/* ==========================================================================
   iOS Launcher — Tài liệu nội bộ
   Design tokens + component class. Dùng chung cho mọi page.
   Sửa 1 chỗ ở đây là đổi cả site.
   ========================================================================== */

/* ---------- 1. TOKEN ---------- */

:root {
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* nền + bề mặt */
  --bg: #eef2f9;
  --surface: #ffffff;
  --surface-2: #f5f8fc;
  --surface-3: #e9eff8;
  --line: #dfe6f0;
  --line-2: #cbd6e6;

  /* chữ */
  --ink: #0f172a;
  --ink-2: #414c60;
  --ink-3: #64708a;

  /* loại quảng cáo */
  --full: #2b5bd6;
  --full-s: #e4ebfd;
  --inline: #0d7a55;
  --inline-s: #d9f4e8;
  --reward: #7c3bcc;
  --reward-s: #eee0fd;

  /* ngữ nghĩa */
  --ok: #0d7a55;
  --ok-s: #d9f4e8;
  --warn: #a45a09;
  --warn-s: #fdefdc;
  --stop: #c22a4c;
  --stop-s: #fde3e8;
  --info: #0c6f9c;
  --info-s: #ddf0fa;

  --accent: #2b5bd6;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px -12px rgba(15, 23, 42, 0.14);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.07);
  --radius: 16px;
  --radius-sm: 10px;

  --toc-w: 244px;
  /* Rộng để bảng nhiều cột (bảng sự kiện 5 cột, bảng khoá cấu hình) không bị cắt.
     Đoạn văn vẫn bị giới hạn riêng bằng ch để không dài quá khó đọc. */
  --page-max: 1520px;
  --font-scale: 1;
}

[data-theme="dark"] {
  --bg: #0b1120;
  --surface: #141c2e;
  --surface-2: #1a2438;
  --surface-3: #212d45;
  --line: #2a3854;
  --line-2: #3a4a68;

  --ink: #eef3fb;
  --ink-2: #bcc7db;
  --ink-3: #8e9cb5;

  --full: #8fb0ff;
  --full-s: #1c2a4d;
  --inline: #5fd8aa;
  --inline-s: #12332a;
  --reward: #c79dff;
  --reward-s: #291b40;

  --ok: #5fd8aa;
  --ok-s: #12332a;
  --warn: #f0b45f;
  --warn-s: #33260f;
  --stop: #ff8098;
  --stop-s: #3a1622;
  --info: #6fc7ef;
  --info-s: #102c3a;

  --accent: #8fb0ff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px -14px rgba(0, 0, 0, 0.7);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
}

/* ---------- 2. NỀN TẢNG ---------- */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: calc(16px * var(--font-scale));
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

code, kbd, .mono { font-family: var(--font-mono); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: var(--full-s); color: var(--ink); }

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

/* ---------- 3. HEADER + NAV ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg); /* fallback cho browser không hỗ trợ color-mix */
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-header-in {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand { display: flex; align-items: center; gap: 9px; flex: none; font-weight: 800; letter-spacing: -0.3px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  display: grid; place-items: center; font-size: 16px;
  background: linear-gradient(140deg, var(--full), var(--reward));
  color: #fff;
}
.brand .sub { display: block; font-size: 11.5px; font-weight: 500; color: var(--ink-3); letter-spacing: 0; }

.site-nav { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  flex: none;
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background 0.18s, color 0.18s;
}
.site-nav a:hover { background: var(--surface-2); text-decoration: none; }
.site-nav a[aria-current="page"] { background: var(--full-s); color: var(--full); border-color: color-mix(in srgb, var(--full) 26%, transparent); }

.header-tools { display: flex; align-items: center; gap: 7px; flex: none; }

/* hẹp: brand + nút ở hàng trên, nav xuống hàng dưới cuộn ngang */
@media (max-width: 780px) {
  .site-header-in { flex-wrap: wrap; gap: 10px; padding-bottom: 8px; }
  .site-nav { order: 3; width: 100%; margin-left: 0; padding-bottom: 2px; }
  .header-tools { margin-left: auto; }
  .brand .sub { display: none; }
}

