:root{--primary:#6d28d9;--accent:#14b8a6;--bg:#faf5ff;--surface:#ffffff;--text:#1e1b4b;--muted:#64748b;--radius:18px;--font:Georgia,'Times New Roman',serif}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{opacity:.85}
.wrap{width:min(1180px,92vw);margin:0 auto}
.hdr{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid color-mix(in srgb,var(--text) 10%,transparent)}
.hdr-in{display:flex;align-items:center;gap:18px;padding:14px 0;flex-wrap:wrap}
.brand{font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--text)}
.nav{display:flex;gap:14px;flex-wrap:wrap;font-size:14px;flex:1}
.nav{white-space:nowrap;overflow:hidden}
.nav a{color:color-mix(in srgb,var(--text) 78%,transparent);font-size:13.5px}
.nav a:hover{color:var(--primary)}
.searchform input{width:220px;max-width:46vw;padding:8px 12px;border-radius:999px;border:1px solid color-mix(in srgb,var(--text) 15%,transparent);background:var(--surface);color:var(--text);font:inherit;font-size:13px}
.hero{padding:64px 0 56px;color:#fff;position:relative;overflow:hidden}
.hero-in{position:relative;z-index:1}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.08;margin:6px 0 10px;letter-spacing:-.03em}
.hero .lead{max-width:620px;font-size:17px;opacity:.94;margin:0 0 22px}
.hero .kicker{text-transform:uppercase;letter-spacing:.14em;font-size:11px;font-weight:700;opacity:.85;margin:0}
.hero-gradient-1{background:linear-gradient(120deg,var(--primary),var(--accent))}
.hero-gradient-2{background:radial-gradient(900px 400px at 10% 0%,var(--accent),transparent 60%),linear-gradient(120deg,color-mix(in srgb,var(--primary) 70%,#000),var(--primary))}
.hero-gradient-2::after{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 80% 30%,rgba(255,255,255,.18),transparent 45%)}
.hero-pattern{background:linear-gradient(120deg,var(--primary),var(--accent))}
.hero-pattern::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:18px 18px;opacity:.6}
.btn{display:inline-block;background:var(--primary);color:#fff;padding:10px 18px;border-radius:999px;font-weight:700;font-size:14px}
.btn-lg{padding:13px 24px;font-size:15px;background:#fff;color:var(--primary)}
.btn-amz{background:var(--accent);color:#1a1205;display:inline-block;padding:13px 22px;border-radius:10px;font-weight:800;margin-top:16px}
.sect{padding:34px 0}
.sect h2{font-size:clamp(21px,3vw,28px);margin:0 0 16px;letter-spacing:-.02em}
.sect-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.more{font-size:13px;font-weight:600}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{background:var(--surface);border:1px solid color-mix(in srgb,var(--text) 12%,transparent);padding:9px 14px;border-radius:999px;font-size:13px;font-weight:600;color:var(--text);box-shadow:0 1px 0 rgba(0,0,0,.02)}
.chip span{opacity:.55;margin-left:4px}
.grid{display:grid;gap:20px}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.card{background:var(--surface);border:1px solid color-mix(in srgb,var(--text) 10%,transparent);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s ease,box-shadow .15s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 16px 30px -18px rgba(15,23,42,.35)}
.thumb{aspect-ratio:1/1;background:#fff;display:grid;place-items:center;padding:14px}
.thumb img{max-height:100%;object-fit:contain}
.card-b{padding:14px 16px 18px}
.card h3{font-size:15px;line-height:1.35;margin:8px 0 6px}
.card h3 a{color:var(--text)}
.tag{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);font-weight:700}
.mini{font-size:12px;font-weight:600}
.page-top{padding-top:28px}
.crumb{font-size:12px;color:var(--muted);margin:0 0 8px}
.page-top h1{font-size:clamp(24px,4vw,36px);margin:0 0 18px;letter-spacing:-.02em}
.product{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:36px;align-items:start}
.p-media{background:#fff;border:1px solid color-mix(in srgb,var(--text) 10%,transparent);border-radius:var(--radius);padding:26px;display:grid;place-items:center}
.p-media img{max-height:460px;object-fit:contain}
.p-info h1{font-size:clamp(22px,3vw,32px);line-height:1.2;margin:0 0 8px}
.asin{font-size:12px;color:var(--muted);margin:0 0 14px}
.p-desc{color:color-mix(in srgb,var(--text) 82%,transparent);font-size:15px}
.disc{font-size:12px;color:var(--muted);line-height:1.5}
.disc.small{font-size:11px;margin-top:10px}
.narrow{max-width:820px}
.prose{font-size:15.5px;line-height:1.7;color:color-mix(in srgb,var(--text) 88%,transparent)}
.prose h2,.prose h3{margin-top:1.4em}
.prose img{border-radius:12px}
.searchbig input{width:100%;padding:14px 18px;border-radius:12px;border:1px solid color-mix(in srgb,var(--text) 16%,transparent);background:var(--surface);color:var(--text);font:inherit;font-size:15px}
.ftr{border-top:1px solid color-mix(in srgb,var(--text) 10%,transparent);margin-top:40px;padding:28px 0;font-size:12px;color:var(--muted)}
.ftr .links{display:flex;gap:14px;flex-wrap:wrap;margin:12px 0}
.ftr .links a{color:color-mix(in srgb,var(--text) 70%,transparent)}
@media(max-width:760px){.product{grid-template-columns:1fr}.hdr-in{gap:10px}.nav{font-size:13px}}

