/*
 * studylab.css — Study Lab cream-neon design system
 * ALL selectors scoped under .sl-scope to avoid polluting the tailwind app shell.
 * CSS custom properties defined inside .sl-scope (not :root) to avoid collisions.
 * Exception: --rd-passage-fs / --rd-passage-lh set on documentElement by JS (scoped via .sl-scope p).
 */

/* =========================================================================
   Design tokens — scoped
   ========================================================================= */
.sl-scope {
  /* Cream + Neon — khớp theme-tokens.css (nguồn token canonical). */
  --sl-bg: #f5f1e8;
  --sl-surface: #fdfaf1;
  --sl-surface-2: #f9f4e6;
  --sl-sidebar-bg: #1a1a1f;
  --sl-sidebar-bg-2: #232328;
  --sl-sidebar-text: #e5e5e4;
  --sl-sidebar-muted: #71717a;
  --sl-accent: #c6dc4b;
  --sl-accent-hover: #b4c93a;
  --sl-accent-soft: #e7efc3;
  --sl-accent-on: #1a1a1f;
  --sl-dark-card: #1a1a1f;
  --sl-dark-card-2: #2d2d33;
  --sl-dark-text: #ffffff;
  --sl-text: #18181b;
  --sl-text-2: #52525b;
  --sl-muted: #a1a1aa;
  --sl-border: #e4e4e7;
  --sl-border-soft: #f1f0ee;
  --sl-success: #16a34a;
  --sl-success-soft: #dcfce7;
  --sl-danger: #dc2626;
  --sl-danger-soft: #fee2e2;
  --sl-warn: #d97706;
  --sl-warn-soft: #fef3c7;
  --sl-info: #2563eb;
  --sl-info-soft: #dbeafe;
  --sl-purple: #9333ea;
  --sl-purple-soft: #f3e8ff;
  --sl-shadow-sm: 0 1px 2px rgba(24, 24, 27, 0.04);
  --sl-shadow:
    0 2px 8px -2px rgba(24, 24, 27, 0.06), 0 1px 3px rgba(24, 24, 27, 0.04);
  --sl-shadow-md:
    0 8px 16px -4px rgba(24, 24, 27, 0.08), 0 2px 4px rgba(24, 24, 27, 0.04);
  --sl-shadow-lg:
    0 16px 32px -8px rgba(24, 24, 27, 0.12), 0 4px 8px rgba(24, 24, 27, 0.06);
  --sl-r-sm: 8px;
  --sl-r: 14px;
  --sl-r-lg: 20px;
  --sl-r-xl: 28px;
  --sl-topbar-h: 60px;
  --sl-stage-w: clamp(1280px, 94vw, 1920px);
  --sl-practice-stage-w: clamp(760px, 56vw, 1080px);
  --shell-sidebar-w: 278px;
  --sl-font-jp:
    "Noto Serif JP", "Hiragino Mincho ProN", "YuMincho", "MS Mincho", serif;

  /* Font sizing for passage text — overridden by JS on documentElement but consumed here */
  --rd-passage-fs: 19px;
  --rd-passage-lh: 1.95;

  box-sizing: border-box;
  /* Container-query context: mọi breakpoint layout đo theo bề rộng CỘT NỘI DUNG
     (cửa sổ trừ sidebar toàn cục), không đo theo cửa sổ — sửa lỗi bóp cột khi sidebar mở. */
  container: appcol / inline-size;
  /* "Noto Serif JP" sau Inter: chữ Nhật ở nhãn UI (tab 短文/中文…) cùng font với passage. */
  font-family:
    "Inter",
    "Noto Serif JP",
    -apple-system,
    system-ui,
    sans-serif;
  background: var(--sl-bg);
  color: var(--sl-text);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.sl-scope *,
.sl-scope *::before,
.sl-scope *::after {
  box-sizing: border-box;
}

.sl-scope ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.sl-scope ::-webkit-scrollbar-thumb {
  background: var(--sl-border);
  border-radius: 4px;
}
.sl-scope ::-webkit-scrollbar-thumb:hover {
  background: var(--sl-muted);
}

/* ---- Typography ---- */
.sl-scope .jp {
  font-family: var(--sl-font-jp);
  font-weight: 500;
}
.sl-scope h1,
.sl-scope h2,
.sl-scope h3,
.sl-scope h4 {
  letter-spacing: -0.015em;
}
.sl-scope code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-soft);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12.5px;
}

/* ---- Layout shell (nhúng trong app shell toàn cục — không còn sidebar nội bộ) ---- */
.sl-scope .sl-layout {
  display: flex;
  min-height: 100%;
  width: 100%;
}

.sl-scope .sl-main {
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: 100%;
}

.sl-scope .sl-topbar {
  height: var(--sl-topbar-h);
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--sl-bg);
  border-bottom: 1px solid var(--sl-border-soft);
  position: sticky;
  top: 0;
  z-index: 5;
}
@container appcol (max-width: 860px) {
  .sl-scope .sl-topbar {
    height: auto;
    min-height: var(--sl-topbar-h);
    padding: 8px 14px;
  }
  .sl-scope .topbar-info {
    display: none;
  }
}
.sl-scope.full-test-section .sl-topbar {
  position: static;
}
/* Đọc hiểu: exam-bar cũng sticky top:0 — topbar phải nhường (static), nếu không
   hai thanh cùng ghim đỉnh và đè lên nhau khi cuộn trong bài. */
.sl-scope.rd-reading-mode .sl-topbar {
  position: static;
}
.sl-scope.full-test-section .exam-bar {
  position: relative;
}
.sl-scope.full-test-section {
  --ft-stage-w: var(--sl-stage-w);
}
.sl-scope.full-test-section #sl-rdSessQnavSlot {
  position: sticky;
  top: 0;
  z-index: 20;
}
.sl-scope.full-test-section .ft-qnav-sticky {
  position: relative;
  top: auto;
}

/* ---- Khung nội dung Study Lab: TRỤC CĂN GIỮA DUY NHẤT ----
   Tên class PHẢI là sl-container, KHÔNG phải "container" — Tailwind CDN của app
   mẹ định nghĩa .container (max-width theo breakpoint, không căn giữa) sẽ chụp
   vào và nêm toàn bộ nội dung sang trái trên màn rộng.
   Nguyên tắc: CHỈ khung này quyết định bề rộng + căn giữa; các màn con bên trong
   dùng width:100%, không tự đặt stage width nữa. */
.sl-scope .sl-container {
  width: 100%;
  max-width: 1680px;
  margin-inline: auto;
  flex: 1;
}

/* ---- Sidebar elements (da xoa — sidebar noi bo Study Lab khong con) ---- */

#app-shell.is-sidebar-hidden .sl-scope .content-focus,
#app-shell.is-sidebar-hidden .sl-scope .ft-library {
  transform: none;
}

/* ---- Buttons ---- */
.sl-scope .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: 10px;
  border: 0;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}
.sl-scope .btn:active {
  transform: scale(0.96);
}
.sl-scope .btn.primary {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  box-shadow: 0 2px 6px rgba(24, 24, 27, 0.1);
}
.sl-scope .btn.primary:hover {
  background: var(--sl-accent-hover);
  box-shadow: 0 4px 10px rgba(24, 24, 27, 0.16);
  transform: translateY(-1px);
}
.sl-scope .btn.ghost {
  background: var(--sl-surface);
  color: var(--sl-text-2);
  border: 1px solid var(--sl-border);
  box-shadow: var(--sl-shadow-sm);
}
.sl-scope .btn.ghost:hover {
  background: var(--sl-surface-2);
  color: var(--sl-text);
  border-color: var(--sl-muted);
}
.sl-scope .btn.timer-start {
  background: linear-gradient(135deg, #f97316 0%, #ec4899 100%);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow:
    0 7px 18px rgba(236, 72, 153, 0.26),
    0 3px 8px rgba(249, 115, 22, 0.18);
}
.sl-scope .btn.timer-start:hover {
  filter: brightness(1.04);
  box-shadow:
    0 10px 24px rgba(236, 72, 153, 0.32),
    0 4px 10px rgba(249, 115, 22, 0.22);
  transform: translateY(-1px);
}
.sl-scope .btn.dark {
  background: var(--sl-dark-card);
  color: #fff;
}
.sl-scope .btn.dark:hover {
  background: var(--sl-dark-card-2);
}
.sl-scope .btn.sm {
  padding: 5px 11px;
  font-size: 12.5px;
}
.sl-scope .btn.lg {
  padding: 11px 20px;
  font-size: 15px;
}
.sl-scope .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---- Chips / badges ---- */
.sl-scope .chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-soft);
  color: var(--sl-text-2);
}
.sl-scope .chip.success {
  background: var(--sl-success-soft);
  color: var(--sl-success);
  border-color: transparent;
}
.sl-scope .chip.danger {
  background: var(--sl-danger-soft);
  color: var(--sl-danger);
  border-color: transparent;
}
.sl-scope .chip.warn {
  background: var(--sl-warn-soft);
  color: var(--sl-warn);
  border-color: transparent;
}
.sl-scope .chip.info {
  background: var(--sl-info-soft);
  color: var(--sl-info);
  border-color: transparent;
}
.sl-scope .chip.purple {
  background: var(--sl-purple-soft);
  color: var(--sl-purple);
  border-color: transparent;
}
.sl-scope .chip.accent {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  border-color: transparent;
}

