/* ============================================================
   TCELL JSC - Scientific Minimalism x Editorial Luxury
   Dermocosmetics demo site (MartiDerm / oh!oh!)
   ============================================================ */

:root {
  /* ---- 1. Brand ---- */
  --color-primary: #12233F;      /* xanh navy khoa hoc dam */
  --color-secondary: #2E7D6B;    /* xanh ngoc/teal accent */
  --color-bg: #FAF9F6;
  --color-surface: #ffffff;
  --color-text: #1c2430;
  --color-text-muted: #666f7a;
  --color-border: #e6e3da;

  --color-ink: #0d1a2e;          /* navy dam hon cho gradient */
  --color-teal-soft: rgba(46, 125, 107, 0.1);
  --color-gold: #b08d57;         /* accent phu rat nhe, dung han che */

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 28px;

  --container-width: 1200px;
  --section-padding: clamp(56px, 8vw, 120px);

  --shadow-soft: 0 10px 40px rgba(18, 35, 63, 0.08);
  --shadow-strong: 0 20px 60px rgba(18, 35, 63, 0.18);

  --transition: 0.25s ease;
}

/* ---- 2. Reset co ban ---- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: var(--section-padding) 0; }
.section--alt { background: var(--color-surface); }
.section--ink { background: var(--color-ink); color: rgba(255,255,255,0.88); }
.section--ink .section-title { color: #fff; }
.section--ink .section-desc { color: rgba(255,255,255,0.68); }

.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: 14px;
}
.section-title { font-size: clamp(28px, 4vw, 42px); margin-bottom: 16px; color: var(--color-primary); }
.section-desc { color: var(--color-text-muted); max-width: 640px; }
.section-head { text-align: center; margin: 0 auto 48px; max-width: 720px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.03em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn--primary {
  background: var(--color-secondary);
  color: #fff;
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.btn--outline {
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.btn--outline:hover { border-color: var(--color-secondary); color: var(--color-secondary); }
.btn--ink-outline { border: 1px solid rgba(255,255,255,0.4); color: #fff; }
.btn--ink-outline:hover { border-color: #fff; }
.btn--sm { padding: 10px 20px; font-size: 12.5px; }
.btn--block { width: 100%; justify-content: center; }

/* ---- 3. Header / Mega Menu ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  background: rgba(250, 249, 246, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.site-header.is-scrolled { border-color: var(--color-border); }
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}
.brand { display: flex; align-items: center; }
.brand img { height: 40px; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav > a, .nav-item > .nav-link {
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 8px 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.nav > a:hover, .nav-item > .nav-link:hover { color: var(--color-secondary); }
.nav-item { position: relative; }
.nav-item .caret { font-size: 9px; opacity: 0.6; }
.mega-dropdown {
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-strong);
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 50;
}
.nav-item:hover .mega-dropdown,
.nav-item:focus-within .mega-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.mega-dropdown.mega-dropdown--wide { min-width: 460px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mega-col-title { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-muted); font-weight: 700; margin-bottom: 10px; }
.mega-dropdown a { display: block; font-size: 13.5px; padding: 7px 4px; border-radius: 6px; color: var(--color-text); }
.mega-dropdown a:hover { background: var(--color-bg); color: var(--color-secondary); }

.header-cta { display: flex; align-items: center; gap: 18px; }
.header-hotline { font-size: 13px; font-weight: 700; display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.header-hotline:hover { color: var(--color-secondary); }
.nav-toggle { display: none; }

/* ---- 4. Campaign Hero (trang chu) ---- */
.campaign-hero {
  min-height: 96vh;
  display: flex;
  align-items: center;
  position: relative;
  color: #fff;
  overflow: hidden;
  padding-top: 88px;
  background:
    radial-gradient(circle at 82% 20%, rgba(46,125,107,0.25), transparent 45%),
    linear-gradient(160deg, #0d1a2e 0%, #12233F 55%, #0a1526 100%);
}
.campaign-hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.campaign-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.campaign-hero h1 { font-size: clamp(34px, 5vw, 58px); color: #fff; margin-bottom: 22px; letter-spacing: -0.01em; }
.campaign-hero p { font-size: 17px; color: rgba(255,255,255,0.75); margin-bottom: 34px; max-width: 480px; }
.campaign-hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 44px; }
.campaign-hero-trust { display: flex; gap: 28px; flex-wrap: wrap; border-top: 1px solid rgba(255,255,255,0.15); padding-top: 24px; }
.campaign-hero-trust div { font-size: 12.5px; color: rgba(255,255,255,0.65); }
.campaign-hero-trust strong { display: block; font-family: var(--font-heading); font-size: 22px; color: #fff; font-weight: 600; }

