/* ===========================================================================
   Hệ B — ngôn ngữ thị giác của app học viên (2026-10)
   ===========================================================================
   Nguồn: canvas "Hệ B · toàn app" (Marc duyệt 2026-10-03), bản lưu trong repo ở
   docs/design-b/. Nạp SAU style.css / hub-dash.css / upgrade.css / shell.css
   trên mọi trang học viên — landing (/) KHÔNG nạp file này, đúng quyết định
   "landing giữ nguyên".

   Cách dựng: file này không viết lại style.css (200KB, mọi id/lớp đang được JS
   và test dùng). Nó (1) trỏ token cũ về giá trị hệ B để mọi màn đổi theo một
   lượt, rồi (2) vẽ lại từng thành phần theo canvas, cùng selector hoặc cao hơn
   một bậc. Xoá file này khỏi các trang là về đúng giao diện cũ.

   Ba luật của hệ:
     - Mực #111 + burgundy #7A1E35. KHÔNG màu vàng ở đâu cả (Marc chốt vòng 2).
     - Viền 2px, góc 4px, bóng đổ CỨNG lệch xuống-phải, không blur.
     - Một nút chính mỗi màn. Band luôn 1 chữ số thập phân.
   Màu mang nghĩa (đổi có chủ đích vì hệ bỏ vàng): lỗi logic = burgundy nhạt,
   lỗi ngôn ngữ = xanh dương, thành công = xanh lá #1F6B4A, lỗi hệ thống / nút
   xoá = đỏ #E31837.
   ⛔ Không thêm @media (prefers-reduced-motion) — luật 4 của CLAUDE.md.
   ======================================================================== */

:root {
  /* --- bảng màu hệ B --- */
  --ink: #111111;
  --ink-2: #3F3E39;
  --muted: #57564F;
  --muted-2: #8F8D85;
  --bur: #7A1E35;
  --bur-dark: #5E1628;
  --bur-wash: #F6E9EC;
  --bur-soft: #F3C6D0;
  --bur-mid: #D9A3B0;
  --paper: #FFFFFF;
  --canvas: #F2F1EC;
  --canvas-2: #ECEAE2;
  --line-b: #E4E2DA;
  --line-b2: #D8D6CE;
  --ok: #1F6B4A;
  --ok-wash: #E3F1EA;
  --danger: #E31837;
  --lang: #2F6FEB;
  --lang-wash: #E6EEFD;
  --b-border: 2px solid var(--ink);
  --b-radius: 4px;
  --b-shadow: 4px 4px 0 var(--ink);
  --b-shadow-sm: 3px 3px 0 var(--ink);
  --b-shadow-lg: 6px 6px 0 var(--ink);

  /* --- token cũ trỏ về hệ B --- */
  --accent: var(--bur);
  --crimson: var(--bur);
  --crimson-dark: var(--bur-dark);
  --crimson-wash: var(--bur-wash);
  --navy: var(--ink);
  --navy-dark: var(--ink);
  --line-ink: var(--ink);
  --line-crisp: var(--ink);
  --line: var(--line-b);
  --surface-app: var(--canvas);
  --surface-work: var(--canvas);
  --surface-card: var(--paper);
  --card: var(--paper);
  --radius: 4px;
  --radius-card: 4px;
  --radius-sm: 3px;
  --shadow-card: var(--b-shadow);
  --shadow-lift: var(--b-shadow-lg);
  --slate-800: var(--ink);
  --slate-700: var(--ink-2);
  --slate-600: var(--ink-2);
  --slate-500: var(--muted);
  --slate-400: var(--muted);
  --slate-300: var(--line-b2);
  --slate-200: var(--line-b);
  --slate-100: var(--canvas-2);
  --slate-50: #FAFAF7;
  /* Vàng/hổ phách (nghĩa cũ: lỗi logic) → burgundy nhạt. */
  --amber-100: var(--bur-wash);
  --amber-200: var(--bur-soft);
  --amber-300: var(--bur-mid);
  --amber-700: var(--bur);
  --amber-800: var(--bur-dark);
  --blue-100: var(--lang-wash);
  --blue-200: #C9D8FB;
  --blue-300: #9DB8F6;
  --blue-700: var(--lang);
  --blue-800: #1F4FB3;
  --emerald-50: var(--ok-wash);
  --emerald-100: var(--ok-wash);
  --emerald-600: var(--ok);
  --emerald-700: var(--ok);
  --weight-display: 700;
  --weight-black: 700;
}

/* JetBrains Mono của repo chỉ có một độ đậm thật (600). Khai báo 700 trỏ về
   cùng file để nhãn mono đậm không bị trình duyệt tự "tô đậm giả". */
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal; font-weight: 700; font-display: swap;
  src: url('/static/fonts/jetbrains-mono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
                 U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
                 U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal; font-weight: 700; font-display: swap;
  src: url('/static/fonts/jetbrains-mono-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1,
                 U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323,
                 U+0329, U+1EA0-1EF9, U+20AB;
}

/* ===========================================================================
   1. Nền
   ======================================================================== */
body { background: var(--canvas); color: var(--ink); }
body.has-shell .container { max-width: 1320px; padding-left: 36px; padding-right: 36px; }
a { color: var(--ink); }
:focus-visible { outline: 3px solid var(--bur); outline-offset: 3px; }

h1, h2, h3, .page-title { font-family: var(--font-display); font-weight: 700; color: var(--ink); text-wrap: balance; }

/* Đầu trang: nhãn mono đen + tiêu đề lớn (canvas: 44px). */
.page-head { margin: 0 0 22px; }
.page-eyebrow {
  display: inline-block; margin: 0 0 10px;
  padding: 4px 10px; border-radius: 4px;
  background: var(--ink); color: #fff;
  font-family: var(--font-mono); font-weight: 700;
  font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
}
.page-title { font-size: clamp(30px, 3.2vw, 44px); line-height: 1.12; }
.page-meta { color: var(--ink-2); font-size: 15px; }
.app-page { padding-top: 32px; padding-bottom: 64px; }

/* ===========================================================================
   2. Nút
   ======================================================================== */
.b-press, .btn.btn-primary, .btn-secondary, .btn-go {
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn.btn-primary,
.btn-submit,
.hub-action,
.login-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  width: auto; min-height: 48px; padding: 0 22px;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--bur); color: #fff;
  box-shadow: var(--b-shadow);
  font-family: var(--font-body); font-weight: 700;
  font-size: 15.5px; letter-spacing: 0; text-transform: none;
}
.btn-submit, .hub-action, .login-btn { width: 100%; }
@media (hover: hover) {
  .btn.btn-primary:hover:not(:disabled),
  .btn-submit:hover:not(:disabled),
  .hub-action:hover:not(:disabled),
  .login-btn:hover:not(:disabled),
  .btn-secondary:hover:not(:disabled) {
    background: var(--bur); transform: translate(-2px, -2px); box-shadow: var(--b-shadow-lg);
  }
  .btn-secondary:hover:not(:disabled) { background: var(--paper); }
}
.btn.btn-primary:active:not(:disabled),
.btn-submit:active:not(:disabled),
.hub-action:active:not(:disabled),
.login-btn:active:not(:disabled),
.btn-secondary:active:not(:disabled) { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }
.btn.btn-primary:disabled, .btn-submit:disabled, .login-btn:disabled {
  background: var(--canvas-2); color: var(--muted); box-shadow: none; opacity: 1;
}

.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 20px;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  box-shadow: var(--b-shadow);
  font-family: var(--font-body); font-weight: 700;
  font-size: 15px; letter-spacing: 0; text-transform: none;
}

/* Nút chính có dòng phụ mono (canvas: "Viết bài với đề này · CHẤM + SỬA · 10 CREDIT"). */
.btn-go { flex-direction: column; align-items: flex-start; gap: 2px; min-height: 60px; padding: 8px 20px; text-align: left; }
.btn-go-sub {
  font-family: var(--font-mono); font-weight: 700;
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  opacity: 0.85;
}
.btn-go-sub:empty { display: none; }

.btn-ghost {
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  font-weight: 700;
}
.btn-ghost:hover { background: var(--bur-wash); color: var(--ink); }
.btn-tidy {
  border: 0; background: none; padding: 2px 0;
  color: var(--ink); font-weight: 700; font-size: 14px;
  text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px;
}
.btn-tidy:hover { color: var(--bur); border: 0; }
.btn-link {
  border: 0; background: none; padding: 0; cursor: pointer;
  font: inherit; font-weight: 700; color: var(--ink);
  text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px;
}
.btn-link:hover { color: var(--bur); }
.restart-link { color: var(--ink); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.restart-link:hover { color: var(--bur); }
.btn-ghost-danger { border-color: var(--danger); color: var(--danger); }
.btn-ghost-danger:hover { background: var(--danger); color: #fff; }

/* ===========================================================================
   3. Thẻ, ô nhập, chip, tab
   ======================================================================== */
.card {
  background: var(--paper);
  border: 2px solid var(--ink); border-radius: 4px;
  box-shadow: var(--b-shadow);
}
.essay-head { border-bottom: 2px solid var(--ink); }
.essay-eyebrow {
  display: inline-block; padding: 3px 9px; border-radius: 4px;
  background: var(--ink); color: #fff;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em;
}
.essay-meta { color: var(--ink-2); }

input[type="text"], input[type="email"], input[type="password"], input[type="search"],
input:not([type]), textarea, select {
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
}
input[type="text"]:focus, input[type="email"]:focus, input[type="password"]:focus,
input[type="search"]:focus, input:not([type]):focus, textarea:focus, select:focus {
  outline: 3px solid var(--bur); outline-offset: 1px; border-color: var(--ink); box-shadow: none;
}
.input-label { color: var(--ink); font-weight: 700; }
.required-star { color: var(--bur); }

.chip-tag {
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  font-family: var(--font-mono); font-weight: 700;
  font-size: 11px; letter-spacing: 0.02em;
  padding: 2px 7px;
}
.chip-tag.is-soft, .chip-row .chip-tag + .chip-tag {
  border-color: transparent; background: var(--canvas-2);
  font-family: var(--font-body); font-size: 12.5px; letter-spacing: 0;
}

.tabs {
  display: inline-flex; gap: 0; flex-wrap: wrap;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); margin: 0 0 18px;
  overflow: hidden;
}
.tab {
  height: 52px; padding: 0 22px; margin: 0;
  border: 0; border-right: 2px solid var(--ink); border-radius: 0;
  background: var(--paper); color: var(--ink);
  font-weight: 700; font-size: 15px;
}
.tab:last-child { border-right: 0; }
.tab:hover { background: var(--bur-wash); color: var(--ink); }
.tab.is-active { background: var(--ink); color: #fff; border-bottom-color: var(--ink); }
.tab-count {
  border-radius: 0; background: none; padding: 0;
  font-family: var(--font-mono); font-size: 11px; color: inherit; opacity: 0.85;
}

.filter-pill {
  height: 36px; padding: 0 12px;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  font-weight: 600; font-size: 14px;
}
.filter-pill:hover { background: var(--bur-wash); border-color: var(--ink); color: var(--ink); }
.filter-pill.is-active { background: var(--ink); border-color: var(--ink); color: #fff; font-weight: 700; }

.empty-state { border: 2px dashed var(--ink); border-radius: 4px; color: var(--ink-2); background: var(--paper); }
.low-credit-note {
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--bur-wash); color: var(--ink);
  box-shadow: var(--b-shadow-sm);
}
.field-error { color: var(--danger); font-weight: 600; }

/* Chip trạng thái dùng chung (mono, viền). */
.b-chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 24px; padding: 0 8px;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em;
  text-transform: uppercase; white-space: nowrap;
}
.b-chip.is-ink { background: var(--ink); color: #fff; }
.b-chip.is-bur { background: var(--bur); color: #fff; }
.b-chip.is-ok { border-color: var(--ok); color: var(--ok); }

/* Thanh trên: chip credit không in hoa cả cụm (style.css cũ in hoa .site-nav-credits). */
.site-nav-credits { padding: 0; text-transform: none; letter-spacing: 0; color: var(--ink); font-family: var(--font-body); font-size: 14px; }
#auth-name { font-family: var(--font-body); font-weight: 700; letter-spacing: 0; font-size: 14px; }

/* ===========================================================================
   4. Màn chọn đề (B03) — bước ① chọn hoặc dán đề, bước ② chọn cách làm
   ======================================================================== */
.picker-head { margin: 0 0 22px; }
.picker-head .page-head { margin-bottom: 18px; }
.picker-head-side { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.picker-head-side .restart-link { margin: 0; font-size: 14px; }

.seg {
  display: inline-flex; overflow: hidden;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); box-shadow: var(--b-shadow);
}
.seg-btn {
  height: 48px; padding: 0 18px;
  border: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font-body); font-weight: 700; font-size: 15.5px;
  cursor: pointer;
}
.seg-btn + .seg-btn { border-left: 2px solid var(--ink); }
.seg-btn:hover:not(:disabled):not(.is-on) { background: var(--bur-wash); }
.seg-btn.is-on { background: var(--ink); color: #fff; }
.seg-btn:disabled:not(.is-on) { color: var(--muted-2); cursor: not-allowed; }

