/* ==========================================================================
   IUVER BARRIER CREAM — one page
   Hệ màu, typography và bố cục tuân theo Quy_tac_visual_bat_buoc.md
   Clinical White × Barrier Peach × Charcoal · Less decoration, more evidence.
   ========================================================================== */

:root{
  --white:      #FAF9F7;   /* Primary background  — nền chủ đạo        */
  --peach:      #F5A17F;   /* Brand accent        — CHỈ dùng làm nhấn  */
  --soft:       #FCE5DA;   /* Secondary background                     */
  --charcoal:   #333333;   /* Main text                                */
  --grey:       #E9E6E3;   /* Neutral — đường kẻ, viền                 */

  /* Độ mờ đã được chọn để đạt tương phản WCAG AA (>=4.5:1) trên cả ba nền
     Warm White, Soft Peach và Warm Grey. Không hạ thấp hai giá trị này. */
  --ink-70: rgba(51,51,51,.76);   /* text phụ        — 5.2–5.8:1 */
  --ink-55: rgba(51,51,51,.72);   /* nhãn nhỏ, meta  — 4.7–5.1:1 */
  --peach-08: rgba(245,161,127,.08);
  --peach-18: rgba(245,161,127,.18);

  --wrap: 1200px;
  --wrap-narrow: 780px;
  --pad: 24px;
  --radius: 12px;
  --radius-sm: 8px;

  --sect-y: 120px;
  --header-h: 74px;

  --f-head: 'Manrope', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; scroll-padding-top:calc(var(--header-h) + 16px); }
body{
  margin:0;
  background:var(--white);
  color:var(--charcoal);
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{ max-width:100%; display:block; }
img{ height:auto; }
button{ font:inherit; color:inherit; }
a{ color:inherit; }

h1,h2,h3{ font-family:var(--f-head); line-height:1.18; margin:0; letter-spacing:-.015em; }
h1{ font-size:clamp(38px,5.2vw,60px); font-weight:700; }
h2{ font-size:clamp(28px,3.4vw,40px); font-weight:600; }
h3{ font-size:clamp(19px,1.7vw,23px); font-weight:600; letter-spacing:-.01em; }
p{ margin:0 0 1em; }
p:last-child{ margin-bottom:0; }

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--charcoal); color:var(--white);
  padding:12px 20px; border-radius:0 0 var(--radius-sm) 0;
}
.skip-link:focus{ left:0; }

:focus-visible{ outline:2px solid var(--peach); outline-offset:3px; border-radius:4px; }

/* ---------- layout ---------- */
.container{ width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:var(--pad); }
.container-narrow{ max-width:var(--wrap-narrow); }

.section{ padding-block:var(--sect-y); }
.section-tight{ padding-block:calc(var(--sect-y) * .78); }
.section-soft{ background:linear-gradient(180deg,var(--white) 0%,var(--soft) 45%,var(--soft) 55%,var(--white) 100%); }

.section-head{ max-width:720px; margin-bottom:56px; }
.section-head.center{ margin-inline:auto; text-align:center; }
.section-sub{ margin-top:16px; color:var(--ink-70); font-size:18px; }

/* Barrier Line — visual signature */
.barrier-line{ display:block; width:64px; height:2px; background:var(--peach); margin:22px 0; border-radius:2px; }
.section-head.center .barrier-line{ margin-inline:auto; }

.eyebrow{
  display:flex; align-items:center; gap:12px;
  font-family:var(--f-body); font-size:12px; font-weight:600;
  letter-spacing:.14em; text-transform:uppercase; color:var(--ink-55);
  margin:0 0 18px;
}
.section-head.center .eyebrow{ justify-content:center; }
.eyebrow .bl{ width:22px; height:2px; background:var(--peach); border-radius:2px; flex:none; }