.campaign-hero-visual { position: relative; height: 420px; }
.campaign-hero-visual img {
  position: absolute;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-strong);
  object-fit: cover;
  background: #0d1a2e;
}
.campaign-hero-visual .v-1 { width: 56%; top: 0; right: 0; height: 300px; }
.campaign-hero-visual .v-2 { width: 42%; bottom: 0; left: 0; height: 230px; z-index: 2; border: 4px solid rgba(255,255,255,0.08); }
.campaign-hero-visual .v-badge {
  position: absolute; bottom: 24px; right: 24px; z-index: 3;
  background: rgba(255,255,255,0.96); color: var(--color-primary);
  padding: 14px 18px; border-radius: var(--radius-sm); box-shadow: var(--shadow-strong);
  font-size: 12px; font-weight: 700; max-width: 180px; line-height: 1.4;
}

/* ---- 5. Brand Authority stat cards ---- */
.stat-card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
  text-align: center; padding: 34px 20px; border-radius: var(--radius-md);
  border: 1px solid var(--color-border); background: var(--color-surface);
}
.stat-card-num { font-family: var(--font-heading); font-size: 38px; color: var(--color-secondary); margin-bottom: 8px; }
.stat-card-label { font-size: 13px; color: var(--color-text-muted); }

/* ---- 6. Shop by Concern ---- */
.concern-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.concern-card {
  position: relative; border-radius: var(--radius-md); overflow: hidden;
  background: var(--color-primary); color: #fff; min-height: 190px;
  display: flex; align-items: flex-end; padding: 26px; transition: transform var(--transition);
}
.concern-card:hover { transform: translateY(-4px); }
.concern-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(18,35,63,0.55), rgba(10,20,38,0.92));
}
.concern-card-inner { position: relative; z-index: 1; }
.concern-card-inner .ico { font-size: 26px; margin-bottom: 10px; display: block; }
.concern-card h3 { font-size: 18px; color: #fff; margin-bottom: 6px; }
.concern-card p { font-size: 12.5px; color: rgba(255,255,255,0.65); }

/* ---- 7. Brand Story split blocks ---- */
.brand-story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.brand-story-card {
  border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface);
  border: 1px solid var(--color-border); display: flex; flex-direction: column;
}
.brand-story-media { aspect-ratio: 16/10; overflow: hidden; }
.brand-story-media img { width: 100%; height: 100%; object-fit: cover; }
.brand-story-body { padding: 32px; flex: 1; display: flex; flex-direction: column; }
.brand-story-body .eyebrow { margin-bottom: 8px; }
.brand-story-body h3 { font-size: 24px; margin-bottom: 12px; }
.brand-story-body p { color: var(--color-text-muted); font-size: 14.5px; margin-bottom: 22px; flex: 1; }

/* ---- 8. Product Grid / Card / Filters / Quick View ---- */
.shop-layout { display: grid; grid-template-columns: 240px 1fr; gap: 36px; align-items: start; }
.shop-filters-panel { position: sticky; top: 110px; }
.filter-group { margin-bottom: 28px; }
.filter-group-title { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; margin-bottom: 12px; color: var(--color-primary); }
.filter-option { display: flex; align-items: center; gap: 8px; font-size: 13.5px; padding: 6px 0; color: var(--color-text-muted); cursor: pointer; }
.filter-option input { accent-color: var(--color-secondary); }
.filter-option:hover { color: var(--color-text); }
.filter-reset { font-size: 12.5px; color: var(--color-secondary); font-weight: 600; margin-top: 6px; display: inline-block; }

.shop-filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 32px; }
.shop-filter-btn {
  padding: 9px 20px; border-radius: 999px; border: 1px solid var(--color-border);
  font-size: 13px; font-weight: 600; background: var(--color-surface); color: var(--color-text);
  transition: var(--transition);
}
.shop-filter-btn.is-active, .shop-filter-btn:hover {
  background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}

