/* ===== Thiết kế: biến, nền tảng ===== */
:root{
--brand:#1f6f5c;--brand-d:#165244;--brand-l:#e6f2ee;--accent:#d9822b;--accent-d:#a8600f;--accent-l:#fdf1e3;
--ink:#1c2630;--muted:#5a6672;--line:#e2e8ec;--soft:#f4f7f6;--bg:#fff;--card:#fff;--star:#c27c0e;--danger:#b42318;
--r-s:6px;--r:12px;--r-l:18px;
--sh-1:0 1px 2px rgba(20,40,35,.06),0 1px 3px rgba(20,40,35,.08);
--sh-2:0 6px 18px rgba(20,40,35,.10),0 2px 6px rgba(20,40,35,.06);
--sp:16px;--max:1180px;
--serif:Georgia,"Iowan Old Style","Palatino Linotype",Palatino,"Times New Roman",serif;
--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
--ring:0 0 0 3px rgba(31,111,92,.35)}
@media(prefers-color-scheme:dark){:root{
--brand:#4fb89b;--brand-d:#3a9e82;--brand-l:#173129;--accent:#f0a24e;--accent-d:#f4b673;--accent-l:#33261a;
--ink:#e8edf0;--muted:#9fabb5;--line:#2c3740;--soft:#182128;--bg:#11181d;--card:#1a242b;--star:#f0b44c;--danger:#ff8b7e;
--sh-1:0 1px 2px rgba(0,0,0,.4);--sh-2:0 8px 22px rgba(0,0,0,.5);--ring:0 0 0 3px rgba(79,184,155,.45)}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font:16px/1.65 var(--sans);color:var(--ink);background:var(--bg);overflow-wrap:break-word}
a{color:var(--brand)}
a:hover{color:var(--brand-d)}
img{max-width:100%;height:auto}
h1,h2,h3{font-family:var(--serif);color:var(--ink)}
h1{font-size:1.7rem;line-height:1.25;margin:.3em 0 .45em;letter-spacing:-.01em}
h2{font-size:1.3rem;margin:1.6em 0 .6em;line-height:1.3}
h3{font-size:1rem;margin:.4em 0;line-height:1.35}
p{margin:.5em 0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:var(--ring);border-radius:4px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--sp)}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:var(--card);padding:8px 12px;z-index:99;border-radius:var(--r-s)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--muted);font-size:.92rem}
.lead{color:var(--muted);font-size:1.05rem}
[hidden]{display:none!important}

/* ===== Nút, form, badge ===== */
.btn,.filters button,.search button,.hero-search button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border:1.5px solid var(--brand);border-radius:999px;background:var(--brand);color:#fff;font:600 .95rem/1.2 var(--sans);text-decoration:none;cursor:pointer;transition:background .15s,transform .15s,box-shadow .15s}
.btn:hover,.filters button:hover,.search button:hover,.hero-search button:hover{background:var(--brand-d);border-color:var(--brand-d);color:#fff;box-shadow:var(--sh-1)}
.btn:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--brand)}
.btn-ghost:hover{background:var(--brand-l);color:var(--brand-d);border-color:var(--brand)}
.btn-lg{padding:13px 26px;font-size:1.02rem}
.btn-sm,.filters button{padding:8px 16px;font-size:.9rem}
.btn-block{display:flex;width:100%}
@media(prefers-color-scheme:dark){.btn,.filters button,.search button,.hero-search button{color:#0c1a15}.btn:hover,.filters button:hover,.search button:hover,.hero-search button:hover{color:#0c1a15}.btn-ghost{color:var(--brand)}.btn-ghost:hover{color:var(--brand)}}
.btn-link{background:none;border:0;color:var(--danger);font:inherit;font-size:.9rem;cursor:pointer;text-decoration:underline;padding:4px}
input,select,textarea{font:inherit;color:var(--ink);background:var(--card)}
.fld{margin:0 0 14px}
.fld label{display:block;font-weight:600;margin-bottom:4px;font-size:.93rem}
.fld input,.fld textarea,.fld select,.filters select,.filters input{width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:var(--r-s);transition:border-color .15s}
.fld .chk{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:500;cursor:pointer}
.fld .chk input{width:22px;height:22px;flex:none;padding:0;accent-color:var(--brand)}
.fld input:focus,.fld textarea:focus,.fld select:focus,.filters select:focus,.filters input:focus{outline:none;border-color:var(--brand);box-shadow:var(--ring)}
.err{color:var(--danger);font-size:.9rem;min-height:0}
.badge{display:inline-block;padding:3px 12px;border-radius:999px;background:var(--brand-l);color:var(--brand-d);font-size:.85rem;font-weight:600}
.badge-alt{background:var(--accent-l);color:var(--accent-d)}
@media(prefers-color-scheme:dark){.badge{color:var(--brand)}}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-top:20px;box-shadow:var(--sh-1)}
.panel>h2:first-child,.panel>h1:first-child{margin-top:0}