.lede{ font-size:19px; color:var(--ink-70); max-width:52ch; }

.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }

/* ---------- buttons ---------- */
.btn{
  --btn-bg:transparent; --btn-fg:var(--charcoal); --btn-bd:var(--charcoal);
  display:inline-flex; align-items:center; justify-content:center;
  font-family:var(--f-head); font-weight:600; font-size:16px; line-height:1;
  padding:16px 30px; border-radius:100px; text-decoration:none;
  background:var(--btn-bg); color:var(--btn-fg); border:1.5px solid var(--btn-bd);
  cursor:pointer; transition:transform .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}
.btn:hover{ transform:translateY(-2px); }
.btn:active{ transform:translateY(0); }
/* Peach + charcoal = 6.2:1 — không dùng chữ trắng trên peach (chỉ 2:1) */
.btn-primary{ --btn-bg:var(--peach); --btn-bd:var(--peach); --btn-fg:var(--charcoal); }
.btn-primary:hover{ --btn-bg:#F0906A; --btn-bd:#F0906A; }
.btn-ghost{ --btn-bd:var(--grey); }
.btn-ghost:hover{ --btn-bd:var(--charcoal); }
.btn-sm{ padding:12px 22px; font-size:15px; }
.btn-block{ display:flex; width:100%; }

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(250,249,247,.88);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--grey);
}
.header-inner{ display:flex; align-items:center; gap:32px; height:var(--header-h); }

.logo{ display:flex; align-items:center; gap:11px; text-decoration:none; flex:none; }
.logo-mark{ width:26px; height:26px; color:var(--charcoal); flex:none; }
.logo-text{ display:flex; flex-direction:column; line-height:1.05; }
.logo-text strong{ font-family:var(--f-head); font-weight:700; font-size:19px; letter-spacing:.1em; }
.logo-text em{ font-style:normal; font-size:8.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-55); margin-top:2px; }

.site-nav{ display:flex; gap:28px; margin-left:auto; }
.site-nav a{
  position:relative; text-decoration:none; font-size:15px; color:var(--ink-70);
  padding:6px 0; transition:color .2s var(--ease);
}
.site-nav a::after{
  content:''; position:absolute; left:0; right:100%; bottom:0; height:2px;
  background:var(--peach); transition:right .28s var(--ease);
}
.site-nav a:hover, .site-nav a.is-active{ color:var(--charcoal); }
.site-nav a.is-active::after{ right:0; }

.header-cta{ flex:none; }
.nav-toggle{ display:none; }

/* ---------- hero ---------- */
.hero{ padding-block:clamp(56px,7vw,104px) clamp(56px,7vw,96px); }
.hero-grid{ display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
.hero-copy .lede{ margin-top:4px; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:36px; }
.hero-meta{ margin-top:28px; font-size:14px; color:var(--ink-55); }

.hero-visual{ position:relative; display:flex; justify-content:center; }
.hero-visual img{ width:100%; max-width:520px; }
/* Barrier Line dưới dạng vòng bảo vệ quanh sản phẩm */
.hero-ring{
  position:absolute; top:50%; left:50%; translate:-50% -50%;
  width:min(420px,84%); aspect-ratio:1; border-radius:50%;
  border:1.5px solid var(--peach); opacity:.5; pointer-events:none;
}
.hero-ring::after{
  content:''; position:absolute; inset:34px; border-radius:50%;
  border:1px solid var(--peach); opacity:.35;
}

/* ---------- trust bar ---------- */
.trustbar{ background:var(--grey); }
.trustbar-inner{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:rgba(51,51,51,.10); }
.trust-item{
  background:var(--grey); padding:22px 24px; text-decoration:none;
  display:flex; flex-direction:column; gap:4px; transition:background-color .2s var(--ease);
}
a.trust-item:hover{ background:#E1DDD9; }
.trust-item strong{ font-family:var(--f-head); font-weight:600; font-size:15px; }
.trust-item span{ font-size:13.5px; color:var(--ink-70); }

/* ---------- quiz ---------- */
.quiz{ display:grid; grid-template-columns:1.25fr .75fr; gap:40px; align-items:start; }
.quiz-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }

.check{ display:flex; align-items:flex-start; gap:14px; cursor:pointer;
  background:var(--white); border:1px solid var(--grey); border-radius:var(--radius);
  padding:18px 20px; transition:border-color .2s var(--ease), background-color .2s var(--ease); }
.check:hover{ border-color:var(--peach); }
.check input{ position:absolute; opacity:0; width:0; height:0; }
.check .box{
  width:20px; height:20px; flex:none; margin-top:2px; border-radius:5px;
  border:1.5px solid var(--ink-55); background:#fff;
  display:grid; place-items:center; transition:all .18s var(--ease);
}
.check .box::after{
  content:''; width:10px; height:6px; border-left:2px solid var(--charcoal); border-bottom:2px solid var(--charcoal);
  rotate:-45deg; margin-top:-2px; opacity:0; transition:opacity .18s var(--ease);
}
.check input:checked ~ .box{ background:var(--peach); border-color:var(--peach); }
.check input:checked ~ .box::after{ opacity:1; }
.check input:focus-visible ~ .box{ outline:2px solid var(--peach); outline-offset:3px; }
.check .txt{ font-size:16.5px; }

