/* ==========================================================================
   Note AI - Genius Note Taker — policy site
   Token màu lấy đúng từ app Flutter (lib/shared/resources/colors/colors.dart)
   để trang chính sách trông cùng một nhà với app.
   ========================================================================== */

:root {
  color-scheme: light dark;

  /* Brand (Figma: Utility/Brand/*) */
  --brand: #0072ff;
  --brand-accent: #1820ff;
  --grad-start: #025ffb;
  --grad-end: #a2c8ff;

  /* Light */
  --bg: #f3f7f9;          /* bg/Base */
  --surface: #ffffff;
  --surface-2: #eef3f7;
  --text: #34404b;        /* content/neutral/strong */
  --text-strong: #101820;
  --text-soft: #5d666f;   /* Gray/800 */
  --border: #dfe6ee;
  --border-strong: #c9d5e2;
  --brand-soft: rgba(0, 114, 255, 0.08);
  --shadow: 0 1px 2px rgba(16, 24, 32, 0.04), 0 8px 24px -12px rgba(16, 24, 32, 0.18);
  --shadow-lg: 0 2px 4px rgba(16, 24, 32, 0.05), 0 24px 48px -24px rgba(16, 24, 32, 0.28);

  --ok: #34c759;
  --warn: #b7791f;
  --warn-bg: rgba(255, 204, 0, 0.12);

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1140px;
  --readw: 46rem;
  --header-h: 64px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

/* Dark: theo hệ thống… */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #151b23;
    --surface-2: #1b222c;
    --text: #d7e0ea;
    --text-strong: #f2f6fa;
    --text-soft: #8f9cab;
    --border: #232c38;
    --border-strong: #33404f;
    --brand: #4d9bff;
    --brand-accent: #7aa7ff;
    --brand-soft: rgba(77, 155, 255, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px -12px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.45), 0 24px 48px -24px rgba(0, 0, 0, 0.75);
    --warn: #ffcc00;
    --warn-bg: rgba(255, 204, 0, 0.1);
  }
}

/* …và ghi đè khi người dùng bấm nút đổi nền. */
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f7f9;
  --surface: #ffffff;
  --surface-2: #eef3f7;
  --text: #34404b;
  --text-strong: #101820;
  --text-soft: #5d666f;
  --border: #dfe6ee;
  --border-strong: #c9d5e2;
  --brand: #0072ff;
  --brand-accent: #1820ff;
  --brand-soft: rgba(0, 114, 255, 0.08);
  --shadow: 0 1px 2px rgba(16, 24, 32, 0.04), 0 8px 24px -12px rgba(16, 24, 32, 0.18);
  --shadow-lg: 0 2px 4px rgba(16, 24, 32, 0.05), 0 24px 48px -24px rgba(16, 24, 32, 0.28);
  --warn: #b7791f;
  --warn-bg: rgba(255, 204, 0, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1117;
  --surface: #151b23;
  --surface-2: #1b222c;
  --text: #d7e0ea;
  --text-strong: #f2f6fa;
  --text-soft: #8f9cab;
  --border: #232c38;
  --border-strong: #33404f;
  --brand: #4d9bff;
  --brand-accent: #7aa7ff;
  --brand-soft: rgba(77, 155, 255, 0.14);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px -12px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.45), 0 24px 48px -24px rgba(0, 0, 0, 0.75);
  --warn: #ffcc00;
  --warn-bg: rgba(255, 204, 0, 0.1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--brand); text-underline-offset: 2px; }
a:hover { color: var(--brand-accent); }

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  color: var(--text-strong);
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
}
.skip:focus { left: 0; }

/* ---------- Header ---------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
}

.site-header .wrap {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  text-decoration: none;
  flex: 0 0 auto;
}
.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 2px 8px -2px rgba(2, 95, 251, 0.6);
  flex: 0 0 auto;
}
.brand__mark svg { width: 17px; height: 17px; display: block; }
.brand__name { font-size: 16px; }
.brand__name span { color: var(--text-soft); font-weight: 500; }

.site-nav {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  padding: 7px 11px;
  border-radius: 999px;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--text-strong); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--brand); background: var(--brand-soft); }