/* menu variants */
.menu-centered .hdr-in{display:grid;grid-template-columns:1fr auto;grid-template-areas:"brand brand" "nav search";align-items:center;gap:10px 16px}
.menu-centered .brand{grid-area:brand;justify-self:center;font-size:24px}
.menu-centered .nav{grid-area:nav;justify-content:flex-start}
.menu-centered .searchform{grid-area:search;justify-self:end}
.menu-centered .searchform input{width:240px}
.menu-wide .hdr-in{display:grid;grid-template-columns:1fr auto;grid-template-areas:"brand brand" "nav search";align-items:center;gap:10px 16px}
.menu-wide .brand{grid-area:brand}
.menu-wide .nav{grid-area:nav;flex-wrap:wrap}
.menu-wide .searchform{grid-area:search;justify-self:end}
.menu-burger .nav{display:none}
.burger{position:relative}
.burger summary{list-style:none;cursor:pointer;padding:8px 14px;border:1px solid color-mix(in srgb,var(--text) 15%,transparent);border-radius:999px;font-weight:700;font-size:13px}
.burger summary::-webkit-details-marker{display:none}
.burger-list{position:absolute;right:0;top:calc(100% + 8px);background:var(--surface);border:1px solid color-mix(in srgb,var(--text) 12%,transparent);border-radius:12px;padding:8px;display:flex;flex-direction:column;min-width:220px;box-shadow:0 20px 40px -20px rgba(0,0,0,.35);z-index:30}
.burger-list a{padding:8px 10px;border-radius:8px;color:var(--text)}
.burger-list a:hover{background:color-mix(in srgb,var(--primary) 10%,transparent)}
/* card variants */
.card-outline .card{box-shadow:none;border-width:1.5px}
.card-flat .card{box-shadow:none;border:0;background:color-mix(in srgb,var(--text) 5%,var(--surface))}
.card-flat .thumb{background:transparent}
@media(max-width:760px){.menu-centered .hdr-in,.menu-wide .hdr-in{grid-template-columns:1fr;grid-template-areas:"brand" "nav" "search"}.menu-centered .brand,.menu-wide .brand{justify-self:start}.menu-centered .searchform,.menu-wide .searchform{justify-self:stretch;width:100%}.menu-centered .searchform input,.menu-wide .searchform input{width:100%}}

/* catbar */
.menu-catbar .catbar{background:color-mix(in srgb,var(--primary) 7%,var(--surface));border-top:1px solid color-mix(in srgb,var(--text) 8%,transparent);border-bottom:1px solid color-mix(in srgb,var(--text) 8%,transparent)}
.menu-catbar .catbar .nav{justify-content:center;flex-wrap:wrap;padding:9px 0;gap:18px}
/* sidebar */
.menu-sidebar .shell{display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px;align-items:start;padding-top:28px}
.menu-sidebar .side{position:sticky;top:86px;background:var(--surface);border:1px solid color-mix(in srgb,var(--text) 10%,transparent);border-radius:16px;padding:14px;box-shadow:0 18px 40px -30px rgba(15,23,42,.4)}
.menu-sidebar .side-title{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:2px 0 8px 10px;font-weight:700}
.menu-sidebar .side-nav{display:flex;flex-direction:column;gap:2px}
.menu-sidebar .side-nav a{padding:9px 10px;border-radius:10px;color:var(--text);font-size:14px}
.menu-sidebar .side-nav a:hover{background:color-mix(in srgb,var(--primary) 10%,transparent);color:var(--primary)}
.menu-sidebar .main{min-width:0}
@media(max-width:900px){.menu-sidebar .shell{grid-template-columns:1fr;gap:18px}.menu-sidebar .side{position:static}}

