/* ============================================================
   TUẤN WHISKY — giao diện sáng kiểu shop whisky Anh Quốc
   (phong cách nền kem, thẻ trắng, xanh rêu đậm + vàng đồng,
   tiêu đề serif — lấy cảm hứng từ các shop whisky UK)
   ------------------------------------------------------------
   Đổi màu toàn site: sửa biến trong :root bên dưới.
   ============================================================ */

:root {
  --bg:        #f7f4ee;   /* nền kem sáng */
  --bg-alt:    #efeadf;   /* nền section xen kẽ */
  --card:      #ffffff;   /* thẻ sản phẩm */
  --ink:       #262019;   /* chữ chính */
  --muted:     #7d7466;   /* chữ phụ */
  --green:     #1e3d30;   /* xanh rêu đậm — header/footer */
  --green-2:   #163025;   /* xanh đậm hơn — hover */
  --cream:     #f3eede;   /* chữ sáng trên nền xanh */
  --gold:      #a9812f;   /* vàng đồng — nút, giá, nhấn */
  --gold-2:    #8c6a24;   /* vàng đậm — hover */
  --wine:      #7b1f24;   /* đỏ vang — badge hiếm */
  --line:      #e3dcca;   /* viền mảnh */
  --shadow:    0 10px 30px rgba(38, 32, 25, .10);
  --font-serif: "Playfair Display", Georgia, serif;
  --font-sans:  "Jost", "Segoe UI", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4, .logo-text strong { font-family: var(--font-serif); font-weight: 600; line-height: 1.25; }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
  margin-bottom: 10px;
}

.gold { color: var(--gold); }

/* ============================== BUTTONS ============================== */
.btn {
  display: inline-block;
  padding: 13px 28px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: 3px;
  transition: all .22s;
  text-align: center;
}
.btn-gold  { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-2); }
.btn-dark  { background: var(--green); color: var(--cream); }
.btn-dark:hover { background: var(--green-2); }
.btn-ghost { background: transparent; color: var(--ink); border-color: #b9ae95; }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-2); }
.btn-sm    { padding: 9px 16px; font-size: 12.5px; }
.btn-block { display: block; width: 100%; }

/* ============================== TOPBAR ============================== */
.topbar {
  background: var(--green);
  color: var(--cream);
  font-size: 13.5px;
}
.topbar a { color: var(--cream); }
.topbar a:hover { color: #fff; text-decoration: underline; }
.topbar-inner {
  display: flex; justify-content: space-between; align-items: center;
  min-height: 38px; gap: 14px;
}
.topbar-contact { display: flex; gap: 12px; align-items: center; }
.topbar .sep { opacity: .45; }

/* ============================== HEADER ============================== */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 90;
  box-shadow: 0 2px 12px rgba(38, 32, 25, .06);
}
.header-main {
  display: flex; align-items: center; gap: 22px;
  padding-top: 16px; padding-bottom: 16px;
}
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark {
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--gold);
  color: var(--gold);
  font-family: var(--font-serif); font-size: 24px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.logo-mark-img {
  width: 48px; height: 48px; border-radius: 50%;
  display: block; flex-shrink: 0;
}
.logo-text { line-height: 1.15; }
.logo-text strong { display: block; font-size: 21px; color: var(--ink); }
.logo-text span { font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold-2); }

/* ô tìm kiếm giữa header */
.header-search { flex: 1; max-width: 560px; }
.header-search form { display: flex; border: 1px solid #cfc5ac; border-radius: 3px; overflow: hidden; background: #fff; }
.header-search input {
  flex: 1; border: 0; outline: 0; padding: 11px 16px;
  font-family: inherit; font-size: 14.5px; color: var(--ink); background: transparent;
  min-width: 0;
}
.header-search input::placeholder { color: #a89e8b; }
.header-search button {
  border: 0; background: var(--green); color: var(--cream);
  padding: 0 20px; font-size: 16px; transition: background .2s;
}
.header-search button:hover { background: var(--green-2); }

