*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Hiragino Sans",Meiryo,sans-serif;color:#121212;background:#fff;line-height:1.7;font-size:15px}
body.lock{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;-webkit-tap-highlight-color:transparent}

/* header */
.hd{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid #e8e8e8;display:flex;align-items:center;gap:20px;padding:10px 16px;height:56px}
.hd__logo img{height:30px;width:auto}
.hd__nav{display:flex;gap:18px;font-size:14px}
.hd__nav a{padding:4px 0;border-bottom:1.5px solid transparent;color:#444}
.hd__nav a.on{color:#121212;border-color:#121212}

/* hero */
.hero img{width:100%;aspect-ratio:1/1;object-fit:cover}
@media(min-width:768px){.hero img{aspect-ratio:16/8}}

/* brand copy */
.brand{text-align:center;padding:56px 24px;max-width:720px;margin:0 auto}
.brand h2{font-size:20px;font-weight:700;margin-bottom:28px;letter-spacing:.04em}
.brand p{font-size:14px;margin:0 0 14px;color:#333}

/* products */
.products{padding:24px 16px 64px;max-width:1100px;margin:0 auto}
.products h2,.contact h2{font-size:26px;font-weight:700;letter-spacing:.02em;margin-bottom:24px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(min-width:768px){.grid{grid-template-columns:repeat(4,1fr);gap:24px}}
.card{text-align:left;display:block;width:100%;transition:transform .12s}
.card:active{transform:scale(.97)}
.card__img{display:block;overflow:hidden;background:#f4f4f4}
.card__img img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .3s}
.card:hover .card__img img{transform:scale(1.04)}
.card__name{display:block;font-size:13px;margin:10px 0 4px;line-height:1.5}
.card__price{display:block;font-size:14px;font-weight:700}

/* contact */
.contact{text-align:center;padding:48px 16px 72px;border-top:1px solid #e8e8e8}
.contact p{font-size:14px;color:#555;margin-bottom:20px}

/* buttons */
.btn{display:block;width:100%;max-width:360px;margin:0 auto 12px;padding:14px 20px;text-align:center;font-size:15px;font-weight:700;border-radius:2px;transition:transform .1s,opacity .1s;user-select:none}
.btn:active{transform:scale(.97);opacity:.85}
.btn--line{border:1.5px solid #121212;background:#fff}
.btn--buy{background:#121212;color:#fff;margin:14px 0 8px}
.btn--buy.is-off{background:#bbb;cursor:not-allowed}

/* footer */
.ft{background:#fafafa;border-top:1px solid #e8e8e8;padding:28px 16px 40px;text-align:center;font-size:12px;color:#555}
.ft a{display:block;margin-bottom:10px;text-decoration:underline}

/* modal (product detail) */
.modal{position:fixed;inset:0;z-index:50}
.modal__bg{position:absolute;inset:0;background:rgba(0,0,0,.55)}
.modal__box{position:absolute;inset:0;background:#fff;overflow-y:auto;-webkit-overflow-scrolling:touch}
@media(min-width:768px){.modal__box{inset:4vh 6vw;border-radius:6px;max-width:1000px;margin:0 auto}}
.modal__x{position:sticky;top:0;float:right;font-size:28px;line-height:1;padding:10px 16px;z-index:2;background:#fff;border-radius:0 0 0 8px}
.pd{padding:0 16px 48px;clear:both}
@media(min-width:768px){.pd{display:grid;grid-template-columns:1.1fr 1fr;gap:32px;padding:24px 32px 48px}}
.pd__gallery>img{width:100%;aspect-ratio:1/1;object-fit:contain;background:#f6f6f6}
.thumbs{display:flex;gap:8px;margin-top:8px;overflow-x:auto}
.thumbs img{width:64px;height:64px;object-fit:cover;flex:0 0 auto;border:2px solid transparent;cursor:pointer;background:#f6f6f6}
.thumbs img.on{border-color:#121212}
.pd__info h3{font-size:20px;line-height:1.4;margin:18px 0 6px}
.pd__tag{font-size:13px;color:#d33;font-weight:700;margin-bottom:4px}
.pd__price{font-size:22px;font-weight:700;margin:8px 0 2px}
.pd__price small{font-size:12px;font-weight:400;color:#666}
.pd__opt{font-size:13px;color:#444}
.pd__note{font-size:12px;color:#777;margin-bottom:18px}
details{border-top:1px solid #e8e8e8;padding:12px 0}
details:last-child{border-bottom:1px solid #e8e8e8}
summary{cursor:pointer;font-weight:700;font-size:14px;list-style:none;display:flex;justify-content:space-between}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-weight:400}
details[open] summary::after{content:"−"}
details p{font-size:13px;color:#444;margin-top:10px}
table{border-collapse:collapse;width:100%;font-size:13px;margin-top:10px}
th,td{border:1px solid #e3e3e3;padding:6px 4px;text-align:center}
th{background:#f6f6f6;font-weight:700}

/* tokushoho */
.law{max-width:760px;margin:0 auto;padding:32px 16px 72px}
.law h1{font-size:22px;margin-bottom:24px}
.law dl{border-top:1px solid #e8e8e8}
.law dt{font-weight:700;font-size:13px;padding:14px 0 2px;color:#555}
.law dd{font-size:14px;padding:0 0 14px;border-bottom:1px solid #e8e8e8;line-height:1.8}
.law .back{display:inline-block;margin-top:28px;text-decoration:underline;font-size:14px}