.icon-btn {
  position: relative;
  width: 40px; height: 40px;
  flex: none;
  display: grid; place-items: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.14s, background 0.18s, color 0.18s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }
.icon-btn:active { transform: scale(0.9); }
.icon-btn svg { width: 19px; height: 19px; }
.icon-btn .lbl { font-size: 13px; font-weight: 700; }

/* nút sáng/tối — 2 icon xếp chồng, crossfade + rotate */
.theme-toggle svg {
  position: absolute;
  inset: 0;
  margin: auto;
  transition: opacity 0.26s cubic-bezier(0.4, 0, 0.2, 1), transform 0.34s cubic-bezier(0.34, 1.4, 0.5, 1);
}
.theme-toggle .sun { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-toggle .moon { opacity: 0; transform: rotate(-90deg) scale(0.4); }
[data-theme="dark"] .theme-toggle .sun { opacity: 0; transform: rotate(90deg) scale(0.4); }
[data-theme="dark"] .theme-toggle .moon { opacity: 1; transform: rotate(0deg) scale(1); }

/* ---------- 4. LAYOUT TRANG ---------- */

.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 20px 96px;
  display: grid;
  gap: 32px;
  grid-template-columns: var(--toc-w) minmax(0, 1fr);
  align-items: start;
}
.page.no-toc { grid-template-columns: minmax(0, 1fr); }

@media (max-width: 1023px) {
  .page { grid-template-columns: minmax(0, 1fr); gap: 20px; }
}

.page-hero { max-width: var(--page-max); margin: 0 auto; padding: 30px 20px 18px; }
.page-hero h1 { margin: 0 0 8px; font-size: clamp(26px, 5vw, 38px); font-weight: 800; letter-spacing: -0.8px; line-height: 1.15; }
.page-hero .lead { margin: 0; color: var(--ink-2); font-size: clamp(15px, 2vw, 17px); max-width: 74ch; }
.eyebrow { display: inline-block; margin: 0 0 10px; font-size: 12px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }

/* băng-rôn trạng thái bản khung */
.draft-banner {
  max-width: var(--page-max);
  margin: 0 auto 22px;
  padding: 0 20px;
}
.draft-banner .in {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 12px 15px;
  border-radius: var(--radius-sm);
  background: var(--warn-s);
  border: 1px solid color-mix(in srgb, var(--warn) 32%, transparent);
  color: var(--ink);
  font-size: 14px;
}
.draft-banner b { color: var(--warn); }

/* ---------- 5. MỤC LỤC ---------- */

.toc-wrap { position: sticky; top: 74px; }
.toc-title { font-size: 11.5px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 9px; padding-left: 11px; }
#toc { display: flex; flex-direction: column; gap: 1px; max-height: calc(100vh - 130px); overflow-y: auto; }
#toc a {
  padding: 6px 11px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.4;
  transition: color 0.16s, border-color 0.16s, background 0.16s;
}
#toc a:hover { color: var(--ink); background: var(--surface-2); text-decoration: none; }
#toc a.lv3 { padding-left: 24px; font-size: 12.8px; }
#toc a.active { color: var(--full); border-left-color: var(--full); font-weight: 700; background: var(--full-s); }

/* mobile: gói vào details */
.toc-mobile { display: none; }
@media (max-width: 1023px) {
  .toc-wrap { display: none; }
  .toc-mobile {
    display: block;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
  }
  .toc-mobile > summary { padding: 12px 15px; font-weight: 700; cursor: pointer; font-size: 14.5px; list-style: none; display: flex; align-items: center; gap: 8px; }
  .toc-mobile > summary::-webkit-details-marker { display: none; }
  .toc-mobile > summary::after { content: "▾"; margin-left: auto; color: var(--ink-3); }
  .toc-mobile[open] > summary::after { content: "▴"; }
  .toc-mobile .inner { padding: 0 12px 12px; }
}

