/* ============================================================================
   Manusora — Website công khai
   ----------------------------------------------------------------------------
   Bảng màu earth/sage lấy thẳng từ app (UI/v2/css/main.css). Họa tiết theo
   phong cách truyền thống Việt Nam: vân mây, mặt trống đồng Đông Sơn, hồi văn,
   hoa sen. Nhân vật Mây (mascot) là điểm nhấn xuyên suốt.
   ============================================================================ */

/* ----- 1. Design tokens -------------------------------------------------- */
:root {
  /* Surface — earth/sage giữ nguyên từ app */
  --bg:          #f5f4ef;
  --bg-soft:     #efeee7;
  --bg-mute:     #e9e7dd;
  --panel:       #fbfaf6;
  --panel-2:     #ffffff;
  --dark:        #232b2f;
  --dark-2:      #1d2427;

  /* Ink */
  --ink:         #1c2226;
  --ink-2:       #4a565d;
  --ink-3:       #76838b;
  --ink-inv:     #f3f6f4;

  /* Accent — xanh rêu/sage */
  --teal-900:    #2f4b40;
  --teal-700:    #5D7B6F;
  --teal-600:    #6a8b7d;
  --teal-500:    #A4C3A2;
  --teal-300:    #c5dbc4;
  --mint:        #B0D4B8;
  --sand:        #EAE7D6;

  /* Nhấn truyền thống */
  --amber:       #b18532;
  --amber-soft:  #f6efd8;
  --terra:       #b04a44;

  /* Đường nét */
  --line:        #e1dfd3;
  --line-strong: #c9c7b9;

  /* Spacing — 4px grid */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-7: 32px; --sp-8: 48px; --sp-9: 72px;

  /* Radius */
  --r-sm: 8px; --r-md: 14px; --r-lg: 20px; --r-pill: 999px;

  /* Shadow */
  --shadow-1: 0 1px 2px rgba(18,28,32,.05), 0 4px 12px rgba(18,28,32,.06);
  --shadow-2: 0 2px 6px rgba(18,28,32,.07), 0 16px 38px rgba(18,28,32,.10);
  --shadow-3: 0 8px 24px rgba(18,28,32,.12), 0 32px 64px rgba(47,75,64,.16);

  /* Type */
  --font-sans:  "Be Vietnam Pro", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --font-serif: "Noto Serif", "Cambria", "Palatino Linotype", Georgia, serif;

  /* Motion */
  --ease: cubic-bezier(.16,1,.3,1);

  /* Layout */
  --maxw: 1140px;
  --header-h: 68px;
}

/* ----- 2. Reset ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--teal-700); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--teal-900); }
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 700; line-height: 1.25; color: var(--teal-900); margin: 0; }
p { margin: 0 0 var(--sp-4); }
ul { margin: 0; padding: 0; }
:focus-visible { outline: 3px solid rgba(93,123,111,.45); outline-offset: 2px; border-radius: 4px; }

/* ----- 3. Layout helpers ------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--sp-6); }
.section { padding: var(--sp-9) 0; }
.section--mute { background: var(--bg-soft); }
.section--dark { background: var(--dark); color: var(--ink-inv); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }
.section-head { max-width: 680px; margin: 0 auto var(--sp-8); text-align: center; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: var(--sp-3); }
.section-head p { color: var(--ink-2); font-size: 17px; margin: 0; }
.section--dark .section-head p { color: var(--teal-300); }

.eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-family: var(--font-sans); font-size: 13px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--teal-700); margin-bottom: var(--sp-3);
}
.eyebrow::before, .eyebrow::after {
  content: ""; width: 26px; height: 1px; background: var(--teal-500);
}
.eyebrow--solo::after { display: none; }

/* ----- 4. Motif: vân mây divider ---------------------------------------- */
.may-divider {
  height: 64px;
  background: url("../assets/motifs/van-may.svg") repeat-x center;
  background-size: auto 64px;
}
.may-divider--flip { transform: scaleY(-1); }