/* ===== Header ===== */
.hd{position:sticky;top:0;z-index:50;background:var(--card);border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.hd-row{display:flex;align-items:center;gap:10px 14px;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}
.logo{display:inline-flex;align-items:center;gap:8px;font:700 1.2rem var(--serif);text-decoration:none;color:var(--brand);margin-right:auto}
.logo:hover{color:var(--brand-d)}
.menu-btn{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1.5px solid var(--line);border-radius:var(--r-s);background:var(--card);color:var(--ink);cursor:pointer}
.js .menu-btn{display:inline-flex}
.search{order:5;flex:1 1 100%;display:flex;gap:0;margin:0}
.search input{flex:1;min-width:0;padding:9px 14px;border:1.5px solid var(--line);border-right:0;border-radius:999px 0 0 999px;background:var(--soft)}
.search input:focus{outline:none;border-color:var(--brand);background:var(--card)}
.search button{border-radius:0 999px 999px 0;padding:9px 16px}
.search button span{display:none}
.icon-link{position:relative;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;color:var(--ink);text-decoration:none}
.icon-link:hover{background:var(--brand-l);color:var(--brand)}
.cart-count{position:absolute;top:0;right:-2px;min-width:20px;height:20px;padding:0 5px;border-radius:999px;background:var(--accent);color:#1a1209;font:700 .72rem/20px var(--sans);text-align:center}
.mainnav{border-top:1px solid var(--line);background:var(--card)}
.mainnav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0 4px}
.mainnav a{display:block;padding:10px 12px;color:var(--ink);text-decoration:none;font-weight:500;font-size:.95rem;border-bottom:2px solid transparent}
.mainnav a:hover{color:var(--brand);border-bottom-color:var(--brand)}
.mainnav li{position:relative}
.sub{list-style:none;margin:0;padding:0 0 0 14px}
.sub-toggle{display:none;align-items:center;justify-content:center;gap:6px;min-width:44px;min-height:44px;border:0;background:none;color:var(--ink);cursor:pointer;font:inherit;font-weight:500;font-size:.95rem}
.sub-toggle[aria-expanded=true] svg{transform:rotate(180deg)}
.js .sub-toggle{display:inline-flex}
.js .sub-main{display:flex;width:100%;justify-content:space-between;padding:0 12px}
.nav-cats-label{padding:10px 12px;font-weight:600}
.js .nav-cats > .nav-cats-label{display:none}
.has-sub>.sub-toggle:not(.sub-main){position:absolute;top:0;right:0}
.js .has-sub>a{padding-right:48px}
.js .has-sub>.sub{display:none}
.js .has-sub.open>.sub{display:block}
.js .mainnav{display:none}
.js .mainnav.open{display:block}
.js .mainnav.open .nav-list{flex-direction:column;padding:6px 0}
@media(min-width:900px){
.hd-row{flex-wrap:nowrap}
.search{order:0;flex:0 1 380px;margin-left:auto}
.logo{margin-right:0}
.js .menu-btn{display:none}
.js .mainnav,.js .mainnav.open{display:block}
.js .mainnav.open .nav-list,.nav-list{flex-direction:row;padding:0}
.js .sub-main{width:auto;padding:10px 12px}
.js .nav-cats>.sub{position:absolute;left:0;top:100%;min-width:230px;max-height:70vh;overflow:auto;padding:6px 0;background:var(--card);border:1px solid var(--line);border-radius:var(--r-s);box-shadow:var(--sh-1);z-index:60}
.js .nav-cats.hov>.sub,.js .nav-cats.open>.sub{display:block}
.sub .sub{padding-left:14px}
.search button span{display:inline}}