.header-cta { margin-left: auto; }
.header-hotline { text-align: right; line-height: 1.3; }
.header-hotline span { display: block; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.header-hotline a { font-family: var(--font-serif); font-size: 19px; color: var(--gold-2); font-weight: 700; }
.header-hotline a:hover { color: var(--gold); }

.nav-toggle {
  display: none;
  background: transparent; border: 1px solid var(--line); border-radius: 3px;
  color: var(--ink); font-size: 20px; padding: 6px 12px;
}

/* ============================== NAV ============================== */
.main-nav { background: var(--card); border-top: 1px solid var(--line); }
.nav-list { display: flex; flex-wrap: wrap; }
.nav-list > li > a {
  display: block; padding: 13px 18px;
  font-size: 13.5px; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav-list > li > a:hover, .nav-list > li > a.active { color: var(--gold-2); border-bottom-color: var(--gold); }
.caret { font-size: 9px; opacity: .55; }

/* mega menu */
.has-mega { position: relative; }
.mega {
  position: absolute; left: 0; top: 100%;
  background: var(--card);
  border: 1px solid var(--line); border-top: 2px solid var(--gold);
  box-shadow: var(--shadow);
  display: none; gap: 34px;
  padding: 26px 30px;
  min-width: 720px; z-index: 60;
}
.has-mega:hover .mega, .has-mega.open .mega { display: flex; }
.mega-col h4 { font-size: 15px; color: var(--gold-2); margin-bottom: 10px; }
.mega-col li a {
  display: block; padding: 4px 0;
  font-size: 13.5px; color: #55503f;
}
.mega-col li a:hover { color: var(--gold-2); }
.mega-col .view-all { color: var(--gold); font-weight: 500; margin-top: 4px; }

/* ============================== HERO (nền tối, ảnh chai + ly thật) ============================== */
.hero {
  position: relative;
  background: radial-gradient(130% 150% at 80% 15%, #2b2015 0%, #16120d 45%, #0a0908 100%);
  border-bottom: 1px solid #000;
  overflow: hidden;
}
.hero-bg-video {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .22;
  mix-blend-mode: screen;
  pointer-events: none;
}
.hero::before {
  content: "";
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(115deg, rgba(169, 129, 47, .16), transparent 55%),
    radial-gradient(130% 150% at 80% 15%, rgba(43, 32, 21, .55) 0%, rgba(10, 9, 8, .78) 60%, #0a0908 100%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 40px; align-items: center;
  padding-top: 64px; padding-bottom: 64px;
}
.hero .eyebrow { color: var(--gold); }
.hero h1 { font-size: clamp(30px, 4vw, 44px); margin: 8px 0 18px; color: #f6f1e3; }
.hero h1 em { font-style: italic; color: var(--gold); }
.hero .lead { font-size: 17.5px; color: #c7bda8; max-width: 540px; font-weight: 300; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.hero .btn-ghost { color: #f0e9d8; border-color: rgba(240, 233, 216, .45); }
.hero .btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 40px; margin-top: 44px; }
.hero-stats strong { display: block; font-family: var(--font-serif); font-size: 30px; color: var(--gold); }
.hero-stats span { font-size: 13px; color: #9a8f78; }

/* ảnh chai + ly thật bên phải hero */
.hero-visual {
  position: relative; display: flex; align-items: center; justify-content: center;
  min-height: 380px;
  min-width: 0; /* tránh grid bị "phình" cột khi ảnh chai rộng (bộ 5 chai) hơn cột chữ */
}
.hero-photo-pair {
  display: flex; align-items: flex-end; justify-content: center;
  width: 100%; max-width: 100%;
  transform: translateX(clamp(12px, 2.2vw, 26px));
}
.hero-photo-bottle {
  width: min(912px, 70vw); height: auto; max-width: 100%; min-width: 0;
  filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .55));
  opacity: 0;
  position: relative; z-index: 2;
  flex-shrink: 1;
  animation: heroBottleIn 1.1s cubic-bezier(.16, .8, .3, 1) .25s forwards;
}
.hero-photo-glass {
  width: min(116px, 11vw); height: auto; min-width: 0;
  filter: drop-shadow(0 18px 24px rgba(0, 0, 0, .5));
  opacity: 0;
  position: relative; z-index: 1;
  flex-shrink: 1;
  margin-right: clamp(8px, 1.4vw, 16px);
  animation: heroGlassIn 1.1s cubic-bezier(.16, .8, .3, 1) .55s forwards;
}