.shop-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; font-size: 13px; color: var(--color-text-muted); }
.shop-toolbar select { border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 8px 12px; font-size: 13px; font-family: inherit; background: var(--color-surface); }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-grid--3 { grid-template-columns: repeat(3, 1fr); }
.product-card {
  background: var(--color-surface); border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--color-border); transition: var(--transition); display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.product-card-media { position: relative; aspect-ratio: 1 / 1; background: var(--color-bg); overflow: hidden; }
.product-card-media img { width: 100%; height: 100%; object-fit: cover; }
.product-placeholder {
  width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 18px; gap: 10px;
}
.product-placeholder svg { width: 46px; height: 46px; opacity: 0.85; }
.product-placeholder span { font-size: 12px; font-weight: 700; color: rgba(255,255,255,0.92); line-height: 1.35; }
.product-placeholder--martiderm { background: linear-gradient(155deg, #12233F, #2E7D6B); }
.product-placeholder--ohoh { background: linear-gradient(155deg, #2E7D6B, #12233F 120%); }

.product-badge {
  position: absolute; top: 12px; left: 12px; background: var(--color-secondary); color: #fff;
  font-size: 10.5px; font-weight: 700; padding: 5px 10px; border-radius: 999px;
  letter-spacing: 0.04em; text-transform: uppercase;
}
.product-badge--alt { background: var(--color-primary); }
.product-card-body { padding: 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product-card-brand { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-secondary); font-weight: 700; }
.product-card-name {
  font-size: 14.5px; font-weight: 600; line-height: 1.4; min-height: 40px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.product-card-meta { font-size: 11.5px; color: var(--color-text-muted); }
.product-card-price { display: flex; align-items: baseline; gap: 8px; margin-top: auto; padding-top: 6px; }
.product-card-price .price-now { font-family: var(--font-heading); font-size: 17px; font-weight: 700; color: var(--color-primary); }
.product-card-actions { padding: 0 18px 18px; }
.product-card-actions .btn { width: 100%; padding: 11px; font-size: 13px; }

.pd-overlay {
  position: fixed; inset: 0; background: rgba(13,26,46,0.65); z-index: 600;
  display: none; align-items: center; justify-content: center; padding: 24px;
}
.pd-overlay.is-open { display: flex; }
.pd-modal {
  background: #fff; border-radius: var(--radius-lg); max-width: 900px; width: 100%;
  max-height: 90vh; overflow-y: auto; display: grid; grid-template-columns: 1fr 1fr; position: relative;
}
.pd-close {
  position: absolute; top: 16px; right: 16px; width: 36px; height: 36px; border-radius: 999px;
  background: var(--color-bg); font-size: 18px; display: flex; align-items: center; justify-content: center; z-index: 2;
}
.pd-media { background: var(--color-bg); aspect-ratio: 1/1; }
.pd-media img { width: 100%; height: 100%; object-fit: cover; }
.pd-body { padding: 40px; display: flex; flex-direction: column; }
.pd-body .product-card-brand { margin-bottom: 8px; }
.pd-body h2 { font-size: 23px; margin-bottom: 12px; }
.pd-price { display: flex; align-items: baseline; gap: 10px; margin-bottom: 16px; }
.pd-price .price-now { font-family: var(--font-heading); font-size: 26px; font-weight: 700; color: var(--color-primary); }
.pd-desc { color: var(--color-text-muted); font-size: 14px; margin-bottom: 20px; }
.pd-meta-list { font-size: 13px; color: var(--color-text-muted); margin-top: 4px; margin-bottom: 22px; display: flex; flex-direction: column; gap: 6px; }
.pd-actions { display: flex; gap: 10px; }
.pd-actions .btn--outline { flex-shrink: 0; }