/* Hồi văn key-fret strip — tô màu qua background, hình lấy từ mask */
.hoi-van {
  height: 24px;
  background: var(--teal-500);
  -webkit-mask: url("../assets/motifs/hoi-van.svg") repeat-x center / auto 24px;
  mask: url("../assets/motifs/hoi-van.svg") repeat-x center / auto 24px;
  opacity: .85;
}

/* Hoa sen bullet */
.lotus-list { list-style: none; }
.lotus-list li {
  position: relative; padding-left: 30px; margin-bottom: var(--sp-3);
  color: var(--ink-2);
}
.lotus-list li::before {
  content: ""; position: absolute; left: 0; top: 4px;
  width: 18px; height: 14px;
  background: var(--teal-700);
  -webkit-mask: url("../assets/motifs/hoa-sen.svg") no-repeat center / contain;
  mask: url("../assets/motifs/hoa-sen.svg") no-repeat center / contain;
}

/* ----- 5. Header / nav --------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245,244,239,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  height: var(--header-h);
  display: flex; align-items: center; gap: var(--sp-6);
}
.brand { display: flex; align-items: center; gap: var(--sp-3); }
.brand img { width: 38px; height: 38px; border-radius: 11px; }
.brand-name { font-family: var(--font-serif); font-weight: 700; font-size: 19px; color: var(--teal-900); }
.brand-sub { display: block; font-family: var(--font-sans); font-size: 11px;
  font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--teal-700); }
.nav-links { display: flex; align-items: center; gap: var(--sp-2); margin-left: auto; }
.nav-links a {
  font-size: 15px; font-weight: 600; color: var(--ink-2);
  padding: var(--sp-2) var(--sp-3); border-radius: var(--r-sm);
}
.nav-links a:hover { color: var(--teal-900); background: var(--bg-mute); }
.nav-links a.is-active { color: var(--teal-900); background: var(--teal-300); }
.nav-cta { margin-left: var(--sp-2); }
.nav-toggle {
  display: none; margin-left: auto;
  width: 42px; height: 42px; border: 1px solid var(--line-strong);
  border-radius: var(--r-sm); background: var(--panel); cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 18px; height: 2px;
  background: var(--teal-900); margin: 0 auto; position: relative;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after  { position: absolute; top: 6px; }

/* ----- 6. Buttons -------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  font-family: var(--font-sans); font-size: 15px; font-weight: 700;
  padding: 13px 24px; border-radius: var(--r-pill);
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .12s var(--ease), box-shadow .15s var(--ease), background .15s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--teal-700); color: #fff; box-shadow: var(--shadow-1); }
.btn-primary:hover { background: var(--teal-900); color: #fff; box-shadow: var(--shadow-2); }
.btn-ghost { background: transparent; color: var(--teal-900); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--panel); border-color: var(--teal-600); color: var(--teal-900); }
.btn-amber { background: var(--amber); color: #fff; box-shadow: var(--shadow-1); }
.btn-amber:hover { background: #946d23; color: #fff; }
.btn-lg { font-size: 16px; padding: 16px 30px; }
.btn-block { width: 100%; }
.btn-on-dark { background: var(--mint); color: var(--teal-900); }
.btn-on-dark:hover { background: #c6e3cc; color: var(--teal-900); }
.btn.is-disabled {
  background: var(--line-strong); color: var(--ink-3);
  box-shadow: none; cursor: default; pointer-events: none;
}
.btn.is-disabled:hover { transform: none; }

