/* Web manseru. Màu lấy từ app (src/lib/theme.ts, bản tối "đen nhám"): bg #151515, paper #1E1E1E, sunk #0E0E0E,
   tray #1B1B1B, ink #ECEBE7, text2 #C4C3BE, muted #8F8E89, matcha #8FB0A2, sand #C4AF8C, nhấn trắng ngà #EDEBE6.
   Phiến nổi / lòng lõm bằng đúng bộ bóng raise / insetS / groove của app. Chữ: Noto Serif (tiêu đề, ngày),
   Be Vietnam Pro (giao diện), Shippori Mincho (wordmark) như app. Chỉ có giao diện tối trên web; bản sáng xem trong máy mẫu. */
:root {
  --bg: #151515; --paper: #1e1e1e; --sunk: #0e0e0e; --tray: #1b1b1b;
  --ink: #ecebe7; --t2: #c4c3be; --mu: #8f8e89; --fa: #5f5e5a; --line: rgba(255, 255, 255, 0.07); --line2: rgba(255, 255, 255, 0.12);
  --accent: #edebe6; --matcha: #8fb0a2; --sand: #c4af8c;
  --raise: 8px 10px 26px rgba(0, 0, 0, 0.6), -6px -6px 16px rgba(255, 255, 255, 0.035), inset 1px 1px 1px rgba(255, 255, 255, 0.06);
  --raiseS: 4px 5px 14px rgba(0, 0, 0, 0.55), -4px -4px 10px rgba(255, 255, 255, 0.03), inset 1px 1px 0 rgba(255, 255, 255, 0.055);
  --insetS: inset 2px 2px 5px rgba(0, 0, 0, 0.7), inset -2px -2px 4px rgba(255, 255, 255, 0.035);
  --groove: inset 4px 4px 10px rgba(0, 0, 0, 0.7), inset 0 -3px 7px rgba(0, 0, 0, 0.55), inset -3px -3px 8px rgba(255, 255, 255, 0.035);
  --sheen: linear-gradient(180deg, rgba(255, 255, 255, 0.045) 0%, rgba(255, 255, 255, 0) 55%);
  --serif: 'Noto Serif', Georgia, 'Times New Roman', serif;
  --sans: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mark: 'Shippori Mincho', 'Noto Serif', serif;
  --r: 22px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 300 16px/1.7 var(--sans); overflow-x: hidden; -webkit-font-smoothing: antialiased; }
img, svg { display: block; max-width: 100%; }
a { color: var(--ink); text-decoration-color: var(--fa); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }
b, strong { font-weight: 500; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .wrap { padding: 0 32px; } }
.skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--paper); padding: 10px 14px; border-radius: 10px; }
.skip:focus { left: 8px; }
svg.i { width: 20px; height: 20px; flex: none; }

/* ── Đầu trang ── */
.top { position: sticky; top: 0; z-index: 20; background: rgba(21, 21, 21, 0.86); -webkit-backdrop-filter: saturate(140%) blur(14px); backdrop-filter: saturate(140%) blur(14px); box-shadow: 0 1px 0 var(--line); }
.top-in { display: flex; align-items: center; gap: 10px; min-height: 64px; }
.mark { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; min-width: 0; text-decoration: none; font: 500 22px/1 var(--mark); letter-spacing: 0.04em; color: var(--ink); }
.logo { width: 30px; height: 30px; flex: none; color: var(--ink); }
.anchors { display: none; margin-left: auto; gap: 2px; }
.anchors a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; color: var(--t2); text-decoration: none; font-size: 14.5px; font-weight: 400; border-radius: 12px; }
.anchors a:hover { color: var(--ink); background: var(--paper); box-shadow: var(--raiseS); }
.lang { margin-left: auto; flex: none; display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 44px; min-width: 44px; padding: 0 12px; border-radius: 14px; background: var(--paper); box-shadow: var(--raiseS); text-decoration: none; font-size: 13px; font-weight: 500; letter-spacing: 0.08em; color: var(--ink); }
.lang .i { width: 16px; height: 16px; color: var(--mu); }
.open { flex: none; display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border-radius: 14px; background: var(--accent); color: var(--bg); text-decoration: none; font-size: 14px; font-weight: 500; box-shadow: var(--raiseS); }
.open:hover { background: #fff; }
@media (min-width: 960px) { .anchors { display: flex; } .lang { margin-left: 8px; } }
@media (max-width: 359px) { .mark span { display: none; } }