@keyframes heroBottleIn {
  from { opacity: 0; transform: translateY(46px) scale(.94); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes heroGlassIn {
  from { opacity: 0; transform: translate(-34px, 26px) scale(.9); }
  to   { opacity: 1; transform: translate(0, 0) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-photo-bottle, .hero-photo-glass { animation: none; opacity: 1; }
}

/* ============================== SECTIONS ============================== */
.section { padding: 68px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 42px; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 10px; }
.section-head p { color: var(--muted); font-weight: 300; }

/* brand strip */
.brand-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.brand-card {
  background: var(--card);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 28px 18px 22px;
  text-align: center;
  transition: transform .22s, box-shadow .22s, border-color .22s;
}
.brand-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #d3c69f; }
.brand-card .brand-photo {
  height: 168px; margin-bottom: 14px;
  display: flex; align-items: center; justify-content: center;
}
.brand-card .brand-photo img,
.brand-card .brand-photo svg {
  height: 100%; width: auto; max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 8px 14px rgba(38, 32, 25, .16));
  transition: transform .4s cubic-bezier(.16, .8, .3, 1);
}
.brand-card:hover .brand-photo img,
.brand-card:hover .brand-photo svg { transform: translateY(-4px) scale(1.06); }
.brand-card .crest { font-size: 26px; color: var(--gold); margin-bottom: 8px; }
.brand-card h3 { font-size: 19px; margin-bottom: 6px; }
.brand-card p { font-size: 13px; color: var(--muted); line-height: 1.5; min-height: 60px; }
.brand-card .count {
  display: inline-block; margin-top: 12px;
  font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--gold-2); border: 1px solid #d8cca6; border-radius: 20px;
  padding: 4px 12px;
}

/* ============================== PRODUCT CARD ============================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 20px;
}
.product-card {
  background: var(--card);
  border: 1px solid var(--line); border-radius: 6px;
  display: flex; flex-direction: column;
  overflow: hidden;
  transition: transform .22s, box-shadow .22s, border-color .22s;
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #d3c69f; }
.product-media {
  position: relative;
  background: #fff;
  padding: 18px;
  display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--line);
}
.product-media img, .product-media svg {
  width: 100%; aspect-ratio: 1; object-fit: contain;
  transition: transform .3s;
}
.product-card:hover .product-media img { transform: scale(1.045); }
.badge-age, .badge-rare {
  position: absolute; top: 10px;
  font-size: 10.5px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 3px; z-index: 2;
}
.badge-age  { left: 10px; background: var(--green); color: var(--cream); }
.badge-rare { right: 10px; background: var(--wine); color: #f7e8e6; }

.product-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.product-brand {
  font-size: 11px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--gold-2); margin-bottom: 4px;
}
.product-name { font-size: 16.5px; line-height: 1.35; margin-bottom: 6px; }
.product-name a:hover { color: var(--gold-2); }
.product-meta { font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.product-price { font-family: var(--font-serif); font-size: 21px; font-weight: 700; color: var(--ink); margin-bottom: 14px; }
.product-actions { margin-top: auto; display: flex; gap: 8px; }
.product-actions .btn { flex: 1; padding-left: 8px; padding-right: 8px; }

.empty-state {
  grid-column: 1 / -1;
  background: var(--card); border: 1px dashed #cabf9f; border-radius: 6px;
  text-align: center; padding: 60px 24px; color: var(--muted);
}
.empty-state h3 { color: var(--ink); margin-bottom: 8px; }

/* ============================== USP + CTA ============================== */
.usp-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.usp { background: var(--card); border: 1px solid var(--line); border-radius: 6px; text-align: center; padding: 28px 18px; }
.usp-icon {
  width: 52px; height: 52px; margin: 0 auto 12px;
  border-radius: 50%; background: var(--green); color: var(--gold);
  font-size: 22px; display: flex; align-items: center; justify-content: center;
}
.usp h4 { font-size: 17px; margin-bottom: 6px; }
.usp p { font-size: 13.5px; color: var(--muted); }