/* ----- 7. Hero — nền bầu trời sao động ---------------------------------- */
.hero {
  position: relative; overflow: hidden;
  background: #1f312c;            /* dự phòng dưới canvas */
  padding: var(--sp-9) 0;
}
/* Canvas vẽ bầu trời sao, phủ kín hero, nằm dưới nội dung */
.hero-sky {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block; z-index: 0;
}
.hero > .container { position: relative; z-index: 1; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: var(--sp-8); align-items: center;
}
.hero h1 { font-size: clamp(34px, 5vw, 56px); letter-spacing: -.01em; color: #f6f5ef; }
.hero h1 .accent { color: #e7c987; }
.hero-lead { font-size: 19px; color: rgba(243,243,236,.86); margin: var(--sp-5) 0 var(--sp-6); max-width: 33em; }
.hero-lead strong { color: #fff; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); }
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--sp-5); margin-top: var(--sp-7); }
.hero-meta div { display: flex; flex-direction: column; }
.hero-meta b { font-family: var(--font-serif); font-size: 22px; color: #fff; }
.hero-meta span { font-size: 13px; color: var(--teal-300); }
/* Chữ phụ trên nền sao */
.hero .eyebrow { color: var(--teal-300); }
.hero .eyebrow::before, .hero .eyebrow::after { background: var(--teal-500); }
.hero .btn-ghost {
  background: rgba(255,255,255,.08);
  color: #f3f3ec; border-color: rgba(255,255,255,.42);
}
.hero .btn-ghost:hover {
  background: rgba(255,255,255,.18);
  border-color: #fff; color: #fff;
}

/* Mây + trống đồng */
.hero-art { position: relative; display: grid; place-items: center; min-height: 420px; }
.drum {
  position: absolute; width: min(94%, 440px); aspect-ratio: 1;
  color: var(--teal-500); opacity: .55;
  animation: drum-spin 90s linear infinite;
}
.drum-glow {
  position: absolute; width: 70%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, rgba(176,212,184,.55), transparent 68%);
}
@keyframes drum-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .drum { animation: none; } }
.may {
  position: relative; z-index: 2;
  width: min(78%, 340px);
  filter: drop-shadow(0 24px 34px rgba(47,75,64,.28));
}
.may-bubble {
  position: absolute; z-index: 3; top: 8%; right: 2%;
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: var(--r-md) var(--r-md) var(--r-md) 4px;
  padding: var(--sp-3) var(--sp-4); box-shadow: var(--shadow-2);
  font-size: 14px; font-weight: 600; color: var(--teal-900); max-width: 200px;
}
.may-bubble small { display: block; font-weight: 500; color: var(--ink-3); font-size: 12px; }

/* ----- 8. Cards ---------------------------------------------------------- */
.grid { display: grid; gap: var(--sp-5); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r-md); padding: var(--sp-6);
  box-shadow: var(--shadow-1); transition: transform .15s var(--ease), box-shadow .15s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: var(--sp-4);
  background: var(--teal-300); color: var(--teal-900);
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 19px; margin-bottom: var(--sp-2); }
.card p { color: var(--ink-2); font-size: 15px; margin: 0; }
.card--feature { padding: var(--sp-7); }

/* Step card (workflow) */
.steps { counter-reset: step; }
.step { position: relative; padding-left: 64px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--teal-700); color: #fff;
  font-family: var(--font-serif); font-size: 20px; font-weight: 700;
  display: grid; place-items: center;
}
.step h3 { font-size: 18px; margin-bottom: var(--sp-1); }
.step p { color: var(--ink-2); font-size: 15px; margin: 0; }

/* ----- 9. Pricing -------------------------------------------------------- */
.price-card {
  text-align: center; position: relative;
  display: flex; flex-direction: column;
}
.price-card.is-featured {
  border-color: var(--teal-600); box-shadow: var(--shadow-2);
}
/* Nút luôn nằm sát đáy thẻ — các gói thẳng hàng dù danh sách dài ngắn khác nhau */
.price-card .btn-block { margin-top: auto; }
.price-tag {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--amber); color: #fff; font-size: 12px; font-weight: 700;
  padding: 4px 14px; border-radius: var(--r-pill); letter-spacing: .04em;
}
.price-card h3 { font-size: 20px; }
.price-amount { font-family: var(--font-serif); font-size: 38px; color: var(--teal-900); margin: var(--sp-3) 0; }
.price-amount span { font-family: var(--font-sans); font-size: 15px; color: var(--ink-3); font-weight: 500; }
.price-card .lotus-list { text-align: left; margin: var(--sp-5) 0; }