/* ---------- 6. SECTION + ANCHOR ---------- */

main > section { margin: 0 0 40px; scroll-margin-top: 84px; }

main h2 {
  margin: 0 0 6px;
  font-size: clamp(20px, 3vw, 25px);
  font-weight: 800;
  letter-spacing: -0.4px;
  display: flex;
  align-items: center;
  gap: 9px;
}
main h2 .num {
  width: 30px; height: 30px; flex: none;
  border-radius: 9px;
  background: var(--surface-3);
  border: 1px solid var(--line);
  color: var(--ink-3);
  display: grid; place-items: center;
  font-size: 14px; font-weight: 700;
}
main h3 { margin: 22px 0 6px; font-size: clamp(16px, 2vw, 18px); font-weight: 700; letter-spacing: -0.2px; scroll-margin-top: 84px; }
main h4 { margin: 16px 0 4px; font-size: 15px; font-weight: 700; }
main p { margin: 6px 0 12px; color: var(--ink-2); }
.hint { color: var(--ink-3); font-size: 14.5px; margin: 0 0 14px; max-width: 82ch; }

.anchor {
  opacity: 0;
  margin-left: 4px;
  font-size: 0.72em;
  font-weight: 700;
  color: var(--ink-3);
  cursor: pointer;
  background: none;
  border: 0;
  padding: 2px 5px;
  border-radius: 6px;
  font-family: var(--font-mono);
  transition: opacity 0.16s, background 0.16s;
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus-visible { opacity: 1; }
.anchor:hover { background: var(--surface-3); color: var(--accent); }
@media (hover: none) { .anchor { opacity: 0.5; } }

/* ---------- 7. CARD ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 17px 19px;
  box-shadow: var(--shadow-sm);
}
.card > :first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }
.card h3 { margin: 0 0 3px; font-size: 17px; }
.card .meta { color: var(--ink-3); font-size: 13.5px; margin: 0 0 9px; }

.card-grid { display: grid; gap: 14px; margin: 14px 0; }
.card-grid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card-grid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) { .card-grid.c3, .card-grid.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .card-grid.c2, .card-grid.c3, .card-grid.c4 { grid-template-columns: minmax(0, 1fr); } }

/* card dẫn sang page khác (dùng ở index) */
a.nav-card {
  display: block;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 19px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
a.nav-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--line-2); text-decoration: none; }
a.nav-card .ic { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; font-size: 21px; margin-bottom: 11px; }
a.nav-card h3 { margin: 0 0 4px; font-size: 18px; }
a.nav-card p { margin: 0 0 10px; font-size: 14px; color: var(--ink-2); }
a.nav-card .go { font-size: 13px; font-weight: 700; color: var(--accent); }

/* ---------- 8. CHIP + BADGE ---------- */

.chip {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  white-space: nowrap;
}
.chip-full { background: var(--full-s); color: var(--full); }
.chip-inline { background: var(--inline-s); color: var(--inline); }
.chip-reward { background: var(--reward-s); color: var(--reward); }
.chip-neutral { background: var(--surface-3); color: var(--ink-3); }

.badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 7px;
  background: var(--surface-3);
  border: 1px solid var(--line);
  color: var(--ink-3);
}

code {
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 0.86em;
  color: var(--ink);
  /* anywhere: chỉ cắt khi thật sự không còn chỗ (khác break-word — nó cắt cả tên ngắn
     giữa chữ, làm `screen_view` thành `screen_vi` + `ew`) */
  word-break: normal;
  overflow-wrap: anywhere;
}

/* ---------- 9. FLOW (kịch bản từng step) ---------- */

.flow {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 14px 0;
  box-shadow: var(--shadow-sm);
}
.flow > .head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 17px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--line);
}
.flow > .head .ic { width: 38px; height: 38px; flex: none; border-radius: 11px; display: grid; place-items: center; font-size: 19px; }
.flow > .head .t { font-weight: 700; font-size: 16.5px; }
.flow > .head .s { color: var(--ink-3); font-size: 13px; }
.flow-step { display: flex; gap: 14px; padding: 12px 17px; align-items: flex-start; }
.flow-step + .flow-step { border-top: 1px solid var(--line); }
.flow-step .lab {
  flex: none; width: 118px;
  font-size: 11.5px; font-weight: 800; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 3px;
}
.flow-step .val { flex: 1; min-width: 0; font-size: 14.8px; color: var(--ink-2); }
.flow-step .val b { color: var(--ink); }
@media (max-width: 620px) {
  .flow-step { flex-direction: column; gap: 3px; }
  .flow-step .lab { width: auto; }
}
.arrow { color: var(--ink-3); margin: 0 3px; }