/* ===== Footer ===== */
main{min-height:60vh;padding-bottom:40px}
.ft{margin-top:24px;background:var(--soft);border-top:1px solid var(--line);padding:36px 0 18px;font-size:.93rem;color:var(--muted)}
.ft-grid{display:grid;gap:24px;grid-template-columns:1fr 1fr}
.ft-grid>div:first-child{grid-column:1/-1}
.ft-title{font:700 1rem var(--serif);color:var(--ink);margin:0 0 8px}
.ft ul{list-style:none;margin:0;padding:0}
.ft li{margin:5px 0}
.ft a{color:var(--muted);text-decoration:none}
.ft a:hover{color:var(--brand);text-decoration:underline}
.ft-copy{margin:28px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:.85rem}
@media(min-width:760px){.ft-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}.ft-grid>div:first-child{grid-column:auto}}

/* ===== Breadcrumb, tiêu đề trang ===== */
.crumbs{margin-top:16px;font-size:.88rem;color:var(--muted)}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand);text-decoration:underline}
.crumbs li+li::before{content:"›";margin:0 8px;opacity:.6}
.page-hd{margin:14px 0 8px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.page-hd h1{margin-top:.2em}
.page-hd .lead{margin:.2em 0;max-width:46rem}
.sec-t{position:relative;padding-left:14px}
.sec-t::before{content:"";position:absolute;left:0;top:.15em;bottom:.15em;width:4px;border-radius:4px;background:var(--accent)}
.more{text-align:right;font-weight:600}

/* ===== Trang chủ ===== */
.hero{margin-top:18px;padding:32px 20px;border-radius:var(--r-l);background:linear-gradient(135deg,var(--brand-l),var(--accent-l));border:1px solid var(--line);text-align:center}
.hero h1{font-size:1.75rem;margin:0 0 .3em}
.hero .lead{max-width:40rem;margin:0 auto}
.hero-search{display:flex;max-width:560px;margin:20px auto 0;box-shadow:var(--sh-2);border-radius:999px}
.hero-search input{flex:1;min-width:0;padding:14px 20px;border:1.5px solid var(--line);border-right:0;border-radius:999px 0 0 999px;font-size:1rem}
.hero-search input:focus{outline:none;border-color:var(--brand)}
.hero-search button{border-radius:0 999px 999px 0;padding:0 24px}
.cats{display:grid;gap:14px;grid-template-columns:1fr}
.cat{background:var(--card);border:1px solid var(--line);border-top:3px solid var(--brand);border-radius:var(--r);padding:14px 18px;box-shadow:var(--sh-1);transition:transform .15s,box-shadow .15s}
.cat:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.cat h3{font-size:1.08rem;margin:0 0 4px}
.cat h3 a{text-decoration:none}
.count{display:inline-block;min-width:24px;padding:0 8px;border-radius:999px;background:var(--brand-l);color:var(--brand-d);font:600 .78rem/22px var(--sans);text-align:center;vertical-align:middle}
@media(prefers-color-scheme:dark){.count{color:var(--brand)}}
.cat ul{margin:.3em 0 0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.92rem}

/* ===== Lưới & thẻ sách ===== */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s,box-shadow .18s,border-color .18s}
.card:hover,.card:focus-within{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--brand)}
.card-cover{display:block;text-decoration:none;background:var(--soft);padding:12px 12px 0}
.card .cover{box-shadow:0 4px 12px rgba(0,0,0,.18)}
.card-body{padding:10px 12px 14px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:.98rem;margin:0 0 2px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a::after{content:"";position:absolute;inset:0}
.card{position:relative}
.card h3 a:hover{color:var(--brand)}
.card p{margin:.15em 0}
.card-au a{position:relative;z-index:1;color:var(--muted)}
.card-price{margin-top:auto!important;padding-top:6px}
.cover{display:block;width:100%;height:auto;aspect-ratio:2/3;object-fit:cover;background:var(--soft);border-radius:4px}
.cover-fallback{display:flex;align-items:center;justify-content:center;background:var(--brand-l) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231f6f5c' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 5.5A2.5 2.5 0 0 1 6.5 3H20v15H6.5A2.5 2.5 0 0 0 4 20.5z'/%3E%3Cpath d='M4 20.5A2.5 2.5 0 0 0 6.5 23H20v-5M9 7.5h7'/%3E%3C/svg%3E") center/32% no-repeat;font-size:0;color:transparent}
.cover.ph{display:flex;align-items:center;justify-content:center;font:700 3rem var(--serif);color:var(--brand);background:var(--brand-l)}
.price{font-weight:700;color:var(--brand-d);font-size:1.05rem}
@media(prefers-color-scheme:dark){.price{color:var(--brand)}}
.old{color:var(--muted);font-size:.88em;font-weight:400}
@media(min-width:600px){.grid{grid-template-columns:repeat(3,1fr);gap:18px}.cats{grid-template-columns:repeat(2,1fr)}h1{font-size:2rem}.hero h1{font-size:2.2rem}.hero{padding:48px 32px}}
@media(min-width:900px){.grid{grid-template-columns:repeat(4,1fr);gap:22px}.cats{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1100px){.grid{grid-template-columns:repeat(5,1fr)}}