.quiz-result{
  background:var(--white); border:1px solid var(--grey); border-radius:var(--radius);
  padding:32px 28px; text-align:center; position:sticky; top:calc(var(--header-h) + 24px);
}
.quiz-count{ font-family:var(--f-head); font-weight:700; font-size:52px; line-height:1; margin:0; font-variant-numeric:tabular-nums; }
.quiz-count .of{ font-size:24px; color:var(--ink-55); font-weight:600; }
.quiz-label{ font-size:13px; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-55); margin:8px 0 18px; }
.quiz-text{ font-size:16px; min-height:76px; margin-bottom:20px; }
.quiz-text strong{ font-family:var(--f-head); }
.quiz-note{ font-size:12.5px; color:var(--ink-55); margin-top:16px; line-height:1.55; }

/* ---------- diagram ---------- */
.diagram{ margin:0 0 64px; padding:40px 32px; border:1px solid var(--grey); border-radius:var(--radius); background:var(--white); }
.diagram svg{ width:100%; height:auto; }
.d-cap{ font-family:'Manrope',sans-serif; font-size:13px; font-weight:600; letter-spacing:.16em; fill:#333; }
.d-sm{ font-family:'Inter',sans-serif; font-size:13px; fill:#333; }
.d-layer{ font-family:'Manrope',sans-serif; font-size:15px; font-weight:600; letter-spacing:.08em; }

.facts .fact{ border-top:1px solid var(--grey); padding-top:24px; }
.fact-num{ font-family:var(--f-head); font-size:13px; font-weight:600; color:var(--peach); letter-spacing:.1em; display:block; margin-bottom:12px; }
.fact h3{ margin-bottom:10px; }
.fact p{ color:var(--ink-70); font-size:16px; }

/* ---------- roles ---------- */
.roles{ position:relative; display:grid; grid-template-columns:repeat(3,1fr); gap:36px; padding-top:30px; }
.roles-line{ position:absolute; top:5px; left:8%; right:8%; height:1.5px; background:var(--peach); opacity:.45; }
.role{ position:relative; }
.role-dot{ position:absolute; top:-30px; left:0; width:11px; height:11px; border-radius:50%; background:var(--peach); }
.role-num{ font-family:var(--f-head); font-size:13px; font-weight:600; color:var(--ink-55); letter-spacing:.1em; display:block; margin-bottom:10px; }
.role h3{ margin-bottom:10px; }
.role p{ color:var(--ink-70); font-size:16px; }

/* ---------- nhà sáng lập & R&D ---------- */
.founder-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:64px; align-items:center; }

.founder-photo{ position:relative; margin:0; display:flex; justify-content:center; }
.founder-photo img{
  width:100%; max-width:400px; border-radius:var(--radius);
  /* Ảnh gốc nền tối — viền mảnh giữ cảm giác clinical, không đổ bóng nặng */
  border:1px solid var(--grey);
}
/* Barrier Line ôm lấy chân dung */
.founder-ring{
  position:absolute; left:50%; top:50%; translate:-50% -50%;
  width:min(430px,100%); height:calc(100% + 44px);
  border:1.5px solid var(--peach); border-radius:calc(var(--radius) + 8px);
  opacity:.55; pointer-events:none;
}

.founder-copy h2{ margin-bottom:4px; }
.founder-role{
  font-family:var(--f-head); font-weight:600; font-size:16px;
  color:var(--ink-70); margin-bottom:24px; line-height:1.5;
}

.brand-stats{ margin:40px 0 0; display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.brand-stats > div{ border-top:1px solid rgba(51,51,51,.16); padding-top:18px; }
.brand-stats dt{
  font-family:var(--f-head); font-weight:700; font-size:clamp(28px,3vw,36px);
  line-height:1.05; font-variant-numeric:tabular-nums; margin-bottom:8px;
}
.brand-stats dt span{ color:var(--peach); }
.brand-stats dd{ margin:0; font-size:14px; color:var(--ink-70); line-height:1.5; }