.cta-banner {
  background: var(--green);
  color: var(--cream);
  border-radius: 8px;
  text-align: center;
  padding: 56px 28px;
  box-shadow: var(--shadow);
}
.cta-banner h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 10px; color: #fff; }
.cta-banner p { max-width: 560px; margin: 0 auto 24px; color: #cfd8cd; font-weight: 300; }

/* ============================== PAGE HERO (trang brand) ============================== */
.page-hero {
  background: var(--green);
  color: var(--cream);
  padding: 46px 0 42px;
}
.page-hero .breadcrumb { color: #9fb3a6; margin-bottom: 12px; }
.page-hero .breadcrumb a { color: #c9d6cc; }
.page-hero .breadcrumb a:hover { color: #fff; }
.page-hero .eyebrow { color: #d8b95c; }
.page-hero h1 { font-size: clamp(30px, 4vw, 44px); color: #fff; margin-bottom: 12px; }
.page-hero p { max-width: 720px; color: #cfd8cd; font-weight: 300; }

.breadcrumb { font-size: 13px; color: var(--muted); }
.breadcrumb a { color: #8a8172; }
.breadcrumb a:hover { color: var(--gold-2); }

/* ============================== CATALOG ============================== */
.catalog-layout {
  display: grid; grid-template-columns: 250px 1fr;
  gap: 30px; padding-top: 40px; padding-bottom: 70px;
  align-items: start;
}
.filters {
  background: var(--card);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 22px;
  position: sticky; top: 130px;
}
.filters h3 { font-size: 19px; margin-bottom: 14px; }
.filter-group { border-top: 1px solid var(--line); padding: 14px 0; }
.filter-group h4 { font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--gold-2); margin-bottom: 10px; }
.filter-option {
  display: flex; align-items: center; gap: 9px;
  font-size: 14px; color: #55503f;
  padding: 4px 0; cursor: pointer;
}
.filter-option input { accent-color: var(--gold); width: 15px; height: 15px; }
.filter-clear { width: 100%; margin-top: 10px; }
.filters-toggle { display: none; }

.catalog-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; margin-bottom: 22px; flex-wrap: wrap;
}
.catalog-count { font-size: 14px; color: var(--muted); }
.catalog-count strong { color: var(--ink); }
.sort-select {
  background: var(--card); color: var(--ink);
  border: 1px solid #cfc5ac; border-radius: 3px;
  padding: 10px 14px; font-family: inherit; font-size: 14px;
  outline: none;
}

/* ============================== PRODUCT DETAIL ============================== */
.detail-layout {
  display: grid; grid-template-columns: minmax(320px, 480px) 1fr;
  gap: 44px; padding: 46px 0 70px;
  align-items: start;
}
.detail-media {
  background: var(--card);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 30px;
  position: sticky; top: 130px;
}
.detail-media img, .detail-media svg { width: 100%; aspect-ratio: 1; object-fit: contain; }
.detail-info .breadcrumb { margin-bottom: 16px; }
.detail-info h1 { font-size: clamp(26px, 3.4vw, 38px); margin: 4px 0 14px; }
.detail-desc { color: #5d564a; margin-bottom: 22px; max-width: 640px; }
.spec-table { width: 100%; max-width: 560px; border-collapse: collapse; margin-bottom: 24px; }
.spec-table td { padding: 9px 12px; font-size: 14.5px; border: 1px solid var(--line); }
.spec-table td:first-child { color: var(--muted); width: 150px; background: #faf7ef; }
.spec-table tr:nth-child(even) td { background: #fdfbf6; }
.spec-table tr:nth-child(even) td:first-child { background: #f7f2e6; }
.detail-price { font-family: var(--font-serif); font-size: 34px; font-weight: 700; color: var(--gold-2); }
.detail-vat { font-size: 13px; color: var(--muted); margin: 4px 0 20px; }
.detail-actions { display: grid; gap: 10px; max-width: 420px; }
.detail-note { margin-top: 20px; font-size: 13.5px; color: #5d7a4d; line-height: 1.8; }