/* ----- 10. Download ------------------------------------------------------ */
.download-card {
  display: grid; grid-template-columns: auto 1fr auto; gap: var(--sp-6);
  align-items: center;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: var(--sp-7);
  box-shadow: var(--shadow-2);
}
.download-os {
  width: 76px; height: 76px; border-radius: var(--r-md);
  background: var(--teal-900); color: var(--mint);
  display: grid; place-items: center;
}
.download-os svg { width: 40px; height: 40px; }
.download-card h3 { font-size: 22px; }
.download-meta { font-size: 14px; color: var(--ink-3); margin-top: var(--sp-1); }
.download-meta b { color: var(--teal-700); }
.badge-row { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-3); }
.badge {
  font-size: 12px; font-weight: 600; padding: 3px 10px;
  border-radius: var(--r-pill); background: var(--bg-mute); color: var(--ink-2);
}
.badge--ok { background: var(--teal-300); color: var(--teal-900); }

.note {
  border-left: 3px solid var(--amber);
  background: var(--amber-soft); border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: var(--sp-4) var(--sp-5); font-size: 14px; color: #6b541f;
}
.note b { color: #4f3d12; }

/* ----- 11. FAQ ----------------------------------------------------------- */
.faq-item {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r-md); margin-bottom: var(--sp-3);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer; list-style: none; padding: var(--sp-5) var(--sp-6);
  font-family: var(--font-serif); font-weight: 700; font-size: 17px;
  color: var(--teal-900); display: flex; justify-content: space-between; gap: var(--sp-4);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-family: var(--font-sans); font-size: 22px;
  color: var(--teal-600); transition: transform .2s var(--ease);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 var(--sp-6) var(--sp-5); color: var(--ink-2); }
.faq-item .faq-body p:last-child { margin-bottom: 0; }

/* ----- 12. Showcase / screenshot --------------------------------------- */
.shot {
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--panel-2); box-shadow: var(--shadow-2);
  overflow: hidden;
}
.shot-bar {
  display: flex; gap: 6px; padding: 10px var(--sp-4);
  background: var(--bg-mute); border-bottom: 1px solid var(--line);
}
.shot-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); }
.shot-body { padding: var(--sp-6); }

/* CTA banner with Mây */
.cta-banner {
  position: relative; overflow: hidden;
  background: var(--teal-900); color: var(--ink-inv);
  border-radius: var(--r-lg); padding: var(--sp-9) var(--sp-8);
  text-align: center;
}
.cta-banner h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); }
.cta-banner p { color: var(--teal-300); font-size: 17px; max-width: 36em; margin: var(--sp-3) auto var(--sp-6); }
.cta-banner .drum {
  color: var(--teal-700); opacity: .35;
  width: 360px; top: -120px; right: -90px; left: auto; bottom: auto;
}
.cta-banner-may {
  position: absolute; bottom: -10px; left: 24px; width: 130px;
  filter: drop-shadow(0 10px 18px rgba(0,0,0,.3));
}

/* ----- 13. Footer -------------------------------------------------------- */
.site-footer { background: var(--dark-2); color: var(--teal-300); }
.footer-top { padding: var(--sp-9) 0 var(--sp-7); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--sp-7); }
.footer-brand p { color: #9fb0a8; font-size: 14px; max-width: 30em; margin-top: var(--sp-3); }
.footer-col h4 { color: #fff; font-family: var(--font-sans); font-size: 14px;
  letter-spacing: .06em; text-transform: uppercase; margin-bottom: var(--sp-4); }
.footer-col a { display: block; color: var(--teal-300); font-size: 15px; padding: 5px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: var(--sp-5) 0; font-size: 13px; color: #8b9c94;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-3);
}

/* ----- 14. Page hero (trang phụ) ---------------------------------------- */
.page-hero { background: var(--bg-soft); padding: var(--sp-9) 0 var(--sp-8); text-align: center; }
.page-hero h1 { font-size: clamp(30px, 4vw, 46px); margin-bottom: var(--sp-3); }
.page-hero p { font-size: 18px; color: var(--ink-2); max-width: 42em; margin: 0 auto; }