/* ---- Mode toggle (segmented control) ---- */
.sl-scope .mode-toggle {
  display: inline-flex;
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border);
  border-radius: 10px;
  padding: 3px;
  gap: 2px;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.sl-scope .mode-toggle::-webkit-scrollbar {
  display: none;
}
.sl-scope .mode-toggle button {
  padding: 6px 16px;
  border-radius: 8px;
  border: 0;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  background: transparent;
  color: var(--sl-text-2);
  transition: all 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}
.sl-scope .mode-toggle button.active {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
}

/* ---- Filter bar ---- */
.sl-scope .filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 0 16px;
}
.sl-scope .filter-bar select,
.sl-scope .filter-bar input {
  padding: 7px 11px;
  border: 1px solid var(--sl-border);
  border-radius: var(--sl-r-sm);
  font-size: 13px;
  font-family: inherit;
  background: var(--sl-surface);
  color: var(--sl-text);
}
.sl-scope .filter-bar select:focus,
.sl-scope .filter-bar input:focus {
  outline: 2px solid var(--sl-accent);
  outline-offset: 1px;
}
.sl-scope .filter-label {
  font-size: 13px;
  color: var(--sl-text-2);
  font-weight: 500;
}
.sl-scope .filter-bar .spacer {
  flex: 1;
}

/* ---- Progress bar ---- */
.sl-scope .progress-bar-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.sl-scope .progress-bar {
  flex: 1;
  height: 6px;
  background: var(--sl-border);
  border-radius: 3px;
  overflow: hidden;
}
.sl-scope .progress-bar-fill {
  height: 100%;
  background: var(--sl-accent);
  transition: width 0.3s ease;
}
.sl-scope .progress-label {
  font-size: 12.5px;
  color: var(--sl-text-2);
  font-weight: 600;
  white-space: nowrap;
}

/* ---- Score chip ---- */
.sl-scope .score-chip {
  background: var(--sl-dark-card);
  color: #fff;
  padding: 6px 14px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
}
.sl-scope .score-chip b {
  color: var(--sl-accent);
}

/* ---- Item list (sidebar-style list) ---- */
.sl-scope .item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.sl-scope .item-list li {
  padding: 10px 13px;
  border-radius: var(--sl-r-sm);
  cursor: pointer;
  font-size: 13.5px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border: 1px solid transparent;
  transition: background 0.1s;
}
.sl-scope .item-list li:hover {
  background: var(--sl-surface-2);
}
.sl-scope .item-list li.active {
  background: var(--sl-accent-soft);
  border-color: var(--sl-accent);
}
.sl-scope .item-list .it-title {
  font-weight: 600;
  color: var(--sl-text);
}
.sl-scope .item-list .it-meta {
  font-size: 11.5px;
  color: var(--sl-muted);
}

/* ---- Section group header ---- */
.sl-scope .group-hdr {
  font-size: 13px;
  font-weight: 700;
  color: var(--sl-text-2);
  letter-spacing: 0.08em;
  margin: 18px 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sl-scope .group-hdr .cnt {
  background: var(--sl-surface-2);
  color: var(--sl-muted);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 999px;
  font-weight: 500;
}

/* ---- Grammar question card ---- */
.sl-scope .gr-card {
  background: var(--sl-surface);
  border-radius: var(--sl-r-lg);
  padding: 24px 28px;
  box-shadow: var(--sl-shadow-sm);
  width: 100%;
  max-width: none;
  margin-bottom: 16px;
  border: 1px solid var(--sl-border-soft);
}
.sl-scope .gr-card-hdr {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.sl-scope .q-badge {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  font-weight: 700;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 8px;
}
.sl-scope .session-badge {
  background: var(--sl-dark-card);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 7px;
}
.sl-scope .confidence-badge {
  background: var(--sl-success-soft);
  color: var(--sl-success);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
}

/* ---- Sentence / blank display ---- */
.sl-scope .gr-sentence {
  font-family: var(--sl-font-jp);
  font-size: 20px;
  line-height: 2.2;
  padding: 18px 22px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r);
  border-left: 4px solid var(--sl-accent);
  margin-bottom: 18px;
}
.sl-scope .gr-blank {
  display: inline-block;
  min-width: 80px;
  border-bottom: 2.5px solid var(--sl-accent);
  background: var(--sl-accent-soft);
  padding: 0 8px;
  border-radius: 4px 4px 0 0;
  text-align: center;
  font-weight: 700;
  color: var(--sl-accent-on);
}
.sl-scope .gr-card-sentence-grammar .gr-blank {
  background: var(--sl-surface-2);
  border-bottom-color: var(--sl-text-2);
  color: var(--sl-text);
  box-shadow: inset 0 0 0 1px rgba(24, 24, 27, 0.12);
}
.sl-scope .gr-star {
  display: inline-block;
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  padding: 0 6px;
  border-radius: 4px;
  font-weight: 800;
}

/* ---- Grammar choices ---- */
.sl-scope .gr-choices {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.sl-scope .gr-choices li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 14px;
  border: 1px solid var(--sl-border-soft);
  border-radius: var(--sl-r);
  background: var(--sl-surface);
  cursor: pointer;
  transition: all 0.13s;
}
.sl-scope .gr-choices li:hover:not(.locked) {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .gr-choices li.selected {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .gr-choices li.correct {
  border-color: var(--sl-success);
  background: var(--sl-success-soft);
  cursor: default;
}
.sl-scope .gr-choices li.wrong-pick {
  border-color: var(--sl-danger);
  background: var(--sl-danger-soft);
  cursor: default;
}
.sl-scope .gr-choices li.locked {
  cursor: default;
}
.sl-scope .gr-choices li.locked:not(.correct):not(.wrong-pick):hover {
  border-color: var(--sl-border-soft);
  background: var(--sl-surface);
}
.sl-scope .gr-choice-num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--sl-surface-2);
  border-radius: 50%;
  font-weight: 700;
  font-size: 13px;
  color: var(--sl-text-2);
}
.sl-scope .gr-choices li.selected .gr-choice-num {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .gr-choices li.correct .gr-choice-num {
  background: var(--sl-success);
  color: #fff;
}
.sl-scope .gr-choices li.wrong-pick .gr-choice-num {
  background: var(--sl-danger);
  color: #fff;
}
.sl-scope .gr-choice-body {
  flex: 1;
}
.sl-scope .gr-choice-form {
  font-family: var(--sl-font-jp);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
}
.sl-scope .gr-choice-meaning {
  font-size: 13px;
  color: var(--sl-text-2);
  margin-top: 2px;
  /* hidden in practice mode before submit; shown only when locked */
  display: none;
}
.sl-scope .locked .gr-choice-meaning {
  display: block;
}
.sl-scope .gr-choice-note {
  font-size: 12.5px;
  color: var(--sl-muted);
  margin-top: 4px;
  display: none;
}
.sl-scope .locked .gr-choice-note {
  display: block;
}

/* ---- Answer reveal ---- */
.sl-scope .gr-answer-reveal {
  background: var(--sl-accent-soft);
  border: 1.5px solid var(--sl-accent);
  border-radius: var(--sl-r);
  padding: 14px 18px;
  margin-bottom: 14px;
  display: none;
}
.sl-scope .gr-answer-reveal.show {
  display: block;
}
.sl-scope .gr-answer-reveal .ar-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--sl-text-2);
  margin-bottom: 6px;
}
.sl-scope .gr-answer-reveal .ar-text {
  font-size: 14px;
  line-height: 1.65;
}

.sl-scope .gr-translation {
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  padding: 12px 16px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--sl-text);
  font-family: "Noto Serif", serif;
  margin-bottom: 14px;
  display: none;
}
.sl-scope .gr-translation.show {
  display: block;
}

/* ---- m6 assembled sentence ---- */
.sl-scope .gr-assembled {
  font-family: var(--sl-font-jp);
  font-size: 17px;
  line-height: 2;
  padding: 14px 18px;
  background: var(--sl-dark-card);
  color: var(--sl-dark-text);
  border-radius: var(--sl-r);
  margin-bottom: 12px;
  display: none;
}
.sl-scope .gr-assembled.show {
  display: block;
}
.sl-scope .gr-assembled .star-hl {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  padding: 1px 4px;
  border-radius: 4px;
  font-weight: 700;
}
.sl-scope .gr-assembled-vn {
  font-size: 13px;
  color: var(--sl-text-2);
  font-family: "Noto Serif", serif;
  padding-left: 4px;
  margin-bottom: 12px;
  display: none;
}
.sl-scope .gr-assembled-vn.show {
  display: block;
}