/* ── Chữ dùng chung ── */
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 400; letter-spacing: -0.005em; line-height: 1.18; }
h1 em, h2 em { font-style: italic; color: var(--sand); }
.kicker { margin: 0 0 14px; font-size: 11.5px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--mu); font-weight: 500; }
.lead { font-size: 18px; color: var(--t2); margin: 20px 0 0; max-width: 34em; }
.sec-h { max-width: 700px; margin-bottom: 36px; }
.sec-h h2 { font-size: clamp(30px, 5vw, 46px); }
.sec-h p:not(.kicker) { color: var(--t2); font-size: 17px; margin: 14px 0 0; }

/* ── Nút: phiến gốm nổi như nút "Hôm nay" trong app ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; padding: 0 22px; border-radius: 16px; font: 500 15.5px/1.2 var(--sans); text-decoration: none; cursor: pointer; text-align: center; transition: transform 0.15s, background-color 0.15s; }
.btn .i { width: 19px; height: 19px; }
.btn:active { transform: scale(0.98); }
.btn.primary { background: var(--accent); color: var(--bg); box-shadow: var(--raise); }
.btn.primary:hover { background: #fff; }
.btn.ghost { background: var(--paper); color: var(--ink); box-shadow: var(--raiseS); }
.btn.ghost:hover { background: #232323; }
.btn[aria-disabled='true'] { cursor: default; color: var(--mu); background: var(--tray); box-shadow: var(--insetS); }
.btn[aria-disabled='true']:active { transform: none; }
.ctas { display: flex; flex-wrap: wrap; gap: 14px; margin: 32px 0 0; }

/* ── Hero ── */
.hero { display: grid; gap: 40px; padding-top: 48px; padding-bottom: 32px; align-items: center; }
.hero h1 { font-size: clamp(40px, 10vw, 64px); line-height: 1.08; letter-spacing: -0.015em; }
.hero-copy, .hero-art { min-width: 0; }
.hero-art { position: relative; display: grid; justify-items: center; }
.hero-art::before { content: ''; position: absolute; inset: 4% 4% 12%; border-radius: 48px; background: var(--tray); box-shadow: var(--groove); pointer-events: none; }
.hero-art .phf { margin: 28px 0 0; }
.fine { display: flex; gap: 10px; align-items: flex-start; margin: 22px 0 0; font-size: 13.5px; color: var(--t2); max-width: 32em; }
.fine .i { width: 17px; height: 17px; margin-top: 3px; color: var(--mu); }
.demo-hint { position: relative; display: flex; gap: 10px; align-items: flex-start; max-width: 330px; margin: 22px auto 0; font-size: 13px; line-height: 1.55; color: var(--t2); }
.demo-hint .i { width: 17px; height: 17px; margin-top: 2px; color: var(--mu); }
@media (min-width: 960px) {
  .hero { grid-template-columns: 1.05fr 0.95fr; padding-top: 72px; padding-bottom: 56px; gap: 56px; }
}

.facts { list-style: none; margin: 8px 0 0; padding: 0; display: grid; grid-template-columns: 1fr; border-radius: var(--r); background: var(--paper); background-image: var(--sheen); box-shadow: var(--raise); overflow: hidden; }
.facts li { padding: 18px 22px; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.facts li + li { box-shadow: inset 0 1px 0 var(--line); }
.facts b { font: 400 24px/1.15 var(--serif); }
.facts span { color: var(--t2); font-size: 14px; }
@media (min-width: 768px) { .facts { grid-template-columns: repeat(3, 1fr); } .facts li { display: grid; gap: 4px; padding: 22px 26px; } .facts li + li { box-shadow: inset 1px 0 0 var(--line); } }