.picker-steps {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); box-shadow: var(--b-shadow);
  overflow: hidden;
}
.picker-step { display: flex; align-items: center; gap: 14px; min-width: 0; padding: 14px 18px; }
.picker-step + .picker-step-arrow + .picker-step { border-left: 2px solid var(--ink); }
.picker-step-arrow { display: grid; place-items: center; padding: 0 8px; font-size: 22px; font-weight: 700; }
.picker-step-num {
  flex: none; width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  border: 2px solid var(--ink); background: var(--paper); color: var(--ink);
  font-family: var(--font-display); font-weight: 700; font-size: 16px;
}
.picker-step.is-on .picker-step-num { background: var(--ink); color: #fff; }
.picker-step.is-done .picker-step-num { background: var(--ink); color: #fff; font-size: 0; }
.picker-step.is-done .picker-step-num::before { content: "✓"; font-size: 16px; }
#pickerStep2.is-on { background: var(--bur-wash); }
#pickerStep2.is-on .picker-step-num { background: var(--bur); }
.picker-step-copy { display: flex; flex-direction: column; min-width: 0; line-height: 1.35; }
.picker-step-copy strong { font-size: 15.5px; }
.picker-step-copy span { font-size: 13.5px; color: var(--ink-2); }

/* Thẻ lớn của màn chọn đề: lúc đang chọn thì tab là dải trên cùng, không đầu thẻ. */
#essay-input-section { margin-bottom: 40px; }
#essay-input-section.is-picking .essay-head { display: none; }
#essay-input-section.is-picking .intake-body { padding: 0; }
#essay-input-section.is-picking #submitGrid,
#essay-input-section.is-picking #bankPanel,
#essay-input-section.is-picking .low-credit-note,
#essay-input-section.is-picking #essay-error { margin: 20px 22px; }
#essay-input-section.is-picking #submitGrid { margin-top: 22px; margin-bottom: 22px; }
#topicSource.tabs {
  display: flex; width: 100%; margin: 0;
  border: 0; border-bottom: 2px solid var(--ink); border-radius: 0;
}
#topicSource .tab { height: 54px; }
#topicSource .tab:last-child { border-right: 2px solid var(--ink); }

.bank-panel { margin: 0; }
.bank-toolbar { border: 0; padding: 0; margin: 0 0 22px; background: none; }
.bank-toolbar-row { gap: 12px; }
.bank-search, .bank-select {
  height: 46px; padding: 0 14px;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
  font-size: 15px;
}
.bank-search:focus { outline: 3px solid var(--bur); outline-offset: 1px; border-color: var(--ink); }
.bank-count { font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink); }
.bank-pills { border-top: 0; padding-top: 0; margin-top: 16px; gap: 8px; }
.bank-pills-label { font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.12em; color: var(--muted); margin-right: 14px; }

.bank-grid { grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr)); gap: 22px; padding-bottom: 6px; }
.bank-card {
  position: relative; gap: 12px; padding: 16px;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); box-shadow: var(--b-shadow);
  transition: transform .12s ease, box-shadow .12s ease;
}
@media (hover: hover) {
  .bank-card:hover { border-color: var(--ink); transform: translate(-2px, -2px); box-shadow: var(--b-shadow-lg); }
}
.bank-card.is-chosen { border: 3px solid var(--bur); box-shadow: 6px 6px 0 var(--bur); padding: 15px; }
.bank-card.is-chosen::after {
  content: "✓ ĐÃ CHỌN"; position: absolute; top: -12px; right: 14px;
  padding: 3px 8px; border-radius: 4px;
  background: var(--bur); color: #fff; border: 2px solid var(--ink);
  font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.08em;
}
html[lang="en"] .bank-card.is-chosen::after { content: "✓ CHOSEN"; }
.bank-thumb {
  height: auto; aspect-ratio: 16 / 9;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
}
.bank-thumb.bank-art { object-fit: cover; }
.bank-card-prompt { font-size: 15px; line-height: 1.5; -webkit-line-clamp: 3; }
.bank-card:not(:has(.bank-thumb)) .bank-card-prompt { -webkit-line-clamp: 6; }

/* --- thanh "Chọn cách làm" (dock) --- */
.mode-dock.action-dock {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  align-items: stretch; gap: 14px;
  margin: 22px 0 0; padding: 0 18px 18px;
  background: var(--paper);
  border: 2px solid var(--ink); border-radius: 4px;
  box-shadow: var(--b-shadow-lg);
}
#essay-input-section.is-picking .mode-dock.action-dock { margin: 22px 0 0; border-width: 2px 0 0; border-radius: 0; box-shadow: 0 -4px 0 rgba(17,17,17,.06); }
.mode-dock-pick {
  grid-column: 1 / -1; margin: 0 -18px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 12px 18px; background: var(--ink); color: #fff;
}
.mode-dock-pick .action-dock-label {
  flex: none; color: var(--bur-soft);
  font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em;
}
.mode-dock-pick .action-dock-text {
  flex: 1 1 320px; min-width: 0; margin: 0;
  font-size: 15px; font-weight: 600; -webkit-line-clamp: 1; color: #fff;
}
.mode-dock-links { display: flex; gap: 16px; margin-left: auto; }
.mode-dock-links .btn-tidy { color: #fff; }
.mode-dock-links .btn-tidy:hover { color: var(--bur-soft); }

.mode-tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.mode-tile {
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  padding: 12px 14px; min-width: 0;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink);
  font: inherit; text-align: left; cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
}
@media (hover: hover) { .mode-tile:hover:not(.is-on) { background: var(--bur-wash); } }
.mode-tile.is-on { border: 3px solid var(--bur); padding: 11px 13px; background: var(--bur-wash); box-shadow: 4px 4px 0 var(--bur); }
.mode-tile-head { display: flex; align-items: center; gap: 10px; width: 100%; }
.mode-tile-icon {
  flex: none; width: 30px; height: 30px; padding: 5px;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
  fill: none; stroke: var(--ink); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round;
}
.mode-tile.is-on .mode-tile-icon { background: var(--bur); stroke: #fff; }
.mode-tile-name { font-family: var(--font-display); font-weight: 700; font-size: 17px; flex: 1 1 auto; }
.mode-tile-dot {
  flex: none; width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--ink); background: var(--paper);
}
.mode-tile.is-on .mode-tile-dot { background: var(--paper); box-shadow: inset 0 0 0 3px var(--paper), inset 0 0 0 9px var(--bur); }
.mode-tile-desc { font-size: 13.5px; line-height: 1.45; color: var(--ink-2); }
.mode-tile-price {
  margin-top: auto; padding: 2px 7px;
  border: 2px solid var(--ink); border-radius: 4px;
  font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em;
}
.mode-tile-price.is-free { border-color: var(--ok); color: var(--ok); }

.mode-dock-go { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.mode-dock-go .btn-go { width: 100%; min-height: 74px; justify-content: center; }
.mode-dock-note { margin: 0; font-size: 12.5px; line-height: 1.45; color: var(--muted); }

@media (max-width: 1100px) {
  .mode-dock.action-dock { grid-template-columns: minmax(0, 1fr); }
  .mode-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .picker-steps { grid-template-columns: minmax(0, 1fr); }
  .picker-step-arrow { display: none; }
  .picker-step + .picker-step-arrow + .picker-step { border-left: 0; border-top: 2px solid var(--ink); }
  .picker-head-side { align-items: flex-start; }
  .mode-tile-desc { display: none; }
  .mode-dock-pick .action-dock-text { -webkit-line-clamp: 2; }
  #essay-input-section.is-picking #submitGrid,
  #essay-input-section.is-picking #bankPanel { margin: 16px; }
}

/* ===========================================================================
   5. Thanh buổi học (B04–B08, B10): đang viết / chấm / sửa / Học / thi thì
      sidebar nhường chỗ (body.in-session, do syncSessionChrome() bật)
   ======================================================================== */
body.has-shell.writing-page:not(.in-session):not(.shell-anon) header.top { display: none; }
body.in-session.has-shell { padding-left: 0; padding-bottom: 0; }
body.in-session .shell-nav,
body.in-session .shell-top,
body.in-session .shell-tabbar,
body.in-session .shell-overlay { display: none !important; }

/* Selector thứ hai cần đủ nặng để thắng shell.css
   `body.has-shell.writing-page:not(.shell-anon) header.top { background: none }`
   — thiếu nó thì thanh dính này trong suốt và chữ bài trôi xuyên qua khi cuộn. */
body.in-session.writing-page header.top,
body.has-shell.in-session.writing-page:not(.shell-anon) header.top {
  display: block; position: sticky; top: 0; z-index: 50;
  background: var(--paper); border: 0; border-bottom: 2px solid var(--ink);
}
body.in-session.writing-page header.top .header-inner {
  max-width: none; min-height: 74px; margin: 0;
  display: flex; align-items: center; justify-content: flex-start; gap: 24px;
  padding: 0 28px;
}
/* Co được (tên buổi cắt "…"), để thanh đầu không bao giờ tràn ngang. */
body.in-session.has-shell .logo-row { display: flex; align-items: center; gap: 12px; min-width: 0; flex: 0 1 auto; }
body.in-session .logo-row .brand-mark { flex: none; }
body.in-session .logo-row .logo-text { gap: 0; }
body.in-session .logo-row .logo-copy { display: none; }
body.in-session .logo-row .brand-mark { width: 38px; height: 38px; }
.session-id { display: none; }
body.in-session .session-id { display: block; min-width: 0; max-width: 300px; }
.session-title {
  margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 18px; line-height: 1.2;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.session-sub {
  margin: 2px 0 0; font-family: var(--font-mono); font-weight: 700;
  font-size: 10.5px; letter-spacing: 0.08em; color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* Năm bước, mỗi bước một ô (canvas B05/B07). */
header.top .stepper { margin: 0 auto; display: flex; align-items: center; gap: 8px; flex-wrap: nowrap; font-size: 14.5px; }
header.top .stepper.hidden { display: none; }
header.top .step {
  display: inline-flex; align-items: center; gap: 6px;
  height: 40px; padding: 0 12px;
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink); white-space: nowrap;
}
header.top .step-dot { width: auto; height: auto; border-radius: 0; background: none; color: inherit; font-family: var(--font-body); font-size: 14.5px; font-weight: 700; }
header.top .step-label { color: inherit; font-family: var(--font-body); font-weight: 700; }
header.top .step-label.on, header.top .step-label.done { font-family: var(--font-body); color: inherit; font-weight: 700; }
header.top .step:has(.step-dot.on) { background: var(--bur); color: #fff; box-shadow: 3px 3px 0 var(--ink); }
header.top .step:has(.step-dot.done) { background: var(--ink); color: #fff; }
header.top .step-dot.done { font-size: 0; }
header.top .step-dot.done::before { content: "✓"; font-size: 14.5px; }
header.top .step-rule { width: 14px; height: 2px; background: var(--ink); border: 0; flex: none; }

.session-right { display: none; }
body.in-session .session-right { display: flex; align-items: center; gap: 14px; margin-left: auto; flex: none; }
body.in-session .stepper:not(.hidden) ~ .session-right { margin-left: 0; }
.session-save { font-size: 14px; font-weight: 600; color: var(--ok); white-space: nowrap; }
.session-save:empty { display: none; }
.session-save.is-error { color: var(--danger); }
.session-save.is-offline { color: var(--muted); }
.btn-secondary.btn-sm, .btn-sm { min-height: 40px; padding: 0 14px; font-size: 14.5px; box-shadow: var(--b-shadow-sm); }
.session-right .restart-link { font-size: 13.5px; padding: 0; margin: 0; }

/* Band ước tính, gọn (canvas B07): nhãn mono bên trái, số lớn bên phải. */
header.top .summary-card,
body.has-shell.writing-page:not(.shell-anon) header.top .summary-card {
  flex: none; width: auto; min-width: 0; border-radius: 4px;
  display: flex; align-items: center; gap: 0; margin: 0;
  padding: 6px 12px; min-height: 52px;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
  box-shadow: none;
}
header.top .summary-card.hidden { display: none; }
header.top .summary-card > div:first-child { display: grid; grid-template-columns: auto auto; align-items: center; column-gap: 14px; }
header.top .summary-card .band-eyebrow,
header.top .summary-card .band-eyebrow-vn,
header.top .summary-card .band-max,
header.top .summary-card .divider-v,
header.top .summary-card > div:last-child { display: none; }
header.top .summary-card .band-state {
  grid-column: 1; grid-row: 1; padding: 0; background: none; border: 0;
  font-family: var(--font-mono); font-weight: 700; font-size: 10px; letter-spacing: 0.06em;
  color: var(--ink-2); max-width: 120px; line-height: 1.35; white-space: normal;
}
header.top .summary-card .band-number-row { grid-column: 2; grid-row: 1; }
header.top .summary-card .band-number { font-size: 30px; letter-spacing: 0; }

/* 1480, không phải 1200: nhãn Task 1 "Sửa Nội dung & Số liệu" làm thanh đầu cần
   ~1425px (+ dư cho tên buổi). Ở 1201–1440 nó từng tràn ngang — ô band ước tính bị đẩy ra ngoài màn
   hình và cả trang cuộn ngang (đo ở 1280: cần 1425). */
@media (max-width: 1480px) {
  header.top .step-label { display: none; }
  header.top .step:has(.step-dot.on) .step-label { display: inline; }
}
@media (max-width: 900px) {
  /* Ba hàng: logo + tên buổi · thanh bước · lối ra + band ước tính. */
  body.in-session.writing-page header.top .header-inner { flex-wrap: wrap; gap: 10px 12px; padding: 10px 16px; min-height: 58px; }
  body.in-session .session-id { flex: 1 1 0; max-width: none; }
  body.in-session .logo-row .brand-mark { width: 34px; height: 34px; }
  header.top .stepper { order: 3; width: 100%; margin: 0; gap: 4px; overflow-x: auto; padding: 0 4px 4px 0; }
  header.top .step { height: 36px; padding: 0 10px; }
  header.top .step-rule { width: 8px; }
  body.in-session .session-right { order: 4; width: 100%; gap: 16px; justify-content: flex-start; }
  body.in-session .session-right .summary-card { margin-left: auto; min-height: 44px; padding: 4px 10px; }
  header.top .summary-card .band-number { font-size: 24px; }
  .session-save { display: none; }
}