/* ---- m7 context display ---- */
.sl-scope .gr-context {
  margin-bottom: 18px;
}
.sl-scope .gr-ctx-before,
.sl-scope .gr-ctx-after {
  font-family: var(--sl-font-jp);
  font-size: 17px;
  line-height: 2;
  padding: 10px 16px;
  color: var(--sl-text);
}
.sl-scope .gr-ctx-blank-line {
  font-family: var(--sl-font-jp);
  font-size: 17px;
  line-height: 2;
  padding: 10px 16px;
  background: var(--sl-info-soft);
  border-left: 4px solid var(--sl-info);
  border-radius: 0 var(--sl-r-sm) var(--sl-r-sm) 0;
  margin: 4px 0;
}
.sl-scope .blank-marker {
  display: inline-block;
  min-width: 90px;
  border-bottom: 2px solid var(--sl-info);
  background: rgba(37, 99, 235, 0.08);
  padding: 0 6px;
  border-radius: 3px 3px 0 0;
  text-align: center;
  font-weight: 700;
  color: var(--sl-info);
  font-family: var(--sl-font-jp);
}

/* ---- m6 fragments ---- */
.sl-scope .fragment-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}
.sl-scope .fragment-btn {
  padding: 12px 14px;
  border: 1.5px solid var(--sl-border);
  border-radius: var(--sl-r);
  background: var(--sl-surface);
  font-family: var(--sl-font-jp);
  font-size: 15.5px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: all 0.13s;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sl-scope .fragment-btn:hover:not(.locked) {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .fragment-btn.selected {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .fragment-btn.correct {
  border-color: var(--sl-success);
  background: var(--sl-success-soft);
}
.sl-scope .fragment-btn.wrong-pick {
  border-color: var(--sl-danger);
  background: var(--sl-danger-soft);
}
.sl-scope .fragment-btn.locked {
  cursor: default;
}
.sl-scope .fragment-btn .fn {
  font-size: 12px;
  font-weight: 700;
  color: var(--sl-muted);
  flex-shrink: 0;
}
.sl-scope .fragment-btn .ft {
  font-family: var(--sl-font-jp);
  font-size: 15px;
}

/* ---- Reasoning steps ---- */
.sl-scope .reasoning-steps {
  display: none;
  margin-top: 10px;
}
.sl-scope .reasoning-steps.show {
  display: block;
}
.sl-scope .reasoning-steps ol {
  margin: 0;
  padding-left: 22px;
}
.sl-scope .reasoning-steps ol li {
  font-size: 13.5px;
  line-height: 1.65;
  margin-bottom: 6px;
  color: var(--sl-text-2);
}

/* ---- Reading section ---- */
.sl-scope .reading-layout {
  display: grid;
  grid-template-columns: 55% 45%;
  gap: 20px;
  align-items: start;
}
.sl-scope .passage-panel {
  background: var(--sl-surface);
  border-radius: var(--sl-r-lg);
  padding: 28px 36px;
  box-shadow: var(--sl-shadow);
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
}
.sl-scope .passage-panel h4 {
  margin: 0 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--sl-muted);
}
.sl-scope .passage-text {
  font-family: var(--sl-font-jp);
  font-size: 19px;
  line-height: 1.95;
  color: var(--sl-text);
}
.sl-scope .passage-sentence {
  display: block;
  cursor: pointer;
  padding: 3px 6px;
  margin: 1px -6px;
  border-radius: 5px;
  transition: background 0.1s;
}
.sl-scope .passage-sentence:hover {
  background: var(--sl-accent-soft);
}
.sl-scope .passage-sentence.highlighted {
  background: var(--sl-accent-soft);
}

.sl-scope .passage-vn-map {
  margin-top: 18px;
  border-top: 1px solid var(--sl-border-soft);
  padding-top: 14px;
}
.sl-scope .vn-row {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid var(--sl-border-soft);
  font-size: 13px;
}
.sl-scope .vn-num {
  flex-shrink: 0;
  color: var(--sl-muted);
  font-weight: 700;
  font-size: 11px;
  padding-top: 2px;
}
.sl-scope .vn-text {
  color: var(--sl-text-2);
  font-family: "Noto Serif", serif;
  line-height: 1.6;
  flex: 1;
}
.sl-scope .vn-func {
  font-size: 11px;
  color: var(--sl-info);
  font-weight: 500;
}

.sl-scope .passage-meta {
  margin-top: 16px;
  padding: 12px 14px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  font-size: 12.5px;
}
.sl-scope .passage-meta .kv {
  display: flex;
  gap: 6px;
  align-items: baseline;
  margin-bottom: 4px;
}
.sl-scope .passage-meta .kv label {
  color: var(--sl-muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  flex-shrink: 0;
}
.sl-scope .passage-meta .kv span {
  color: var(--sl-text-2);
}

.sl-scope .notable-section {
  margin-top: 14px;
}
.sl-scope .notable-section h5 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--sl-muted);
  font-weight: 700;
  margin: 0 0 6px;
}
.sl-scope .notable-tag {
  display: inline-block;
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-soft);
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--sl-text-2);
  margin: 2px;
}
.sl-scope .notable-tag.jp {
  font-family: var(--sl-font-jp);
  font-size: 13px;
}

/* ---- Q&A panel ---- */
.sl-scope .qa-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.sl-scope .qa-card {
  background: var(--sl-surface);
  border-radius: var(--sl-r-lg);
  padding: 22px 26px;
  box-shadow: var(--sl-shadow);
  scroll-margin-top: 90px;
}
.sl-scope .qa-q-hdr {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.sl-scope .qa-q-text {
  font-family: var(--sl-font-jp);
  font-size: 16.5px;
  line-height: 1.85;
  padding: 12px 15px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  border-left: 3px solid var(--sl-accent);
  margin-bottom: 8px;
}
.sl-scope .qa-q-vn {
  font-size: 13px;
  color: var(--sl-text-2);
  margin-bottom: 14px;
  padding-left: 12px;
  font-family: "Noto Serif", serif;
}
.sl-scope .qa-options {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.sl-scope .qa-options li {
  padding: 12px 15px;
  border: 1.5px solid var(--sl-border);
  border-radius: var(--sl-r);
  background: var(--sl-surface);
  display: flex;
  gap: 10px;
  align-items: flex-start;
  cursor: pointer;
  transition: all 0.13s;
}
.sl-scope .qa-options li:hover:not(.locked) {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .qa-options li.selected {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .qa-options li.correct {
  border-color: var(--sl-success);
  background: var(--sl-success-soft);
}
.sl-scope .qa-options li.wrong-pick {
  border-color: var(--sl-danger);
  background: var(--sl-danger-soft);
}
.sl-scope .qa-options li.locked {
  cursor: default;
}
.sl-scope .qa-options li.locked:not(.correct):not(.wrong-pick):hover {
  border-color: var(--sl-border);
  background: var(--sl-surface);
}
.sl-scope .qa-opt-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--sl-surface-2);
  border-radius: 50%;
  font-weight: 700;
  font-size: 12.5px;
  color: var(--sl-text-2);
}
.sl-scope .qa-options li.selected .qa-opt-num {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .qa-options li.correct .qa-opt-num {
  background: var(--sl-success);
  color: #fff;
}
.sl-scope .qa-options li.wrong-pick .qa-opt-num {
  background: var(--sl-danger);
  color: #fff;
}
.sl-scope .qa-opt-body {
  flex: 1;
}
.sl-scope .qa-opt-jp {
  font-family: var(--sl-font-jp);
  font-size: 15px;
  line-height: 1.75;
}
.sl-scope .qa-opt-vn {
  font-size: 12.5px;
  color: var(--sl-text-2);
  font-family: "Noto Serif", serif;
  margin-top: 3px;
  display: none;
}
.sl-scope .locked .qa-opt-vn {
  display: block;
}
.sl-scope .qa-opt-reason {
  font-size: 12.5px;
  color: var(--sl-text-2);
  margin-top: 5px;
  display: none;
  line-height: 1.55;
}
.sl-scope .locked .qa-opt-reason {
  display: block;
}
.sl-scope .qa-trap-badge {
  display: inline-block;
  margin-top: 4px;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--sl-danger-soft);
  color: var(--sl-danger);
}
.sl-scope .qa-opt-technique {
  display: inline-block;
  margin-top: 3px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--sl-success-soft);
  color: var(--sl-success);
}

.sl-scope .what-asked {
  padding: 10px 13px;
  background: var(--sl-info-soft);
  border-radius: var(--sl-r-sm);
  font-size: 13px;
  color: var(--sl-text-2);
  margin-bottom: 10px;
  display: none;
}
.sl-scope .what-asked.show {
  display: block;
}
.sl-scope .answer-loc {
  padding: 10px 13px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  font-size: 13px;
  margin-bottom: 10px;
  display: none;
}
.sl-scope .answer-loc.show {
  display: block;
}
.sl-scope .answer-loc .al-where {
  font-size: 11.5px;
  color: var(--sl-muted);
  margin-bottom: 4px;
}
.sl-scope .answer-loc .al-jp {
  font-family: var(--sl-font-jp);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 3px;
}
.sl-scope .answer-loc .al-vn {
  font-size: 12.5px;
  color: var(--sl-text-2);
  font-family: "Noto Serif", serif;
}