/* ============================== FOOTER ============================== */
.site-footer {
  background: var(--green);
  color: #c3cfc6;
  margin-top: 40px;
  font-size: 14.5px;
}
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
  gap: 34px; padding: 52px 0 34px;
}
.footer-about p { margin-top: 14px; font-weight: 300; line-height: 1.7; }
.site-footer .logo-text strong { color: #fff; }
.site-footer .logo-text span { color: var(--gold); }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.site-footer li { padding: 3px 0; }
.footer-contact li { display: flex; align-items: baseline; gap: 12px; }
.footer-contact .k {
  display: block; flex: 0 0 auto; width: 140px;
  color: var(--gold); font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
}
.footer-bottom {
  border-top: 1px solid rgba(243, 238, 222, .16);
  padding: 18px 0 26px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: #9fb3a6;
}
.drink-notice { font-style: italic; }

/* nút nổi liên hệ */
.float-contact {
  position: fixed; right: 18px; bottom: 18px; z-index: 80;
  display: flex; flex-direction: column; gap: 10px;
}
.float-contact a {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 18px rgba(38, 32, 25, .3);
  transition: transform .2s;
}
.float-contact a:hover { transform: scale(1.08); }
.float-zalo { background: #1b6fb8; color: #fff; font-size: 13px; font-weight: 700; }
.float-whatsapp { background: #25d366; color: #fff; font-size: 13px; font-weight: 700; }
.float-phone { background: var(--gold); color: #fff; font-size: 20px; }

/* ============================== AGE GATE ============================== */
.age-gate {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(30, 61, 48, .92);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.age-gate.hidden { display: none; }
.age-gate-box {
  background: var(--card);
  border: 1px solid var(--line); border-radius: 8px;
  max-width: 460px; text-align: center;
  padding: 40px 34px;
  box-shadow: var(--shadow);
}
.age-gate-box h2 { font-size: 26px; margin: 18px 0 10px; }
.age-gate-box p { color: var(--muted); font-size: 14.5px; }
.age-gate-actions { display: flex; gap: 12px; justify-content: center; margin: 24px 0 16px; flex-wrap: wrap; }
.age-gate-box small { color: #a89e8b; font-size: 12px; }

/* ============================== BUY MODAL ============================== */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 150;
  background: rgba(30, 61, 48, .8);
  display: none; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--card);
  border-radius: 8px;
  max-width: 440px; width: 100%;
  padding: 30px 28px;
  position: relative;
  box-shadow: var(--shadow);
}
.modal h3 { font-size: 22px; margin-bottom: 6px; }
.modal-product { color: var(--gold-2); font-size: 14.5px; margin-bottom: 18px; }
.modal-close {
  position: absolute; top: 12px; right: 14px;
  background: transparent; border: 0;
  font-size: 26px; color: var(--muted); line-height: 1;
}
.modal-close:hover { color: var(--ink); }
.contact-links { display: grid; gap: 10px; }
.contact-link {
  display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--line); border-radius: 6px;
  padding: 12px 14px;
  transition: border-color .2s, background .2s;
}
.contact-link:hover { border-color: var(--gold); background: #fdfaf2; }
.contact-link .icon {
  width: 42px; height: 42px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 17px;
}
.icon-fb { background: #1877f2; }
.icon-zalo { background: #1b6fb8; }
.icon-whatsapp { background: #25d366; }
.icon-phone { background: var(--gold); }
.contact-link strong { display: block; font-size: 15px; }
.contact-link span span { font-size: 12.5px; color: var(--muted); }

/* ============================== RESPONSIVE ============================== */
@media (max-width: 1024px) {
  .brand-strip { grid-template-columns: repeat(3, 1fr); }
  .usp-row { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .header-search { max-width: none; }
  .hero-photo-bottle { width: min(624px, 94vw); }
  .hero-photo-glass { width: min(79px, 14.8vw); }
}