/* ---------- gallery hoạt động ---------- */
.gallery{ display:grid; grid-template-columns:repeat(3,1fr); gap:26px; }
.gal{ margin:0; }
.gal-item{
  display:block; width:100%; padding:0; border:1px solid var(--grey);
  border-radius:var(--radius); overflow:hidden; background:var(--white);
  cursor:zoom-in; transition:border-color .2s var(--ease);
}
.gal-item:hover{ border-color:var(--peach); }
.gal-item img{ width:100%; aspect-ratio:3/2; object-fit:cover; transition:scale .4s var(--ease); }
.gal-item:hover img{ scale:1.03; }
.gal figcaption{ padding-top:14px; font-size:14px; color:var(--ink-70); line-height:1.5; }

/* ---------- ingredients ---------- */
.ing{ border:1px solid var(--grey); border-radius:var(--radius); padding:28px 26px; background:var(--white); }
.ing-inci{ font-size:11.5px; letter-spacing:.14em; color:var(--ink-55); margin-bottom:10px; font-weight:600; }
.ing h3{ margin-bottom:10px; }
.ing-role{ color:var(--ink-70); font-size:15.5px; }
.ing.is-empty{ border-style:dashed; }
.ing.is-empty h3,.ing.is-empty .ing-role,.ing.is-empty .ing-inci{ opacity:.45; }

/* ---------- product ---------- */
.product-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.product-visual img{ width:100%; }
.product-copy h2{ margin-bottom:12px; }

.specs{ margin:32px 0 0; display:grid; grid-template-columns:repeat(2,1fr); gap:0 32px; }
.specs > div{ display:flex; flex-direction:column; gap:2px; padding:14px 0; border-bottom:1px solid rgba(51,51,51,.12); }
.specs dt{ font-size:12.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--ink-55); }
.specs dd{ margin:0; font-family:var(--f-head); font-weight:600; font-size:16px; }

.callout{ margin-top:32px; padding:26px 28px; background:var(--white); border-radius:var(--radius); border-left:3px solid var(--peach); }
.callout h3{ font-size:17px; margin-bottom:8px; }
.callout p{ font-size:15.5px; color:var(--ink-70); }

/* ---------- tabs ---------- */
.tablist{ display:flex; gap:8px; justify-content:center; flex-wrap:wrap; margin-bottom:40px; }
.tab{
  background:transparent; border:1.5px solid var(--grey); border-radius:100px;
  padding:12px 24px; font-family:var(--f-head); font-weight:600; font-size:15px;
  cursor:pointer; transition:all .2s var(--ease); color:var(--ink-70);
}
.tab:hover{ border-color:var(--charcoal); color:var(--charcoal); }
.tab.is-active{ background:var(--peach); border-color:var(--peach); color:var(--charcoal); }

.panel{ display:none; }
.panel.is-active{ display:block; animation:fade .35s var(--ease); }
@keyframes fade{ from{ opacity:0; translate:0 8px; } to{ opacity:1; translate:0 0; } }

.routine{ display:grid; grid-template-columns:1fr 1fr; gap:32px; }
.routine-col{ border:1px solid var(--grey); border-radius:var(--radius); padding:30px 28px; background:var(--white); }
.routine-col h3{ margin-bottom:20px; }
.steps{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:16px; counter-reset:s; }
.steps li{ display:flex; align-items:flex-start; gap:14px; font-size:16px; }
.steps li span{
  flex:none; width:26px; height:26px; border-radius:50%; background:var(--peach-18);
  display:grid; place-items:center; font-family:var(--f-head); font-weight:600; font-size:13px; margin-top:1px;
}
.routine-note{ margin-top:24px; font-size:14.5px; color:var(--ink-70); text-align:center; }

/* ---------- docs & table ---------- */
.docs{ display:grid; grid-template-columns:1fr 1fr; gap:32px; margin-bottom:56px; }
.doc{ margin:0; }
.doc-thumb{
  position:relative; display:block; width:100%; padding:0; border:1px solid var(--grey);
  border-radius:var(--radius); overflow:hidden; background:#fff; cursor:zoom-in;
  transition:border-color .2s var(--ease);
}
.doc-thumb:hover{ border-color:var(--peach); }
.doc-thumb img{ width:100%; aspect-ratio:1/1; object-fit:cover; object-position:top center; }
.doc-zoom{
  position:absolute; right:14px; bottom:14px; background:rgba(250,249,247,.95);
  border:1px solid var(--grey); border-radius:100px; padding:7px 16px; font-size:13px; font-weight:600;
  font-family:var(--f-head);
}
.doc figcaption{ padding-top:20px; }
.doc figcaption h3{ margin-bottom:8px; }
.doc figcaption p{ font-size:14.5px; color:var(--ink-70); }