/* ---- Progress bar above question card ---- */
.sl-scope .gr-progress-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.sl-scope .gr-prev-next {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---- Collapsible question-grid navigator ---- */
.sl-scope .gr-nav-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--sl-r);
  border: 1px solid var(--sl-border);
  background: var(--sl-surface);
  font-size: 13px;
  font-weight: 600;
  color: var(--sl-text-2);
  cursor: pointer;
  font-family: inherit;
  margin-top: 16px;
  width: 100%;
  text-align: left;
  transition: background 0.12s;
}
.sl-scope .gr-nav-toggle:hover {
  background: var(--sl-surface-2);
}
.sl-scope .gr-nav-toggle .toggle-arrow {
  margin-left: auto;
  transition: transform 0.2s;
}
.sl-scope .gr-nav-toggle.open .toggle-arrow {
  transform: rotate(180deg);
}
.sl-scope .gr-nav-body {
  display: none;
  padding: 12px 0 4px;
}
.sl-scope .gr-nav-body.open {
  display: block;
}

/* ---- Nav bar within a set ---- */
.sl-scope .set-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0 16px;
  flex-wrap: wrap;
}
.sl-scope .nav-chips {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  flex: 1;
}
.sl-scope .nav-chip {
  padding: 6px 12px;
  border: 1.5px solid var(--sl-border);
  border-radius: 9px;
  background: var(--sl-surface);
  font-weight: 600;
  font-size: 13px;
  color: var(--sl-text-2);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.13s;
}
.sl-scope .nav-chip:hover {
  background: var(--sl-accent-soft);
  border-color: var(--sl-accent);
}
.sl-scope .nav-chip.answered {
  background: var(--sl-success-soft);
  border-color: var(--sl-success);
  color: var(--sl-success);
}
.sl-scope .nav-chip.wrong {
  background: var(--sl-danger-soft);
  border-color: var(--sl-danger);
  color: var(--sl-danger);
}
.sl-scope .nav-chip.current {
  background: var(--sl-accent);
  border-color: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .nav-chip.answered.current,
.sl-scope .nav-chip.wrong.current {
  background: var(--sl-accent);
  border-color: var(--sl-accent);
  color: var(--sl-accent-on);
}

/* ---- Empty / loading ---- */
.sl-scope .empty-hero {
  margin: 40px auto;
  max-width: 560px;
  background: var(--sl-surface);
  padding: 50px 44px;
  border-radius: var(--sl-r-xl);
  text-align: center;
  box-shadow: var(--sl-shadow);
  position: relative;
  overflow: hidden;
}
.sl-scope .empty-hero::after {
  content: "";
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--sl-accent) 0%, transparent 65%);
  right: -50px;
  top: -50px;
  opacity: 0.3;
  pointer-events: none;
}
.sl-scope .empty-hero .hero-icon {
  display: inline-flex;
  width: 60px;
  height: 60px;
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  border-radius: 16px;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.sl-scope .empty-hero h2 {
  font-size: 24px;
  margin: 16px 0 8px;
  font-weight: 700;
}
.sl-scope .empty-hero p {
  color: var(--sl-text-2);
  margin: 6px 0 16px;
}
.sl-scope .empty-hero .hint {
  font-size: 12px;
  color: var(--sl-muted);
  margin-top: 20px;
}

.sl-scope .loading-msg {
  padding: 60px 24px;
  text-align: center;
  color: var(--sl-muted);
  font-size: 14px;
}

/* ---- Summary card ---- */
.sl-scope .summary-wrap {
  max-width: 720px;
  margin: 24px auto;
}
.sl-scope .summary-hero {
  background: var(--sl-dark-card);
  color: #fff;
  border-radius: var(--sl-r-xl);
  padding: 36px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.sl-scope .summary-hero::after {
  content: "✦";
  position: absolute;
  top: 16px;
  right: 20px;
  color: var(--sl-accent);
  font-size: 20px;
}
.sl-scope .summary-score {
  font-size: 52px;
  font-weight: 800;
  color: var(--sl-accent);
  line-height: 1;
}
.sl-scope .summary-score small {
  font-size: 22px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 700;
}
.sl-scope .summary-label {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 8px;
}
.sl-scope .summary-stats {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
  flex-wrap: wrap;
}
.sl-scope .summary-stat {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 9px 16px;
  font-size: 13.5px;
  font-weight: 600;
}

/* ---- Reading list items ---- */
.sl-scope .reading-item {
  padding: 9px 12px;
  border-radius: var(--sl-r-sm);
  cursor: pointer;
  border: 1px solid var(--sl-border-soft);
  background: var(--sl-surface);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.13s;
}
.sl-scope .reading-item:hover {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .reading-item.active {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .ri-type-badge {
  flex-shrink: 0;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 700;
}
.sl-scope .ri-tanbun {
  background: var(--sl-info-soft);
  color: var(--sl-info);
}
.sl-scope .ri-chuubun {
  background: var(--sl-warn-soft);
  color: var(--sl-warn);
}
.sl-scope .ri-choubun {
  background: var(--sl-purple-soft);
  color: var(--sl-purple);
}
.sl-scope .ri-tougou {
  background: var(--sl-danger-soft);
  color: var(--sl-danger);
}
.sl-scope .ri-body {
  flex: 1;
  min-width: 0;
}
.sl-scope .ri-title {
  font-weight: 600;
  font-size: 13px;
  color: var(--sl-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sl-scope .ri-meta {
  font-size: 11px;
  color: var(--sl-muted);
  margin-top: 1px;
}

/* ---- Topbar info ---- */
.sl-scope .topbar-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sl-scope .topbar-info .sep {
  color: var(--sl-muted);
}

/* ---- Feedback callout ---- */
.sl-scope .feedback-callout {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--sl-r);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 12px;
}
.sl-scope .feedback-callout.correct {
  background: var(--sl-success-soft);
  color: var(--sl-success);
}
.sl-scope .feedback-callout.wrong {
  background: var(--sl-danger-soft);
  color: var(--sl-danger);
}

/* ---- Passage group label (mondai sub-header in list) ---- */
.sl-scope .mondai-label {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--sl-text-2);
  letter-spacing: 0.07em;
  margin: 14px 0 6px 2px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.sl-scope .mondai-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--sl-border-soft);
}

/* ---- Session group collapsible (Tất cả kỳ) ---- */
.sl-scope .session-group-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--sl-r-sm);
  background: var(--sl-surface-2);
  border: 1px solid var(--sl-border-soft);
  cursor: pointer;
  margin: 18px 0 0;
  width: 100%;
  font-family: inherit;
  text-align: left;
  transition: background 0.12s;
}
.sl-scope .session-group-toggle:hover {
  background: var(--sl-accent-soft);
}
.sl-scope .session-group-toggle .sgt-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--sl-text);
  flex: 1;
}
.sl-scope .session-group-toggle .sgt-cnt {
  font-size: 11px;
  color: var(--sl-muted);
}
.sl-scope .session-group-toggle .sgt-arrow {
  font-size: 10px;
  color: var(--sl-muted);
  transition: transform 0.2s;
}
.sl-scope .session-group-toggle.open .sgt-arrow {
  transform: rotate(180deg);
}
.sl-scope .session-group-body {
  margin-bottom: 4px;
}
.sl-scope .session-group-body.hidden {
  display: none;
}

/* =========================================================================
   EXAM MODE (ported from viewer.html)
   ========================================================================= */
.sl-scope .exam-bar {
  position: sticky;
  top: 0;
  background: var(--sl-bg);
  padding: 10px 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--sl-border-soft);
  margin-bottom: 16px;
  width: 100%;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
}
.sl-scope .exam-badge {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  padding: 5px 13px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 13px;
}
.sl-scope .exam-meta {
  font-size: 13px;
  color: var(--sl-text-2);
}
.sl-scope .timer {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--sl-surface);
  border: 1.5px solid var(--sl-border);
  padding: 7px 15px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
  color: var(--sl-text);
}
.sl-scope .timer.warning {
  border-color: var(--sl-danger);
  color: var(--sl-danger);
  background: var(--sl-danger-soft);
  animation: timer-pulse 1s infinite;
}
.sl-scope .timer.expired {
  border-color: var(--sl-danger);
  background: var(--sl-danger);
  color: #fff;
}
@keyframes timer-pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.04);
  }
}