.header-tools { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

.icon-btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  cursor: pointer;
  padding: 0;
}
.icon-btn:hover { color: var(--brand); border-color: var(--border-strong); }
.icon-btn svg { width: 16px; height: 16px; }
/* Nút hiện biểu tượng của chế độ SẼ chuyển sang, không phải chế độ hiện tại:
   đang sáng -> hiện mặt trăng, đang tối -> hiện mặt trời. */
.icon-btn .icon-sun { display: none; }
.icon-btn .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-btn .icon-moon { display: none; }
}
:root[data-theme="dark"] .icon-btn .icon-sun { display: block; }
:root[data-theme="dark"] .icon-btn .icon-moon { display: none; }
:root[data-theme="light"] .icon-btn .icon-sun { display: none; }
:root[data-theme="light"] .icon-btn .icon-moon { display: block; }

.lang {
  display: inline-flex;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  overflow: hidden;
}
.lang a {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 7px 10px;
  color: var(--text-soft);
  text-decoration: none;
  line-height: 1.4;
}
.lang a[aria-current="true"] { background: var(--brand); color: #fff; }
.lang a:not([aria-current="true"]):hover { background: var(--surface-2); color: var(--text-strong); }

/* ---------- Layout ---------------------------------------------------- */

main { display: block; padding-bottom: 72px; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 56px;
  align-items: start;
  padding-top: 44px;
}
@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 28px; }
}

.doc { max-width: var(--readw); }

/* ---------- Doc typography -------------------------------------------- */

.doc-head { margin-bottom: 34px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 13px;
  border-radius: 999px;
}
.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ok);
}

.doc h1 {
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--text-strong);
  margin: 16px 0 10px;
}
.doc .lede { font-size: 19px; color: var(--text-soft); margin: 0; }

.doc h2 {
  font-size: clamp(21px, 3vw, 25px);
  letter-spacing: -0.015em;
  color: var(--text-strong);
  margin: 52px 0 14px;
  padding-top: 4px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.doc h3 {
  font-size: 17.5px;
  color: var(--text-strong);
  margin: 30px 0 8px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.doc h4 { font-size: 16px; color: var(--text-strong); margin: 22px 0 6px; }
.doc p { margin: 0 0 16px; }
.doc ul, .doc ol { padding-inline-start: 22px; margin: 0 0 16px; }
.doc li { margin: 7px 0; }
.doc li > ul, .doc li > ol { margin: 7px 0 0; }
.doc strong { color: var(--text-strong); font-weight: 650; }
.doc hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

.anchor {
  color: var(--border-strong);
  text-decoration: none;
  font-weight: 400;
  opacity: 0;
  padding-inline-start: 4px;
  transition: opacity 0.15s;
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus-visible { opacity: 1; }

.doc code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 6px;
}
.doc pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  overflow-x: auto;
}
.doc pre code { background: none; border: none; padding: 0; font-size: 14px; }

.doc blockquote {
  margin: 20px 0;
  padding: 2px 0 2px 18px;
  border-inline-start: 3px solid var(--border-strong);
  color: var(--text-soft);
}
.doc blockquote p:last-child { margin-bottom: 0; }

.table-scroll {
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; }
.doc th, .doc td { padding: 11px 14px; text-align: start; vertical-align: top; }
.doc thead th {
  background: var(--surface-2);
  color: var(--text-strong);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.doc tbody tr + tr td { border-top: 1px solid var(--border); }

@media (max-width: 640px) {
  .table-scroll { border: none; background: none; }
  .doc table, .doc thead, .doc tbody, .doc tr, .doc td { display: block; width: 100%; }
  .doc thead { display: none; }
  .doc tbody tr {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 4px;
    margin-bottom: 12px;
  }
  .doc tbody tr + tr td { border-top: none; }
  .doc td { padding: 7px 12px; }
  .doc td::before {
    content: attr(data-label);
    display: block;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-soft);
  }
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-inline-start: 3px solid var(--brand);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin: 22px 0;
}
.callout--warn { border-inline-start-color: var(--warn); background: var(--warn-bg); }
.callout--tip { border-inline-start-color: var(--ok); }
.callout__label {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 6px !important;
}
.callout > :last-child { margin-bottom: 0 !important; }

/* ---------- Table of contents ----------------------------------------- */

.toc {
  position: sticky;
  top: calc(var(--header-h) + 28px);
  font-size: 14px;
  border-inline-start: 1px solid var(--border);
  padding-inline-start: 18px;
  max-height: calc(100vh - var(--header-h) - 60px);
  overflow-y: auto;
}
.toc__title {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 10px;
}
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0; }
.toc a {
  display: block;
  padding: 5px 0;
  color: var(--text-soft);
  text-decoration: none;
  line-height: 1.4;
}
.toc a:hover { color: var(--text-strong); }
.toc a.is-active { color: var(--brand); font-weight: 650; }
.toc .lvl-3 a { padding-inline-start: 12px; font-size: 13.5px; }