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .header-search { order: 3; flex-basis: 100%; }
  .header-main { flex-wrap: wrap; gap: 14px; }
  .main-nav { display: none; border-top: 1px solid var(--line); }
  .main-nav.open { display: block; }
  .nav-list { flex-direction: column; }
  .nav-list > li > a { border-bottom: 1px solid var(--line); padding: 13px 6px; }
  .mega { position: static; min-width: 0; flex-direction: column; gap: 18px; box-shadow: none; border-left: 2px solid var(--gold); }
  .hero-inner { grid-template-columns: 1fr; padding-top: 44px; padding-bottom: 24px; text-align: center; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { order: -1; min-height: 260px; margin-bottom: 8px; }
  .hero-photo-glass { width: min(79px, 14.8vw); }
  .catalog-layout { grid-template-columns: 1fr; }
  .filters { display: none; position: static; }
  .filters.open { display: block; }
  .filters-toggle { display: inline-block; }
  .detail-layout { grid-template-columns: 1fr; gap: 26px; }
  .detail-media { position: static; max-width: 420px; margin: 0 auto; }
}

@media (max-width: 560px) {
  .hide-mobile { display: none; }
  .topbar-inner { justify-content: center; }
  .brand-strip { grid-template-columns: 1fr 1fr; }
  .brand-card p { min-height: 0; }
  .usp-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .product-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
  .product-actions { flex-direction: column; }
  .hero-stats { gap: 22px; }
  .header-hotline span { display: none; }
  .hero-photo-glass { width: min(79px, 14.8vw); }
}

/* ============================================================
   ✨ HIỆU ỨNG & ĐÁNH BÓNG (thêm mới — không đổi bố cục)
   ============================================================ */

/* ---------- Scroll reveal: hiện dần khi cuộn tới ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s cubic-bezier(.16, .8, .3, 1),
              transform .7s cubic-bezier(.16, .8, .3, 1);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ---------- Eyebrow: đường kẻ vàng nhỏ dẫn trước chữ ---------- */
.section-head .eyebrow::before,
.section-head .eyebrow::after {
  content: "";
  display: inline-block;
  width: 26px; height: 1px;
  background: var(--gold);
  vertical-align: middle;
  margin: 0 10px;
  opacity: .6;
}

/* ---------- Tiêu đề section: gạch chân vàng bung ra ---------- */
.section-head h2 { position: relative; display: inline-block; padding-bottom: 14px; }
.section-head h2::after {
  content: "";
  position: absolute; left: 50%; bottom: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  transform: translateX(-50%);
  transition: width .8s cubic-bezier(.16, .8, .3, 1) .2s;
}
.section-head.in h2::after,
.reveal.in .section-head h2::after { width: 88px; }
/* khi chính section-head là .reveal */
.section-head.reveal.in h2::after { width: 88px; }

/* ---------- Nút: nâng nhẹ + vệt sáng quét qua nút vàng ---------- */
.btn { position: relative; overflow: hidden; }
.btn-gold, .btn-dark { box-shadow: 0 6px 16px rgba(169, 129, 47, .18); }
.btn-gold:hover, .btn-dark:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(169, 129, 47, .3); }
.btn-ghost:hover { transform: translateY(-2px); }
.btn-gold::after, .btn-dark::after {
  content: "";
  position: absolute; top: 0; left: -75%;
  width: 50%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, .45), transparent);
  transform: skewX(-20deg);
  transition: left .6s ease;
}
.btn-gold:hover::after, .btn-dark:hover::after { left: 130%; }

/* ---------- Nav: gạch chân trượt từ giữa (chỉ desktop) ---------- */
@media (min-width: 881px) {
  .nav-list > li > a { position: relative; border-bottom-color: transparent; }
  .nav-list > li > a::after {
    content: "";
    position: absolute; left: 50%; bottom: 0;
    width: 0; height: 2px; background: var(--gold);
    transform: translateX(-50%);
    transition: width .28s ease;
  }
  .nav-list > li > a:hover::after,
  .nav-list > li > a.active::after { width: calc(100% - 30px); }
}

/* ---------- Header: đổ bóng rõ hơn khi cuộn ---------- */
.site-header.scrolled { box-shadow: 0 6px 24px rgba(38, 32, 25, .12); }