.sl-scope .qnav {
  background: var(--sl-surface);
  border-radius: var(--sl-r);
  padding: 10px 14px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  box-shadow: var(--sl-shadow-sm);
}
.sl-scope .qnav-status {
  font-size: 13px;
  color: var(--sl-text-2);
}
.sl-scope .qnav-status b {
  color: var(--sl-text);
}
.sl-scope .test-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
}
.sl-scope .test-progress-track {
  display: block;
  width: 150px;
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--sl-border-soft);
}
.sl-scope .test-progress-track i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--sl-accent);
  transition: width 0.2s ease;
}
.sl-scope .gr-sticky-progress {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 250px;
}
.sl-scope .gr-sticky-progress .test-progress-track {
  width: 120px;
}
.sl-scope .test-completion-summary {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  margin: -5px 0 14px;
  padding: 10px 13px;
  border: 1px solid var(--sl-border-soft);
  border-radius: 12px;
  background: var(--sl-surface);
  color: var(--sl-text-2);
  font-size: 12.5px;
}
.sl-scope .test-completion-summary b {
  color: var(--sl-text);
}
.sl-scope .completion-doing,
.sl-scope .completion-current,
.sl-scope .session-state {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  white-space: nowrap;
}
.sl-scope .completion-doing,
.sl-scope .completion-current.doing,
.sl-scope .session-state.doing {
  color: var(--sl-warn);
  background: var(--sl-warn-soft);
}
.sl-scope .completion-current.done,
.sl-scope .session-state.done {
  color: var(--sl-success);
  background: var(--sl-success-soft);
}
.sl-scope .completion-current.todo,
.sl-scope .session-state.todo {
  color: var(--sl-muted);
  background: var(--sl-surface-2);
}
.sl-scope .gr-session-hdr .session-state {
  margin-left: auto;
}
.sl-scope .qnav-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.sl-scope .qnav-chip {
  padding: 6px 12px;
  border: 1.5px solid var(--sl-border);
  background: var(--sl-surface);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  color: var(--sl-text-2);
  font-family: inherit;
  transition: all 0.15s;
}
.sl-scope .qnav-chip:hover {
  background: var(--sl-accent-soft);
  border-color: var(--sl-accent);
}
.sl-scope .qnav-chip.picked {
  background: var(--sl-accent-soft);
  border-color: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .qnav-chip.answered {
  background: var(--sl-success-soft);
  border-color: var(--sl-success);
  color: var(--sl-success);
}
.sl-scope .qnav-chip.current {
  background: var(--sl-accent);
  border-color: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .ft-qnav-sticky {
  position: sticky;
  top: 66px;
  z-index: 4;
  display: block;
  padding: 7px 10px;
  margin: 8px 0 12px;
  border-color: var(--sl-border);
  box-shadow: 0 6px 18px rgba(24, 24, 27, 0.09);
  backdrop-filter: blur(12px);
  background: rgba(253, 250, 241, 0.94);
}
.sl-scope .ft-qnav-head {
  min-height: 30px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sl-scope .ft-qnav-progress {
  flex: 1;
  max-width: 180px;
  height: 5px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--sl-border-soft);
}
.sl-scope .ft-qnav-progress i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--sl-accent);
  transition: width 0.2s ease;
}
.sl-scope .ft-qnav-timer {
  flex-shrink: 0;
  padding: 4px 9px;
  border-radius: 8px;
  font-size: 13px;
  background: var(--sl-surface-2);
}
.sl-scope .ft-qnav-toggle {
  margin-left: auto;
  padding: 4px 8px;
  border: 0;
  border-radius: 7px;
  background: var(--sl-surface-2);
  color: var(--sl-text-2);
  font: 600 11px/1.4 inherit;
  cursor: pointer;
}
.sl-scope .ft-qnav-toggle:hover {
  background: var(--sl-accent-soft);
  color: var(--sl-accent-hover);
}
.sl-scope .ft-qnav-chips {
  max-height: 116px;
  overflow-y: auto;
  padding-top: 7px;
  border-top: 1px solid var(--sl-border-soft);
  margin-top: 6px;
}
.sl-scope .ft-qnav-sticky.is-collapsed .ft-qnav-chips {
  display: none;
}

@container appcol (max-width: 560px) {
  .sl-scope .ft-qnav-head {
    gap: 7px;
  }
  .sl-scope .ft-qnav-progress {
    max-width: 70px;
  }
  .sl-scope .ft-qnav-toggle {
    font-size: 0;
  }
  .sl-scope .ft-qnav-toggle span {
    font-size: 13px;
  }
  .sl-scope .test-progress {
    width: 100%;
    min-width: 0;
  }
  .sl-scope .test-progress-track {
    flex: 1;
    width: auto;
  }
}

.sl-scope .exam-split {
  display: grid;
  grid-template-columns: minmax(0, 62fr) minmax(390px, 38fr);
  gap: 20px;
  align-items: start;
  width: 100%;
  max-width: none;
  margin: 0 auto;
}
.sl-scope .exam-split > .exam-passage:not(.gr-m7-passage) {
  width: 100%;
}
.sl-scope .exam-passage,
.sl-scope .exam-question { width: 100%;
  background: var(--sl-surface);
  border-radius: var(--sl-r-lg);
  padding: 28px 36px;
  box-shadow: var(--sl-shadow-sm);
  border: 1px solid var(--sl-border-soft);
  max-height: calc(100vh - 180px);
  overflow-y: auto;
  position: sticky;
  top: 120px;
}
.sl-scope .exam-passage h4 {
  margin: 0 0 14px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--sl-muted);
}
/* Base passage text — scale via JS var */
.sl-scope .exam-passage p {
  margin: 0 0 14px;
  font-family: var(--sl-font-jp);
  font-size: var(--rd-passage-fs, 19px);
  line-height: var(--rd-passage-lh, 1.95);
  font-weight: 600;
}
.sl-scope .exam-passage .passage-heading {
  margin: 12px 0 8px;
  font-size: 13px;
  font-weight: 700;
  background: var(--sl-accent-soft);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 7px;
  color: var(--sl-accent-on);
}
.sl-scope .exam-question .rq-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.sl-scope .q-chip {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  font-weight: 700;
  font-size: 13px;
  padding: 4px 11px;
  border-radius: 8px;
}
.sl-scope .exam-question .rq-text {
  font-family: var(--sl-font-jp);
  font-size: 17px;
  line-height: 1.85;
  font-weight: 600;
  margin-bottom: 18px;
  padding: 14px 16px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  border-left: 3px solid var(--sl-accent);
}
.sl-scope .rq-options {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sl-scope .rq-options li {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1.5px solid var(--sl-border);
  border-radius: var(--sl-r);
  cursor: pointer;
  transition: all 0.15s;
  background: var(--sl-surface);
}
.sl-scope .rq-options li:hover {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .rq-options li.selected {
  border-color: var(--sl-accent);
  background: var(--sl-accent-soft);
  box-shadow: 0 0 0 2px var(--sl-accent);
}
.sl-scope .rq-options li.opt-right {
  border-color: var(--sl-success);
  background: var(--sl-success-soft);
  box-shadow: 0 0 0 2px var(--sl-success);
  cursor: default;
}
.sl-scope .rq-options li.opt-wrong-pick {
  border-color: var(--sl-danger);
  background: var(--sl-danger-soft);
  cursor: default;
}
.sl-scope .rq-options li.locked {
  cursor: default;
}
.sl-scope .rq-options li.locked:hover {
  background: var(--sl-surface);
  border-color: var(--sl-border);
}
.sl-scope .rq-options li.opt-right:hover {
  background: var(--sl-success-soft);
  border-color: var(--sl-success);
}
.sl-scope .rq-options li.opt-wrong-pick:hover {
  background: var(--sl-danger-soft);
  border-color: var(--sl-danger);
}
.sl-scope .opt-num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--sl-surface-2);
  border-radius: 50%;
  font-weight: 700;
  font-size: 13px;
  color: var(--sl-text-2);
}
.sl-scope .rq-options li.selected .opt-num {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .opt-text {
  font-family: var(--sl-font-jp);
  font-size: 16.5px;
  line-height: 1.8;
  font-weight: 600;
  flex: 1;
}
.sl-scope .rq-actions {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
/* Review screen after submit */
.sl-scope .rd-review-section {
  max-width: 900px;
  margin: 0 auto;
}
.sl-scope .rd-score-hero {
  background: var(--sl-dark-card);
  color: #fff;
  border-radius: var(--sl-r-xl);
  padding: 34px 38px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
}
.sl-scope .rd-score-hero::after {
  content: "✦";
  position: absolute;
  top: 14px;
  right: 18px;
  color: var(--sl-accent);
  font-size: 18px;
}
.sl-scope .rd-score-num {
  font-size: 52px;
  font-weight: 800;
  color: var(--sl-accent);
  line-height: 1;
}
.sl-scope .rd-score-num small {
  font-size: 22px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 700;
}
.sl-scope .rd-score-label {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 8px;
}
.sl-scope .rd-q-review {
  background: var(--sl-surface);
  border-radius: var(--sl-r-lg);
  padding: 22px 26px;
  box-shadow: var(--sl-shadow);
  margin-bottom: 16px;
}
.sl-scope .rd-q-review .rq-text {
  font-family: var(--sl-font-jp);
  font-size: 17px;
  line-height: 1.85;
  padding: 12px 14px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  border-left: 3px solid var(--sl-accent);
  margin-bottom: 14px;
}
.sl-scope .rd-opt-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sl-scope .rd-opt-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  border: 1.5px solid var(--sl-border);
  border-radius: var(--sl-r);
  background: var(--sl-surface);
}
.sl-scope .rd-opt-list li.opt-right {
  border-color: var(--sl-success);
  background: var(--sl-success-soft);
}
.sl-scope .rd-opt-list li.opt-wrong-pick {
  border-color: var(--sl-danger);
  background: var(--sl-danger-soft);
}
.sl-scope .rd-opt-vn {
  font-size: 12.5px;
  color: var(--sl-text-2);
  font-family: "Noto Serif", serif;
  margin-top: 3px;
}
.sl-scope .rd-opt-reason {
  font-size: 12.5px;
  color: var(--sl-text-2);
  margin-top: 5px;
  line-height: 1.55;
}
.sl-scope .rd-trap-badge {
  display: inline-block;
  margin-top: 4px;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--sl-danger-soft);
  color: var(--sl-danger);
}
.sl-scope .rd-technique {
  display: inline-block;
  margin-top: 3px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--sl-success-soft);
  color: var(--sl-success);
}
.sl-scope .rd-what-asked {
  padding: 10px 13px;
  background: var(--sl-info-soft);
  border-radius: var(--sl-r-sm);
  font-size: 13px;
  color: var(--sl-text-2);
  margin-bottom: 10px;
}
.sl-scope .rd-ans-loc {
  padding: 10px 13px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  font-size: 13px;
  margin-bottom: 10px;
}
.sl-scope .rd-ans-loc .al-where {
  font-size: 11.5px;
  color: var(--sl-muted);
  margin-bottom: 4px;
}
.sl-scope .rd-ans-loc .al-jp {
  font-family: var(--sl-font-jp);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 3px;
}
.sl-scope .rd-ans-loc .al-vn {
  font-size: 12.5px;
  color: var(--sl-text-2);
  font-family: "Noto Serif", serif;
}
.sl-scope .rd-passage-meta {
  margin-top: 16px;
  padding: 12px 14px;
  background: var(--sl-surface-2);
  border-radius: var(--sl-r-sm);
  font-size: 12.5px;
}
.sl-scope .rd-passage-meta .kv {
  display: flex;
  gap: 6px;
  align-items: baseline;
  margin-bottom: 4px;
}
.sl-scope .rd-passage-meta .kv label {
  color: var(--sl-muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  flex-shrink: 0;
}
.sl-scope .rd-passage-meta .kv span {
  color: var(--sl-text-2);
}