/* sidebar: nội dung không tràn mép, thụt vào một chút */
.menu-sidebar .main .wrap{width:100%;max-width:none;box-sizing:border-box;padding-left:26px;padding-right:26px}
.menu-sidebar .main .hero .wrap{padding-left:34px;padding-right:34px}
@media(max-width:900px){.menu-sidebar .main .wrap{padding-left:18px;padding-right:18px}.menu-sidebar .main .hero .wrap{padding-left:22px;padding-right:22px}}

/* footer variants */
.ftr-columns .ftr-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px;padding:34px 0 22px}
.ftr-columns h4{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px;font-weight:800}
.ftr-columns ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.ftr-columns ul a{color:var(--text);font-size:13.5px}
.ftr-columns ul a:hover{color:var(--primary)}
.ftr-brand{font-weight:800;font-size:17px;color:var(--text);display:inline-block;margin-bottom:8px}
.ftr-columns .ftr-bottom{border-top:1px solid color-mix(in srgb,var(--text) 10%,transparent);padding:14px 0 22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;align-items:center}
.ftr-centered{text-align:center}
.ftr-centered .ftr-mark{width:44px;height:44px;margin:0 auto 8px;border-radius:12px;display:grid;place-items:center;font-weight:800;font-size:20px;color:#fff;background:linear-gradient(135deg,var(--primary),var(--accent))}
.ftr-brandline{font-weight:800;font-size:16px;margin:0 0 6px}
.ftr-centered .links{justify-content:center}
.ftr-minimal .ftr-line{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;padding:18px 0}
.ftr-minimal a{color:var(--text);font-size:13px}
.ftr-minimal .ftr-dot{opacity:.4}
@media(max-width:860px){.ftr-columns .ftr-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.ftr-columns .ftr-grid{grid-template-columns:1fr}}

/* ảnh sản phẩm: khung vuông cố định, không phình theo ảnh gốc */
.thumb{display:block;box-sizing:border-box;overflow:hidden;padding:14px}
.thumb img{display:block;width:100%;height:100%;object-fit:contain}
.card-b{flex:1 1 auto}

/* ---------- mobile: sinh động hơn ---------- */
@media (max-width: 760px) {
  body { padding-bottom: calc(62px + env(safe-area-inset-bottom)); }
  .hero { padding: 42px 0 36px; }
  .hero h1 { letter-spacing: -.02em; }
  .chips {
    display: flex; flex-wrap: nowrap; overflow-x: auto; gap: 10px;
    scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
    padding: 2px 2px 8px; scrollbar-width: none;
  }
  .chips::-webkit-scrollbar { display: none; }
  .chip { flex: 0 0 auto; scroll-snap-align: start; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 12px; }
  .card { border-radius: 14px; }
  .card:active { transform: scale(.985); }
  .card-b { padding: 11px 12px 14px; }
  .card h3 { font-size: 13.5px; }
  .btn { border-radius: 10px; min-height: 44px; }
  .btn:active { transform: scale(.97); }
  .p-media { padding: 16px; }
  .p-media img { max-height: 320px; }
  .sect { padding: 26px 0; }
  .m-bar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 45;
    gap: 8px; padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--surface) 92%, transparent);
    backdrop-filter: blur(12px);
    border-top: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
  }
  .m-bar a {
    flex: 1; display: flex; align-items: center; justify-content: center; gap: 7px;
    height: 42px; border-radius: 11px; font-size: 13.5px; font-weight: 700;
    color: var(--text); background: color-mix(in srgb, var(--primary) 10%, var(--surface));
    border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent);
  }
  .m-bar a.m-top { flex: 0 0 96px; }
  .m-bar a:active { transform: scale(.97); }
  .m-ico { font-size: 16px; line-height: 1; }
}
@media (min-width: 761px) { .m-bar { display: none; } }

@media (prefers-reduced-motion: no-preference) {
  .hero-in > * { animation: heroUp .6s ease both; }
  .hero-in > *:nth-child(2) { animation-delay: .05s; }
  .hero-in > *:nth-child(3) { animation-delay: .1s; }
  .hero-in > *:nth-child(4) { animation-delay: .15s; }
  body.js-anim .card { opacity: 0; transform: translateY(12px); }
  body.js-anim .card.in { opacity: 1; transform: none; transition: opacity .45s ease, transform .45s ease; }
}
@keyframes heroUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }