/* ============================================================
   軽量・モバイル最優先スタイル（外部フォント不使用＝高速・プライバシー配慮）
   ============================================================ */
:root{
  --c-primary:#0f766e;      /* teal 700 */
  --c-primary-dark:#115e59;
  --c-text:#1f2937;
  --c-muted:#6b7280;
  --c-line:#e5e7eb;
  --c-bg:#ffffff;
  --c-bg-soft:#f8fafc;
  --c-accent:#f59e0b;
  --radius:10px;
  --maxw:960px;
  --gap:16px;
  --font: system-ui,-apple-system,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
}
*{box-sizing:border-box}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--c-text);background:var(--c-bg);line-height:1.75;word-break:normal;overflow-wrap:anywhere}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.4;color:#111827}
h1{font-size:1.6rem;margin:.2em 0 .6em}
h2{font-size:1.3rem;margin:1.6em 0 .6em;padding-bottom:.3em;border-bottom:2px solid var(--c-line)}
h3{font-size:1.1rem;margin:1.2em 0 .4em}
p{margin:.6em 0}
ul,ol{padding-left:1.2em}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-primary);color:#fff;padding:8px 12px;z-index:100}
.skip-link:focus{left:8px;top:8px}

/* Age gate */
.age-gate{position:fixed;inset:0;z-index:1000;background:rgba(255,255,255,.98);display:flex;align-items:center;justify-content:center;padding:20px}
.age-gate-box{max-width:420px;text-align:center;border:1px solid var(--c-line);border-radius:var(--radius);padding:28px 22px;background:#fff;box-shadow:0 12px 34px rgba(0,0,0,.14)}
.age-gate-box img{margin:0 auto 6px}
.age-gate-box h2{border:none;margin:.2em 0 .4em}
.age-gate-actions{display:flex;gap:10px;justify-content:center;margin:16px 0 8px;flex-wrap:wrap}
.age-gate-note{color:var(--c-muted);font-size:.8rem;margin:.6em 0 0}

/* Header / nav */
.site-header{border-bottom:1px solid var(--c-line);background:var(--c-bg);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:56px}
.brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:1.2rem;color:#111827;letter-spacing:.01em}
.brand:hover{text-decoration:none}
.brand-logo{height:34px;width:auto;display:block}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;font-size:1.5rem;background:none;border:1px solid var(--c-line);border-radius:8px;cursor:pointer;color:var(--c-text)}
.nav-menu{display:none;list-style:none;margin:0;padding:0}
.nav-menu.open{display:block;position:absolute;left:0;right:0;top:56px;background:var(--c-bg);border-bottom:1px solid var(--c-line);box-shadow:0 8px 16px rgba(0,0,0,.06)}
.nav-menu.open li{border-top:1px solid var(--c-line)}
.nav-menu a{display:block;padding:14px 16px;color:var(--c-text)}

/* Breadcrumb */
.breadcrumb{background:var(--c-bg-soft);border-bottom:1px solid var(--c-line);font-size:.85rem}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:.3em;margin:0;padding:8px 0}
.breadcrumb li:not(:first-child)::before{content:"›";margin:0 .4em;color:var(--c-muted)}
.breadcrumb [aria-current="page"]{color:var(--c-muted)}

/* Main */
.main-content{padding:20px 16px 48px;min-height:60vh}
.lead{font-size:1.05rem;color:#374151}
.meta-line{color:var(--c-muted);font-size:.85rem}

/* Buttons */
.btn{display:inline-block;background:var(--c-primary);color:#fff;padding:12px 22px;border-radius:var(--radius);font-weight:600;min-height:44px}
.btn:hover{background:var(--c-primary-dark);text-decoration:none}

/* Hero */
.hero{padding:8px 0 8px}
.hero .lead{margin-bottom:1em}
.hero-media{margin:0 -16px 16px;background:linear-gradient(135deg,#0f766e,#0e7490)}
.hero-media img{width:100%;height:auto;display:block}
.hero-body h1{margin-top:0}

/* Feature badges */
.feature-badges{list-style:none;padding:0;margin:14px 0;display:flex;flex-wrap:wrap;gap:8px}
.feature-badges li{background:var(--c-bg-soft);border:1px solid var(--c-line);color:#0f766e;font-weight:600;font-size:.82rem;padding:6px 12px;border-radius:999px}