/* ===========================================================================
   6. Màn viết bài (B05)
   ======================================================================== */
body.in-session-write #essay-input-section,
body.in-session #essay-input-section:not(.is-picking) {
  background: none; border: 0; box-shadow: none; margin-bottom: 40px;
}
body.in-session-write #essay-input-section .essay-head { display: none; }
body.in-session-write #essay-input-section .intake-body { padding: 0; }
@media (min-width: 1024px) {
  body.in-session-write #submitGrid.submit-split.is-task2,
  body.in-session-write #submitGrid.submit-split.is-task1 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 28px; }
}
/* Cột trái: thẻ đề có hình minh hoạ (đề Task 2 thư viện). */
.prompt-card {
  border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); box-shadow: var(--b-shadow);
  padding: 20px;
}
.prompt-card-head { align-items: center; gap: 8px; }
.prompt-card-label {
  font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-2);
}
.prompt-card-art {
  display: block; width: 100%; aspect-ratio: 16 / 7; object-fit: cover;
  margin: 14px 0 0; border: 2px solid var(--ink); border-radius: 4px;
}
.prompt-card-art[hidden] { display: none; }
.prompt-card-text { font-family: var(--font-body); font-weight: 700; font-size: 18px; line-height: 1.5; color: var(--ink); }
.prompt-card-figures img { border: 2px solid var(--ink); border-radius: 4px; }
/* Cột phải: thẻ bài làm. */
body.in-session-write #essay-input-section .submit-col + .submit-col {
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
  box-shadow: var(--b-shadow); padding: 0; overflow: hidden;
}
body.in-session-write #essayLabel {
  display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 0;
  padding: 18px 22px; border-bottom: 2px solid var(--ink);
  font-family: var(--font-display); font-size: 20px;
}
body.in-session-write #essayLabel .required-star { display: none; }
body.in-session-write #essay-input-section textarea#essay-input {
  border: 0; border-radius: 0; min-height: 520px; padding: 22px 24px;
  font-size: 17px; line-height: 1.75; background: var(--paper);
}
body.in-session-write #essay-input-section textarea#essay-input:focus { outline: 0; box-shadow: inset 0 0 0 3px var(--bur-wash); }
body.in-session-write .essay-toolbar {
  margin: 0; padding: 12px 22px; background: var(--canvas); border-top: 2px solid var(--ink);
  flex-wrap: wrap; gap: 10px;
}
body.in-session-write .essay-actions .btn { min-height: 48px; }
body.in-session-write .consent-note { margin: 0; padding: 0 22px 16px; background: var(--canvas); font-size: 12.5px; color: var(--muted); }
body.in-session-write #guideChecklist { margin: 0; border-top: 2px solid var(--ink); }
.essay-progress { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.04em; }
.essay-progress-bar { position: relative; width: 160px; height: 12px; border: 2px solid var(--ink); border-radius: 3px; background: var(--paper); overflow: hidden; }
.essay-progress-bar > span { position: absolute; inset: 0 auto 0 0; background: var(--bur); }
.essay-progress-note { font-family: var(--font-body); font-size: 13.5px; color: var(--bur); letter-spacing: 0; }
.essay-progress-note.is-done { color: var(--ok); }

/* ===========================================================================
   7. Màn sửa lỗi (B07): bài bên trái, thẻ câu hỏi bên phải
   ======================================================================== */
@media (min-width: 1024px) {
  body.in-session .layout { grid-template-columns: minmax(0, 1.18fr) minmax(0, 1fr); gap: 28px; }
}
.layout > .card { box-shadow: var(--b-shadow-lg); }
.topic-banner { background: var(--canvas-2); border-bottom: 2px solid var(--ink); padding: 14px 24px; color: var(--ink); font-size: 14.5px; }
.topic-banner strong { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--ink-2); }
.essay-body { font-size: 17.5px; line-height: 1.85; padding: 26px 26px 18px; }
.essay-legend { border-top: 2px solid var(--ink); background: var(--canvas); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--ink-2); }
.legend-swatch.is-logic { background: var(--bur-wash); border-bottom: 3px solid var(--bur); }
.legend-swatch.is-language { background: var(--lang-wash); border-bottom: 3px solid var(--lang); }

/* Đánh dấu trong bài: nền nhạt + gạch dưới 3px, theo nghĩa (logic = burgundy,
   ngôn ngữ = xanh dương, chính tả = đỏ). */
.highlight-btn.active { text-decoration: none; border-radius: 0; padding: 2px 0; }
.highlight-btn.active.logic { background: var(--bur-wash); box-shadow: inset 0 -3px 0 var(--bur), 0 0 0 2px var(--bur-wash); }
.highlight-btn.active.logic:hover { background: var(--bur-soft); }
.highlight-btn.active.language { background: var(--lang-wash); box-shadow: inset 0 -3px 0 var(--lang), 0 0 0 2px var(--lang-wash); }
.highlight-btn.active.language:hover { background: #C9D8FB; }
.highlight-btn.active.spelling { background: #FCE4E8; box-shadow: inset 0 -3px 0 var(--danger); }
.highlight-btn[role="button"]:focus-visible { outline: 3px solid var(--bur); outline-offset: 2px; }

/* Thẻ câu hỏi. */
.sidebar-card { border: 2px solid var(--ink); box-shadow: 6px 6px 0 var(--bur); }
.sidebar-head { background: var(--ink); border-bottom: 0; padding: 14px 20px; }
#sidebarSubtitle { color: #fff; font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; }
.sidebar-body { padding: 20px; }
.scope-note { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); border: 0; }
.tag { padding: 0; background: none; border-radius: 0; text-transform: none; letter-spacing: 0; font-size: 24px; line-height: 1.25; color: var(--ink); }
.tag.logic, .tag.language { background: none; color: var(--ink); }
.tag.long { font-size: 20px; }
@media (min-width: 1024px) {
  #panelPending .quote-block { display: none; }
}
.quote-block.logic { border-left: 3px solid var(--bur); }
.quote-block.language { border-left: 3px solid var(--lang); }
.question-box {
  display: flex; gap: 14px; align-items: flex-start;
  margin: 16px 0 0; padding: 16px;
  border: 2px solid var(--bur); border-radius: 4px; background: var(--bur-wash);
}
#panelPending:has(.tag.language) .question-box { border-color: var(--lang); background: var(--lang-wash); }
.question-mark {
  flex: none; width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bur); color: #fff;
  font-family: var(--font-display); font-weight: 700; font-size: 20px;
}
#panelPending:has(.tag.language) .question-mark { background: var(--lang); }
.question-box-body { min-width: 0; }
.question-label { margin: 0 0 6px; font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--bur); }
#panelPending:has(.tag.language) .question-label { color: var(--lang); }
.question-box .question-text { margin: 0; font-size: 17px; line-height: 1.55; color: var(--ink); font-weight: 600; }
.edit-hint { font-size: 13.5px; color: var(--ink-2); }
.why-note > summary { font-family: var(--font-body); font-weight: 700; font-size: 14px; color: var(--ink); letter-spacing: 0; text-transform: none; }
textarea.correction-input { border: 2px solid var(--ink); border-radius: 4px; font-size: 16px; line-height: 1.6; padding: 14px; }
textarea.correction-input:focus { outline: 3px solid var(--bur); outline-offset: 1px; box-shadow: none; border-color: var(--ink); }
.fix-toolbar { margin-top: 14px; gap: 10px; }
.fix-toolbar span { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); }
.fix-toolbar .btn-ghost { min-height: 40px; padding: 0 12px; font-size: 14px; }
.fix-toolbar .btn-submit { width: auto; flex: 1 1 100%; min-height: 54px; font-size: 16px; }
.sidebar-exit { border-top: 2px solid var(--ink); background: var(--canvas); padding: 12px 20px; }
.sidebar-exit .restart-link { padding-top: 0; font-size: 14px; }
.incorrect-verdict { border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow-sm); }
.force-terminated-overlay { border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow); }

/* Màn viết bài — trợ thủ cột trái và đầu thẻ bài. */
.prompt-card-note { margin: 12px 0 0; font-size: 13.5px; color: var(--muted); }
.prompt-card-note:empty { display: none; }
.write-coach {
  margin: 22px 0 0; padding: 18px 20px;
  border: 2px solid var(--bur); border-radius: 4px; background: var(--bur-wash);
}
.write-coach-title { display: flex; align-items: center; gap: 10px; margin: 0 0 8px; font-family: var(--font-display); font-weight: 700; font-size: 16px; }
.write-coach-mark { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 3px; background: var(--bur); color: #fff; font-weight: 700; }
.write-coach-text { margin: 0; font-size: 14.5px; line-height: 1.55; color: var(--ink); }
.write-phrases {
  margin: 22px 0 0; padding: 18px 20px 16px;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow);
}
.write-phrases-title { margin: 0 0 6px; font-size: 16px; }
.write-phrases-list { list-style: none; margin: 0 0 12px; padding: 0; }
.write-phrase { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; border-top: 2px solid var(--line-b); }
.write-phrase-copy { display: flex; flex-direction: column; min-width: 0; line-height: 1.35; }
.write-phrase-copy strong { font-size: 14.5px; }
.write-phrase-copy span { font-size: 12.5px; color: var(--muted); }
.btn-secondary.btn-xs, .btn-xs { min-height: 32px; padding: 0 10px; font-size: 13px; box-shadow: none; flex: none; }
.essay-card-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
body.in-session-write .essay-card-head { padding: 18px 22px; border-bottom: 2px solid var(--ink); }
body.in-session-write #essayLabel { padding: 0; border: 0; }

/* Nền giấy kẻ ô của hệ B (canvas: ô 28px, nét #E4E2DA). */
body.has-shell, body.writing-page {
  background-color: var(--canvas);
  background-image: linear-gradient(var(--line-b) 1px, transparent 1px), linear-gradient(90deg, var(--line-b) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* ===========================================================================
   8. Màn chờ chấm (B06): một thẻ trên nền giấy, thanh buổi học vẫn ở trên
   ======================================================================== */
.loading-overlay {
  background-color: var(--canvas);
  background-image: linear-gradient(var(--line-b) 1px, transparent 1px), linear-gradient(90deg, var(--line-b) 1px, transparent 1px);
  background-size: 28px 28px;
  backdrop-filter: none; -webkit-backdrop-filter: none;
}
body.in-session .loading-overlay { top: 76px; z-index: 45; }
.load-card {
  max-width: 760px; border: 2px solid var(--ink); border-radius: 4px;
  box-shadow: 8px 8px 0 var(--ink); display: flex; flex-direction: column;
}
.load-bar-top { order: 0; background: none; border: 0; padding: 30px 34px 0; }
.load-live { background: var(--bur); }
.load-engine { display: none; }
.load-badge {
  margin-left: 0; order: -1; background: var(--bur); color: #fff;
  border-radius: 4px; padding: 5px 10px; font-size: 11.5px; letter-spacing: 0.1em;
}
.load-body { padding: 18px 34px 26px; gap: 22px; }
.load-title { font-size: clamp(28px, 3vw, 40px); line-height: 1.15; }
.load-sub { font-size: 16px; color: var(--ink-2); max-width: 60ch; }
.load-track { height: 22px; padding: 0; background: var(--paper); border: 2px solid var(--ink); border-radius: 3px; }
.load-fill {
  background-color: var(--bur-wash);
  background-image: repeating-linear-gradient(-45deg, var(--bur) 0 10px, var(--bur-wash) 10px 20px);
  background-size: auto; animation: loadStripesB 0.9s linear infinite;
}
@keyframes loadStripesB { to { background-position: 28px 0; } }
.load-steps { border-top: 2px solid var(--line-b); border-bottom: 2px solid var(--line-b); }
.load-step { color: var(--muted); font-size: 12.5px; }
.load-step-mark { border: 2px solid var(--ink); background: var(--paper); color: var(--ink); }
.load-step.is-done { color: var(--ink-2); }
.load-step.is-done .load-step-mark { background: var(--ink); color: #fff; border-color: var(--ink); }
.load-step.is-now { color: var(--ink); }
.load-step.is-now .load-step-mark { background: var(--bur); color: #fff; border-color: var(--ink); }
.load-step.is-now .load-step-note { background: var(--bur-wash); color: var(--bur); border: 2px solid var(--bur); border-radius: 3px; }
.load-recall { border: 2px solid var(--bur); border-radius: 4px; background: var(--bur-wash); color: var(--ink); font-size: 14px; }
.load-recall-head { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--bur); }
.load-bar-bottom { background: var(--canvas); border-top: 2px solid var(--ink); color: var(--ink-2); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }
.load-bar-bottom.is-over #loadingEta { color: var(--bur); }