/* Prose (trang pháp lý) */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { font-size: 24px; margin: var(--sp-8) 0 var(--sp-3); }
.prose h3 { font-size: 18px; margin: var(--sp-6) 0 var(--sp-2); }
.prose p, .prose li { color: var(--ink-2); }
.prose ul { padding-left: 22px; list-style: disc; margin-bottom: var(--sp-4); }
.prose table { width: 100%; border-collapse: collapse; margin: var(--sp-4) 0; }
.prose th, .prose td {
  text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line);
  font-size: 14px; vertical-align: top;
}
.prose th { background: var(--bg-mute); color: var(--teal-900); }
.legal-toc {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r-md); padding: var(--sp-5) var(--sp-6); margin-bottom: var(--sp-7);
}
.legal-toc strong { display: block; margin-bottom: var(--sp-2); color: var(--teal-900); }
.legal-meta { color: var(--ink-3); font-size: 14px; margin-bottom: var(--sp-6); }

/* ----- 15. Reveal-on-scroll --------------------------------------------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ----- 16b. Nền động — họa tiết trống đồng Đông Sơn --------------------- */
/* Lớp nền cố định nằm dưới nội dung; hiện qua các mục có nền trong suốt. */
.bg-decor {
  position: fixed; inset: 0; z-index: 0;
  overflow: hidden; pointer-events: none;
}
.bg-motif {
  position: absolute; display: block;
  transition: transform .7s var(--ease);
  will-change: transform;
}
.bg-motif img {
  display: block; width: 100%; height: 100%;
  animation: motif-spin var(--spin, 140s) linear infinite;
}
.bg-motif--rev img { animation-direction: reverse; }
@keyframes motif-spin {
  0%   { transform: rotate(0deg)   translateY(0); }
  50%  { transform: rotate(180deg) translateY(-16px); }
  100% { transform: rotate(360deg) translateY(0); }
}
/* Vị trí + kích thước từng họa tiết trống đồng */
.bg-motif.m1 { width: 270px; height: 270px; top: 5%;  left: -70px;  opacity: .11; --spin: 155s; }
.bg-motif.m2 { width: 180px; height: 180px; top: 28%; right: -46px; opacity: .09; --spin: 115s; }
.bg-motif.m3 { width: 360px; height: 360px; top: 55%; left: -130px; opacity: .07; --spin: 210s; }
.bg-motif.m4 { width: 150px; height: 150px; top: 73%; right: 7%;    opacity: .11; --spin: 95s;  }
.bg-motif.m5 { width: 124px; height: 124px; top: 11%; left: 47%;    opacity: .08; --spin: 135s; }
.bg-motif.m6 { width: 230px; height: 230px; top: 87%; left: 28%;    opacity: .08; --spin: 175s; }

/* Nội dung nổi trên lớp nền động */
main, .site-footer { position: relative; z-index: 1; }

@media (prefers-reduced-motion: reduce) {
  .bg-motif img { animation: none; }
  .bg-motif { transition: none; }
}

/* ----- 16. Responsive ---------------------------------------------------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-lead { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-meta { justify-content: center; }
  .hero-art { order: -1; min-height: 320px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--panel); border-bottom: 1px solid var(--line);
    padding: var(--sp-3); box-shadow: var(--shadow-2);
    transform: translateY(-130%); transition: transform .25s var(--ease);
  }
  .nav-links.is-open { transform: none; }
  .nav-links a { padding: var(--sp-3) var(--sp-4); }
  .nav-cta { margin: var(--sp-2) 0 0; }
  .nav-toggle { display: block; }
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .download-card { grid-template-columns: 1fr; text-align: center; }
  .download-os { margin: 0 auto; }
  .badge-row { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .section { padding: var(--sp-8) 0; }
  .cta-banner-may { display: none; }
  .bg-motif.m3, .bg-motif.m5 { display: none; }
  /* Bong bóng thoại của Mây: bỏ định vị tuyệt đối để khỏi đè lên mặt,
     đưa lên thành banner phía trên nhân vật. */
  .may-bubble {
    position: relative; top: auto; right: auto;
    margin: 0 auto var(--sp-4); max-width: min(88%, 300px);
    text-align: center;
    border-radius: var(--r-md);
  }
}