/* ── Cách dùng ── */
.how { padding-top: 96px; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.steps li { position: relative; padding: 26px 24px 24px; border-radius: var(--r); background: var(--tray); box-shadow: var(--groove); }
.steps .num { display: block; margin-bottom: 16px; font: 400 15px/1 var(--serif); color: var(--sand); letter-spacing: 0.08em; }
.steps h3 { font-size: 22px; }
.steps p { margin: 10px 0 0; color: var(--t2); font-size: 15px; }
@media (min-width: 860px) { .steps { grid-template-columns: repeat(3, 1fr); gap: 22px; } }

/* ── Dải tính năng: khay lõm chứa các phiến nổi ── */
.band { margin-top: 96px; padding: 80px 0; background: var(--tray); box-shadow: inset 0 10px 24px rgba(0, 0, 0, 0.45), inset 0 -10px 24px rgba(0, 0, 0, 0.4); }
.grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1040px) { .grid { grid-template-columns: repeat(4, 1fr); } }
.card { padding: 24px 22px 22px; border-radius: var(--r); background: var(--paper); background-image: var(--sheen); box-shadow: var(--raise); }
.card h3 { font-size: 19px; line-height: 1.3; margin-top: 18px; }
.card p { margin: 10px 0 0; font-size: 14.5px; line-height: 1.65; color: var(--t2); }
.ico { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; background: var(--sunk); box-shadow: var(--insetS); color: var(--accent); }
.ico .i { width: 21px; height: 21px; }
.more { margin: 34px 0 0; }
.grid.flat .card { background: transparent; box-shadow: inset 0 0 0 1px var(--line); }

/* ── Chi tiết + điện thoại ── */
.details { display: grid; gap: 96px; padding-top: 96px; }
.detail { display: grid; gap: 36px; align-items: center; }
.detail h3 { font-size: clamp(28px, 4.4vw, 40px); }
.d-copy { min-width: 0; }
.d-copy > p:not(.kicker) { color: var(--t2); font-size: 16.5px; margin: 16px 0 0; max-width: 34em; }
.d-art { margin: 0; min-width: 0; display: grid; justify-items: center; gap: 16px; }
.d-art figcaption { max-width: 320px; font-size: 13px; line-height: 1.5; color: var(--mu); text-align: center; }
.detail.solo { max-width: 760px; }
@media (min-width: 900px) {
  .detail { grid-template-columns: 1.1fr 0.9fr; gap: 64px; }
  .detail.flip .d-copy { order: 2; }
  .detail.solo { grid-template-columns: 1fr; }
}
.ticks { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 12px; }
.ticks li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--t2); }
.ticks .i { width: 19px; height: 19px; margin-top: 3px; color: var(--matcha); }

/* ── Riêng tư, hỏi đáp, cuối trang ── */
.priv { padding-top: 96px; }
.faq { padding-top: 96px; }
.qa { display: grid; gap: 12px; max-width: 820px; }
.qa details { border-radius: 18px; background: var(--paper); box-shadow: var(--raiseS); }
.qa summary { list-style: none; display: flex; gap: 16px; align-items: center; justify-content: space-between; min-height: 60px; padding: 14px 20px; cursor: pointer; font: 400 17px/1.4 var(--serif); }
.qa summary::-webkit-details-marker { display: none; }
.qa summary .i { width: 18px; height: 18px; color: var(--mu); transition: transform 0.2s; }
.qa details[open] summary .i { transform: rotate(180deg); }
.qa details p { margin: 0; padding: 0 20px 20px; color: var(--t2); font-size: 15px; }
.final { display: grid; justify-items: center; text-align: center; padding-top: 110px; padding-bottom: 110px; }
.final img { width: 72px; height: 72px; border-radius: 18px; box-shadow: var(--raise); }
.final h2 { margin-top: 26px; font-size: clamp(34px, 6vw, 54px); }
.final p { margin: 16px 0 0; color: var(--t2); max-width: 30em; }
.final .ctas { justify-content: center; }