/* ===========================================================================
   9. Báo cáo cuối buổi (B08)
   ======================================================================== */
body.in-session-report header.top .summary-card { display: none !important; }
#workspace.report-mode .sidebar-card { border: 0; box-shadow: none; background: none; overflow: visible; }
#workspace.report-mode .sidebar-head,
#workspace.report-mode .sidebar-exit { display: none; }
#workspace.report-mode .sidebar-body { padding: 0; min-height: 0; }
#workspace.report-mode .sticky-wrap { position: static; }
#panelReport .report { max-width: none; }
.rp-top { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(280px, 1fr); gap: 26px; align-items: stretch; margin-bottom: 26px; }
.rp-hero {
  margin: 0; padding: 30px 32px;
  background: var(--ink); color: #fff;
  border: 2px solid var(--ink); border-radius: 4px; box-shadow: 8px 8px 0 var(--bur);
}
.rp-hero .report-overall-label { margin: 0; font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.12em; color: #E7E5DE; text-transform: uppercase; }
.rp-hero .report-overall-scores { display: flex; align-items: center; gap: 18px; margin: 10px 0 18px; font-family: var(--font-display); font-weight: 700; flex-wrap: wrap; }
.rp-hero .report-overall-scores .was { font-size: 64px; color: #A3A198; line-height: 1; }
.rp-hero .report-overall-scores .arrow { font-size: 40px; color: #A3A198; }
.rp-hero .report-overall-scores .now { font-size: 104px; line-height: 0.95; color: #fff; }
.rp-hero .report-delta { padding: 6px 10px; border-radius: 3px; background: var(--bur); color: #fff; font-family: var(--font-mono); font-size: 17px; font-weight: 700; }
.rp-ceiling { display: flex; align-items: center; gap: 12px; margin: 0; padding-top: 14px; border-top: 2px solid #3A3936; flex-wrap: wrap; }
.rp-ceiling-chip { padding: 4px 9px; border: 2px solid var(--bur-soft); border-radius: 3px; color: var(--bur-soft); font-family: var(--font-mono); font-weight: 700; font-size: 15px; }
.rp-hero .report-ceiling-reason { margin: 0; color: #fff; font-size: 15.5px; }
.rp-chips { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.rp-chips .b-chip { height: 40px; padding: 0 12px; background: transparent; color: #fff; border-color: #57564F; font-size: 12px; }
.rp-next {
  display: flex; flex-direction: column; gap: 12px; padding: 24px;
  background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg);
}
.rp-next h3 { margin: 0; font-size: 20px; }
.rp-next p { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.5; }
.rp-next-actions { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }
.rp-next-actions .btn, .rp-next-actions .btn-secondary, .rp-next-actions .btn-ghost {
  width: 100%; min-height: 50px; justify-content: center; text-decoration: none; text-align: center; margin: 0;
  display: inline-flex; align-items: center;
}
.rp-next-actions .btn-ghost { border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); font-weight: 700; font-size: 15px; }
.rp-card {
  background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg);
}
.rp-criteria { padding: 22px 26px 8px; margin-bottom: 26px; }
.rp-card-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-bottom: 16px; border-bottom: 2px solid var(--line-b); }
.rp-card-head h3 { margin: 0; font-size: 22px; }
.rp-legend { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--ink-2); flex-wrap: wrap; }
.rp-legend .rp-cell { width: 16px; height: 16px; margin-left: 10px; }
.rp-row { display: grid; grid-template-columns: minmax(200px, 1fr) minmax(0, 2fr) auto; gap: 22px; align-items: center; padding: 18px 0; border-bottom: 2px solid var(--line-b); }
.rp-row:last-child { border-bottom: 0; }
.rp-row .report-crit { font-size: 14.5px; }
.rp-row .report-comment { margin: 2px 0 0; font-size: 13.5px; color: var(--ink-2); line-height: 1.45; }
.rp-bar { display: grid; grid-template-columns: repeat(11, minmax(0, 1fr)); gap: 3px; }
.rp-cell { display: inline-block; height: 22px; border: 2px solid var(--ink); border-radius: 2px; background: var(--paper); }
.rp-cell.is-base { background: var(--ink); }
.rp-cell.is-gain { background: var(--bur); }
.rp-cell.is-room { background: repeating-linear-gradient(-45deg, var(--bur-mid) 0 3px, var(--paper) 3px 7px); border-color: var(--bur-mid); }
.rp-row-scores { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; text-align: right; }
.rp-row-band { font-family: var(--font-display); font-weight: 700; font-size: 22px; white-space: nowrap; }
.rp-row-band .arrow { margin: 0 4px; }
.rp-row-meta { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.04em; color: var(--bur); text-transform: uppercase; white-space: nowrap; }
.rp-blocks { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.rp-blocks .report-block { margin: 0; padding: 20px 22px; }
.report-block-title { font-family: var(--font-mono); font-weight: 700; font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.report-block.focus { background: var(--bur-wash); border-color: var(--bur); box-shadow: 6px 6px 0 var(--bur); }
.report-block.focus .report-block-title { color: var(--bur); }
.report-upgrade { margin-top: 22px; border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow); }
.report-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--muted); text-transform: uppercase; }
@media (max-width: 1100px) {
  .rp-top { grid-template-columns: minmax(0, 1fr); }
  .rp-row { grid-template-columns: minmax(0, 1fr) auto; }
  .rp-bar { grid-column: 1 / -1; grid-row: 2; }
}
@media (max-width: 640px) {
  .rp-hero { padding: 22px 20px; }
  .rp-hero .report-overall-scores .now { font-size: 72px; }
  .rp-hero .report-overall-scores .was { font-size: 44px; }
  .rp-criteria { padding: 18px 16px 4px; }
}
.rp-hero, .rp-hero .report-overall-label { text-align: left; }
.rp-hero .report-overall-scores { justify-content: flex-start; }
.rp-row { grid-template-columns: minmax(200px, 1fr) minmax(0, 2fr) 132px; }
a.btn-secondary, a.btn.btn-primary { text-decoration: none; }
@media (max-width: 1100px) { .rp-row { grid-template-columns: minmax(0, 1fr) 132px; } }

/* ===========================================================================
   10. Chế độ Học (B04): bốn bước trên thanh buổi học, hai cột thẻ
   ======================================================================== */
#guideSteps { display: none; }
body.is-guiding header.top #guideSteps {
  display: inline-flex; margin: 0 auto; flex-wrap: nowrap; gap: 0; padding: 0;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); overflow: hidden;
}
body.is-guiding header.top #guideSteps ~ .session-right { margin-left: 0; }
header.top .guide-step-pill {
  height: 40px; padding: 0 14px; gap: 8px;
  border: 0; border-right: 2px solid var(--ink); border-radius: 0;
  background: var(--paper); color: var(--ink); box-shadow: none;
  font-family: var(--font-body); font-weight: 700; font-size: 15px;
}
header.top .guide-step-pill:last-child { border-right: 0; }
header.top .guide-step-pill:hover { background: var(--bur-wash); }
header.top .guide-step-pill.is-active { background: var(--bur); color: #fff; border-color: var(--ink); box-shadow: none; }
header.top .guide-step-pill.is-done { background: var(--ink); color: #fff; }
header.top .guide-step-num {
  width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  border: 2px solid currentColor; font-size: 12px; font-weight: 700; opacity: 1;
}

body.is-guiding main.container { max-width: 1340px; }
.guide-shell {
  border: 0; border-radius: 0; background: none; overflow: visible;
  gap: 28px; grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.25fr);
  height: clamp(480px, calc(100dvh - 120px), 1000px);
}
.guide-shell.is-task1 { grid-template-columns: minmax(360px, 1.05fr) minmax(380px, 1fr); }
.guide-pane-left { border-right: 0; gap: 20px; overflow: visible; }
.guide-shell.is-task1 .guide-pane-left { overflow: visible; }
.guide-topic-card {
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
  box-shadow: var(--b-shadow); padding: 18px 20px;
}
.guide-topic-label { font-family: var(--font-mono); font-weight: 700; font-size: 11px; color: var(--ink-2); }
.guide-topic-task { border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); color: var(--ink); font-size: 11px; }
.guide-topic-text { font-weight: 700; font-size: 17px; line-height: 1.5; color: var(--ink); max-height: 10em; }
.guide-pane-left .guide-pane-scroll {
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow);
}
.guide-chart:not([hidden]) { border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow); padding: 12px; }
.guide-pane-right {
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper);
  box-shadow: var(--b-shadow-lg); overflow: hidden;
}
.guide-work-head { padding: 22px 24px 18px; border-bottom: 2px solid var(--ink); background: var(--paper); }
.guide-work-title { font-family: var(--font-display); font-weight: 700; font-size: clamp(24px, 2.4vw, 32px); line-height: 1.15; }
.guide-work-sub { color: var(--ink-2); font-size: 15px; }
.btn-lib {
  min-height: 40px; padding: 0 12px;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); color: var(--ink);
  box-shadow: var(--b-shadow-sm); font-weight: 700; font-size: 14px;
}
.guide-work-bar { border-top: 2px solid var(--ink); background: var(--canvas); padding: 14px 22px; }
.guide-review { border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow); }
.guide-crit { border: 2px solid var(--ink); border-radius: 3px; background: var(--paper); color: var(--ink); font-family: var(--font-mono); font-weight: 700; font-size: 11px; padding: 1px 6px; }
@media (max-width: 1023px) {
  .guide-shell { height: auto; grid-template-columns: minmax(0, 1fr); }
  body.is-guiding header.top #guideSteps { order: 3; width: 100%; overflow-x: auto; margin: 0; }
}
.session-feedback {
  display: none; border: 0; background: none; padding: 0; cursor: pointer;
  font: inherit; font-weight: 700; font-size: 13.5px; color: var(--ink);
  text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px;
}
body.in-session .session-feedback { display: inline; }
.session-feedback:hover { color: var(--bur); }
body.in-session .feedback-fab { display: none; }
body.in-session .feedback-widget { left: 16px; bottom: 16px; }
/* Nút góp ý nổi (khách /hoc-thu) theo hệ B. */
.feedback-fab { border: 2px solid var(--ink); border-radius: 4px; background: var(--bur); color: #fff; box-shadow: var(--b-shadow-sm); }
.feedback-panel { border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); }
/* Thẻ con trong cột dẫn dắt của chế độ Học. */
.guide-pane-left .guide-pane-scroll { padding: 18px 20px; }
.guide-box { border: 0; border-bottom: 2px solid var(--line-b); border-radius: 0; background: none; padding: 14px 0; box-shadow: none; }
.guide-box:last-child { border-bottom: 0; }
.guide-trap { border: 2px solid var(--bur); border-left-width: 2px; border-radius: 4px; background: var(--bur-wash); padding: 14px 16px; }
.guide-trap h4 { color: var(--bur); font-family: var(--font-display); }
.guide-trap p { color: var(--ink); }

/* ===========================================================================
   11. Thi thật / Luyện tập · xác nhận (B09)
   ======================================================================== */
.exam-setup { margin: 0 0 40px; }
.exam-setup-head { margin: 0 0 24px; }
.exam-setup-eyebrow {
  display: inline-block; margin: 0 0 10px; padding: 4px 10px; border-radius: 4px;
  background: var(--ink); color: #fff;
  font-family: var(--font-mono); font-weight: 700; font-size: 11.5px; letter-spacing: 0.1em;
}
.exam-setup-head .page-title { margin: 0 0 10px; }
.exam-setup-lead { margin: 0 0 14px; max-width: 72ch; font-size: 16px; line-height: 1.6; color: var(--ink-2); }
.exam-setup-crumbs { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 0; }
.crumb-done, .crumb-mode {
  padding: 3px 8px; border: 2px solid var(--ink); border-radius: 4px;
  font-family: var(--font-mono); font-weight: 700; font-size: 11.5px; letter-spacing: 0.04em;
}
.crumb-done { background: var(--paper); }
.crumb-mode { background: var(--bur); color: #fff; }
.exam-setup-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(280px, 1fr); gap: 26px; align-items: start; }
.exam-setup-card { background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); overflow: hidden; }
.exam-setup-card-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 18px 22px; border-bottom: 2px solid var(--ink); }
.exam-setup-card-head h2 { margin: 0; font-size: 20px; }
.exam-setup-clock { font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.06em; }
.exam-setup-parts { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); }
.exam-setup-parts.is-single { grid-template-columns: minmax(0, 1fr); }
.exam-part { display: flex; flex-direction: column; gap: 14px; padding: 22px; min-width: 0; }
.exam-part + .exam-part { border-left: 2px solid var(--ink); }
.exam-part-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.exam-part-head strong { font-family: var(--font-display); font-size: 24px; }
.exam-part-tag { padding: 2px 7px; border: 2px solid var(--ink); border-radius: 3px; font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.06em; background: var(--paper); }
.exam-part-tag.is-chosen { background: var(--bur); color: #fff; }
.exam-part-body { display: flex; gap: 14px; align-items: flex-start; }
.exam-part-art { flex: none; width: 140px; aspect-ratio: 16 / 10; object-fit: cover; border: 2px solid var(--ink); border-radius: 4px; }
.exam-setup-parts.is-single .exam-part-art { width: 220px; }
.exam-part-prompt { font-weight: 700; font-size: 15px; line-height: 1.5; }
.exam-part-random { display: flex; flex-direction: column; gap: 6px; padding: 14px; border: 2px dashed var(--ink); border-radius: 4px; background: var(--canvas); font-size: 14px; line-height: 1.5; color: var(--ink-2); }
.exam-part-random strong { color: var(--ink); font-size: 15px; }
.exam-part-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; }
.exam-part-meta span { padding: 3px 8px; border: 2px solid var(--ink); border-radius: 3px; font-family: var(--font-mono); font-weight: 700; font-size: 11px; }
.exam-setup-rules { padding: 18px 22px 22px; border-top: 2px solid var(--ink); background: var(--canvas); }
.exam-setup-rules strong { display: block; margin-bottom: 10px; font-size: 15px; }
.exam-setup-rules ol { margin: 0; padding: 0; list-style: none; counter-reset: rule; display: flex; flex-direction: column; gap: 8px; }
.exam-setup-rules li { counter-increment: rule; display: flex; align-items: flex-start; gap: 10px; font-size: 14.5px; }
.exam-setup-rules li::before {
  content: counter(rule); flex: none; width: 20px; height: 20px; display: grid; place-items: center;
  border-radius: 3px; background: var(--ink); color: #fff; font-family: var(--font-mono); font-weight: 700; font-size: 11px;
}
.exam-setup-side { display: flex; flex-direction: column; gap: 12px; padding: 22px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: 6px 6px 0 var(--bur); }
.exam-setup-side-label { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; color: var(--ink-2); }
.exam-setup-price { display: flex; align-items: baseline; gap: 10px; margin: 0; }
.exam-setup-price strong { font-family: var(--font-display); font-size: 34px; }
.exam-setup-price-was { font-family: var(--font-mono); font-weight: 700; font-size: 12px; text-decoration: line-through; color: var(--muted); }
.exam-setup-price-was:empty { display: none; }
.exam-setup-note { margin: 0; font-size: 14px; line-height: 1.55; color: var(--ink-2); }
.exam-setup-side .btn-go { width: 100%; min-height: 58px; justify-content: center; align-items: center; font-size: 17px; }
.exam-setup-ctanote { margin: 0; font-size: 12.5px; color: var(--muted); }
@media (max-width: 1100px) {
  .exam-setup-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  .exam-setup-parts { grid-template-columns: minmax(0, 1fr); }
  .exam-part + .exam-part { border-left: 0; border-top: 2px solid var(--ink); }
  .exam-part-body { flex-direction: column; }
  .exam-part-art { width: 100%; }
}