/* Toast — appended to <body> by rdShowToast (ngoài container để position:fixed bám viewport).
   Không scope .sl-scope: JS gắn class sl-toast trực tiếp. */
.sl-toast {
  position: fixed;
  top: 24px;
  right: 24px;
  background: #1a1a1f;
  color: #fff;
  padding: 13px 18px;
  border-radius: 12px;
  box-shadow: 0 16px 32px -8px rgba(24, 24, 27, 0.12), 0 4px 8px rgba(24, 24, 27, 0.06);
  z-index: 200;
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  animation: toast-in 0.25s ease-out;
  max-width: 360px;
}
.sl-toast .accent {
  color: #c6dc4b;
  font-weight: 700;
}
.sl-toast.expired {
  background: #dc2626;
}
@keyframes toast-in {
  from {
    transform: translateY(-16px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Time-up result: explanations stay hidden until explicitly requested. */
.sl-scope .rd-timeout-result {
  width: min(620px, calc(100% - 24px));
  margin: 48px auto;
  padding: 34px 36px;
  border: 1px solid var(--sl-border-soft);
  border-radius: var(--sl-r-xl);
  background: var(--sl-surface);
  box-shadow: var(--sl-shadow);
  text-align: center;
}
.sl-scope .rd-timeout-icon {
  font-size: 30px;
  line-height: 1;
  margin-bottom: 10px;
}
.sl-scope .rd-timeout-kicker {
  color: var(--sl-danger);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.sl-scope .rd-timeout-result h3 {
  margin: 6px 0 18px;
  font-size: 22px;
}
.sl-scope .rd-timeout-score {
  color: var(--sl-accent-hover);
  font-size: 58px;
  font-weight: 800;
  line-height: 1;
}
.sl-scope .rd-timeout-score small {
  color: var(--sl-muted);
  font-size: 24px;
}
.sl-scope .rd-timeout-label {
  color: var(--sl-text-2);
  font-size: 13.5px;
  margin-top: 8px;
}
.sl-scope .rd-timeout-stats {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 22px 0;
}
.sl-scope .rd-timeout-stats span {
  padding: 7px 12px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
}
.sl-scope .rd-timeout-stats .is-correct {
  color: var(--sl-success);
  background: var(--sl-success-soft);
}
.sl-scope .rd-timeout-stats .is-wrong {
  color: var(--sl-danger);
  background: var(--sl-danger-soft);
}
.sl-scope .rd-timeout-stats .is-skipped {
  color: var(--sl-muted);
  background: var(--sl-surface-2);
}
.sl-scope .rd-timeout-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}
.sl-scope .rd-explanation-actions {
  position: sticky;
  top: 62px;
  z-index: 6;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  padding: 10px;
  border: 1px solid var(--sl-border-soft);
  border-radius: 12px;
  background: rgba(253, 250, 241, 0.95);
  box-shadow: var(--sl-shadow-sm);
  backdrop-filter: blur(10px);
}

@container appcol (max-width: 560px) {
  .sl-scope .rd-timeout-result {
    margin: 20px auto;
    padding: 26px 18px;
  }
  .sl-scope .rd-timeout-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .sl-scope .rd-explanation-actions {
    position: static;
  }
  .sl-scope .rd-explanation-actions .btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}

/* Session summary chips */
.sl-scope .summary-wrap {
  max-width: 720px;
  margin: 24px auto;
}
.sl-scope .summary-hero {
  background: var(--sl-dark-card);
  color: #fff;
  border-radius: var(--sl-r-xl);
  padding: 36px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 16px;
}
.sl-scope .summary-hero::after {
  content: "✦";
  position: absolute;
  top: 16px;
  right: 20px;
  color: var(--sl-accent);
  font-size: 20px;
}
.sl-scope .summary-score {
  font-size: 52px;
  font-weight: 800;
  color: var(--sl-accent);
  line-height: 1;
}
.sl-scope .summary-score small {
  font-size: 22px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 700;
}
.sl-scope .summary-label {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 8px;
}
.sl-scope .summary-stats {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
  flex-wrap: wrap;
}
.sl-scope .summary-stat {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 9px 16px;
  font-size: 13.5px;
  font-weight: 600;
}
.sl-scope .summary-card {
  background: var(--sl-surface);
  border-radius: var(--sl-r-lg);
  padding: 22px 26px;
  box-shadow: var(--sl-shadow);
}
.sl-scope .sum-chip {
  padding: 7px 11px;
  border-radius: 9px;
  font-weight: 700;
  font-size: 13px;
  border: 1.5px solid;
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.05s;
}
.sl-scope .sum-chip:hover {
  transform: translateY(-1px);
}
.sl-scope .sum-chip.ok {
  background: var(--sl-success-soft);
  border-color: var(--sl-success);
  color: var(--sl-success);
}
.sl-scope .sum-chip.no {
  background: var(--sl-danger-soft);
  border-color: var(--sl-danger);
  color: var(--sl-danger);
}
.sl-scope .sum-chip.skip {
  background: var(--sl-surface-2);
  border-color: var(--sl-border);
  color: var(--sl-muted);
}

/* Session group header with "Làm cả kỳ" button */
.sl-scope .session-group-hdr {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 18px 0 8px;
  flex-wrap: wrap;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--sl-border-soft);
}
.sl-scope .session-group-hdr .sg-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--sl-text);
  letter-spacing: 0.05em;
}
.sl-scope .session-group-hdr .sg-cnt {
  background: var(--sl-surface-2);
  color: var(--sl-muted);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 999px;
  font-weight: 500;
}
.sl-scope .btn-session-all {
  margin-left: auto;
  padding: 4px 10px;
  border-radius: 7px;
  border: 0;
  font-size: 12px;
  font-weight: 700;
  font-family: inherit;
  background: var(--sl-dark-card);
  color: #fff;
  cursor: pointer;
  transition: background 0.13s;
  white-space: nowrap;
}
.sl-scope .btn-session-all:hover {
  background: var(--sl-dark-card-2);
}

