/* Trang dòng sản phẩm & hướng dẫn (sinh bởi pages.py). Cùng nhận diện với trang chủ:
   Deep Jade chủ đạo, Terracotta điểm nhấn, nền Ivory/Warm Sand, Cormorant Garamond + Manrope. */
:root{
  --jade:#174A43; --jade-d:#0f3631; --terra:#B85F45; --sand:#E8DCC8; --ink:#252923; --ivory:#F7F4ED;
  --mute:#5f655c; --line:rgba(37,41,35,.14); --btn-r:4px; --card-r:8px;
  --serif:"Cormorant Garamond",Georgia,serif; --sans:"Manrope",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{background:var(--ivory);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:1150px;margin:0 auto;padding:0 clamp(16px,5vw,48px)}

/* đầu trang */
.top{position:sticky;top:0;z-index:20;background:rgba(247,244,237,.96);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
.top .wrap{display:flex;align-items:center;gap:24px;min-height:72px}
.top .brand img{height:52px;width:auto}
.top nav{display:flex;gap:22px;margin-left:auto;font-size:13px;letter-spacing:.1em;text-transform:uppercase}
.top nav a{opacity:.8}
.top nav a:hover,.top nav a[aria-current]{opacity:1;color:var(--jade)}
.top nav a[aria-current]{box-shadow:0 2px 0 var(--terra)}
.top .call{background:var(--jade);color:var(--ivory);border-radius:var(--btn-r);padding:10px 16px;font-size:13px;font-weight:600;white-space:nowrap}
@media(max-width:900px){
  .top .wrap{flex-wrap:wrap;gap:0 16px}
  .top .call{margin-left:auto}
  .top nav{order:3;width:100%;margin:0;padding:2px 0 12px;gap:18px;font-size:12px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}
  .top nav::-webkit-scrollbar{display:none}
}

/* phần mở đầu */
.crumb{font-size:13px;color:var(--mute);padding-top:28px}
.crumb a:hover{color:var(--jade)}
.crumb span{margin:0 6px;opacity:.5}
.hero{padding-top:22px;padding-bottom:56px}
.kicker{font-size:12px;letter-spacing:.28em;text-transform:uppercase;color:var(--terra);font-weight:600}
h1{font-family:var(--serif);font-weight:500;font-size:clamp(38px,5vw,64px);line-height:1.06;margin-top:12px}
h1 i,h2 i{color:var(--jade)}
h1,h2,h3,.tile b{font-variant-numeric:lining-nums}   /* Cormorant mặc định số kiểu cổ (NP7oo) → số thẳng cho mã mẫu */
.lead{max-width:680px;color:var(--mute);font-size:17px;margin-top:18px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-block;padding:14px 24px;border-radius:var(--btn-r);font-size:13px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;transition:.2s;border:1px solid var(--jade)}
.btn.solid{background:var(--jade);color:var(--ivory)}
.btn.solid:hover{background:var(--jade-d)}
.btn.line{color:var(--jade)}
.btn.line:hover{background:var(--jade);color:var(--ivory)}

/* khối nội dung */
.sec{padding:56px 0;border-top:1px solid var(--line)}
.sec.sand{background:var(--sand);border-top:0}
h2{font-family:var(--serif);font-weight:500;font-size:clamp(30px,3.4vw,44px);line-height:1.1;margin-bottom:18px}
h3{font-family:var(--serif);font-weight:600;font-size:24px;line-height:1.2;margin:26px 0 8px}
.prose{max-width:760px}
.prose p+p{margin-top:12px}
.prose ul,.prose ol{margin:12px 0 0 22px}
.prose li+li{margin-top:6px}
.prose a{color:var(--jade);border-bottom:1px solid var(--terra)}
.cols2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:8px}
.card{background:#fff;border-radius:var(--card-r);padding:22px;box-shadow:0 1px 0 var(--line)}
.card h3{margin-top:0}
.card p{color:var(--mute);font-size:15px}

/* bảng quy cách */
table.spec{width:100%;max-width:760px;border-collapse:collapse;font-size:15px;margin-top:8px}
.spec th,.spec td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{font-weight:600;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute)}
.spec td{font-variant-numeric:lining-nums tabular-nums}