/* ===========================================================================
   12. Phòng thi — giao diện thi máy của British Council (2026-10-15)
   Đối chiếu ảnh chụp màn thi thật: thanh trên trắng (mã thí sinh bên trái,
   công cụ bên phải); DẢI XÁM "Part N + hướng dẫn" chạy suốt hai khung; khung
   trái (đề, hình) | thanh chia xám có tay nắm ↔ | khung phải (ô viết, "Words:
   N" dưới ô); mũi tên to ở góc phải dưới; thanh dưới chỉ có chữ Part và nút
   tick. Nền trắng, Arial, góc vuông. Phòng thi cố ý KHÔNG dùng ngôn ngữ hệ B.
   ======================================================================== */
:root { --exam-bar-h: 56px; --exam-foot-h: 56px; --exam-timebar-h: 4px; }
body.exam-running header.top { display: none !important; }
body.exam-running main.container { padding: 0 !important; max-width: none; }
.exam-shell {
  border: 0; border-radius: 0; background: #fff; margin: 0;
  font-family: Arial, Helvetica, sans-serif; color: #000;
}
body.exam-running .exam-shell { padding-top: calc(var(--exam-bar-h) + var(--exam-timebar-h)); padding-bottom: var(--exam-foot-h); }
.exam-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 55;
  height: var(--exam-bar-h); min-height: 0; padding: 0 22px; gap: 16px;
  display: flex; flex-direction: row; align-items: center; justify-content: flex-start;
  background: #fff; color: #000; border: 0; border-bottom: 1px solid #c9c9c9; border-radius: 0;
}
.exam-bar-mark { flex: none; width: 30px; height: 30px; }
.exam-bar-left { min-width: 0; flex: 0 1 auto; }
.exam-eyebrow { margin: 0; font-family: Arial, Helvetica, sans-serif; font-weight: 700; text-transform: none; letter-spacing: 0; font-size: 16px; color: #000; }
.exam-candidate { margin: 2px 0 0; font-size: 13px; color: #444; overflow-wrap: anywhere; }
.exam-bar #examPhraseBtn { margin-left: auto; }
.exam-clock-wrap { display: flex; align-items: center; gap: 12px; flex: none; margin-left: auto; }
.exam-bar #examPhraseBtn ~ .exam-clock-wrap { margin-left: 0; }
.exam-clock { font-family: Arial, Helvetica, sans-serif; font-size: 18px; font-weight: 700; letter-spacing: 0; color: #000; }
.exam-clock.is-warning, .exam-clock.is-over { color: #c8102e; }
.exam-clock.is-hidden { display: none; }
.exam-clock-toggle {
  height: 32px; padding: 0 14px; border: 1px solid #767676; border-radius: 3px;
  background: #fff; color: #000; font: 700 13px Arial, Helvetica, sans-serif; cursor: pointer;
}
.exam-clock-toggle:hover { background: #000; color: #fff; }
.exam-timebar { position: fixed; top: var(--exam-bar-h); left: 0; right: 0; z-index: 55; height: var(--exam-timebar-h); background: #e3e3e3; border: 0; }
.exam-timebar > span { display: block; height: 100%; width: 0; background: #555; transition: width 1s linear; }
.exam-status { margin: 0; padding: 8px 22px; border: 0; border-bottom: 1px solid #b00020; border-radius: 0; background: #fdecee; color: #000; font-weight: 700; }
.exam-body { --exam-split: 50%; padding: 0; }
.exam-pane {
  display: grid; grid-template-columns: var(--exam-split) 26px minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr);
  height: calc(100vh - var(--exam-bar-h) - var(--exam-timebar-h) - var(--exam-foot-h));
}
.exam-pane.hidden { display: none; }
.exam-brief {
  grid-column: 1 / -1; margin: 18px 22px 14px; padding: 14px 22px;
  background: #f0f0ee; border: 1px solid #cfcfcb; border-radius: 4px;
}
.exam-brief-part { display: block; font: 700 18px Arial, Helvetica, sans-serif; }
.exam-brief-text { margin: 4px 0 0; font-size: 18px; line-height: 1.4; }
.exam-left, .exam-right { min-width: 0; overflow-y: auto; }
.exam-left { padding: 8px 18px 24px 22px; }
.exam-right { padding: 8px 22px 24px 18px; }
.exam-divider {
  position: relative; cursor: col-resize; background: #9b9b9b; touch-action: none;
}
.exam-divider:hover, .exam-divider:focus-visible, .exam-divider.is-drag { background: #7d7d7d; outline: 0; }
.exam-divider-grip {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 46px; height: 46px; display: grid; place-items: center;
  background: #fff; color: #000; border: 3px solid #1a73e8; border-radius: 5px;
  font: 700 22px/1 Arial, Helvetica, sans-serif; pointer-events: none;
}
.exam-topic { padding: 0; margin: 0; background: none; border: 0; border-radius: 0; box-shadow: none; }
.exam-topic-text { margin: 0; font-weight: 700; font-size: 18px; line-height: 1.65; white-space: pre-line; }
.exam-figures { margin: 22px 0 0; padding: 0; background: none; border: 0; border-radius: 0; box-shadow: none; display: block; }
.exam-figures img { display: block; max-width: 100%; max-height: none; width: auto; height: auto; margin: 0 0 12px; border: 0; border-radius: 0; cursor: zoom-in; }
.exam-figure-missing { margin: 0; font-size: 14px; color: #444; }
.exam-right { display: flex; flex-direction: column; gap: 8px; padding-bottom: 96px; }
.exam-input {
  flex: 1 1 auto; width: 100%; min-height: 240px; box-sizing: border-box; padding: 14px 16px;
  border: 1px solid #767676; border-radius: 3px; box-shadow: none; resize: none;
  font: 18px/1.6 Arial, Helvetica, sans-serif; color: #000; background: #fff;
}
.exam-input:focus { outline: 2px solid #1a73e8; outline-offset: 0; box-shadow: none; }
.exam-input[readonly] { background: #f4f4f4; }
.exam-count { flex: none; margin: 0; padding: 0; background: none; border: 0; border-radius: 0; text-align: right; font: 18px Arial, Helvetica, sans-serif; color: #000; }
.exam-foot {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 55;
  height: var(--exam-foot-h); padding: 0 0 0 22px; gap: 4px;
  display: flex; align-items: stretch;
  background: #fff; border-top: 1px solid #c9c9c9;
}
.exam-tabs { display: flex; gap: 8px; margin: 0 auto 0 0; border: 0; }
.exam-tab {
  position: relative; min-width: 150px; padding: 0 22px; display: flex; align-items: center; gap: 12px;
  border: 0; border-radius: 0; background: #fff; color: #444; box-shadow: none;
  font: 18px Arial, Helvetica, sans-serif; cursor: pointer; text-align: left;
}
.exam-tab.is-active { color: #000; font-weight: 700; }
.exam-tab.is-active::before { content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 4px; background: #bdbdbd; }
.exam-tab-count { font-weight: 400; font-size: 17px; color: #666; }
/* Mũi tên Part trước/sau: hai ô vuông to nổi ở góc phải dưới vùng viết. */
.exam-foot-nav { position: fixed; right: 38px; bottom: calc(var(--exam-foot-h) + 22px); z-index: 56; display: flex; gap: 4px; }
.exam-arrow { width: 76px; height: 76px; padding: 0; border: 0; border-radius: 3px; background: #000; color: #fff; font: 700 38px/1 Arial, Helvetica, sans-serif; cursor: pointer; }
.exam-arrow:hover:not(:disabled) { background: #333; }
.exam-arrow:disabled { background: #dcdcdc; color: #fff; cursor: default; }
.exam-submit.btn.btn-primary {
  min-height: 0; height: auto; padding: 0 28px; border-radius: 0; box-shadow: none;
  background: #e6e6e6; color: #000; font: 700 16px Arial, Helvetica, sans-serif;
}
@media (hover: hover) { .exam-submit.btn.btn-primary:hover:not(:disabled) { background: #cfcfcf; } }
/* Ngăn từ vựng (chế độ Luyện tập) đẩy trang sang trái ≥1180px: hai thanh cố
   định phải co lại theo, và ngăn kéo chiếm trọn chiều cao. */
@media (min-width: 1180px) {
  body.phrase-open .exam-bar, body.phrase-open .exam-foot, body.phrase-open .exam-timebar { right: var(--phrase-w); }
  body.phrase-open .exam-foot-nav { right: calc(var(--phrase-w) + 38px); }
}
body.exam-running .phrase-drawer { top: 0; }
@media (max-width: 900px) {
  :root { --exam-bar-h: 52px; }
  .exam-bar { padding: 0 12px; gap: 10px; }
  .exam-candidate { display: none; }
  .exam-bar #examPhraseBtn { display: none; }
  body.exam-running .exam-shell { padding-bottom: calc(var(--exam-foot-h) + 8px); }
  .exam-pane { display: block; height: auto; }
  .exam-brief { margin: 12px 12px 8px; padding: 10px 14px; }
  .exam-brief-part, .exam-brief-text { font-size: 16px; }
  .exam-divider { display: none; }
  .exam-left, .exam-right { overflow: visible; padding: 12px 14px; }
  .exam-right { padding-bottom: 12px; }
  .exam-input { min-height: 52vh; }
  .exam-tab { min-width: 0; padding: 0 14px; font-size: 16px; }
  .exam-tab-count { display: none; }
  .exam-foot { padding-left: 4px; }
  .exam-foot-nav { position: static; gap: 2px; align-items: center; }
  .exam-arrow { width: 48px; height: 100%; border-radius: 0; font-size: 24px; }
}