.table-wrap{ overflow-x:auto; border:1px solid var(--grey); border-radius:var(--radius); background:var(--white); }
.lab{ width:100%; border-collapse:collapse; min-width:480px; }
.lab caption{
  text-align:left; padding:22px 26px 0; font-family:var(--f-head); font-weight:600; font-size:17px;
}
.lab th,.lab td{ padding:14px 26px; text-align:left; font-size:15.5px; border-bottom:1px solid var(--grey); }
.lab thead th{ font-family:var(--f-head); font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-55); font-weight:600; padding-top:20px; }
.lab tbody tr:last-child td{ border-bottom:none; }
.lab td.ok{ color:var(--ink-70); }
.lab td:nth-child(2),.lab td:nth-child(3){ font-variant-numeric:tabular-nums; }

.disclaimer{
  margin-top:24px; padding:20px 24px; background:var(--peach-08);
  border-left:3px solid var(--peach); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:14.5px; color:var(--ink-70);
}

/* ---------- fit ---------- */
.fit{ display:grid; grid-template-columns:1fr 1fr; gap:32px; }
.fit-col{ border:1px solid var(--grey); border-radius:var(--radius); padding:34px 32px; background:var(--white); }
.fit-col h3{ margin-bottom:20px; padding-bottom:16px; border-bottom:1px solid var(--grey); }
.fit-col ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:14px; }
.fit-col li{ position:relative; padding-left:28px; font-size:16px; color:var(--ink-70); }
.fit-col li::before{ position:absolute; left:0; top:0; font-family:var(--f-head); font-weight:600; }
.fit-yes li::before{ content:'✓'; color:var(--peach); }
.fit-no li::before{ content:'!'; color:var(--ink-55); }

/* ---------- accordion ---------- */
.accordion details{ border-bottom:1px solid rgba(51,51,51,.14); }
.accordion summary{
  list-style:none; cursor:pointer; padding:22px 44px 22px 0; position:relative;
  font-family:var(--f-head); font-weight:600; font-size:17.5px; line-height:1.45;
}
.accordion summary::-webkit-details-marker{ display:none; }
.accordion summary::after{
  content:''; position:absolute; right:6px; top:31px; width:11px; height:11px;
  border-right:2px solid var(--peach); border-bottom:2px solid var(--peach);
  rotate:45deg; transition:rotate .25s var(--ease);
}
.accordion details[open] summary::after{ rotate:-135deg; top:35px; }
.acc-body{ padding:0 40px 24px 0; color:var(--ink-70); font-size:16px; }
.acc-body a{ color:var(--charcoal); text-decoration-color:var(--peach); text-underline-offset:3px; }

/* ---------- form ---------- */
.cta-section{ background:linear-gradient(180deg,var(--white) 0%,var(--soft) 100%); }
.lead-form{ background:var(--white); border:1px solid var(--grey); border-radius:var(--radius); padding:40px; }
.field{ margin-bottom:20px; }
.field label{ display:block; font-size:13px; letter-spacing:.05em; text-transform:uppercase; color:var(--ink-55); margin-bottom:8px; font-weight:600; }
.field input,.field select{
  width:100%; padding:15px 18px; font-family:var(--f-body); font-size:16px; color:var(--charcoal);
  background:var(--white); border:1.5px solid var(--grey); border-radius:var(--radius-sm);
  transition:border-color .2s var(--ease);
}
.field input:focus,.field select:focus{ outline:none; border-color:var(--peach); }
.field input.is-error,.field select.is-error{ border-color:#C4553A; }
.field input::placeholder{ color:rgba(51,51,51,.32); }
.form-note{ margin-top:14px; font-size:13px; color:var(--ink-55); text-align:center; }
.form-status{ margin-top:12px; font-size:14.5px; text-align:center; min-height:1.4em; }
.form-status.ok{ color:var(--charcoal); }
.form-status.err{ color:#C4553A; }

