:root {
  --primary: #B5460F;
  --primary-dark: #8f350a;
  --accent: #E8A33D;
  --dark: #3A2417;
  --cream: #FBF6EE;
  --card: #ffffff;
  --text: #2e2119;
  --muted: #7a6a5c;
  --line: #ece2d4;
  --zalo: #0068ff;
  --shadow: 0 6px 24px rgba(58, 36, 23, .08);
  --radius: 14px;
  --wrap: 1180px;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; color: var(--dark); margin: 0 0 .5em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px; font-weight: 600;
  border: 0; cursor: pointer; font-size: 15px; transition: .15s; text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-accent { background: var(--accent); color: var(--dark); }
.btn-zalo { background: var(--zalo); color: #fff; }
.btn-outline { background: #fff; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 246, 238, .92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 24px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--dark); }
.logo:hover { text-decoration: none; }
.logo .mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center; color: #fff; font-size: 20px;
}
.nav { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav a { color: var(--dark); font-weight: 500; }
.nav a:hover { color: var(--primary); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; color: var(--dark); margin-left: auto; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(120deg, #fff7ec 0%, #fbe9d3 100%);
  border-bottom: 1px solid var(--line);
}
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; padding: 56px 20px; }
.hero h1 { font-size: 42px; letter-spacing: -.5px; }
.hero p { font-size: 18px; color: var(--muted); max-width: 520px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.hero-art {
  aspect-ratio: 4/3; border-radius: 20px; box-shadow: var(--shadow);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center; color: #fff; font-size: 90px;
}

/* ---------- Sections ---------- */
section { padding: 56px 0; }
.section-head { text-align: center; margin-bottom: 36px; }
.section-head h2 { font-size: 30px; }

/* ---------- Shop: filter sidebar + toolbar (inspired by vercel/commerce) ---------- */
.shop-layout { display: grid; grid-template-columns: 260px minmax(0,1fr); gap: 32px; align-items: start; }
.shop-sidebar { position: sticky; top: 84px; }
.sidebar-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.sb-search { position: relative; margin-bottom: 14px; }
.sb-search input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; font: inherit; font-size: 14.5px; background: var(--cream); }
.sb-search input:focus { outline: 2px solid var(--accent); border-color: var(--accent); background: #fff; }
.sidebar-card h4 { margin: 4px 6px 10px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; }
.sidebar-card ul { list-style: none; margin: 0; padding: 0; max-height: calc(100vh - 200px); overflow-y: auto; }
.sidebar-card li a {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 9px 12px; border-radius: 9px; color: var(--text); font-size: 14.5px; font-weight: 500;
}
.sidebar-card li a:hover { background: #fff7ec; color: var(--primary); text-decoration: none; }
.sidebar-card li a b { background: var(--cream); color: var(--muted); font-size: 12px; font-weight: 700; padding: 1px 8px; border-radius: 999px; min-width: 26px; text-align: center; }
.sidebar-card li a.active { background: var(--primary); color: #fff; }
.sidebar-card li a.active b { background: rgba(255,255,255,.25); color: #fff; }

.shop-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.shop-toolbar #result-count { font-size: 14.5px; }
.sort-wrap { font-size: 13.5px; color: var(--muted); display: inline-flex; align-items: center; gap: 8px; }
.sort-wrap select { font: inherit; font-size: 14px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 9px; background: #fff; color: var(--text); cursor: pointer; }
.shop-main { min-width: 0; }
.shop-main .prod-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.prod-grid { min-width: 0; }
.prod-card { min-width: 0; }
.prod-card[hidden] { display: none; }
.empty { text-align: center; padding: 60px 0; color: var(--muted); font-size: 15px; }

@media (max-width: 900px) {
  .shop-layout { grid-template-columns: minmax(0,1fr); gap: 14px; }
  .shop-sidebar { position: sticky; top: 68px; z-index: 40; margin: 0 -20px; background: var(--cream); }
  .sidebar-card { border-radius: 0; border-left: 0; border-right: 0; padding: 12px 16px; }
  .sb-search { margin-bottom: 10px; }
  .sidebar-card h4 { display: none; }
  .sidebar-card ul { display: flex; gap: 8px; overflow-x: auto; max-height: none; padding-bottom: 4px; -webkit-overflow-scrolling: touch; }
  .sidebar-card li a { white-space: nowrap; background: #fff; border: 1px solid var(--line); padding: 7px 12px; }
  .sidebar-card li a.active { border-color: var(--primary); }
  .shop-main .prod-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .shop-toolbar { margin-top: 4px; }
}
.section-head p { color: var(--muted); margin: 0; }
.eyebrow { color: var(--primary); font-weight: 700; letter-spacing: 1px; text-transform: uppercase; font-size: 13px; }

/* ---------- Category grid ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; text-align: center; transition: .18s; display: block; color: var(--text);
}
.cat-card:hover { text-decoration: none; box-shadow: var(--shadow); transform: translateY(-3px); border-color: var(--accent); }
.cat-card .ico { font-size: 40px; margin-bottom: 10px; }
.cat-card h3 { font-size: 18px; margin-bottom: 4px; }
.cat-card p { font-size: 13.5px; color: var(--muted); margin: 0; }