/* ===========================================================================
   13. Kết quả thi (B11)
   ======================================================================== */
.exam-report { margin: 0 0 48px; }
.exam-report-meta { margin: 0 0 16px; padding: 12px 16px; border: 2px solid var(--bur); border-radius: 4px; background: var(--bur-wash); font-weight: 600; }
.exam-report-top { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(280px, 1fr); gap: 26px; margin-bottom: 30px; }
.exam-hero { padding: 28px 30px; background: var(--ink); color: #fff; border: 2px solid var(--ink); border-radius: 4px; box-shadow: 8px 8px 0 var(--bur); }
.exam-hero-eyebrow { margin: 0 0 14px; font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.1em; color: #E7E5DE; }
.exam-hero-label { margin: 0; font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; color: var(--bur-soft); }
.exam-hero-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin: 4px 0 16px; }
.exam-hero-band { font-family: var(--font-display); font-weight: 700; font-size: 112px; line-height: 0.95; }
.exam-hero-part { display: flex; flex-direction: column; gap: 6px; padding: 10px 14px; border: 2px solid #57564F; border-radius: 4px; }
.exam-hero-part-label { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em; color: #E7E5DE; }
.exam-hero-part-band { font-family: var(--font-display); font-weight: 700; font-size: 28px; }
.exam-hero-formula { margin: 0; font-size: 15px; color: #fff; }
.exam-next { display: flex; flex-direction: column; gap: 12px; padding: 24px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); }
.exam-next h3 { margin: 0; font-size: 20px; }
.exam-next p { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.5; }
.exam-next-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 4px; }
.exam-next-actions .btn.btn-primary { grid-column: 1 / -1; width: 100%; min-height: 52px; justify-content: center; }
.exam-next-actions .btn-secondary { width: 100%; min-height: 48px; justify-content: center; font-size: 14.5px; padding: 0 10px; }
.exam-result-tabs { display: inline-flex; border: 2px solid var(--ink); border-bottom: 0; border-radius: 4px 4px 0 0; background: var(--paper); overflow: hidden; }
.exam-result-tab { display: inline-flex; align-items: center; gap: 12px; height: 54px; padding: 0 20px; border: 0; border-right: 2px solid var(--ink); background: var(--paper); color: var(--ink); font: inherit; font-weight: 700; cursor: pointer; }
.exam-result-tab:last-child { border-right: 0; }
.exam-result-tab.is-active { background: var(--ink); color: #fff; }
.exam-result-tab.is-active .b-chip { background: transparent; color: #fff; border-color: #fff; }
.exam-result-tab-name { font-family: var(--font-display); font-size: 17px; }
.exam-result-tab-band { font-family: var(--font-display); font-size: 20px; }
.exam-result { border: 0; padding: 0; margin: 0; }
.exam-crit-card { padding: 22px 24px; background: var(--paper); border: 2px solid var(--ink); border-radius: 0 4px 4px 4px; box-shadow: var(--b-shadow-lg); margin-bottom: 26px; }
.exam-result-topic { margin: 0 0 16px; font-family: var(--font-mono); font-weight: 700; font-size: 12px; line-height: 1.5; color: var(--ink-2); }
.exam-crit-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 2px solid var(--ink); border-radius: 4px; }
.exam-crit { padding: 16px 18px; border: 0; border-right: 2px solid var(--line-b); border-radius: 0; background: none; }
.exam-crit:last-child { border-right: 0; }
.exam-crit-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.exam-crit-names { display: flex; flex-direction: column; }
.exam-crit-code { font-family: var(--font-mono); font-size: 13px; }
.exam-crit-name { font-size: 13.5px; color: var(--ink-2); }
.exam-crit-score { font-family: var(--font-display); font-weight: 700; font-size: 28px; line-height: 1; }
.exam-crit-bar { display: grid; grid-template-columns: repeat(11, minmax(0, 1fr)); gap: 3px; margin: 14px 0 12px; }
.exam-crit-bar > span { height: 12px; border: 2px solid var(--ink); border-radius: 2px; }
.exam-crit-bar > span.is-on { background: var(--ink); }
.exam-crit-comment { margin: 0; font-size: 13.5px; line-height: 1.5; color: var(--ink-2); }
.exam-summary { margin: 16px 0 0; font-size: 15px; line-height: 1.6; }
.exam-result-lower { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 26px; align-items: start; }
.exam-essay-card, .exam-notes-card { background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); overflow: hidden; }
.exam-card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 2px solid var(--ink); }
.exam-card-head h3 { margin: 0; font-size: 18px; }
.exam-card-meta { font-family: var(--font-mono); font-weight: 700; font-size: 11.5px; letter-spacing: 0.04em; color: var(--ink-2); }
.exam-essay-body { padding: 20px 22px; font-size: 16px; line-height: 1.85; }
.exam-essay-body p { margin: 0 0 16px; white-space: pre-wrap; }
.exam-mark { background: var(--bur-wash); color: var(--ink); box-shadow: inset 0 -3px 0 var(--bur); padding: 1px 0; }
.exam-mark-num { margin-left: 3px; padding: 0 5px; border-radius: 3px; background: var(--bur); color: #fff; font-family: var(--font-mono); font-size: 10.5px; font-weight: 700; }
.exam-notes { list-style: none; margin: 0; padding: 0; }
.exam-note { padding: 16px 20px; border-top: 2px solid var(--line-b); border-left: 0; }
.exam-note:first-child { border-top: 0; }
.exam-note-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.exam-note-num { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 3px; background: var(--bur); color: #fff; font-family: var(--font-mono); font-weight: 700; font-size: 12px; }
.exam-note-tag { padding: 1px 6px; border: 2px solid var(--ink); border-radius: 3px; font-family: var(--font-mono); font-weight: 700; font-size: 11px; background: var(--paper); color: var(--ink); }
.exam-note-major { font-weight: 700; font-size: 13px; color: var(--bur); }
.exam-note-sentence { margin: 0 0 4px; font-style: italic; color: var(--ink-2); font-size: 14px; }
.exam-note-problem { margin: 0; font-size: 14.5px; line-height: 1.55; }
@media (max-width: 1100px) {
  .exam-report-top, .exam-result-lower { grid-template-columns: minmax(0, 1fr); }
  .exam-crit-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .exam-crit:nth-child(2) { border-right: 0; }
  .exam-crit:nth-child(-n+2) { border-bottom: 2px solid var(--line-b); }
}
@media (max-width: 640px) {
  .exam-crit-grid { grid-template-columns: minmax(0, 1fr); }
  .exam-crit { border-right: 0; border-bottom: 2px solid var(--line-b); }
  .exam-hero-band { font-size: 80px; }
  .exam-next-actions { grid-template-columns: minmax(0, 1fr); }
}

/* ===========================================================================
   14. Trang chủ (B02)
   ======================================================================== */
#hubView { padding-bottom: 64px; }
#hubView .hub-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 360px); gap: 30px; align-items: start; margin: 4px 0 30px; }
#hubView .hub-head { margin: 0; }
#hubView .hub-name { margin: 4px 0 26px; font-family: var(--font-display); font-weight: 700; font-size: clamp(32px, 3.6vw, 52px); line-height: 1.08; color: var(--ink); letter-spacing: 0; }
#hubView .hub-task-row { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
#hubView .hub-task-row.hidden { display: none; }
#hubView .hub-task-seg .seg-btn { height: 52px; padding: 0 22px; display: inline-flex; align-items: baseline; gap: 6px; font-size: 16px; }
#hubView .seg-count { font-family: var(--font-mono); font-size: 12px; font-weight: 700; }
#hubView .seg-count::before { content: "· "; }
#hubView .hub-band-card {
  padding: 24px 26px; background: var(--ink); color: #fff;
  border: 2px solid var(--ink); border-radius: 4px; box-shadow: 8px 8px 0 var(--bur);
}
#hubView .hub-band-card.hidden { display: none; }
.hub-band-label { margin: 0; font-family: var(--font-mono); font-weight: 700; font-size: 11.5px; letter-spacing: 0.1em; color: #E7E5DE; }
.hub-band-row { display: flex; align-items: center; gap: 14px; margin: 6px 0 10px; }
.hub-band-value { font-family: var(--font-display); font-weight: 700; font-size: 84px; line-height: 1; }
.hub-band-trend { display: flex; flex-direction: column; font-size: 13.5px; color: #E7E5DE; }
.hub-band-trend strong { font-family: var(--font-mono); font-size: 18px; color: #fff; }
.hub-band-trend.is-up strong { color: var(--bur-soft); }
.hub-band-note { margin: 0; font-size: 14.5px; color: #E7E5DE; }

/* Thẻ bài dở. */
#hubView #hubDraft { margin-bottom: 30px; }
#hubView .hub-draft-card {
  display: flex; align-items: center; justify-content: space-between; gap: 22px; flex-wrap: wrap;
  padding: 22px 24px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: 6px 6px 0 var(--bur);
}
#hubView .hub-draft-head { flex: 1 1 380px; min-width: 0; display: flex; gap: 14px; align-items: flex-start; justify-content: space-between; }
#hubView .hub-draft-title { font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--ink); display: flex; align-items: center; gap: 10px; margin: 0 0 6px; }
#hubView .hub-draft-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--bur); }
#hubView .hub-draft-note { margin: 0; font-size: 15px; color: var(--ink-2); }
#hubView .hub-draft-time { margin: 6px 0 0; font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--muted); }
#hubView .hub-draft-task { padding: 3px 8px; border: 2px solid var(--ink); border-radius: 4px; font-family: var(--font-mono); font-weight: 700; font-size: 11px; background: var(--paper); color: var(--ink); }
#hubView .hub-draft-actions { display: flex; gap: 12px; flex-wrap: wrap; }
#hubView .hub-draft-actions .hub-action { width: auto; margin: 0; }
#hubView .hub-action-quiet { background: var(--paper); color: var(--ink); }
@media (hover: hover) { #hubView .hub-action-quiet:hover:not(:disabled) { background: var(--paper); } }

/* Việc nên làm tiếp + đề gợi ý. */
#hubView .hub-section { margin-top: 0; margin-bottom: 30px; }
#hubView .next-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 26px; align-items: start; }
#hubView .next-grid.is-single { grid-template-columns: minmax(0, 1fr); }
#hubView .next-card { padding: 0; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); overflow: hidden; display: block; }
#hubView .next-card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 22px; background: var(--ink); color: #fff; }
#hubView .next-card-head h2 { margin: 0; font-family: var(--font-mono); font-weight: 700; font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; color: #fff; }
#hubView .next-card-head span { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em; color: #E7E5DE; }
#hubView .next-main { padding: 24px 26px; display: flex; flex-direction: column; gap: 16px; }
#hubView .next-title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: clamp(22px, 2.2vw, 30px); line-height: 1.2; }
#hubView .next-why { margin: 0; font-size: 15.5px; line-height: 1.6; color: var(--ink-2); }
#hubView .next-do-box { display: flex; gap: 16px; align-items: flex-start; padding: 16px 18px; border: 2px dashed var(--bur); border-radius: 4px; background: var(--bur-wash); }
#hubView .next-do-mark { flex: none; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 4px; background: var(--ink); color: #fff; font-weight: 700; }
#hubView .next-eyebrow { display: block; margin-bottom: 4px; font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; color: var(--ink-2); text-transform: uppercase; }
#hubView .next-do { margin: 0; font-weight: 700; font-size: 16px; line-height: 1.5; }
#hubView .next-note { padding-top: 14px; border-top: 2px solid var(--ink); background: none; border-left: 0; padding-left: 0; }
#hubView .next-note-body { margin: 0; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
#hubView .chip-tag.is-bur { background: var(--bur); color: #fff; }
#hubView .chip-tag.is-ink { background: var(--ink); color: #fff; font-family: var(--font-mono); font-size: 11px; border-color: var(--ink); }
#hubView .next-side { display: flex; flex-direction: column; gap: 18px; }
#hubView .next-side-label { font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.1em; color: var(--ink); }
#hubView .next-suggest { display: flex; flex-direction: column; gap: 12px; padding: 18px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow); }
#hubView .next-suggest-top { display: flex; align-items: center; gap: 10px; }
#hubView .next-suggest-thumb { flex: none; width: 64px; height: 40px; object-fit: cover; border: 2px solid var(--ink); border-radius: 3px; }
#hubView .next-suggest-body { display: flex; gap: 14px; align-items: flex-start; }
#hubView .next-suggest-prompt { margin: 0; flex: 1 1 auto; font-size: 15px; line-height: 1.5; }
#hubView .next-suggest.is-big .next-suggest-prompt { font-weight: 700; font-size: 16.5px; }
#hubView .next-suggest-art { flex: none; width: 132px; aspect-ratio: 16 / 10; object-fit: cover; border: 2px solid var(--ink); border-radius: 4px; }
#hubView .next-suggest-reason { margin: 0; font-size: 13.5px; line-height: 1.5; color: var(--ink-2); }
#hubView .next-suggest-actions { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
#hubView .next-suggest-actions .btn, #hubView .next-suggest-actions .btn-secondary { width: 100%; justify-content: center; min-height: 46px; }
#hubView .next-empty { padding: 20px 22px; background: var(--paper); border: 2px dashed var(--ink); border-radius: 4px; font-size: 15px; }

/* Biểu đồ band + điểm thành phần. */
#hubView .hub-progress-grid { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(280px, 1fr); gap: 26px; align-items: stretch; }
#hubView .hub-chart-card, #hubView .hub-blockers {
  display: block; padding: 22px 24px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg);
}
#hubView .hub-chart-card.hidden, #hubView .hub-blockers.hidden { display: none; }
.hub-chart-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.hub-chart-head h3 { margin: 0; font-size: 20px; }
.hub-chart-legend { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); }
.lg-solid, .lg-dash { display: inline-block; width: 22px; height: 0; border-top: 3px solid var(--ink); margin-left: 8px; }
.lg-dash { border-top: 2px dashed var(--muted-2); }
.hub-chart-facts { display: flex; gap: 18px; flex-wrap: wrap; margin: 8px 0 6px; font-size: 14px; color: var(--ink-2); }
.hub-chart { display: block; width: 100%; height: auto; overflow: visible; }
.hub-chart .grid { stroke: var(--line-b); stroke-width: 1; }
.hub-chart .base { stroke: var(--ink); stroke-width: 2; }
.hub-chart .axis { fill: var(--ink-2); font-family: var(--font-mono); font-size: 11px; }
.hub-chart .axis.tag { font-size: 9.5px; font-weight: 700; fill: var(--ink); }
.hub-chart .gain { fill: var(--bur-wash); stroke: none; }
.hub-chart .before { fill: none; stroke: var(--muted-2); stroke-width: 2; stroke-dasharray: 5 5; }
.hub-chart .after { fill: none; stroke: var(--ink); stroke-width: 2.5; }
.hub-chart .hit { fill: transparent; }
.hub-chart .dot { fill: var(--paper); stroke: var(--ink); stroke-width: 2.5; }
.hub-chart .pt.is-last .dot { fill: var(--bur); stroke: var(--ink); }
.hub-chart .dot-before { fill: var(--paper); stroke: var(--muted-2); stroke-width: 1.5; }
.hub-chart .val { font-family: var(--font-mono); font-weight: 700; font-size: 11.5px; fill: var(--ink); }
.hub-chart .pt:hover .dot { stroke-width: 3.5; }
.hub-chart-foot { margin: 6px 0 0; font-size: 13.5px; color: var(--ink-2); }
#hubView .hub-blockers .hub-recent-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-bottom: 12px; border-bottom: 2px solid var(--line-b); margin-bottom: 4px; }
#hubView .hub-recent-head h3 { margin: 0; font-size: 20px; }
.hub-card-meta { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em; color: var(--ink-2); }
#hubView .hub-blocker { padding: 12px 0; border-bottom: 2px solid var(--line-b); }
#hubView .hub-blocker-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
#hubView .hub-blocker-name { font-size: 13.5px; color: var(--ink-2); font-weight: 500; }
#hubView .hub-blocker-name strong { color: var(--ink); font-family: var(--font-mono); font-size: 13px; }
#hubView .hub-blocker-verdict { display: inline-flex; align-items: baseline; gap: 6px; background: none; padding: 0; font-size: 13px; color: var(--ink-2); font-family: var(--font-body); letter-spacing: 0; text-transform: none; }
#hubView .hub-blocker-verdict strong { font-family: var(--font-display); font-size: 22px; color: var(--ink); }
.hub-cells { display: grid; grid-template-columns: repeat(11, minmax(0, 1fr)); gap: 3px; }
.hub-cells > span { height: 14px; border: 2px solid var(--ink); border-radius: 2px; background: var(--paper); }
.hub-cells.is-good > span.is-on { background: var(--ink); }
.hub-cells.is-mid > span.is-on { background: #A3A198; }
.hub-cells.is-bad > span.is-on { background: var(--bur); }
#hubView .hub-blocker-foot { margin: 12px 0 0; font-size: 13px; color: var(--ink-2); }