/* ===== Chip, lọc, sắp xếp, phân trang ===== */
.chips{list-style:none;padding:0;margin:.8em 0;display:flex;flex-wrap:wrap;gap:8px}
.chips a,.chips span{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:999px;font-size:.9rem;text-decoration:none;background:var(--card);transition:background .15s,border-color .15s}
.chips a:hover{background:var(--brand-l);border-color:var(--brand)}
.filters{display:flex;flex-wrap:wrap;gap:10px 12px;align-items:end;margin:16px 0;padding:14px;background:var(--soft);border:1px solid var(--line);border-radius:var(--r)}
.filters label{display:flex;flex-direction:column;font-size:.85rem;font-weight:600;gap:4px;flex:1 1 140px}
.filters input[type=number]{width:100%}
.filters .clear{font-size:.9rem;align-self:center}
.bar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 16px;margin:14px 0}
.bar p{margin:0}
.sorts{font-size:.92rem;color:var(--muted)}
.sorts a,.sorts strong{display:inline-block;padding:3px 10px;border-radius:999px;text-decoration:none}
.sorts strong{background:var(--brand);color:#fff}
@media(prefers-color-scheme:dark){.sorts strong{color:#0c1a15}}
.sorts a:hover{background:var(--brand-l)}
.pager{display:flex;flex-wrap:wrap;gap:6px;margin:28px 0;justify-content:center}
.pager a,.pager span{min-width:42px;text-align:center;padding:9px 14px;border:1px solid var(--line);border-radius:var(--r-s);text-decoration:none;background:var(--card);color:var(--ink)}
.pager a:hover{border-color:var(--brand);color:var(--brand)}
.pager .cur{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:700}
@media(prefers-color-scheme:dark){.pager .cur{color:#0c1a15}}
.empty{padding:28px;border:1.5px dashed var(--line);border-radius:var(--r);color:var(--muted);text-align:center;background:var(--soft)}

/* ===== Trang sách ===== */
.book{display:grid;gap:22px;margin-top:16px}
.book-cover{max-width:280px;width:100%;margin:0 auto}
.book-cover .cover{border-radius:var(--r-s);box-shadow:var(--sh-2)}
.book-info h1{margin-top:0}
.facts{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;margin:1em 0;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.facts:not(:has(dt)){display:none}
.facts dt{color:var(--muted)}
.facts dd{margin:0}
.buy{font-size:1.7rem;margin:.4em 0}
.buy .price{font-size:1.7rem}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.perks{list-style:none;margin:10px 0;padding:0;font-size:.9rem;color:var(--muted)}
.perks li::before{content:"✓";color:var(--brand);font-weight:700;margin-right:8px}
#cart-msg{min-height:1.4em}
@media(min-width:760px){.book{grid-template-columns:320px 1fr;gap:40px;align-items:start}.book-cover{margin:0;position:sticky;top:130px}}
.stars{color:var(--star);letter-spacing:1px}
.rv-grid{display:grid;gap:14px}
.rv{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--r);padding:14px 18px;box-shadow:var(--sh-1)}
.rv-t{font-size:1.05rem;margin:0 0 4px}
.rv-t a{text-decoration:none}
.rv p{margin:.3em 0}
@media(min-width:760px){.rv-grid{grid-template-columns:1fr 1fr}}
.review{max-width:720px;margin:0 auto}
.review p{font-size:1.06rem;line-height:1.8}
.review .meta{font-size:.95rem}
.about{max-width:720px;margin-left:auto;margin-right:auto}
.mini{display:flex;gap:16px;align-items:flex-start}
.mini .cover{width:84px}
.mini-t{font:700 1.05rem var(--serif)}