/* ============================================================================
   17. Thần thoại — sơn mài & vàng son · thủy mặc (pha trộn)
   ----------------------------------------------------------------------------
   Hero & CTA: nền sơn mài thẫm, nhấn vàng son, rồng thời Lý. Các mục nội dung:
   không khí thủy mặc — sương mờ, dải núi & sóng cách điệu.
   ========================================================================= */
:root {
  --lacquer:   #131f1b;   /* nền sơn mài thẫm */
  --lacquer-2: #1d2c27;
  --gold:      #d9b75e;   /* vàng son */
  --gold-soft: #eccf8d;
  --gold-deep: #b08b39;
  --gold-line: rgba(217,183,94,.34);
  --son:       #c5503f;   /* son đỏ điểm xuyết */
}

/* ----- Hero: sơn mài & vàng son ----------------------------------------- */
.hero {
  background: linear-gradient(180deg, var(--lacquer) 0%, #1a2a24 56%, #3a5848 100%);
  padding-bottom: 208px;   /* chừa chỗ cho dải núi vẽ trong canvas */
}
.hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  z-index: 2;
  background: linear-gradient(90deg, transparent, var(--gold) 22%, var(--gold-soft) 50%, var(--gold) 78%, transparent);
  opacity: .6;
}
.hero h1 .accent { color: var(--gold-soft); }
.hero .eyebrow { color: var(--gold-soft); }
.hero .eyebrow::before, .hero .eyebrow::after { background: var(--gold); }
.hero-meta b { color: var(--gold-soft); }
.hero-meta div { position: relative; padding-left: 14px; }
.hero-meta div::before {
  content: ""; position: absolute; left: 0; top: 4px; bottom: 4px; width: 2px;
  background: var(--gold); opacity: .55; border-radius: 2px;
}
.btn-gold { background: var(--gold); color: #2a2008; box-shadow: var(--shadow-1); }
.btn-gold:hover { background: var(--gold-soft); color: #2a2008; box-shadow: var(--shadow-2); }

/* Rồng vàng — ảnh minh hoạ, bay lượn phía dưới Mây, chừa chỗ cho mặt trăng. */
.hero-dragon {
  position: absolute; z-index: 0; pointer-events: none;
  width: min(44vw, 430px);
  aspect-ratio: 912 / 1121;
  right: 1%; top: 50%;
  background: url("../assets/motifs/rong-vang.png") no-repeat center / contain;
  filter: drop-shadow(0 14px 30px rgba(0,0,0,.32));
  opacity: .52;
  transform: rotate(-13deg);   /* nền tĩnh, dùng khi tắt chuyển động */
  animation: dragon-float 18s ease-in-out infinite;
}
/* Nghiêng nhẹ cho dáng bay; gồm cả độ nghiêng nền trong keyframe. */
@keyframes dragon-float {
  0%, 100% { transform: rotate(-13deg) translateY(0); }
  50%      { transform: rotate(-14.5deg) translateY(-12px); }
}
.drum { color: var(--gold); }

/* ----- Dải ngăn mục: núi-mây & sóng nước -------------------------------- */
.divider-nui, .divider-song {
  display: block; width: 100%; pointer-events: none;
}
.divider-nui {
  height: 116px;
  background-color: var(--teal-600);
  -webkit-mask: url("../assets/motifs/nui-may.svg") no-repeat bottom center / cover;
  mask: url("../assets/motifs/nui-may.svg") no-repeat bottom center / cover;
  opacity: .8;
}
.divider-nui--soft { background-color: var(--teal-500); opacity: .6; }
.divider-song {
  height: 56px;
  background-color: var(--teal-500);
  -webkit-mask: url("../assets/motifs/song-nuoc.svg") repeat-x center / auto 100%;
  mask: url("../assets/motifs/song-nuoc.svg") repeat-x center / auto 100%;
  opacity: .7;
}
.divider-song--gold { background-color: var(--gold); opacity: .55; }

