:root{--sage:#9da18f;--olive:#605e51;--ink:#4c4c4c;--muted:#7a7a7a;--bg:#FDFBF7;--line:#e6e2d8;--cream:#f7f4ee}
*{box-sizing:border-box}html,body{margin:0}body{font-family:"Mukta","Noto Sans TC",sans-serif;background:var(--bg);color:var(--ink);line-height:1.8;letter-spacing:.02em}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:18px 6vw;background:rgba(253,251,247,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.site-logo{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--olive);letter-spacing:.18em;text-transform:uppercase;font-size:.92rem}
.site-logo img{height:28px}
.site-nav{display:flex;gap:20px;list-style:none;margin:0;padding:0}
.site-nav a{font-size:.88rem;color:var(--muted)}.site-nav a:hover{color:var(--olive)}
.cart-link{position:relative;width:40px;height:40px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center}
.cart-link svg{width:18px;height:18px;fill:var(--olive)}
#shop_quantity{position:absolute;top:-6px;right:-6px;min-width:18px;height:18px;border-radius:9px;background:var(--sage);color:#fff;font-size:.7rem;display:flex;align-items:center;justify-content:center}
.hero-well{padding:72px 6vw 40px;text-align:center;background:linear-gradient(180deg,var(--cream),var(--bg))}
.hero-well .kicker{color:var(--sage);letter-spacing:.22em;text-transform:uppercase;font-size:.75rem;margin-bottom:14px}
.hero-well h1{margin:0 auto 14px;max-width:14ch;font-weight:500;font-size:clamp(2rem,5vw,3.2rem);color:var(--olive);line-height:1.25}
.hero-well p{margin:0 auto 28px;max-width:480px;color:var(--muted)}
.btn{display:inline-block;padding:12px 26px;border:1px solid var(--olive);background:var(--olive);color:#fff;cursor:pointer;letter-spacing:.06em}
.btn.outline{background:transparent;color:var(--olive)}
.chapter{padding:56px 6vw;border-top:1px solid var(--line);display:grid;grid-template-columns:200px 1fr 1fr;gap:28px;align-items:center}
.chapter .label{font-size:.75rem;letter-spacing:.2em;text-transform:uppercase;color:var(--sage)}
.chapter h2{margin:0 0 10px;font-weight:500;font-size:1.8rem;color:var(--olive)}
.chapter p{margin:0 0 16px;color:var(--muted)}
.chapter .price{font-size:1.25rem;color:var(--olive);font-weight:700;margin-bottom:14px}
.chapter img{max-height:240px;object-fit:contain;margin:0 auto;background:#fff;padding:18px;border:1px solid var(--line)}
.well-notes{padding:48px 6vw 64px;background:var(--cream);display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.well-notes div{background:#fff;border:1px solid var(--line);padding:22px}
.well-notes h3{margin:0 0 8px;color:var(--olive);font-weight:600}
.site-footer{background:var(--olive);color:#f3f0e8;padding:40px 6vw;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.site-footer a{color:#f3f0e8;margin-right:12px}
.page-hero{text-align:left;padding:56px 6vw 20px;background:var(--cream)}
.page-hero h1{color:var(--olive);font-weight:500}
.badge{color:var(--sage);border-bottom:1px solid var(--sage);padding:0 0 2px;background:transparent}
.detail-price,.cart-summary .total{color:var(--olive)}

.page-hero{padding:48px 5vw 24px}
.page-content{padding:24px 5vw 56px;max-width:820px}
.info-table,.spec-table{width:100%;border-collapse:collapse;margin:12px 0 18px}
.info-table td,.spec-table td{padding:10px 12px;border:1px solid var(--line, #ddd)}
.detail{display:grid;grid-template-columns:1fr 1.05fr;gap:32px;padding:32px 5vw 56px;max-width:1100px;margin:0 auto;align-items:start}
.detail-img{padding:24px;background:#fff;border:1px solid var(--line,#ddd);align-self:start;height:fit-content}
.detail-img img{max-height:380px;object-fit:contain;margin:0 auto;display:block}
.detail h1{margin:8px 0 4px}
.detail h2{margin:0 0 14px;font-size:1rem;font-weight:500;opacity:.7}
.warning{padding:12px 14px;margin-bottom:14px;font-size:.92rem;background:#fff7e8;border-left:3px solid #d4a017}
.detail-price{font-size:1.5rem;font-weight:800;margin:8px 0 14px}
.qty-row{display:inline-flex;border:1px solid var(--line,#ddd);margin:0 10px 14px 0;background:#fff}
.qty-row button,.qty-btn{width:40px;height:40px;border:0;background:#f5f5f5;cursor:pointer}
.qty-row input{width:48px;height:40px;border:0;text-align:center}
.related{margin-top:18px;display:flex;gap:14px;flex-wrap:wrap}
.breadcrumb{list-style:none;display:flex;gap:8px;padding:0;margin:0 0 12px;font-size:.88rem;opacity:.7;flex-wrap:wrap}
.breadcrumb li::after{content:"/";margin-left:8px;opacity:.5}.breadcrumb li:last-child::after{content:""}
.badge{display:inline-block;font-size:.72rem;padding:3px 10px;margin-bottom:8px}
.note{margin-top:14px;opacity:.75;font-size:.95rem}
.article-cover img{width:100%;max-height:260px;object-fit:contain;background:#fff;margin-bottom:14px}
.cta-wrap{margin-top:24px}
.cart-page{padding:40px 5vw 56px;max-width:920px;margin:0 auto}
.cart-empty,.cart-item{background:#fff;border:1px solid var(--line,#ddd);padding:18px;margin-bottom:12px}
.cart-empty{text-align:center;padding:48px}
.cart-item{display:grid;grid-template-columns:80px 1fr auto auto auto;gap:14px;align-items:center}
.cart-item img{width:80px;height:80px;object-fit:contain}
.cart-summary{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:flex-end;margin-top:16px}
.cart-summary .total{margin-right:auto;font-size:1.25rem;font-weight:800}
@media(max-width:900px){.detail{grid-template-columns:1fr}.cart-item{grid-template-columns:70px 1fr}}

@media(max-width:900px){.chapter,.well-notes{grid-template-columns:1fr}}


/* sticky footer for short pages (product/cart) */
html{height:100%}
body{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}
body > .site-header, body > header{flex:0 0 auto;width:100%}
body > .page-hero, body > section, body > .product-shell, body > .detail, body > .page-content, body > main{flex:0 0 auto;width:100%}
body > .site-footer-outer{flex:1 0 auto;width:100%;display:flex;flex-direction:column;justify-content:flex-end;background:var(--olive,#605e51)}
body > .site-footer, body > footer.site-footer{margin-top:auto;width:100%;flex:0 0 auto}

/* layout polish */
@media(max-width:900px){
  .chapter{grid-template-columns:1fr !important;gap:16px !important}
  .well-notes{grid-template-columns:1fr !important}
  .hero-well{padding:48px 16px 32px !important}
  .hero-well h1{max-width:none !important}
}