    padding: 16px 8px;
}

.product-explain,.product-specification{
    margin-top: 40px;
}

.product-number{
    margin-block: 40px;
}


@media (max-width:900px){

main{margin-left: 0;
   padding-inline: 1%;
}

.cart{
    margin-right: 80px;
}

.hamburger {
    width: 64px;
    height: 64px;
    cursor: pointer;
    position: fixed;
    transition: 0.5s;
    z-index: 20;
    display: block;
  }

.hamburger span {
    width: 40px;
    height: 3px;
    background-color: #fff;
    border-radius: 4px;
    display: block;
    position: absolute;
    left: 0;
    transition: 0.5s;
  }

  .hamburger span:nth-child(1) {
    top: 15px;
  }

  .hamburger span:nth-child(2) {
    top: 30px;
  }

  .hamburger span:nth-child(3) {
    bottom: 15px;
  }

  .open .hamburger span {
    background-color: #fff;
  }

  .open .hamburger span:nth-child(1) {
    transform: translateY(15px) rotate(-45deg);
  }

  .open .hamburger span:nth-child(2) {
    opacity: 0;
  }

  .open .hamburger span:nth-child(3) {
    transform: translateY(-15px) rotate(45deg);
  }

  #mask {
    display: none;
    transition: 0.5s;
  }

  .open #mask {
    width: 100%;
    height: 100%;
    background-color: #000;
    cursor: pointer;
    display: block;
    opacity: 0.8;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
  }

  #side-bar, #side-bar-fixed {
    width: 264px;
    height: 100vh;
    padding-inline: 8px;
    background: #fff;
    position: fixed;
    left: -264px;
    overflow-y: auto;
    transition: 0.5s;
    z-index: 20;
  }

  #side-bar-fixed{
    top: 0px;
  }

  #side-bar.open, #side-bar-fixed.open{
    left: 0;
    opacity: 1;
    top: 0;
  }
    
}

@media (max-width:750px){
    .item-content{
    padding-inline: 4px;
    grid-template-columns: repeat(3,1fr);
    }

    .category-content{
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap:16px;
    }

    .logo{
    width: 200px;
    }

    .login, .cart{
    width: 100px;
    margin-block: 20px;
    line-height: 80px;
    font-size: 12px;
    }

    .header_right_bottom{
    display: none;
    }

    .hamburger{
        margin-block: 28px;
    }

    .footer-content{
    display: grid;
    grid-template-columns:repeat(2,1fr) ;
    gap: 16px;
    }

    .footer-list{
        margin-bottom: 16px;
    }

    footer{
        padding-bottom: 60px;
    }
}

@media (max-width:500px){

    body{
    font-size: 12px;
    }

    .item-content{
    grid-template-columns: repeat(2,1fr);
    }

    .category-content{
    grid-template-columns: repeat(2,1fr);
    }

    .view-more{
        width: 100px;
    }

    .logo{
    width: 120px;
    }

    .login, .cart{
    width: 80px;
    margin-block: 28px;
    line-height: 64px;
    font-size: 12px;
    }

    .product-page{
        flex-direction: column;
    }

    .product-viewer{
        width: 100%;
    }

    .product-detail{
        width: 100%;
    }
}

@media (max-width:400px){
    main section h1{
        font-size: 24px;
    }

    .login, .cart{
    width: 64px;
    font-size: 8px;
    margin-block: 36px;
    line-height: 52px;
    }

    .cart{
        margin-right: 60px;
    }

    .hamburger {
    width: 48px;
    height: 48px;
    margin-block: 36px;
    }

    .hamburger span {
    width: 30px;
    }

    .hamburger span:nth-child(1) {
    top: 10px;
    }

    .hamburger span:nth-child(2) {
    top: 22px;
    }

    .hamburger span:nth-child(3) {
    bottom: 10px;
    }

    .open .hamburger span:nth-child(1) {
    transform: translateY(12.5px) rotate(-45deg);
    }

    .open .hamburger span:nth-child(3) {
    transform: translateY(-12.5px) rotate(45deg);
    }

    #news dd{
    width: 30%;
    }

    #news dt{
    width: 70%;
    }
}