/* ---------- Product grid ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 22px; }
.prod-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: .18s; display: flex; flex-direction: column;
}
.prod-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.prod-card .thumb { position: relative; aspect-ratio: 1/1; overflow: hidden; background: #fff; }
.prod-card .thumb img { width: 100%; height: 100%; object-fit: contain; padding: 10px; }
.prod-card .badge {
  position: absolute; top: 10px; left: 10px; background: var(--primary); color: #fff;
  font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px;
}
.prod-body { padding: 16px; display: flex; flex-direction: column; flex: 1; }
.prod-body h3 { font-size: 16.5px; margin-bottom: 4px; }
.prod-body h3 a { color: var(--dark); }
.prod-body h3 a:hover { color: var(--primary); text-decoration: none; }
.prod-body .short { font-size: 13.5px; color: var(--muted); flex: 1; margin: 0 0 8px; }
.prod-body .origin { font-size: 12.5px; color: var(--muted); margin: 0 0 12px; }
.prod-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.price { color: var(--primary); font-weight: 800; font-size: 18px; }
.unit { font-size: 12.5px; color: var(--muted); }
.prod-actions { display: flex; gap: 8px; }
.prod-actions .btn { flex: 1; padding: 9px 10px; font-size: 13.5px; justify-content: center; }

/* ---------- Breadcrumb ---------- */
.crumb { font-size: 14px; color: var(--muted); padding: 20px 0 0; }
.crumb a { color: var(--muted); }

/* ---------- Single product ---------- */
.single { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; padding: 32px 0 12px; }
.single .gallery { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); position: relative; }
.single .gallery .badge { position: absolute; top: 14px; left: 14px; background: var(--primary); color: #fff; font-size: 13px; font-weight: 700; padding: 5px 12px; border-radius: 999px; }
.single h1 { font-size: 32px; }
.single .price { font-size: 28px; }
.single .info-list { list-style: none; padding: 0; margin: 18px 0; border-top: 1px solid var(--line); }
.single .info-list li { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.single .info-list li b { min-width: 120px; color: var(--dark); }
.single .desc p { margin: 0 0 12px; }
.buy-box { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0; }
.buy-box .btn { flex: 1; min-width: 150px; }
.note { background: #fff7ec; border: 1px dashed var(--accent); border-radius: 12px; padding: 14px 16px; font-size: 14px; color: var(--muted); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: inherit; background: #fff;
}
.field input:focus, .field textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.info-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.info-card ul { list-style: none; padding: 0; margin: 0; }
.info-card li { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); align-items: flex-start; }
.info-card li:last-child { border-bottom: 0; }
.info-card .ico { font-size: 22px; }
.map { margin-top: 20px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.map iframe { width: 100%; height: 260px; border: 0; display: block; }
.form-status { padding: 12px 14px; border-radius: 10px; margin-top: 8px; display: none; font-size: 14px; }
.form-status.ok { display: block; background: #e8f6ea; color: #1c6b2b; }
.form-status.err { display: block; background: #fdecea; color: #b3261e; }

/* ---------- Page header ---------- */
.page-hero { background: linear-gradient(120deg, #fff7ec, #fbe9d3); border-bottom: 1px solid var(--line); padding: 40px 0; text-align: center; }
.page-hero h1 { font-size: 34px; margin: 0 0 6px; }
.page-hero p { color: var(--muted); margin: 0; }

/* ---------- Floating buttons ---------- */
.floating { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: flex; flex-direction: column; gap: 12px; }
.floating a {
  width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center;
  color: #fff; font-size: 24px; box-shadow: 0 6px 18px rgba(0,0,0,.2); transition: .15s;
}
.floating a:hover { transform: scale(1.08); text-decoration: none; }
.floating .fz { background: var(--zalo); font-weight: 800; font-size: 15px; }
.floating .fc { background: #16a34a; }
.floating a::after {
  content: attr(data-label); position: absolute; right: 66px; white-space: nowrap;
  background: var(--dark); color: #fff; font-size: 12px; padding: 5px 10px; border-radius: 6px;
  opacity: 0; pointer-events: none; transition: .15s;
}
.floating a:hover::after { opacity: 1; }

/* ---------- Footer ---------- */
.site-footer { background: var(--dark); color: #e9ddd0; padding: 48px 0 24px; margin-top: 40px; }
.site-footer a { color: var(--accent); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.site-footer h4 { color: #fff; margin: 0 0 14px; font-size: 16px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { padding: 5px 0; font-size: 14.5px; }
.foot-brand .logo { color: #fff; margin-bottom: 12px; }
.foot-brand p { color: #c7b6a5; font-size: 14px; max-width: 340px; }
.foot-bottom { text-align: center; border-top: 1px solid rgba(255,255,255,.12); margin-top: 32px; padding-top: 20px; font-size: 13px; color: #b0a091; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .hero .wrap { grid-template-columns: 1fr; padding: 40px 20px; }
  .hero-art { max-width: 380px; }
  .single { grid-template-columns: 1fr; gap: 28px; }
  .contact-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 24px; }
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; background: var(--cream); border-bottom: 1px solid var(--line); padding: 16px 20px; gap: 14px; }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 32px; }
}
@media (max-width: 520px) {
  .prod-grid { grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 14px; }
  .prod-actions { flex-direction: column; }
  .section-head h2 { font-size: 24px; }
}