/* ---- Content focus: max-width + breathing room ---- */
.sl-scope .content-focus {
  width: var(--sl-practice-stage-w);
  max-width: 100%;
  margin: 0 auto;
  padding: 0 4px;
}
.sl-scope .content-focus.gr-m7-focus {
  max-width: 1280px;
}
.sl-scope .gr-m7-layout {
  grid-template-columns: minmax(0, 3fr) minmax(400px, 2fr);
  max-width: 1280px;
  gap: 28px;
}
.sl-scope .gr-m7-passage {
  width: 100%;
}
.sl-scope .gr-m7-questions,
.sl-scope .gr-m7-questions .gr-card {
  width: 100%;
  max-width: none;
}

@container appcol (max-width: 1050px) {
  .sl-scope .gr-m7-layout {
    grid-template-columns: 1fr;
    max-width: 800px;
  }
  .sl-scope .gr-m7-passage {
    position: static !important;
    max-height: none;
  }
}

/* ---- Reading exam: bề rộng do sl-container quyết, không tự đặt stage ---- */
.sl-scope .exam-content-wrap {
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
  padding: 0 8px;
  transform: none;
}

#app-shell.is-sidebar-hidden .sl-scope .exam-bar,
#app-shell.is-sidebar-hidden .sl-scope .exam-content-wrap {
  transform: none !important;
}
/* Larger passage font — scale via --rd-passage-fs CSS variable */
:root {
  --rd-passage-fs: 19px;
  --rd-passage-lh: 1.95;
}
/* Font-size control widget: A− A A+ */
.sl-scope .fs-ctrl {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--sl-surface);
  border: 1px solid var(--sl-border);
  border-radius: 8px;
  padding: 3px 6px;
}
.sl-scope .fs-ctrl > span.fs-sep {
  font-size: 11px;
  color: var(--sl-border);
  padding: 0 2px;
  user-select: none;
}
.sl-scope .fs-btn {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 700;
  color: var(--sl-text-2);
  cursor: pointer;
  font-family: inherit;
  line-height: 1;
  transition:
    background 0.1s,
    color 0.1s;
}
.sl-scope .fs-btn:hover {
  background: var(--sl-accent-soft);
  color: var(--sl-accent-on);
}
.sl-scope .fs-btn.active {
  background: var(--sl-accent);
  color: var(--sl-accent-on);
}
.sl-scope .fs-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--sl-text-2);
  min-width: 28px;
  text-align: center;
}

/* ---- Màn chọn bài (phòng bài tập kanji/vocab/grammar) ---- */
.sl-scope .gr-chooser {
  display: flex;
  flex-direction: column;
  gap: 26px;
  max-width: 980px;
  margin: 0 auto;
  padding-top: 8px;
}
.sl-scope .gr-resume-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  background: var(--sl-dark-card);
  color: var(--sl-dark-text);
  border: none;
  border-radius: var(--sl-r-lg);
  padding: 18px 22px;
  cursor: pointer;
  text-align: left;
  box-shadow: var(--sl-shadow-md);
  transition: transform 0.15s, box-shadow 0.15s;
  font: inherit;
}
.sl-scope .gr-resume-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--sl-shadow-lg);
}
.sl-scope .gr-resume-txt {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.sl-scope .gr-resume-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sl-accent);
}
.sl-scope .gr-resume-title {
  font-size: 16px;
  font-weight: 700;
}
.sl-scope .gr-resume-go {
  flex-shrink: 0;
  background: var(--sl-accent);
  color: var(--sl-accent-on);
  font-size: 13px;
  font-weight: 800;
  padding: 9px 16px;
  border-radius: 10px;
}
.sl-scope .gr-choose-group {
  background: var(--sl-surface);
  border: 1px solid var(--sl-border-soft);
  border-radius: var(--sl-r-lg);
  box-shadow: var(--sl-shadow-sm);
  padding: 18px 20px;
}
.sl-scope .gr-choose-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.sl-scope .gr-choose-head h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
}
.sl-scope .gr-choose-meta {
  font-size: 12px;
  color: var(--sl-text-2);
  margin-right: auto;
}
.sl-scope .gr-choose-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}
.sl-scope .gr-pick {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  border: 1px solid var(--sl-border);
  border-radius: 10px;
  background: var(--sl-surface-2);
  padding: 9px 11px;
  cursor: pointer;
  text-align: left;
  font: inherit;
  transition: border-color 0.15s, transform 0.15s;
}
.sl-scope .gr-pick:hover {
  border-color: var(--sl-accent-hover);
  transform: translateY(-1px);
}
.sl-scope .gr-pick-sess {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--sl-text);
}
.sl-scope .gr-pick-status {
  font-size: 11px;
  color: var(--sl-text-2);
}
.sl-scope .gr-pick.done {
  background: var(--sl-success-soft);
  border-color: rgba(22, 163, 74, 0.35);
}
.sl-scope .gr-pick.done .gr-pick-status {
  color: var(--sl-success);
  font-weight: 600;
}
.sl-scope .gr-pick.doing {
  background: var(--sl-warn-soft);
  border-color: rgba(217, 119, 6, 0.35);
}
.sl-scope .gr-pick.doing .gr-pick-status {
  color: var(--sl-warn);
  font-weight: 600;
}

/* ---- Grammar scroll layout: sticky score header ---- */
.sl-scope .gr-sticky-header {
  position: sticky;
  top: 60px; /* below topbar */
  z-index: 5;
  background: var(--sl-bg);
  padding: 8px 0 10px;
  border-bottom: 1px solid var(--sl-border-soft);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.sl-scope .gr-sticky-header .score-chip {
  flex-shrink: 0;
}
.sl-scope .gr-sticky-detail {
  font-size: 12.5px;
  color: var(--sl-text-2);
  font-weight: 500;
}

/* ---- Session group header (grammar) ---- */
.sl-scope .gr-session-hdr {
  font-size: 12px;
  font-weight: 700;
  color: var(--sl-sidebar-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 28px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--sl-border-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sl-scope .gr-session-hdr:first-child {
  margin-top: 0;
}
.sl-scope .gr-session-hdr .cnt {
  background: var(--sl-surface-2);
  color: var(--sl-muted);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 999px;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
}

/* ---- Responsive ---- */
@container appcol (max-width: 1100px) {
  .sl-scope .reading-layout {
    grid-template-columns: 1fr;
  }
  .sl-scope .passage-panel {
    position: static;
    max-height: none;
  }
}
/* Reading review/list grids (responsive via class instead of inline styles) */
.sl-scope .rd-review-grid {
  display: grid;
  grid-template-columns: 55% 45%;
  gap: 20px;
  align-items: start;
}
.sl-scope .rd-list-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  align-items: start;
}
/* Chưa chọn bài nào: danh sách đứng giữa như chế độ Làm bài, không còn
   dải 320px dồn sát trái với 2/3 màn hình trống bên phải. */
.sl-scope .rd-list-grid--browsing {
  grid-template-columns: minmax(0, 720px);
  justify-content: center;
}
.sl-scope .rd-list-grid--browsing #sl-rdDetail {
  display: none;
}

@container appcol (max-width: 860px) {
  .sl-scope .content-focus {
    width: 100%;
    max-width: 100%;
  }

  /* Reading exam + review: stack vertically, no fixed heights, tighter padding */
  .sl-scope .exam-split {
    grid-template-columns: 1fr;
  }
  .sl-scope .exam-passage,
  .sl-scope .exam-question { width: 100%;
    position: static;
    max-height: none;
    padding: 18px 16px;
  }
  .sl-scope .exam-split > .exam-passage:not(.gr-m7-passage) {
    width: 100%;
    margin-left: 0;
  }
  .sl-scope .exam-content-wrap {
    padding: 0;
  }
  .sl-scope .exam-bar {
    flex-wrap: wrap;
    row-gap: 8px;
  }
  .sl-scope .rd-review-grid,
  .sl-scope .rd-list-grid {
    grid-template-columns: 1fr;
  }
  .sl-scope .gr-card {
    padding: 18px 16px;
  }
  .sl-scope .gr-sentence {
    font-size: 17px;
    line-height: 2;
    padding: 14px 14px;
  }
  .sl-scope .summary-hero,
  .sl-scope .rd-score-hero {
    padding: 24px 18px;
  }

  /* Grammar section spacing tweaks */
  .sl-scope .test-completion-summary {
    padding: 8px 10px;
    font-size: 12px;
    gap: 6px;
    margin-bottom: 12px;
  }
  .sl-scope .gr-sticky-header {
    padding: 6px 0 8px;
    gap: 8px;
    margin-bottom: 14px;
  }
  .sl-scope .timer {
    padding: 5px 10px;
    font-size: 14px;
  }
}
@container appcol (max-width: 600px) {
  .sl-scope .fragment-grid {
    grid-template-columns: 1fr;
  }
  .sl-scope .gr-card {
    padding: 18px 16px;
  }
}

/* ---- Embed mode ---- */
.sl-scope .blank-marker {
  border-bottom-color: var(--sl-accent) !important;
  background: var(--sl-accent-soft) !important;
  color: var(--sl-accent-hover) !important;
  font-size: 15px !important;
  min-width: 60px !important;
  padding: 0 4px !important;
  margin: 0 4px !important;
  font-weight: 600 !important;
}
.sl-scope,
.sl-layout,
.sl-main,
.sl-container,
.content-focus,
.sl-root,
#app {
  overflow: visible !important;
}