/* ---- 9. PDP (trang chi tiet san pham) ---- */
.pdp-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: flex-start; }
.pdp-media { position: sticky; top: 110px; aspect-ratio: 1/1; border-radius: var(--radius-lg); overflow: hidden; background: var(--color-bg); }
.pdp-media img { width: 100%; height: 100%; object-fit: cover; }
.pdp-breadcrumb { font-size: 12.5px; color: var(--color-text-muted); margin-bottom: 22px; }
.pdp-breadcrumb a:hover { color: var(--color-secondary); }
.pdp-brand-link { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-secondary); font-weight: 700; margin-bottom: 10px; display: inline-block; }
.pdp-title { font-size: clamp(26px, 3vw, 36px); margin-bottom: 14px; }
.pdp-size { font-size: 13.5px; color: var(--color-text-muted); margin-bottom: 18px; }
.pdp-price { font-family: var(--font-heading); font-size: 30px; color: var(--color-primary); font-weight: 700; margin-bottom: 24px; }
.pdp-badges { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; }
.pdp-cta-row { display: flex; gap: 12px; margin-bottom: 40px; }
.pdp-block { border-top: 1px solid var(--color-border); padding: 28px 0; }
.pdp-block h3 { font-size: 17px; margin-bottom: 14px; color: var(--color-primary); }
.pdp-block p, .pdp-block li { font-size: 14.5px; color: var(--color-text-muted); }
.pdp-block ul { display: flex; flex-direction: column; gap: 10px; }
.pdp-block li::before { content: '— '; color: var(--color-secondary); font-weight: 700; }
.pdp-ingredient-card { background: var(--color-bg); border-radius: var(--radius-md); padding: 22px; display: flex; gap: 16px; align-items: flex-start; }
.pdp-ingredient-card .ico { width: 44px; height: 44px; border-radius: 50%; background: var(--color-teal-soft); color: var(--color-secondary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 18px; }
.pdp-steps { counter-reset: step; display: flex; flex-direction: column; gap: 14px; }
.pdp-steps li { display: flex; gap: 14px; align-items: flex-start; font-size: 14.5px; color: var(--color-text); }
.pdp-steps li::before {
  counter-increment: step; content: counter(step);
  width: 26px; height: 26px; border-radius: 50%; background: var(--color-primary); color: #fff;
  font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.pdp-routine-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 16px; }

/* ---- 10. Routine steps (trang chu) ---- */
.routine-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.routine-step { text-align: center; }
.routine-step-media { aspect-ratio: 1/1; border-radius: var(--radius-md); overflow: hidden; margin-bottom: 14px; background: var(--color-bg); position: relative; }
.routine-step-media img { width: 100%; height: 100%; object-fit: cover; }
.routine-step-num {
  position: absolute; top: 10px; left: 10px; width: 26px; height: 26px; border-radius: 50%;
  background: var(--color-secondary); color: #fff; font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.routine-step-label { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-secondary); font-weight: 700; margin-bottom: 4px; }
.routine-step h4 { font-size: 14px; margin-bottom: 4px; }
.routine-step p { font-size: 12px; color: var(--color-text-muted); }

/* ---- 11. Trust / clinical proof badges ---- */
.trust-badge-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.trust-badge { text-align: center; padding: 30px 18px; border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,0.14); }
.trust-badge .ico { width: 52px; height: 52px; border-radius: 50%; background: rgba(46,125,107,0.18); color: #6fc9b3; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 22px; }
.trust-badge h4 { font-size: 15px; color: #fff; margin-bottom: 8px; }
.trust-badge p { font-size: 12.5px; color: rgba(255,255,255,0.6); }

/* ---- 12. Journal cards ---- */
.journal-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.journal-card { display: flex; flex-direction: column; }
.journal-card-media { aspect-ratio: 16/11; border-radius: var(--radius-md); overflow: hidden; margin-bottom: 18px; background: var(--color-primary); }
.journal-card-media img { width: 100%; height: 100%; object-fit: cover; }
.journal-card .eyebrow { margin-bottom: 8px; }
.journal-card h3 { font-size: 18px; margin-bottom: 10px; }
.journal-card p { font-size: 13.5px; color: var(--color-text-muted); margin-bottom: 12px; }
.journal-card .read-more { font-size: 12.5px; font-weight: 700; color: var(--color-secondary); }

/* ---- 13. Ingredient library ---- */
.ingredient-hero { background: var(--color-primary); color: #fff; padding: 150px 0 70px; }
.ingredient-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 46px); margin-bottom: 16px; }
.ingredient-hero p { color: rgba(255,255,255,0.72); max-width: 600px; font-size: 15.5px; }
.ingredient-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ingredient-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 30px; transition: var(--transition); }
.ingredient-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.ingredient-card .ico { width: 48px; height: 48px; border-radius: 50%; background: var(--color-teal-soft); color: var(--color-secondary); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; font-size: 20px; }
.ingredient-card h3 { font-size: 19px; margin-bottom: 10px; }
.ingredient-card p { font-size: 14px; color: var(--color-text-muted); margin-bottom: 16px; }
.ingredient-card a { font-size: 12.5px; font-weight: 700; color: var(--color-secondary); }

.ingredient-detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.ingredient-block h3 { font-size: 19px; color: var(--color-primary); margin-bottom: 14px; }
.ingredient-block p, .ingredient-block li { font-size: 14.5px; color: var(--color-text-muted); }
.ingredient-block ul { display: flex; flex-direction: column; gap: 10px; }
.ingredient-block li::before { content: '— '; color: var(--color-secondary); font-weight: 700; }

/* ---- 14. Solution hub (giai phap) ---- */
.solution-hero { background: linear-gradient(160deg, #0d1a2e, #12233F); color: #fff; padding: 150px 0 70px; }
.solution-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 46px); margin-bottom: 16px; max-width: 700px; }
.solution-hero p { color: rgba(255,255,255,0.72); max-width: 600px; font-size: 15.5px; }
.solution-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-flow-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 26px; }
.solution-flow-card .num { font-family: var(--font-heading); font-size: 26px; color: var(--color-secondary); margin-bottom: 10px; }
.solution-flow-card h4 { font-size: 15.5px; margin-bottom: 8px; }
.solution-flow-card p { font-size: 13.5px; color: var(--color-text-muted); }
.faq-item { border-top: 1px solid var(--color-border); padding: 22px 0; }
.faq-item h4 { font-size: 15.5px; margin-bottom: 8px; color: var(--color-primary); }
.faq-item p { font-size: 14px; color: var(--color-text-muted); }

/* ---- 15. B2B / Partner tiers ---- */
.partner-tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.partner-tier-card { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 32px; background: var(--color-surface); text-align: center; }
.partner-tier-card--featured { border-color: var(--color-secondary); box-shadow: var(--shadow-soft); position: relative; }
.partner-tier-card--featured::before {
  content: 'PHỔ BIẾN NHẤT'; position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--color-secondary); color: #fff; font-size: 10.5px; font-weight: 700; letter-spacing: 0.06em;
  padding: 5px 14px; border-radius: 999px;
}
.partner-tier-card h3 { font-size: 20px; margin-bottom: 10px; }
.partner-tier-card .tier-desc { font-size: 13.5px; color: var(--color-text-muted); margin-bottom: 20px; min-height: 40px; }
.partner-tier-card ul { display: flex; flex-direction: column; gap: 10px; text-align: left; margin-bottom: 24px; }
.partner-tier-card li { font-size: 13.5px; color: var(--color-text); display: flex; gap: 8px; }
.partner-tier-card li::before { content: '✓'; color: var(--color-secondary); font-weight: 700; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* ---- 16. About / stats (dung lai tu khung) ---- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); }
.about-stats { display: flex; gap: 40px; margin-top: 32px; flex-wrap: wrap; }
.stat-num { font-family: var(--font-heading); font-size: 32px; color: var(--color-secondary); }
.stat-label { font-size: 13px; color: var(--color-text-muted); }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 32px 28px; transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.card-icon {
  width: 48px; height: 48px; border-radius: 50%; background: var(--color-teal-soft);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--color-secondary); font-size: 18px; font-weight: 700;
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--color-text-muted); font-size: 14px; }

/* ---- 17. Contact / Store locator ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.contact-info-item { display: flex; gap: 16px; margin-bottom: 24px; }
.contact-info-item .ico {
  width: 42px; height: 42px; flex-shrink: 0; border-radius: 50%; background: var(--color-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.map-embed { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); margin-top: 28px; }
.map-embed iframe { width: 100%; height: 320px; border: 0; display: block; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 14px; background: var(--color-surface);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { outline: none; border-color: var(--color-secondary); }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.authentic-strip { display: flex; align-items: center; gap: 14px; background: var(--color-teal-soft); border-radius: var(--radius-md); padding: 18px 22px; margin-top: 28px; font-size: 13.5px; color: var(--color-primary); font-weight: 600; }

/* ---- 18. Footer ---- */
.site-footer { background: var(--color-ink); color: rgba(255,255,255,0.75); padding: 64px 0 32px; }
.site-footer .brand img { filter: brightness(0) invert(1); opacity: 0.92; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.site-footer h4 { color: #fff; font-size: 14.5px; margin-bottom: 16px; }
.site-footer a:hover { color: var(--color-secondary); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.14); padding-top: 24px; display: flex; justify-content: space-between;
  font-size: 12.5px; flex-wrap: wrap; gap: 12px;
}

/* ---- 19. Responsive ---- */
@media (max-width: 980px) {
  .campaign-hero .container { grid-template-columns: 1fr; }
  .campaign-hero-visual { height: 280px; margin-top: 20px; }
  .shop-layout { grid-template-columns: 1fr; }
  .shop-filters-panel { position: static; }
  .pdp-grid { grid-template-columns: 1fr; }
  .pdp-media { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .nav { position: fixed; top: 88px; left: 0; right: 0; bottom: 0; background: var(--color-bg);
    flex-direction: column; align-items: flex-start; justify-content: flex-start; padding: 32px 24px; gap: 6px;
    transform: translateX(100%); transition: transform var(--transition); overflow-y: auto; }
  .nav.is-open { transform: translateX(0); }
  .nav-item { width: 100%; }
  .nav-item > .nav-link { width: 100%; justify-content: space-between; padding: 14px 0; }
  .mega-dropdown, .mega-dropdown--wide {
    position: static; transform: none; opacity: 1; pointer-events: auto; display: none;
    box-shadow: none; border: none; padding: 0 0 10px 12px; grid-template-columns: 1fr; width: 100%;
  }
  .nav-item.is-open .mega-dropdown { display: block; }
  .nav-toggle { display: block; font-size: 22px; }
  .header-hotline span.hotline-text { display: none; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .card-grid, .card-grid--4, .stat-card-grid, .trust-badge-grid, .concern-grid,
  .brand-story-grid, .product-grid, .journal-grid, .ingredient-card-grid,
  .ingredient-detail-grid, .partner-tier-grid, .value-grid, .solution-flow,
  .routine-strip, .pdp-routine-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .form-row-2 { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .card-grid, .card-grid--4, .stat-card-grid, .trust-badge-grid, .concern-grid,
  .brand-story-grid, .product-grid, .journal-grid, .ingredient-card-grid,
  .ingredient-detail-grid, .partner-tier-grid, .value-grid, .solution-flow,
  .routine-strip, .pdp-routine-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .pd-modal { grid-template-columns: 1fr; }
}

/* ============================================================
   CHAT WIDGET - style dung chung, KHONG doi khi tao site moi
   (doi mau tu dong theo --color-primary / --color-secondary o tren)
   ============================================================ */
.chat-launcher {
  position: fixed; right: 24px; bottom: 24px; width: 60px; height: 60px; border-radius: 50%;
  background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-strong); z-index: 700; font-size: 24px; transition: transform var(--transition);
}
.chat-launcher:hover { transform: scale(1.06); }

.chat-window {
  position: fixed; right: 24px; bottom: 96px; width: 370px; max-width: calc(100vw - 32px);
  height: 540px; max-height: calc(100vh - 140px); background: var(--color-surface);
  border-radius: var(--radius-md); box-shadow: var(--shadow-strong); display: flex; flex-direction: column;
  overflow: hidden; z-index: 700; opacity: 0; transform: translateY(16px); pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}
.chat-window.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }

.chat-header { background: var(--color-primary); color: #fff; padding: 16px 18px; display: flex; align-items: center; justify-content: space-between; }
.chat-header-title { font-weight: 700; font-size: 14.5px; }
.chat-header-sub { font-size: 11.5px; color: rgba(255,255,255,0.7); }
.chat-close { color: #fff; font-size: 18px; }

.chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; background: var(--color-bg); }
.chat-msg { max-width: 84%; padding: 10px 14px; border-radius: 14px; font-size: 13.5px; line-height: 1.5; }
.chat-msg--bot { align-self: flex-start; background: var(--color-surface); border: 1px solid var(--color-border); border-bottom-left-radius: 4px; }
.chat-msg--user { align-self: flex-end; background: var(--color-secondary); color: #fff; border-bottom-right-radius: 4px; }
.chat-msg--bot a { color: var(--color-secondary); font-weight: 700; text-decoration: underline; }
.chat-msg--typing { display: flex; gap: 4px; align-items: center; }
.chat-msg--typing span { width: 6px; height: 6px; border-radius: 50%; background: var(--color-text-muted); animation: chatTyping 1s infinite ease-in-out; }
.chat-msg--typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-msg--typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes chatTyping { 0%, 60%, 100% { opacity: 0.3; } 30% { opacity: 1; } }

.chat-quick-replies { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 16px 12px; }
.chat-quick-replies button { font-size: 12px; border: 1px solid var(--color-border); border-radius: 16px; padding: 7px 12px; background: var(--color-surface); transition: border-color var(--transition), color var(--transition); }
.chat-quick-replies button:hover { border-color: var(--color-secondary); color: var(--color-secondary); }
.chat-quick-replies button.chat-quick-reply--contact { border-color: rgba(46,125,107,0.55); color: var(--color-secondary); background: rgba(46,125,107,0.08); font-weight: 600; }
.chat-quick-replies button.chat-quick-reply--contact:hover { border-color: var(--color-secondary); }

.chat-contact-card { align-self: stretch; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 14px; padding: 14px; display: flex; flex-direction: column; gap: 10px; font-size: 13.5px; }
.chat-contact-card__title { font-weight: 700; color: var(--color-primary); font-size: 13.5px; line-height: 1.4; }
.chat-contact-card label { display: block; font-size: 12px; font-weight: 600; margin-bottom: 4px; color: var(--color-text-muted); }
.chat-contact-card input, .chat-contact-card textarea { width: 100%; border: 1px solid var(--color-border); border-radius: 8px; padding: 8px 10px; font-size: 13px; font-family: inherit; background: var(--color-bg); }
.chat-contact-card input:focus, .chat-contact-card textarea:focus { outline: none; border-color: var(--color-secondary); }
.chat-contact-card textarea { resize: vertical; min-height: 44px; }
.chat-contact-card__actions { display: flex; gap: 8px; margin-top: 2px; }
.chat-contact-card__submit { flex: 1; background: var(--color-primary); color: #fff; border-radius: 20px; padding: 9px 14px; font-size: 13px; font-weight: 600; text-align: center; }
.chat-contact-card__submit:disabled { opacity: 0.55; cursor: not-allowed; }
.chat-contact-card__cancel { border: 1px solid var(--color-border); border-radius: 20px; padding: 9px 14px; font-size: 13px; color: var(--color-text-muted); }
.chat-contact-card__cancel:hover { border-color: var(--color-secondary); color: var(--color-secondary); }
.chat-contact-card__error { color: #b3261e; font-size: 12px; }

.chat-input-row { display: flex; align-items: center; gap: 8px; padding: 12px; border-top: 1px solid var(--color-border); background: var(--color-surface); }
.chat-input-row input { flex: 1; border: 1px solid var(--color-border); border-radius: 20px; padding: 10px 16px; font-size: 13.5px; font-family: inherit; }
.chat-input-row input:focus { outline: none; border-color: var(--color-secondary); }
.chat-send { width: 38px; height: 38px; border-radius: 50%; background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.chat-send:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Chuyen ngu VI/EN (bo sung cho i18n.js) ---- */
.lang-toggle {
  display: flex; align-items: center; border: 1px solid var(--color-border);
  border-radius: 999px; overflow: hidden; font-size: 12px; font-weight: 700;
}
.lang-toggle button {
  padding: 5px 11px; color: var(--color-text-muted); background: transparent;
  transition: background 0.2s ease, color 0.2s ease;
}
.lang-toggle button.is-active { background: var(--color-primary); color: #fff; }
@media (max-width: 900px) {
  .lang-toggle { order: -1; }
}