/* Product hero (detail) */
.product-hero{display:block}
.product-main-img{width:100%;max-width:520px;margin:0 auto;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-bg-soft)}
.product-tagline{font-size:1.05rem;color:#0f766e;font-weight:600;margin:.2em 0 .6em}
.product-brand{color:var(--c-muted);font-size:.85rem;letter-spacing:.04em;margin:0}
.product-price-tbd{color:var(--c-muted);font-weight:600}
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;align-items:center}
.ecwid-buybtn{margin:16px 0 4px;max-width:520px}
.shop-all-link{font-size:.9rem;color:var(--c-primary-dark)}
.btn-ghost{background:transparent;color:var(--c-primary-dark);border:1px solid var(--c-primary)}
.btn-ghost:hover{background:var(--c-bg-soft)}

/* Flavor text list (multi-flavor devices) */
.flavor-text-list{margin:1em 0;padding-left:1.1em;display:grid;gap:6px}
.flavor-text-list li{font-size:.92rem}
@media (min-width:768px){.flavor-text-list{grid-template-columns:1fr 1fr;column-gap:24px}}

/* Product banners */
.product-banners{margin:24px 0;display:flex;flex-direction:column;gap:16px}
.product-banners img{width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--c-line)}

/* Flavor gallery */
.flavor-gallery{list-style:none;padding:0;margin:1em 0;display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.flavor-card{border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;background:var(--c-bg);text-align:center}
.flavor-card img{width:100%;aspect-ratio:1/1;object-fit:cover;background:var(--c-bg-soft)}
.flavor-name{display:block;font-weight:700;padding:10px 8px 2px}
.flavor-note{display:block;color:var(--c-muted);font-size:.8rem;padding:0 8px 12px}

/* Product grid */
.product-grid{list-style:none;padding:0;margin:1em 0;display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.product-card a{display:block;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;background:var(--c-bg);color:var(--c-text)}
.product-card a:hover{text-decoration:none;box-shadow:0 4px 12px rgba(0,0,0,.08)}
.product-card img{aspect-ratio:1/1;object-fit:cover;background:var(--c-bg-soft)}
.product-name{display:block;padding:10px 12px;font-weight:600}
.product-model{display:block;padding:0 12px 12px;color:var(--c-muted);font-size:.8rem}

/* Cards */
.link-cards{list-style:none;padding:0;display:grid;grid-template-columns:1fr;gap:12px}
.link-cards a{display:block;padding:16px;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-bg-soft)}
.link-cards a:hover{text-decoration:none;border-color:var(--c-primary)}
.link-cards strong{display:block}
.link-cards span{color:var(--c-muted);font-size:.9rem}

.empty-state{padding:24px;background:var(--c-bg-soft);border:1px dashed var(--c-line);border-radius:var(--radius);text-align:center;color:var(--c-muted)}

/* Brand section */
.brand-cards{list-style:none;padding:0;display:grid;gap:12px;grid-template-columns:1fr}
.brand-cards a{display:block;padding:16px;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-bg)}
.brand-cards a:hover{text-decoration:none;border-color:var(--c-primary);box-shadow:0 4px 12px rgba(0,0,0,.06)}
.brand-cards strong{display:block;color:var(--c-primary-dark);font-size:1.05rem}
.brand-cards span{color:var(--c-muted);font-size:.9rem}

/* Points section */
.point-cards{list-style:none;padding:0;display:grid;gap:12px;grid-template-columns:1fr 1fr}
.point-cards li{padding:16px;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-bg-soft)}
.point-cards strong{display:block;color:#111827}
.point-cards span{color:var(--c-muted);font-size:.88rem}

/* Steps section */
.step-list{list-style:none;padding:0;display:grid;gap:10px;counter-reset:none}
.step-list li{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:12px;align-items:center;padding:12px 16px;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-bg)}
.step-n{grid-row:1 / span 2;display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:var(--c-primary);color:#fff;font-weight:700}
.step-list strong{align-self:end}
.step-d{color:var(--c-muted);font-size:.85rem;align-self:start}
@media (min-width:768px){
  .brand-cards{grid-template-columns:repeat(3,1fr)}
  .point-cards{grid-template-columns:repeat(4,1fr)}
  .step-list{grid-template-columns:repeat(5,1fr)}
  .step-list li{grid-template-columns:1fr;grid-template-rows:auto auto auto;justify-items:center;text-align:center;row-gap:6px}
  .step-n{grid-row:auto}
}