/* ===== Đọc online ===== */
.toc{padding:14px 20px 14px 44px}
.toc li{padding:8px 0;border-bottom:1px solid var(--line)}
.toc li:last-child{border:0}
.toc a{font-weight:600;text-decoration:none}
.toc a:hover{text-decoration:underline}
#resume{margin:14px 0}
.reader{max-width:42rem;margin-left:auto;margin-right:auto;--rd-size:1.125rem;--rd-bg:transparent;--rd-fg:var(--ink);margin-top:10px;padding:6px 0 0}
.reader[data-theme=sepia]{--rd-bg:#f4ecd8;--rd-fg:#3b2f1e}
.reader[data-theme=dark]{--rd-bg:#14191d;--rd-fg:#d9dfe3}
.reader[data-theme]{background:var(--rd-bg);color:var(--rd-fg);border-radius:var(--r);padding:12px 16px 16px}
.reader[data-theme] h1,.reader[data-theme] .muted,.reader[data-theme] .muted a{color:var(--rd-fg)}
.reader[data-theme] a{color:inherit}
.rd-tools{display:flex;justify-content:flex-end;gap:6px;margin:0 0 6px}
.rd-tools button{min-width:44px;padding:6px 12px;border:1px solid var(--line);border-radius:var(--r-s);background:var(--card);color:var(--ink);font:600 .9rem var(--sans);cursor:pointer}
.rd-tools button:hover{border-color:var(--brand);color:var(--brand)}
.chapter{margin:0}
.chapter h1{font-size:1.6rem;margin-bottom:.8em}
.chapter p{margin:0 0 1.15em;font:var(--rd-size)/1.85 var(--serif)}
.chapter .muted,.chapter .empty{font-family:var(--sans)}
.chapter .muted{font-size:.9rem}
.chap-nav{margin:24px 0;justify-content:space-between;align-items:stretch}
.chap-nav a{flex:0 1 auto;max-width:100%;font-size:.9rem;border-radius:var(--r)}
.chap-nav a[rel=next]{text-align:right}
nav.pager{justify-content:space-between}

/* ===== Giỏ hàng, đặt mua, tra cứu ===== */
.tbl-wrap{overflow-x:auto}
.cart{width:100%;border-collapse:collapse;background:var(--card)}
.cart th{font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.cart th,.cart td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.cart .c-title a{font-weight:600;text-decoration:none}
.qty{display:inline-flex;align-items:center;gap:4px}
.qty-btn{width:44px;height:44px;border:1.5px solid var(--line);border-radius:var(--r-s);background:var(--card);color:var(--ink);font:600 1.1rem/1 var(--sans);cursor:pointer}
.qty-btn:hover{border-color:var(--brand);color:var(--brand)}
.cart input[type=number]{width:3.6em;text-align:center;padding:7px;border:1.5px solid var(--line);border-radius:var(--r-s)}
.cart-total{font-size:1.1rem}
.cart-layout,.co-layout{display:grid;gap:20px;margin-top:16px}
.summary{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh-1);align-self:start}
.summary h2{margin:0 0 12px;font-size:1.15rem}
.coupon-row{display:flex;gap:8px}.coupon-row input{flex:1;min-width:0;min-height:44px;text-transform:uppercase}.coupon-row .btn{min-height:44px;flex:none}.ok-msg{margin-top:4px;font-size:.9rem}
.sum-row{display:flex;justify-content:space-between;gap:12px;margin:8px 0}
.sum-total{border-top:1px solid var(--line);padding-top:12px;margin-top:12px;font-size:1.15rem}
.sum-total strong{color:var(--brand-d)}
@media(prefers-color-scheme:dark){.sum-total strong{color:var(--brand)}}
.sum-note{margin-top:12px;text-align:center}
.co-items{list-style:none;margin:0;padding:0}
.co-items li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-size:.95rem}
#co-form h2{margin:0 0 14px;font-size:1.15rem}
#co-root .panel{margin-top:0}
.lookup{max-width:30rem}
.order .cart-total{text-align:right}
.done{max-width:560px;margin:32px auto;text-align:center}
.done-ic{color:var(--brand)}
.order-code{display:inline-block;margin:4px 0;padding:6px 18px;border-radius:var(--r-s);background:var(--brand-l);color:var(--brand-d);font-size:1.4rem;letter-spacing:.06em}
@media(prefers-color-scheme:dark){.order-code{color:var(--brand)}}
.done .actions{justify-content:center}
.errpage{text-align:center;padding:48px 0}
.errpage .chips{justify-content:center;list-style:none}
@media(min-width:860px){.cart-layout{grid-template-columns:1fr 340px}.co-layout{grid-template-columns:1fr 360px}.co-layout .summary{order:2;position:sticky;top:130px}}
@media(max-width:600px){
.cart thead{display:none}
.cart tbody tr{display:grid;grid-template-columns:1fr auto;gap:2px 12px;border-bottom:1px solid var(--line);padding:10px 0;align-items:center}
.cart td{display:block;border:0;padding:2px 0}
.cart td.c-title{grid-column:1/-1;font-size:1rem}
.cart td[data-l="Đơn giá"]{color:var(--muted);font-size:.92rem}
.cart td[data-l="Số lượng"]{grid-row:3}
.cart td[data-l="Thành tiền"]{grid-row:3;text-align:right}
.cart td:last-child{grid-column:1/-1;text-align:right}}