/* ---------- 10. BẢNG ---------- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  margin: 10px 0 14px;
  -webkit-overflow-scrolling: touch;
}
table { width: 100%; border-collapse: collapse; font-size: 14.2px; }
/* min-width để cột không bị bóp quá hẹp trên màn nhỏ — hẹp hơn mức này thì .table-wrap cuộn ngang */
.table-wrap > table { min-width: 680px; }
th, td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  /* chuỗi dài (danh sách giá trị, tên khoá) xuống dòng thay vì tràn khỏi khung */
  overflow-wrap: anywhere;
}
/* cột đầu là tên khoá / tên sự kiện — giữ nguyên một dòng, đừng cắt giữa tên */
td:first-child > code:only-child,
td.key > code:only-child { white-space: nowrap; }
th {
  background: var(--surface-2);
  color: var(--ink-3);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  z-index: 1;
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--surface-2); }
td.key { white-space: nowrap; }
.t-yes { color: var(--ok); font-weight: 700; }
.t-no { color: var(--ink-3); }
.t-rew { color: var(--reward); font-weight: 700; }
.t-stop { color: var(--stop); font-weight: 700; }

/* description trong bảng — gạch đầu dòng ngắn, không tràn lan */
ul.desc-list { margin: 0; padding-left: 17px; max-width: 58ch; }
ul.desc-list li { margin: 2px 0; font-size: 13.8px; line-height: 1.5; }
ul.desc-list li::marker { color: var(--ink-3); }

/* ô tìm trong bảng */
.filter-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 12px 0 0; }
.filter-input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 9px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}
.filter-input::placeholder { color: var(--ink-3); }
.filter-input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 1px; border-color: var(--accent); }
.filter-count { font-size: 13px; color: var(--ink-3); flex: none; }

/* chip lọc theo tính năng — bấm 1 chip là lọc bảng theo cột "Tính năng" */
.filter-chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 0; }
.filter-chips button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-2);
  font-family: var(--font-sans);
  font-size: 13.2px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.14s, border-color 0.14s, color 0.14s;
}
.filter-chips button:hover { background: var(--surface-2); border-color: var(--line-2); }
.filter-chips button .n {
  font-size: 11.5px;
  font-weight: 700;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--surface-3);
  color: var(--ink-3);
}
.filter-chips button.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.filter-chips button.on .n { background: rgba(255, 255, 255, 0.22); color: #fff; }
.filter-chips button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* một tính năng = tiêu đề + mô tả + bảng riêng; lọc không còn dòng thì ẩn cả khối */
.ev-group { margin: 26px 0 0; }
.ev-group > h3 { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; margin: 0 0 4px; }
.ev-group > .hint { margin-bottom: 8px; }
.ev-group[hidden] { display: none; }

/* ---------- 11. CALLOUT ---------- */

.callout {
  border-radius: 14px;
  padding: 13px 16px;
  margin: 12px 0;
  font-size: 14.6px;
  border: 1px solid;
}
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }
.callout .h { font-weight: 800; margin: 0 0 5px; display: flex; align-items: center; gap: 7px; }
.callout-note { background: var(--info-s); border-color: color-mix(in srgb, var(--info) 30%, transparent); }
.callout-note .h { color: var(--info); }
.callout-warn { background: var(--warn-s); border-color: color-mix(in srgb, var(--warn) 32%, transparent); }
.callout-warn .h { color: var(--warn); }
.callout-stop { background: var(--stop-s); border-color: color-mix(in srgb, var(--stop) 32%, transparent); }
.callout-stop .h { color: var(--stop); }
.callout-ok { background: var(--ok-s); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.callout-ok .h { color: var(--ok); }

ul.plain { margin: 8px 0; padding-left: 20px; }
ul.plain li { margin: 5px 0; }

/* ---------- 12. CHECKLIST QA ---------- */

ul.check-list { list-style: none; padding: 0; margin: 12px 0; }
ul.check-list li {
  position: relative;
  padding: 11px 15px 11px 43px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 11px;
  margin-bottom: 8px;
  font-size: 14.6px;
  color: var(--ink-2);
}
ul.check-list li::before {
  content: "";
  position: absolute; left: 14px; top: 13px;
  width: 17px; height: 17px;
  border: 2px solid var(--line-2);
  border-radius: 5px;
}
ul.check-list li b { color: var(--ink); }