/* Product detail */
.product-detail{max-width:100%}
.product-gallery img{border:1px solid var(--c-line);border-radius:var(--radius)}
.thumb-list{list-style:none;display:flex;gap:8px;padding:0;margin:10px 0}
.thumb-list img{width:64px;height:64px;object-fit:cover;border:1px solid var(--c-line);border-radius:8px}
.product-price{font-size:1.4rem;font-weight:700;color:var(--c-primary-dark)}
.product-stock.in{color:#047857}.product-stock.out{color:#b91c1c}
.product-specs table{width:100%;border-collapse:collapse}
.product-specs th,.product-specs td{border:1px solid var(--c-line);padding:10px;text-align:left;vertical-align:top}
.product-specs th{background:var(--c-bg-soft);width:34%;white-space:nowrap}
.product-cautions{background:#fff7ed;border:1px solid #fed7aa;border-radius:var(--radius);padding:12px 16px}
.product-cautions h2{border:none;color:#b45309}

/* FAQ */
.faq-item{border:1px solid var(--c-line);border-radius:var(--radius);margin:10px 0;background:var(--c-bg)}
.faq-item summary{padding:14px 16px;font-weight:600;cursor:pointer;min-height:44px;display:flex;align-items:center}
.faq-answer{padding:0 16px 14px}
.related-links ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.related-links a{display:inline-block;padding:8px 14px;background:var(--c-bg-soft);border:1px solid var(--c-line);border-radius:20px;font-size:.9rem}

/* Order page */
.order-steps{list-style:none;padding:0;display:grid;gap:12px;margin:1em 0}
.order-steps li{border:1px solid var(--c-line);border-radius:var(--radius);padding:12px 16px;background:var(--c-bg-soft)}
.order-steps strong{display:block;color:var(--c-primary-dark)}
.order-steps span{color:var(--c-muted);font-size:.9rem}
.order-form{display:grid;gap:12px;max-width:520px;margin:1em 0}
.order-form label{display:grid;gap:4px;font-size:.9rem;font-weight:600}
.order-form input,.order-form select,.order-form textarea{padding:10px;border:1px solid var(--c-line);border-radius:8px;font:inherit;font-weight:400;min-height:44px}
.order-form textarea{min-height:auto}
.order-form .checkbox{display:flex;align-items:center;gap:8px;font-weight:400}
.order-form .checkbox input{min-height:auto;width:18px;height:18px}
.order-payment ul{list-style:none;padding:0;display:grid;gap:8px}
.order-payment li{border:1px solid var(--c-line);border-radius:8px;padding:10px 14px;background:var(--c-bg-soft)}
@media (min-width:600px){.order-steps{grid-template-columns:repeat(3,1fr)}}

/* Footer */
.site-footer{border-top:1px solid var(--c-line);background:var(--c-bg-soft);padding:24px 0;margin-top:32px}
.footer-nav ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:14px;margin:0 0 12px}
.footer-nav a{color:var(--c-muted);font-size:.88rem}
.copyright{color:var(--c-muted);font-size:.82rem;margin:0}

/* Desktop */
@media (min-width:768px){
  h1{font-size:2rem}
  .nav-toggle{display:none}
  .nav-menu{display:flex;gap:4px}
  .nav-menu a{padding:10px 14px;border-radius:8px}
  .nav-menu a:hover{background:var(--c-bg-soft);text-decoration:none}
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .link-cards{grid-template-columns:repeat(2,1fr)}
  .product-hero{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
  .product-main-img{max-width:100%}
  .flavor-gallery{grid-template-columns:repeat(5,1fr)}
  .hero-media{margin:0 0 16px;border-radius:var(--radius);overflow:hidden}
}
@media (min-width:480px) and (max-width:767px){
  .flavor-gallery{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:600px) and (max-width:767px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
}