/* Chẩn đoán + bài gần đây + trường từ vựng. */
#hubView .hub-row-coach { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(280px, 1fr); gap: 26px; align-items: start; margin-bottom: 30px; }
#hubView .hub-row-coach-side { display: flex; flex-direction: column; gap: 26px; }
#hubView .hub-coach { margin: 0; padding: 0; border: 0; background: none; box-shadow: none; }
#hubView .hub-coach .section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
#hubView .hub-coach .section-title { font-size: clamp(22px, 2.2vw, 28px); }
#hubView .coach-updated { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.06em; color: var(--ink-2); }
#hubView .coach-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px; margin-bottom: 18px; }
#hubView .coach-item { display: flex; flex-direction: column; gap: 10px; padding: 20px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow); }
#hubView .coach-item-head { display: flex; align-items: center; gap: 8px; }
#hubView .coach-rank { padding: 2px 7px; border-radius: 3px; background: var(--ink); color: #fff; font-family: var(--font-display); font-weight: 700; font-size: 15px; }
#hubView .coach-crit { padding: 2px 6px; border: 2px solid var(--ink); border-radius: 3px; background: var(--paper); color: var(--ink); font-family: var(--font-mono); font-weight: 700; font-size: 11px; }
#hubView .coach-name { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 18px; line-height: 1.3; }
#hubView .coach-why { margin: 0; font-size: 14.5px; line-height: 1.55; color: var(--ink-2); }
#hubView .coach-do { padding: 12px 14px; border-radius: 4px; background: var(--bur-wash); font-size: 14.5px; line-height: 1.5; border: 0; }
#hubView .coach-do-label { font-weight: 700; color: var(--ink); }
#hubView .coach-all { background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-sm); }
#hubView .coach-all-head { padding: 14px 18px; font-weight: 700; }
#hubView .coach-row { border-top: 2px solid var(--line-b); }
#hubView .hub-recent { display: block; padding: 0; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); }
#hubView .hub-recent.hidden { display: none; }
#hubView .hub-recent .hub-recent-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 2px solid var(--ink); margin: 0; }
#hubView .hub-recent .hub-recent-head h3 { font-size: 17px; }
#hubView .hub-recent-all { font-weight: 700; font-size: 14px; color: var(--ink); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }
#hubView .hub-recent-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 18px; border-bottom: 2px solid var(--line-b); text-decoration: none; color: var(--ink); background: none; }
#hubView .hub-recent-row:last-child { border-bottom: 0; }
#hubView .hub-recent-row:hover { background: var(--bur-wash); }
.hub-recent-copy { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.hub-recent-meta { display: flex; align-items: center; gap: 8px; }
#hubView .hub-recent-date { font-family: var(--font-mono); font-weight: 700; font-size: 11px; color: var(--ink-2); }
#hubView .hub-recent-topic { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#hubView .hub-recent-band { flex: none; padding: 4px 8px; border: 2px solid var(--ink); border-radius: 4px; font-family: var(--font-mono); font-weight: 700; font-size: 12.5px; }
.hist-mode { padding: 1px 6px; border-radius: 3px; background: var(--ink); color: #fff; font-family: var(--font-mono); font-weight: 700; font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; border: 0; }
.hist-mode.is-practice { background: var(--paper); color: var(--ink); border: 2px solid var(--ink); }
#hubDomain .coach-card { padding: 20px; background: var(--bur-wash); border: 2px solid var(--bur); border-radius: 4px; box-shadow: 6px 6px 0 var(--bur); }
#hubDomain .coach-card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
#hubDomain .coach-card-head .hub-eyebrow { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: 0; color: var(--ink); text-transform: none; }
#hubDomain .coach-card-note { padding: 2px 6px; border: 2px solid var(--ink); border-radius: 3px; background: var(--paper); font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; }
#hubDomain .coach-box { margin: 0 0 12px; padding: 0; border: 0; background: none; }
#hubDomain .coach-box-label { font-weight: 700; font-size: 14px; color: var(--ink); }
#hubDomain .coach-pillar, #hubDomain .coach-task-reason { margin: 2px 0 0; font-size: 14px; line-height: 1.5; color: var(--ink-2); }
#hubDomain .coach-chip { display: inline-block; margin: 6px 6px 0 0; padding: 4px 8px; border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); font-weight: 600; font-size: 13px; }

/* Bắt đầu bài mới. */
#hubView #hubStart .section-title { font-size: clamp(22px, 2.2vw, 28px); margin-bottom: 16px; }
.hub-start-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(280px, 1fr); gap: 22px; align-items: stretch; }
.hub-entry {
  display: flex; flex-direction: column; gap: 10px; padding: 20px;
  background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow);
  text-decoration: none; color: var(--ink); transition: transform .12s ease, box-shadow .12s ease;
}
@media (hover: hover) { .hub-entry:not(.is-locked):hover { transform: translate(-2px, -2px); box-shadow: var(--b-shadow-lg); } }
.hub-entry.is-locked { opacity: 0.55; cursor: not-allowed; box-shadow: none; }
.hub-entry-icon { width: 48px; height: 48px; display: grid; place-items: center; border: 2px solid var(--ink); border-radius: 4px; }
.hub-entry-icon svg { width: 22px; height: 22px; fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.hub-entry strong { font-family: var(--font-display); font-size: 20px; }
.hub-entry span:last-child { font-size: 14.5px; line-height: 1.5; color: var(--ink-2); }
.hub-modes-box { padding: 18px; border: 2px dashed var(--ink); border-radius: 4px; background: var(--bur-wash); }
.hub-modes-label { margin: 0 0 12px; font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; color: var(--ink-2); }
.mode-box { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mode-box-item { display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; text-decoration: none; color: var(--ink); }
a.mode-box-item:hover { background: var(--bur-wash); }
.mode-box-name { font-size: 15px; }
.mode-box.is-locked .mode-box-item { opacity: 0.55; }
.hub-start-blocked { margin: 14px 0 0; font-weight: 600; color: var(--bur); }
/* Hub ĐGNL: một thẻ ngang dưới "Bắt đầu bài mới" (icon trái, chữ phải). */
.hub-entry-wide { display: grid; grid-template-columns: 48px minmax(0, 1fr); column-gap: 16px; row-gap: 4px; align-items: center; }
.hub-entry-wide .hub-entry-icon { grid-row: span 2; }

@media (max-width: 1100px) {
  #hubView .hub-top, #hubView .next-grid, #hubView .hub-progress-grid, #hubView .hub-row-coach { grid-template-columns: minmax(0, 1fr); }
  .hub-start-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .hub-modes-box { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .hub-start-grid { grid-template-columns: minmax(0, 1fr); }
  #hubView .hub-band-value { font-size: 64px; }
  #hubView .next-suggest-body { flex-direction: column-reverse; }
  #hubView .next-suggest-art { width: 100%; aspect-ratio: 16 / 7; }
}
#hubView .hub-task-seg .seg-btn { align-items: center; }
body.has-shell .hub-main, body.has-shell main.hub-main { padding-top: 32px; }
.hist-mode.is-exam { color: #fff; background: var(--ink); border: 0; }

/* ===========================================================================
   15. Lịch sử bài làm (B12)
   ======================================================================== */
.hist-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: 26px; }
.hist-top .page-head { margin: 0; }
.hist-tiles { display: flex; gap: 14px; flex-wrap: wrap; }
.hist-tiles.hidden { display: none; }
.hist-tile { display: flex; flex-direction: column; gap: 6px; min-width: 116px; padding: 12px 16px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-sm); }
.hist-tile.is-dark { background: var(--ink); color: #fff; box-shadow: 5px 5px 0 var(--bur); }
.hist-tile-label { font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.08em; }
.hist-tile-value { font-family: var(--font-display); font-weight: 700; font-size: 28px; line-height: 1; }
.hist-chart-card { padding: 22px 24px; margin-bottom: 26px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); }
.hist-chart-card.hidden { display: none; }
.hist-filters { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 14px 16px; margin-bottom: 26px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-sm); }
.hist-filters.hidden { display: none; }
.hist-filter-label { font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.1em; color: var(--ink-2); }
.hist-seg { box-shadow: none; }
.hist-seg .seg-btn { height: 42px; padding: 0 14px; font-size: 15px; display: inline-flex; align-items: center; gap: 6px; }
.hist-seg .seg-count { font-family: var(--font-mono); font-size: 11px; }
.hist-search { flex: 1 1 240px; min-width: 0; }
.hist-month { margin: 0 0 12px; font-family: var(--font-mono); font-weight: 700; font-size: 12px; letter-spacing: 0.1em; color: var(--ink-2); }
.hist-group { margin-bottom: 26px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); overflow: hidden; }
.hist-card { margin: 0; border: 0; border-bottom: 2px solid var(--line-b); border-radius: 0; box-shadow: none; background: none; }
.hist-card:last-child { border-bottom: 0; }
.hist-card > summary { padding: 12px 18px; }
.hist-card[open] > summary { background: var(--bur-wash); border-bottom: 2px solid var(--line-b); }
.hist-card > summary:hover { background: var(--bur-wash); }
.hist-summary { gap: 16px; align-items: center; }
.hist-summary-line { display: grid; grid-template-columns: 62px 52px 110px 64px minmax(0, 1fr); align-items: center; gap: 14px; min-width: 0; flex: 1 1 auto; }
.hist-thumb { width: 60px; height: 38px; display: grid; place-items: center; border: 2px solid var(--ink); border-radius: 3px; background: var(--paper); overflow: hidden; }
.hist-thumb.is-exam { background: var(--ink); color: #fff; }
.hist-thumb svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.hist-thumb img { width: 100%; height: 100%; object-fit: cover; }
.hist-date { font-family: var(--font-mono); font-weight: 700; font-size: 12.5px; color: var(--ink); }
.hist-summary-line .hist-mode { justify-self: start; }
.hist-mode.is-lesson { background: var(--paper); color: var(--ink); border: 2px solid var(--ink); }
.hist-task { padding: 0; border: 0; background: none; font-weight: 700; font-size: 14.5px; color: var(--ink); font-family: var(--font-body); letter-spacing: 0; text-transform: none; }
.hist-topic { font-size: 14.5px; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hist-band-num { font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--ink); }
.hist-band-final { color: var(--ink); }
.hist-band-ceiling { font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; color: var(--ink-2); text-transform: uppercase; }
.hist-body { padding: 18px 22px 22px; }
.hist-chips .chip { border: 2px solid var(--ink); border-radius: 4px; background: var(--bur); color: #fff; font-family: var(--font-mono); font-weight: 700; }
.hist-chips .chip .label, .hist-chips .chip .value { color: #fff; }
.hist-essay { border: 2px solid var(--ink); border-radius: 4px; }
.hist-fix { border: 2px solid var(--line-b); border-radius: 4px; }
@media (max-width: 900px) {
  .hist-summary-line { grid-template-columns: 56px minmax(0, 1fr); row-gap: 4px; }
  .hist-summary-line .hist-date, .hist-summary-line .hist-mode, .hist-summary-line .hist-task { grid-column: 2; }
  .hist-summary-line .hist-thumb { grid-row: span 4; }
  .hist-topic { white-space: normal; }
}
.app-page { padding-top: 40px; }
.hist-topic { font-weight: 500; }

/* ===========================================================================
   16. Thư viện từ vựng (B13)
   ======================================================================== */
.lib-tabs { display: flex; gap: 0; border-bottom: 2px solid var(--ink); margin: 0 0 22px; }
.lib-tab {
  height: 50px; padding: 0 22px; margin-bottom: -2px;
  border: 2px solid transparent; border-bottom: 0; border-radius: 4px 4px 0 0;
  background: none; color: var(--ink); font-family: var(--font-body); font-weight: 700; font-size: 16px;
}
.lib-tab.is-on { background: var(--paper); border-color: var(--ink); color: var(--ink); }
.lib-tab::after { display: none; }
.lib-filters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)) auto; gap: 14px; align-items: end; margin-bottom: 22px; }
.lib-filter span { display: block; margin-bottom: 6px; opacity: 1; font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.lib-filter input, .lib-filter select { width: 100%; height: 46px; padding: 0 14px; border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); font-size: 15px; }
.lib-grid { gap: 22px; }
.vocab-card {
  display: flex; flex-direction: column; gap: 10px; padding: 18px 20px 0;
  background: var(--paper); border: 2px solid var(--ink); border-left-width: 2px; border-radius: 4px; box-shadow: var(--b-shadow);
}
.vocab-card.has-example { border-left-color: var(--ink); }
.vocab-card:focus-within { box-shadow: 6px 6px 0 var(--bur); }
.vocab-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin: 0; }
.vocab-card .vocab-term { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 22px; line-height: 1.15; }
.vocab-ipa { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-2); }
.vocab-pos { font-style: italic; font-size: 13px; color: var(--ink-2); }
.vocab-status { flex: none; padding: 2px 6px; border: 2px solid var(--bur); border-radius: 3px; color: var(--bur); font-family: var(--font-mono); font-weight: 700; font-size: 10px; letter-spacing: 0.04em; white-space: nowrap; }
.vocab-status.is-done { border-color: var(--ok); color: var(--ok); }
.vocab-card .vocab-note { margin: 0; font-size: 15.5px; font-weight: 600; opacity: 1; color: var(--ink); }
.vocab-def { margin: 0; font-size: 13.5px; color: var(--ink-2); }
.vocab-card textarea { min-height: 80px; padding: 12px; border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); font-family: var(--font-body); font-size: 14.5px; }
.vocab-card-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 6px -20px 0; padding: 12px 20px; border-top: 2px solid var(--line-b); }
.vocab-tag { padding: 3px 8px; border: 0; border-radius: 3px; background: var(--canvas-2); color: var(--ink); font-weight: 600; font-size: 12.5px; opacity: 1; }
.lib-del { border: 0; background: none; padding: 0; font-weight: 700; font-size: 13.5px; color: var(--ink); text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.lib-del:hover { color: var(--danger); }
@media (max-width: 900px) {
  .lib-filters { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .lib-filters { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 900px) { body.has-shell .container { padding-left: 16px; padding-right: 16px; } }