/* ── Chân trang ── */
.foot { padding: 44px 0 52px; box-shadow: inset 0 1px 0 var(--line); }
.foot-in { display: grid; gap: 18px; }
.foot-brand { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.foot-brand p { margin: 0; color: var(--mu); font-size: 13.5px; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 4px 2px; margin-left: -10px; }
.foot-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 10px; color: var(--t2); text-decoration: none; font-size: 14px; }
.foot-nav a:hover { color: var(--ink); }
.foot-note, .foot-copy { margin: 0; color: var(--mu); font-size: 13px; max-width: 56em; }
.foot-copy a { color: var(--mu); }

/* ── Trang tài liệu ── */
.doc-wrap { max-width: 860px; padding-top: 32px; padding-bottom: 80px; }
.back { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 14px 0 8px; border-radius: 14px; background: var(--paper); box-shadow: var(--raiseS); color: var(--t2); text-decoration: none; font-size: 14px; }
.back .i { width: 18px; height: 18px; }
.doc { margin-top: 28px; }
.doc .meta { margin: 0; font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--mu); }
.doc h1 { font-size: clamp(32px, 6vw, 46px); margin: 10px 0 8px; }
.doc h2 { font-size: 22px; margin: 40px 0 12px; }
.doc h3 { font-size: 17px; margin: 26px 0 6px; font-weight: 500; }
.doc p, .doc li { color: var(--t2); font-size: 15.5px; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc b { color: var(--ink); }
.summary { margin: 24px 0 8px; padding: 18px 22px 10px; border-radius: 18px; background: var(--tray); box-shadow: var(--groove); }
.summary h2 { margin: 0 0 6px; font: 500 12px/1.4 var(--sans); letter-spacing: 0.16em; text-transform: uppercase; color: var(--mu); }
.contact { margin: 22px 0; padding: 18px 22px; border-radius: 18px; background: var(--paper); box-shadow: var(--raiseS); }
.contact a { font: 400 20px/1.4 var(--serif); }
.tw { overflow-x: auto; margin: 14px 0; border-radius: 16px; background: var(--paper); box-shadow: var(--raiseS); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 11px 14px; text-align: left; vertical-align: top; box-shadow: inset 0 -1px 0 var(--line); }
th { font-weight: 500; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--mu); }
td { color: var(--t2); }
td:first-child { color: var(--ink); white-space: nowrap; }
/* Điện thoại: mỗi dòng bảng thành một thẻ, nhãn cột đứng trước ô */
@media (max-width: 640px) {
  .tw { background: none; box-shadow: none; overflow: visible; }
  table, tbody, tr, td { display: block; }
  thead { display: none; }
  tr { margin: 0 0 12px; padding: 12px 16px; border-radius: 16px; background: var(--paper); box-shadow: var(--raiseS); }
  td { padding: 4px 0; box-shadow: none; white-space: normal !important; }
  td::before { content: attr(data-label); display: block; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--mu); }
}

/* ── 404 ── */
.nf { display: grid; justify-items: start; padding-top: 80px; padding-bottom: 120px; max-width: 760px; }
.nf .logo { width: 88px; height: 88px; margin-bottom: 24px; color: var(--t2); }
.nf h1 { font-size: clamp(34px, 6vw, 52px); }

@media print {
  .top, .foot, .back, .hero-art, .ctas { display: none; }
  body { background: #fff; color: #000; }
  .doc p, .doc li, td { color: #000; }
}