.contact-alt{ display:flex; gap:12px; justify-content:center; margin-top:24px; flex-wrap:wrap; }
.contact-chip{
  text-decoration:none; font-family:var(--f-head); font-weight:600; font-size:14.5px;
  border:1.5px solid var(--grey); border-radius:100px; padding:11px 22px; background:var(--white);
  transition:border-color .2s var(--ease);
}
.contact-chip:hover{ border-color:var(--charcoal); }

/* ---------- footer ---------- */
.site-footer{ background:var(--charcoal); color:rgba(250,249,247,.75); padding-top:72px; margin-top:0; }
.footer-inner{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:44px; padding-bottom:56px; }
.footer-brand .logo-mark{ color:var(--white); margin-bottom:16px; }
.footer-name{ display:flex; flex-direction:column; line-height:1.15; margin-bottom:10px; }
.footer-name strong{ font-family:var(--f-head); font-weight:700; font-size:20px; letter-spacing:.1em; color:var(--white); }
.footer-name em{ font-style:normal; font-size:9px; letter-spacing:.12em; text-transform:uppercase; opacity:.6; margin-top:4px; }
.footer-tag{ font-size:14px; color:var(--peach); }
.footer-col h3{ font-size:12.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--white); margin-bottom:16px; font-weight:600; }
.footer-col p{ font-size:14.5px; margin-bottom:8px; }
.footer-col strong{ color:var(--white); font-weight:500; }
.footer-col ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; }
.footer-col a{ font-size:14.5px; text-decoration:none; transition:color .2s var(--ease); }
.footer-col a:hover{ color:var(--white); }
.footer-bottom{ border-top:1px solid rgba(250,249,247,.16); padding-block:24px 28px; }
.footer-bottom p{ font-size:13px; opacity:.7; margin:0; }

/* ---------- mobile sticky bar ---------- */
.mobile-bar{ display:none; }

/* ---------- lightbox ---------- */
.lightbox{
  position:fixed; inset:0; z-index:200; background:rgba(51,51,51,.92);
  display:grid; place-items:center; padding:32px;
}
.lightbox[hidden]{ display:none; }
.lightbox img{ max-width:min(900px,100%); max-height:90vh; width:auto; object-fit:contain; border-radius:var(--radius-sm); background:#fff; }
.lb-close{
  position:absolute; top:20px; right:24px; width:44px; height:44px; border-radius:50%;
  background:rgba(250,249,247,.14); border:1px solid rgba(250,249,247,.3); color:var(--white);
  font-size:26px; line-height:1; cursor:pointer; transition:background-color .2s var(--ease);
}
.lb-close:hover{ background:rgba(250,249,247,.26); }

/* ---------- khối cần bổ sung (XÓA TRƯỚC KHI CHẠY THẬT) ---------- */
.todo{
  margin-top:40px; border:1.5px dashed rgba(51,51,51,.35); border-radius:var(--radius);
  padding:22px 26px; background:rgba(51,51,51,.03);
}
.todo-tag{
  font-family:var(--f-head); font-size:11px; font-weight:700; letter-spacing:.14em;
  text-transform:uppercase; color:var(--charcoal); margin-bottom:8px;
}
.todo p:last-child{ font-size:14.5px; color:var(--ink-70); }
.todo code{ font-family:ui-monospace,Menlo,Consolas,monospace; font-size:13px; background:var(--grey); padding:2px 6px; border-radius:4px; }
.todo-inline{ font-style:italic; opacity:.6; }

/* ---------- reveal ---------- */
.reveal{ opacity:0; translate:0 14px; }
.reveal.is-in{ opacity:1; translate:0 0; transition:opacity .5s var(--ease), translate .5s var(--ease); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width:1080px){
  .site-nav{ gap:20px; }
  .site-nav a{ font-size:14px; }
}