/* ---------- 13. TODO — placeholder chờ map từ code ---------- */

.todo {
  position: relative;
  border-radius: 14px;
  padding: 15px 17px 15px 17px;
  margin: 12px 0;
  border: 1px dashed var(--line-2);
  color: var(--ink-3);
  font-size: 14.3px;
  background:
    repeating-linear-gradient(135deg, transparent 0 11px, color-mix(in srgb, var(--ink-3) 5%, transparent) 11px 22px),
    var(--surface-2);
}
.todo::before {
  content: "⏳ chờ map từ code";
  display: inline-block;
  margin-bottom: 7px;
  padding: 2px 9px;
  border-radius: 7px;
  background: var(--warn-s);
  color: var(--warn);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.todo > p { margin: 0; color: var(--ink-3); }
.todo ul { margin: 6px 0 0; padding-left: 19px; }
.todo li { margin: 3px 0; font-size: 13.8px; }
.todo .src {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11.8px;
  color: var(--ink-3);
  opacity: 0.85;
}

/* ---------- 14. FOOTER + TOAST ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 20px;
  background: var(--surface);
}
.site-footer .in {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 22px 20px 40px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: space-between;
  font-size: 13.2px;
  color: var(--ink-3);
}
.site-footer a { color: var(--ink-2); }

#toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 20px);
  z-index: 90;
  padding: 9px 17px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  font-size: 13.5px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.24s cubic-bezier(0.34, 1.4, 0.5, 1);
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 15. CỔNG MẬT KHẨU ---------- */

/* Khoá: ẩn hẳn (không phải chỉ mờ) để browser không tải ảnh/nội dung của trang. */
html[data-locked="1"] { overflow: hidden; }
html[data-locked="1"] body > *:not(.gate) { display: none !important; }

.gate {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--bg);
  transition: opacity 0.2s;
}
.gate.gate-out { opacity: 0; pointer-events: none; }

.gate-card {
  width: 100%;
  max-width: 372px;
  padding: 30px 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}
.gate-logo {
  width: 54px;
  height: 54px;
  margin: 0 auto 14px;
  display: grid;
  place-items: center;
  font-size: 25px;
  border-radius: 15px;
  background: var(--full-s);
}
.gate-card h1 {
  margin: 0 0 6px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.gate-sub { margin: 0 0 18px; font-size: 14px; color: var(--ink-3); }

.gate-input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  letter-spacing: 0.02em;
}
.gate-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.gate-btn {
  width: 100%;
  margin-top: 10px;
  padding: 11px 14px;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.15s;
}
.gate-btn:hover { filter: brightness(1.08); }
.gate-btn:disabled { opacity: 0.6; cursor: default; }

.gate-err {
  margin: 12px 0 0;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--stop);
}
.gate-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-3);
}

@keyframes gate-shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60% { transform: translateX(7px); }
}
.gate-card.shake { animation: gate-shake 0.42s cubic-bezier(0.36, 0.07, 0.19, 0.97); }

@media (prefers-reduced-motion: reduce) {
  .gate-card.shake { animation: none; }
  .gate { transition: none; }
}

/* ---------- 16. IN GIẤY ---------- */

@media print {
  * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .site-header, .toc-wrap, .toc-mobile, .header-tools, #toast, .draft-banner { display: none !important; }
  .gate { display: none !important; }
  body { background: #fff; font-size: 12px; }
  .page { display: block; padding: 0; }
  .card, .flow, .table-wrap, .callout, ul.check-list li, .todo { break-inside: avoid; }
  main h2 { break-after: avoid; }
  @page { margin: 12mm; }
}