/* ---------- Brand card: ánh sáng vàng lướt + crest xoay nhẹ ---------- */
.brand-card { position: relative; overflow: hidden; }
.brand-card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(120% 90% at 50% -20%, rgba(169, 129, 47, .12), transparent 60%);
  opacity: 0; transition: opacity .3s;
}
.brand-card:hover::before { opacity: 1; }
.brand-card .crest { transition: transform .4s cubic-bezier(.16, .8, .3, 1); }
.brand-card:hover .crest { transform: scale(1.25) rotate(8deg); }
.brand-card .count { transition: background .25s, color .25s, border-color .25s; }
.brand-card:hover .count { background: var(--gold); color: #fff; border-color: var(--gold); }

/* ---------- USP: icon nảy nhẹ khi hover ---------- */
.usp { transition: transform .22s, box-shadow .22s, border-color .22s; }
.usp:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #d3c69f; }
.usp-icon { transition: transform .35s cubic-bezier(.34, 1.56, .64, 1); }
.usp:hover .usp-icon { transform: translateY(-4px) scale(1.08); }

/* ---------- Product card: viền vàng mảnh sáng lên ---------- */
.product-card { position: relative; }
.product-card::after {
  content: "";
  position: absolute; inset: 0; border-radius: 6px;
  box-shadow: inset 0 0 0 1px rgba(169, 129, 47, 0);
  transition: box-shadow .25s; pointer-events: none;
}
.product-card:hover::after { box-shadow: inset 0 0 0 1px rgba(169, 129, 47, .5); }

/* ---------- CTA banner: nền ánh vàng chuyển động chậm ---------- */
.cta-banner { position: relative; overflow: hidden; }
.cta-banner::before {
  content: "";
  position: absolute; inset: -50%;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(169, 129, 47, .18) 60deg, transparent 140deg);
  animation: ctaSpin 14s linear infinite;
  pointer-events: none;
}
.cta-banner > * { position: relative; z-index: 1; }
@keyframes ctaSpin { to { transform: rotate(360deg); } }

/* ---------- Hero: khối ảnh trôi bồng bềnh nhẹ ---------- */
.hero-photo-pair { animation: heroFloat 6s ease-in-out 1.6s infinite; }
@keyframes heroFloat {
  0%, 100% { transform: translateX(clamp(12px, 2.2vw, 26px)) translateY(0); }
  50%      { transform: translateX(clamp(12px, 2.2vw, 26px)) translateY(-12px); }
}
/* Hero stats hiện dần so le */
.hero-stats > div {
  opacity: 0;
  animation: fadeUp .7s cubic-bezier(.16, .8, .3, 1) forwards;
}
.hero-stats > div:nth-child(1) { animation-delay: .7s; }
.hero-stats > div:nth-child(2) { animation-delay: .85s; }
.hero-stats > div:nth-child(3) { animation-delay: 1s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* ---------- Nút nổi liên hệ: nhịp đập nhẹ để thu hút ---------- */
.float-phone { animation: floatPulse 2.4s ease-in-out infinite; }
@keyframes floatPulse {
  0%, 100% { box-shadow: 0 6px 18px rgba(38, 32, 25, .3), 0 0 0 0 rgba(169, 129, 47, .5); }
  50%      { box-shadow: 0 6px 18px rgba(38, 32, 25, .3), 0 0 0 12px rgba(169, 129, 47, 0); }
}

/* ---------- Modal mua hàng: bung nhẹ khi mở ---------- */
.modal-backdrop { transition: opacity .25s; }
.modal-backdrop.open .modal { animation: modalIn .35s cubic-bezier(.16, .8, .3, 1); }
@keyframes modalIn { from { opacity: 0; transform: translateY(18px) scale(.96); } to { opacity: 1; transform: none; } }
.contact-link { transition: border-color .2s, background .2s, transform .2s; }
.contact-link:hover { transform: translateX(4px); }

@media (prefers-reduced-motion: reduce) {
  .hero-photo-pair, .cta-banner::before, .float-phone,
  .hero-stats > div { animation: none !important; }
  .hero-stats > div { opacity: 1; }
}