.toc-mobile { display: none; }
@media (max-width: 960px) {
  .toc { display: none; }
  .toc-mobile {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 16px;
    margin: 0 0 28px;
  }
  .toc-mobile summary {
    cursor: pointer;
    font-weight: 650;
    padding: 13px 0;
    color: var(--text-strong);
    font-size: 15px;
  }
  .toc-mobile ol { list-style: none; margin: 0; padding: 0 0 12px; }
  .toc-mobile a { display: block; padding: 6px 0; color: var(--text-soft); text-decoration: none; }
  .toc-mobile .lvl-3 a { padding-inline-start: 14px; font-size: 14px; }
}

/* ---------- Home ------------------------------------------------------ */

.hero { padding: 64px 0 8px; text-align: center; }
.hero__mark {
  width: 62px;
  height: 62px;
  border-radius: 19px;
  margin: 0 auto 22px;
  background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 10px 28px -12px rgba(2, 95, 251, 0.8);
}
.hero__mark svg { width: 32px; height: 32px; }
.hero h1 {
  font-size: clamp(32px, 6vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-strong);
  margin: 0 0 14px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--grad-start), var(--brand-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  color: var(--text-soft);
  font-size: 18.5px;
  max-width: 34rem;
  margin: 0 auto;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  margin: 44px 0 12px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--brand) 45%, var(--border));
  box-shadow: var(--shadow-lg);
}
.card__icon {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  margin-bottom: 8px;
}
.card__icon svg { width: 18px; height: 18px; }
.card h2 { font-size: 17.5px; margin: 0; color: var(--text-strong); letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--text-soft); font-size: 14.5px; line-height: 1.55; }
.card__more {
  margin-top: auto;
  padding-top: 12px;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--brand);
}

.home-body { max-width: var(--readw); margin: 44px auto 0; }
.home-body h2 { font-size: 22px; color: var(--text-strong); margin: 40px 0 12px; letter-spacing: -0.015em; }
.home-body p { margin: 0 0 16px; }
.home-body ul { padding-inline-start: 22px; }
.home-body li { margin: 7px 0; }

.contact-cta {
  max-width: var(--readw);
  margin: 56px auto 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow);
}
.contact-cta h2 { margin: 0 0 6px; font-size: 20px; color: var(--text-strong); }
.contact-cta p { margin: 0 0 18px; color: var(--text-soft); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--grad-start), var(--brand));
  color: #fff;
  text-decoration: none;
  font-weight: 650;
  font-size: 15px;
  padding: 11px 22px;
  border-radius: 999px;
  box-shadow: 0 8px 20px -10px rgba(2, 95, 251, 0.9);
}
.btn:hover { color: #fff; filter: brightness(1.06); }
.btn svg { width: 16px; height: 16px; }
.btn--ghost {
  background: none;
  color: var(--text-soft);
  border: 1px solid var(--border);
  box-shadow: none;
  font-weight: 600;
}
.btn--ghost:hover { color: var(--brand); border-color: var(--brand); filter: none; }

.doc-foot {
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  color: var(--text-soft);
}
.doc-foot a { color: var(--text-soft); text-decoration: none; font-weight: 600; }
.doc-foot a:hover { color: var(--brand); }

/* ---------- Footer ---------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 34px 0;
  color: var(--text-soft);
  font-size: 14px;
  background: var(--surface);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  align-items: center;
  justify-content: space-between;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.site-footer a { color: var(--text-soft); text-decoration: none; }
.site-footer a:hover { color: var(--brand); }
.site-footer__legal { display: flex; flex-direction: column; gap: 2px; }

/* ---------- 404 ------------------------------------------------------- */

.notfound { text-align: center; padding: 80px 0 20px; }
.notfound__code {
  font-size: 68px;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(100deg, var(--grad-start), var(--brand-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.notfound h1 { font-size: 28px; color: var(--text-strong); margin: 14px 0 8px; }
.notfound p { color: var(--text-soft); margin: 0; }

/* ---------- Print ----------------------------------------------------- */

@media print {
  .site-header, .site-footer, .toc, .toc-mobile, .doc-foot, .contact-cta, .skip { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .layout { display: block; padding-top: 0; }
  .doc { max-width: none; }
  .doc h2 { margin-top: 26px; page-break-after: avoid; }
  .doc a { color: #000; text-decoration: underline; }
  .doc a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
  .callout, .table-scroll { break-inside: avoid; }
}