/* lưới mẫu */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:16px;margin-top:8px}
.tile{display:block;background:#fff;border-radius:var(--card-r);overflow:hidden;box-shadow:0 1px 0 var(--line);transition:transform .2s,box-shadow .2s}
.tile:hover{transform:translateY(-3px);box-shadow:0 14px 30px -18px rgba(37,41,35,.5)}
.tile .ph{aspect-ratio:3/4;background:#ece6dc;overflow:hidden}
.tile .ph img{width:100%;height:100%;object-fit:cover}
.tile .ph.studio img{object-fit:contain;padding:8px}
.tile .tx{padding:10px 12px 12px}
.tile b{display:block;font-family:var(--serif);font-size:19px;font-weight:600;line-height:1.15}
.tile small{display:block;color:var(--mute);font-size:12px;margin-top:3px}

/* trang từng mẫu: ảnh lớn + thông số */
.item{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(24px,4vw,56px);align-items:start;padding-top:22px;padding-bottom:56px}
.item > *{min-width:0}
.item .pic{display:block;background:#ece6dc;border-radius:var(--card-r);overflow:hidden}
.item .pic img{width:100%;height:auto;max-height:78vh;object-fit:contain}
.item .pic.studio img{padding:12px}
.item h1{font-size:clamp(34px,4vw,54px)}
.item .spec{margin-top:22px}
.item .spec th{width:38%;text-transform:none;letter-spacing:0;font-size:14px}
.item .spec a{color:var(--jade);border-bottom:1px solid var(--terra)}
@media(max-width:820px){.item{grid-template-columns:1fr}}
.item figure.pic{position:relative;margin:0}
.item figure.pic img{max-height:none;object-fit:cover;aspect-ratio:4/3;height:auto}
figcaption{position:absolute;right:10px;bottom:10px;font-size:11px;background:rgba(37,41,35,.55);color:#fff;padding:3px 8px;border-radius:3px}
a.card{display:block;transition:box-shadow .2s,transform .2s}
a.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px -18px rgba(37,41,35,.5)}

/* câu hỏi thường gặp */
.faq{max-width:760px}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--terra);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--mute);margin-top:10px}

/* công cụ tính */
.calc{background:#fff;border-radius:var(--card-r);padding:24px;max-width:760px;box-shadow:0 1px 0 var(--line)}
.calc .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}
.calc label{display:block;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--mute);margin-bottom:6px}
.calc input,.calc select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:var(--btn-r);font:inherit;background:var(--ivory)}
.calc .chk{display:flex;align-items:center;gap:8px;margin-top:14px;font-size:14px;text-transform:none;letter-spacing:0;color:var(--ink)}
.calc .chk input{width:auto}
.calc .out{margin-top:20px;padding:18px;border-radius:var(--btn-r);background:var(--sand)}
.calc .out b{font-family:var(--serif);font-size:34px;font-weight:600;color:var(--jade);font-variant-numeric:lining-nums}
.calc .out small{display:block;color:var(--mute);margin-top:6px}

/* liên hệ + chân trang */
.contact{background:var(--jade);color:var(--ivory);padding:56px 0}
.contact h2 i{color:var(--sand)}
.contact p{color:rgba(247,244,237,.8)}
.contact .btn.solid{background:var(--ivory);color:var(--jade);border-color:var(--ivory)}
.contact .btn.line{color:var(--ivory);border-color:rgba(247,244,237,.5)}
.contact .btn.line:hover{background:var(--ivory);color:var(--jade)}
.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.related a{border:1px solid var(--line);border-radius:var(--btn-r);padding:9px 14px;font-size:14px;background:#fff}
.related a:hover{border-color:var(--jade);color:var(--jade)}
footer{background:var(--ink);color:#b9bdb5;font-size:13px;padding:28px 0}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer nav{display:flex;flex-wrap:wrap;gap:16px}
footer a:hover{color:var(--ivory)}
.fab{position:fixed;right:calc(14px + env(safe-area-inset-right));bottom:calc(14px + env(safe-area-inset-bottom));z-index:30;width:56px;height:56px;border-radius:50%;background:#0068ff;color:#fff;display:grid;place-items:center;font-weight:600;font-size:13px;box-shadow:0 8px 24px rgba(0,0,0,.3)}