/* ----- Họa tiết chim Lạc / phượng (trang trí góc) ----------------------- */
.motif-bird {
  position: absolute; pointer-events: none; z-index: 0;
  background-color: var(--teal-500);
  opacity: .16;
}
.motif-bird--lac {
  width: 150px; height: 94px;
  -webkit-mask: url("../assets/motifs/chim-lac.svg") no-repeat center / contain;
  mask: url("../assets/motifs/chim-lac.svg") no-repeat center / contain;
}
.motif-bird--phuong {
  width: 156px; height: 120px;
  -webkit-mask: url("../assets/motifs/phuong.svg") no-repeat center / contain;
  mask: url("../assets/motifs/phuong.svg") no-repeat center / contain;
}
.section { position: relative; overflow: hidden; }
.section > .container { position: relative; z-index: 1; }

/* ----- Thủy mặc: sương mờ cho mục nội dung ------------------------------ */
.section--ink::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 70%;
  background: radial-gradient(120% 80% at 50% 0%, rgba(255,255,255,.7), transparent 70%);
  pointer-events: none;
}
.section--ink::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 140px;
  background-color: var(--teal-500);
  -webkit-mask: url("../assets/motifs/nui-may.svg") no-repeat bottom center / cover;
  mask: url("../assets/motifs/nui-may.svg") no-repeat bottom center / cover;
  opacity: .12; pointer-events: none;
}

/* ----- Thẻ: nhấn vàng son khi hover ------------------------------------- */
.card { position: relative; }
.card::after {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-soft), var(--gold-deep));
  border-radius: var(--r-md) var(--r-md) 0 0;
  opacity: 0; transition: opacity .18s var(--ease);
}
.card:hover::after { opacity: .9; }
.card-icon { background: linear-gradient(150deg, var(--teal-300), var(--mint)); }

/* ----- CTA: sơn mài + viền vàng + rồng ---------------------------------- */
.cta-banner {
  background: linear-gradient(135deg, var(--lacquer) 0%, var(--teal-900) 70%);
  border: 1px solid var(--gold-line);
}
.cta-banner h2 { color: var(--gold-soft); }
.cta-banner .btn-on-dark { background: var(--gold); color: #2a2008; }
.cta-banner .btn-on-dark:hover { background: var(--gold-soft); color: #2a2008; }
.cta-dragon {
  position: absolute; z-index: 0; pointer-events: none;
  right: -1%; top: 50%; transform: translateY(-50%);
  width: min(40%, 300px); aspect-ratio: 912 / 1121;
  background: url("../assets/motifs/rong-vang.png") no-repeat center / contain;
  opacity: .2;
}
.cta-banner > *:not(.cta-dragon) { position: relative; z-index: 1; }

/* ----- Footer: chỉ vàng mảnh trên cùng ---------------------------------- */
.site-footer { border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, transparent, var(--gold) 30%, var(--gold-soft) 50%, var(--gold) 70%, transparent) 1; }
.footer-brand .brand-name { color: var(--gold-soft) !important; }

/* ----- Eyebrow vàng trên mục sơn mài ------------------------------------ */
.section--dark .eyebrow,
.section--lacquer .eyebrow { color: var(--gold-soft); }
.section--lacquer {
  background: linear-gradient(180deg, var(--lacquer), var(--lacquer-2));
  color: var(--ink-inv);
}
.section--lacquer h2, .section--lacquer h3 { color: var(--gold-soft); }
.section--lacquer p { color: rgba(243,246,244,.82); }

@media (prefers-reduced-motion: reduce) {
  .hero-dragon { animation: none; }
}
@media (max-width: 720px) {
  .hero-dragon { width: 82vw; right: -14%; top: 58%; opacity: .34; }
  .motif-bird { display: none; }
  .divider-nui { height: 80px; }
}