/* ===========================================================================
   17. Credit & tài khoản (B14)
   ======================================================================== */
#walletCard.up-wallet-summary {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0;
  padding: 0; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow-lg); overflow: hidden;
}
#walletCard.hidden { display: none; }
#walletCard > div { display: flex; flex-direction: column; gap: 4px; padding: 22px 26px; }
#walletCard > div:first-child { background: var(--ink); color: #fff; }
#walletCard > div:first-child .up-wallet-label, #walletCard > div:first-child .up-wallet-note { color: #E7E5DE; }
#walletCard .up-wallet-num { font-family: var(--font-display); font-weight: 700; font-size: 56px; line-height: 1; color: inherit; }
#walletCard > div:not(:first-child) .up-wallet-num { color: var(--ink); }
.up-wallet-label { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.up-wallet-note { font-size: 14px; color: var(--ink-2); }
#walletCard .up-current-plan-status { grid-column: 1 / -1; margin: 0; padding: 14px 26px; border-top: 2px solid var(--ink); background: var(--bur-wash); font-size: 14.5px; }
.up-eyebrow { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; color: var(--ink-2); }
.up-section-head h2 { font-family: var(--font-display); font-size: clamp(24px, 2.4vw, 30px); }
.up-package { padding: 22px; border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); box-shadow: var(--b-shadow); }
.up-package--featured { border-color: var(--ink); box-shadow: 6px 6px 0 var(--bur); }
.up-package-badge { padding: 2px 7px; border-radius: 3px; background: var(--ink); color: #fff; font-family: var(--font-mono); font-weight: 700; font-size: 10.5px; letter-spacing: 0.06em; }
.up-package-badge--crimson { background: var(--bur); }
.up-package-name { font-family: var(--font-display); font-weight: 700; font-size: 26px; color: var(--ink); }
.up-package-credits { font-family: var(--font-mono); font-weight: 700; font-size: 15px; letter-spacing: 0.04em; color: var(--ink); }
.up-price-now { font-family: var(--font-display); font-weight: 700; color: var(--ink); }
.up-package-annotation { color: var(--ink-2); }
.up-buy-btn {
  min-height: 48px; border: 2px solid var(--ink); border-radius: 4px;
  background: var(--bur); color: #fff; box-shadow: var(--b-shadow-sm); font-weight: 700; font-size: 15.5px;
}
.up-buy-btn:hover:not(:disabled) { background: var(--bur); transform: translate(-2px, -2px); box-shadow: var(--b-shadow); }
.up-package.is-locked { opacity: 0.6; box-shadow: none; }
.up-package.is-current { opacity: 1; box-shadow: var(--b-shadow); }
.up-package.is-locked .up-buy-btn { background: var(--paper); color: var(--ink-2); box-shadow: none; opacity: 1; }
.up-sprint-offer { border: 2px solid var(--ink); box-shadow: 6px 6px 0 var(--bur); }
.up-pay { border: 2px solid var(--ink); border-radius: 4px; box-shadow: 6px 6px 0 var(--bur); background: var(--paper); }
.up-pay-qr { border: 2px solid var(--ink); border-radius: 4px; }
.up-policy, details.up-policy { border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); }
#account.card { box-shadow: var(--b-shadow-lg); }
@media (max-width: 640px) {
  #walletCard.up-wallet-summary { grid-template-columns: minmax(0, 1fr); }
}

/* ===========================================================================
   18. Đăng nhập (B01, rút gọn theo Marc 2026-10-04): chỉ MỘT thẻ đăng nhập ở
   giữa màn hình trên nền giấy kẻ ô; Google nằm dưới nút Vào học.
   ======================================================================== */
body.login-mode header.top { display: none; }
#login-section {
  /* Căn giữa bằng margin:auto của thẻ, KHÔNG bằng place-items: thẻ Tạo tài khoản
     cao hơn màn laptop, và place-items:center sẽ cắt mất mép trên của nó. */
  display: flex; flex-direction: column; align-items: center;
  padding: 32px 16px; overflow-y: auto;
  background-color: var(--canvas);
  background-image: linear-gradient(var(--line-b) 1px, transparent 1px), linear-gradient(90deg, var(--line-b) 1px, transparent 1px);
  background-size: 28px 28px;
}
#login-section.hidden { display: none; }
.login-backdrop { display: none; }
.login-card {
  width: min(480px, 100%); margin: auto 0; flex: none;
  padding: 32px 32px 28px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: 8px 8px 0 var(--ink);
}
.login-card .login-form { padding: 0; gap: 14px; }
.login-title-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.login-title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 32px; color: var(--ink); }
.login-lang { position: static; margin: 0; }
.login-lead { margin: 0; font-size: 15px; color: var(--ink-2); }
.login-label { font-family: var(--font-body); font-weight: 700; font-size: 15px; letter-spacing: 0; text-transform: none; color: var(--ink); }
.login-field input { height: 50px; border: 2px solid var(--ink); border-radius: 4px; font-size: 16px; }
.login-btn.login-btn-google { background: var(--paper); color: var(--ink); }
@media (hover: hover) { .login-btn.login-btn-google:hover:not(:disabled) { background: var(--paper); } }
.login-divider { color: var(--ink-2); font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.login-divider::before, .login-divider::after { background: var(--line-b2); height: 2px; }
.login-alt { color: var(--ink-2); font-size: 14.5px; }
.login-alt a { color: var(--ink); font-weight: 700; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.login-brand { display: none; }
.login-segment span { border: 2px solid var(--ink); }
.login-error { border: 2px solid var(--danger); border-radius: 4px; background: #FCE4E8; color: var(--ink); }
@media (max-width: 520px) {
  .login-card { padding: 24px 18px 22px; box-shadow: 5px 5px 0 var(--ink); }
  .login-title { font-size: 28px; }
}

/* ===========================================================================
   20. Chỉnh mobile theo B02-m / B05-m / B12-m (đo ở 390px)
   ======================================================================== */
#hubView .next-main > .next-note:first-child { padding-top: 0; border-top: 0; }
@media (max-width: 900px) {
  #hubView .hub-name { margin-bottom: 16px; }
  #hubView .hub-task-row { gap: 10px; }
  #hubView .hub-task-seg { display: grid; grid-template-columns: 1fr 1fr; width: 100%; }
  #hubView .hub-task-seg .seg-btn { justify-content: center; padding: 0 10px; }
  #hubView .hub-band-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; column-gap: 12px; padding: 18px 20px; box-shadow: 6px 6px 0 var(--bur); }
  #hubView .hub-band-card .hub-band-row { display: contents; }
  #hubView .hub-band-card .hub-band-label { grid-column: 1; }
  #hubView .hub-band-card .hub-band-value { grid-column: 2; grid-row: 1 / span 3; font-size: 64px; }
  #hubView .hub-band-card .hub-band-trend { grid-column: 1; flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 6px; margin-top: 6px; }
  #hubView .hub-band-card .hub-band-note { display: none; }
  #hubView .next-card-head { padding: 12px 16px; }
  #hubView .next-card-head > span { display: none; }
  #hubView .next-main { padding: 18px 16px; }
  #topicSource.tabs > .tab { flex: 1 1 0; justify-content: center; }
  .hist-tiles:not(.hidden) { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
  .hist-tile { min-width: 0; padding: 10px 10px; justify-content: space-between; }
  .hist-tile-label { font-size: 9.5px; letter-spacing: 0.04em; }
  .hist-tile-value { font-size: 24px; }
}

/* ===========================================================================
   21. Hộp thoại xác nhận (B16) — S.dialog() trong session.js dựng markup này.
   Nút an toàn là nút chính (burgundy); nút hành động không hoàn tác viền đỏ.
   ======================================================================== */
.b-dialog-backdrop {
  position: fixed; inset: 0; z-index: 1000;
  display: grid; place-items: center; padding: 16px;
  background: rgba(17, 17, 17, 0.62);
}
.b-dialog {
  width: min(460px, 100%); max-height: calc(100vh - 32px); overflow-y: auto;
  padding: 22px 22px 20px; background: var(--paper); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 4px; box-shadow: 8px 8px 0 var(--bur);
  font-family: var(--font-body);
}
.b-dialog-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; margin-bottom: 10px; }
.b-dialog-title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 21px; line-height: 1.25; color: var(--ink); text-wrap: balance; overflow-wrap: anywhere; }
.b-dialog-x {
  flex: none; width: 32px; height: 32px; display: grid; place-items: center;
  border: 2px solid var(--ink); border-radius: 4px; background: var(--paper); color: var(--ink);
  font-size: 18px; line-height: 1; cursor: pointer;
}
.b-dialog-x:hover { background: var(--bur-wash); }
.b-dialog-lead { margin: 0 0 16px; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.b-dialog-warn {
  display: flex; align-items: center; gap: 14px; margin: 0 0 18px;
  padding: 12px 14px; border: 2px solid var(--ink); border-radius: 4px; background: var(--bur-wash);
}
.b-dialog-big { flex: none; font-family: var(--font-display); font-weight: 700; font-size: 24px; color: var(--bur); }
.b-dialog-warn-text { font-size: 14px; line-height: 1.5; color: var(--ink); }
.b-dialog-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.b-dialog-btn {
  min-height: 44px; padding: 0 16px; border: 2px solid var(--ink); border-radius: 4px;
  background: var(--paper); color: var(--ink); font: inherit; font-weight: 700; font-size: 14.5px; cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
}
.b-dialog-btn.is-danger { border-color: var(--danger); color: var(--danger); }
.b-dialog-btn.is-danger:hover { background: var(--danger); color: #fff; }
.b-dialog-btn.is-quiet:hover { background: var(--canvas); }
.b-dialog-btn.is-safe { background: var(--bur); color: #fff; box-shadow: var(--b-shadow-sm); }
@media (hover: hover) { .b-dialog-btn.is-safe:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); } }
.b-dialog-btn.is-safe:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
@media (max-width: 480px) {
  .b-dialog-actions { flex-direction: column-reverse; }
  .b-dialog-btn { width: 100%; }
}

/* Thẻ trạng thái: trang trống, lỗi tải (B16 · 04). */
.b-state {
  display: flex; flex-direction: column; align-items: flex-start; gap: 12px;
  padding: 28px 28px 26px; border: 2px dashed var(--ink); border-radius: 4px; background: var(--paper);
}
.b-state.is-error { border-style: solid; border-color: var(--danger); box-shadow: 4px 4px 0 var(--danger); }
.b-state-title { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 22px; color: var(--ink); }
.b-state-body { margin: 0; max-width: 56ch; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.b-state .btn.btn-primary { margin-top: 4px; }

/* Màn khởi động: nền giấy kẻ ô như mọi màn, vạch chạy burgundy trong khung 2px. */
.boot-screen {
  background-color: var(--canvas);
  background-image: linear-gradient(var(--line-b) 1px, transparent 1px), linear-gradient(90deg, var(--line-b) 1px, transparent 1px);
  background-size: 28px 28px;
}
.boot-name { font-weight: 700; font-size: 22px; color: var(--ink); }
.boot-als { font-weight: 700; color: var(--ink-2); }
.boot-track { height: 12px; padding: 2px; background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: 3px 3px 0 var(--ink); }
.boot-fill { background: var(--bur); border-radius: 2px; }
.boot-status { font-weight: 600; color: var(--ink-2); }
.exam-figures img { display: block; margin-left: auto; margin-right: auto; }

/* Lịch sử · khối Tài khoản (gộp từ /credits, 2026-10-04). */
.hist-account {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  margin: 0 0 24px; padding: 16px 20px;
  background: var(--paper); border: 2px solid var(--ink); border-radius: 4px; box-shadow: var(--b-shadow);
  scroll-margin-top: 24px;
}
.hist-account:target { box-shadow: 6px 6px 0 var(--bur); }
.hist-account-avatar {
  flex: none; width: 48px; height: 48px; display: grid; place-items: center;
  border-radius: 4px; background: var(--ink); color: #fff;
  font-family: var(--font-display); font-weight: 700; font-size: 20px;
}
.hist-account-grid { flex: 1 1 420px; min-width: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.hist-account-grid dt { font-family: var(--font-mono); font-weight: 700; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }
.hist-account-grid dd { margin: 4px 0 0; font-size: 15px; font-weight: 600; color: var(--ink); overflow-wrap: anywhere; }
.hist-account-credit { flex: none; font-size: 14.5px; }
.hist-account-credit::after { content: " →"; }
@media (max-width: 700px) {
  .hist-account { align-items: flex-start; gap: 14px; padding: 14px 16px; }
  .hist-account-grid { grid-template-columns: minmax(0, 1fr); gap: 10px; flex-basis: 200px; }
}