@media (max-width:900px){
  :root{ --sect-y:76px; --pad:20px; }

  /* nav → drawer */
  .site-nav{
    position:fixed; inset:var(--header-h) 0 auto; flex-direction:column; gap:0;
    background:var(--white); border-bottom:1px solid var(--grey); padding:8px 20px 20px;
    margin-left:0; display:none;
  }
  .site-nav.is-open{ display:flex; }
  .site-nav a{ padding:15px 0; border-bottom:1px solid var(--grey); font-size:16px; }
  .site-nav a:last-child{ border-bottom:none; }
  .header-cta{ display:none; }
  .nav-toggle{
    display:flex; flex-direction:column; justify-content:center; gap:5px; margin-left:auto;
    width:42px; height:42px; padding:0 9px; background:none; border:none; cursor:pointer;
  }
  .nav-toggle span{ display:block; height:1.5px; background:var(--charcoal); border-radius:2px; transition:all .25s var(--ease); }
  .nav-toggle[aria-expanded="true"] span:nth-child(1){ translate:0 6.5px; rotate:45deg; }
  .nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3){ translate:0 -6.5px; rotate:-45deg; }

  .hero-grid{ grid-template-columns:1fr; gap:40px; }
  .hero-visual{ order:-1; }
  .hero-visual img{ max-width:340px; }
  .hero-ring{ width:min(300px,80%); }
  .hero-ring::after{ inset:26px; }

  .trustbar-inner{ grid-template-columns:1fr 1fr; }

  .quiz{ grid-template-columns:1fr; gap:28px; }
  .quiz-result{ position:static; }

  .grid-3{ grid-template-columns:1fr; gap:24px; }
  .roles{ grid-template-columns:1fr; gap:32px; padding-top:0; }
  .roles-line{ display:none; }
  .role-dot{ position:static; display:block; margin-bottom:14px; }

  .product-grid{ grid-template-columns:1fr; gap:40px; }
  .product-visual img{ max-width:420px; margin-inline:auto; }

  .founder-grid{ grid-template-columns:1fr; gap:44px; }
  .founder-photo img{ max-width:320px; }
  .founder-ring{ width:min(348px,100%); height:calc(100% + 36px); }
  .brand-stats{ gap:20px; }

  .gallery{ grid-template-columns:repeat(2,1fr); gap:20px; }

  .routine{ grid-template-columns:1fr; gap:20px; }
  .docs{ grid-template-columns:1fr; gap:36px; }
  .fit{ grid-template-columns:1fr; gap:20px; }

  .diagram{ padding:24px 16px; }

  .footer-inner{ grid-template-columns:1fr 1fr; gap:36px; }

  /* sticky CTA đáy */
  .mobile-bar{
    position:fixed; left:0; right:0; bottom:0; z-index:90;
    display:grid; grid-template-columns:1fr 1fr 1.5fr; gap:8px;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom));
    background:rgba(250,249,247,.94); backdrop-filter:blur(12px);
    border-top:1px solid var(--grey);
  }
  .mobile-bar-btn{
    display:flex; align-items:center; justify-content:center; text-decoration:none;
    font-family:var(--f-head); font-weight:600; font-size:14.5px;
    padding:13px 8px; border-radius:100px; border:1.5px solid var(--grey);
  }
  .mobile-bar-btn.primary{ background:var(--peach); border-color:var(--peach); color:var(--charcoal); }
  body{ padding-bottom:78px; }
  .site-footer{ padding-bottom:8px; }
}

@media (max-width:600px){
  body{ font-size:16px; }
  .section-head{ margin-bottom:36px; }
  .lede{ font-size:17px; }
  .section-sub{ font-size:16px; }
  .trustbar-inner{ grid-template-columns:1fr; }
  .specs{ grid-template-columns:1fr; }
  .lead-form{ padding:26px 22px; }
  .footer-inner{ grid-template-columns:1fr; gap:32px; }
  .check{ padding:15px 16px; }
  .check .txt{ font-size:15.5px; }
  .brand-stats{ grid-template-columns:1fr; gap:0; }
  .brand-stats > div{ display:flex; align-items:baseline; gap:16px; padding:14px 0; }
  .brand-stats dt{ margin-bottom:0; min-width:112px; }
  .brand-stats dd br{ display:none; }
  .gallery{ grid-template-columns:1fr; gap:24px; }
  .accordion summary{ font-size:16.5px; }
  .fit-col,.routine-col{ padding:26px 22px; }
}

/* ---------- a11y: giảm chuyển động ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.01ms !important; transition-duration:.01ms !important; }
  .reveal{ opacity:1; translate:none; }
}

/* ---------- print ---------- */
@media print{
  .site-header,.mobile-bar,.hero-actions,.lead-form,.contact-alt,.todo{ display:none !important; }
  body{ padding-bottom:0; }
}