/* ===== Chuyển động ===== */
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}.card:hover,.cat:hover{transform:none}}
@media print{.hd,.ft,.rd-tools{display:none}}
.cart .btn-link{min-height:44px;padding:0 10px}
.nl{margin-top:24px;max-width:460px}
.nl-row{display:flex;gap:8px;flex-wrap:wrap}
.nl-row input[type=email]{flex:1 1 200px;min-width:0;padding:10px 14px;border:1.5px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);font:inherit}
.nl-hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

.invite{margin:28px 0;padding:22px;border:1.5px solid var(--brand);border-radius:var(--r);background:var(--soft);text-align:center;font-family:var(--sans)}
.invite h2{margin:0 0 .3em;font-size:1.25rem}
.invite .buy,.invite .buy .price{font-size:1.5rem}
.invite .actions{justify-content:center;margin:14px 0 0}
.invite .muted:empty{display:none}
.invite-soft{border:0;background:none;padding:8px 0;margin:16px 0}
@media(max-width:480px){.invite{padding:16px}.invite .actions .btn{flex:1 1 100%;text-align:center}}
@media(max-width:480px){
.crumbs ol{flex-wrap:nowrap}
.crumbs li{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:0 1 auto}
.crumbs li:last-child{flex:1 1 auto;min-width:4em}
.crumbs li+li::before{margin:0 5px}
}

.notice{color:var(--brand-d)}
.acct-link{position:relative}

.buybar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;align-items:center;justify-content:center;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:var(--card);border-top:1px solid var(--line);box-shadow:0 -2px 10px rgba(0,0,0,.08)}
.buybar[hidden]{display:none}
.buybar-p,.buybar-p .price{font-size:1.1rem;font-weight:700}
@media(max-width:480px){.buybar-p{display:none}.buybar .btn{flex:1}}
.buybar .btn{min-height:44px}

.tag-hd{display:flex;gap:16px;align-items:flex-start}
.tag-img{width:160px;height:160px;object-fit:cover;border-radius:8px;border:1px solid var(--line);flex:none}
@media(max-width:560px){.tag-hd{flex-direction:column}.tag-img{width:100%;max-width:240px;height:auto;aspect-ratio:1/1}}

/* ===== Trang tĩnh (giới thiệu, chính sách) ===== */
.prose{max-width:760px;overflow-wrap:anywhere}
.prose h2{font-size:1.15rem;margin:1.4em 0 .4em}
.prose ul{padding-left:1.2em;margin:.5em 0}
.prose li{margin:.35em 0}

/* ===== Hết hàng ===== */
.badge-out{background:#fde8e8;color:#9b1c1c}
@media(prefers-color-scheme:dark){.badge-out{background:#4a1d1d;color:#fecaca}}