/* ---- Prevent dictionary extensions from being clipped ---- */
.sl-scope .gr-choices li {
  overflow: visible !important;
}
.sl-scope .gr-choice-body {
  overflow: visible !important;
}
.sl-scope .gr-choice-form {
  overflow: visible !important;
}
.sl-scope .sum-chip.ok {
  background: var(--sl-success-soft);
  border-color: var(--sl-success);
  color: var(--sl-success);
}
.sl-scope .sum-chip.no {
  background: var(--sl-danger-soft);
  border-color: var(--sl-danger);
  color: var(--sl-danger);
}
.sl-scope .sum-chip.skip {
  background: var(--sl-surface-2);
  border-color: var(--sl-border);
  color: var(--sl-muted);
}

/* Session group header with "Làm cả kỳ" button */

/* ---- Vocab Highlight (Mondai 4) ---- */
/* Neon là màu NỀN, không phải màu chữ trên nền sáng: giữ mực tối, gạch chân neon. */
.sl-scope .vocab-hl {
  text-decoration: underline;
  text-decoration-color: var(--sl-accent-hover);
  text-decoration-thickness: 2px;
  font-weight: 600;
  color: var(--sl-text);
  background: var(--sl-accent-soft);
}

/* Full-test library and mixed exam flow — bề rộng theo sl-container */
.sl-scope .ft-library {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}
.sl-scope .ft-library-hero {
  margin-bottom: 26px;
  max-width: 680px;
}
.sl-scope .ft-kicker {
  display: inline-block;
  color: var(--sl-accent-hover);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.sl-scope .ft-library-hero h3 {
  margin: 0 0 8px;
  font-size: clamp(25px, 3vw, 36px);
  letter-spacing: -0.03em;
}
.sl-scope .ft-library-hero p {
  margin: 0;
  color: var(--sl-text-2);
  line-height: 1.65;
}
.sl-scope .ft-exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.sl-scope .ft-exam-card {
  position: relative;
  overflow: hidden;
  background: var(--sl-surface);
  border: 1px solid var(--sl-border-soft);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(24, 24, 27, 0.06);
  cursor: pointer;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease;
}
.sl-scope .ft-exam-card::after {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  right: -54px;
  top: -58px;
  background: var(--sl-accent-soft);
  opacity: 0.7;
}
.sl-scope .ft-exam-card:hover {
  transform: translateY(-3px);
  border-color: var(--sl-accent);
  box-shadow: 0 14px 34px rgba(24, 24, 27, 0.11);
}
.sl-scope .ft-card-top {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sl-scope .ft-card-index {
  font-size: 12px;
  font-weight: 800;
  color: var(--sl-muted);
}
.sl-scope .ft-card-level {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--sl-accent-hover);
  background: var(--sl-accent-soft);
}
.sl-scope .ft-exam-card h4 {
  margin: 20px 0 16px;
  font-size: 21px;
  letter-spacing: -0.02em;
}
.sl-scope .ft-card-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-bottom: 16px;
}
.sl-scope .ft-card-stats span {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px 6px;
  border-radius: 10px;
  text-align: center;
  font-size: 10px;
  color: var(--sl-muted);
  background: var(--sl-surface-2);
}
.sl-scope .ft-card-stats b {
  font-size: 15px;
  color: var(--sl-text);
}
.sl-scope .ft-start-btn {
  width: 100%;
  justify-content: space-between;
  border-radius: 11px;
}
.sl-scope .ft-scroll-workspace {
  display: block;
  width: 100%;
  max-width: none;
  margin: 0 auto;
}
.sl-scope .ft-scroll-intro {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: end;
  margin: 22px 0 18px;
  padding: 22px 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--sl-surface), var(--sl-accent-soft));
  border: 1px solid var(--sl-border-soft);
}
.sl-scope .ft-scroll-intro h3 {
  margin: 0;
  font-size: 22px;
}
.sl-scope .ft-scroll-intro p {
  max-width: 380px;
  margin: 0;
  color: var(--sl-text-2);
  font-size: 12px;
  line-height: 1.6;
}
.sl-scope .ft-mondai-group {
  margin-bottom: 24px;
}
.sl-scope .ft-mondai-heading {
  position: sticky;
  top: 64px;
  z-index: 4;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  margin-bottom: 8px;
  border: 1px solid var(--sl-border-soft);
  border-radius: 10px;
  background: rgba(253, 250, 241, 0.94);
  backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 800;
}
.sl-scope .ft-mondai-heading small {
  color: var(--sl-muted);
  font-weight: 600;
}
.sl-scope .ft-scroll-question {
  padding: 20px 22px;
  margin-bottom: 9px;
  background: var(--sl-surface);
  border: 1px solid var(--sl-border-soft);
  border-radius: 13px;
  box-shadow: 0 4px 14px rgba(24, 24, 27, 0.035);
  scroll-margin-top: 120px;
}
.sl-scope .ft-scroll-question.current {
  border-color: var(--sl-accent);
}
.sl-scope .ft-scroll-question .rq-text {
  font-family: var(--sl-font-jp);
  font-size: 18px;
  line-height: 1.8;
  font-weight: 600;
  margin: 10px 0 13px;
}
.sl-scope .ft-scroll-question .rq-options .opt-text {
  font-weight: 500;
}
.sl-scope .ft-exam-active .exam-passage p {
  font-weight: 500;
}
.sl-scope .ft-exam-active .exam-question .rq-text {
  font-weight: 600;
}
.sl-scope .ft-exam-active .rq-options .opt-text {
  font-weight: 500;
}
.sl-scope .ft-scroll-finish {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 20px 22px;
  margin: 28px 0;
  border-radius: 14px;
  background: var(--sl-surface);
  border: 1px solid var(--sl-accent);
}
.sl-scope .ft-scroll-finish div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.sl-scope .ft-scroll-finish span {
  color: var(--sl-text-2);
  font-size: 12px;
}
.sl-scope .passage-q-progress {
  margin-left: auto;
  color: var(--sl-muted);
  font-size: 11px;
  font-weight: 700;
}
.sl-scope .m7-full-passage {
  min-height: 100%;
}
.sl-scope .m7-passage-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-bottom: 13px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--sl-border-soft);
}
.sl-scope .m7-passage-title span {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sl-accent-hover);
}
.sl-scope .m7-passage-title small {
  font-size: 10px;
  color: var(--sl-muted);
}
.sl-scope .m7-passage-body p {
  font-family: var(--sl-font-jp);
  font-size: var(--rd-passage-fs, 19px);
  line-height: var(--rd-passage-lh, 1.95);
  font-weight: 500;
  margin: 0 0 10px;
}
.sl-scope .m7-passage-body .m7-question-line {
  padding: 8px 10px;
  margin: 4px -10px 10px;
  border-radius: 8px;
  background: var(--sl-surface-2);
}
.sl-scope .m7-blank-slot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  margin: 0 4px;
  padding: 0 7px;
  border-bottom: 2px solid var(--sl-accent);
  border-radius: 5px 5px 0 0;
  background: var(--sl-accent-soft);
  color: var(--sl-accent-hover);
  font-size: 0.8em;
  font-weight: 800;
}

@container appcol (max-width: 720px) {
  .sl-scope .ft-scroll-intro {
    align-items: start;
    flex-direction: column;
    gap: 10px;
  }
  .sl-scope .ft-scroll-question {
    padding: 17px 14px;
  }
  .sl-scope .ft-scroll-finish {
    align-items: stretch;
    flex-direction: column;
  }
}

/* Fix test mode double padding */
.sl-scope .ft-exam-active .exam-question {
  padding: 0 !important;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}
@container appcol (max-width: 1024px) {
  .sl-scope .ft-scroll-question {
    margin-left: 0;
    margin-right: 0;
  }
}

/* ---- Reading item completed state ---- */
.sl-scope .reading-item.is-done {
  border-left-color: var(--sl-accent);
  background: var(--sl-accent-soft);
}
.sl-scope .ri-done-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #d1fae5;
  color: #059669;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  margin-left: 8px;
  vertical-align: middle;
}

/* =========================================================================
   Reading Mode Layout Optimization (Fill empty screen space)
   ========================================================================= */
@container appcol (min-width: 1080px) {
  .sl-scope .exam-content-wrap {
    width: 100% !important;
    max-width: 100% !important;
  }
  .sl-scope .exam-split {
    gap: 28px;
  }
  .sl-scope .exam-passage,
  .sl-scope .exam-question { width: 100%;
    padding: 38px 46px;
  }
  .sl-scope .exam-question .rq-text {
    font-size: 16.5px;
    line-height: 1.85;
  }
  .sl-scope .rq-options .opt-text {
    font-size: 15.5px;
  }
}

@container appcol (min-width: 1440px) {
  .sl-scope .exam-split {
    gap: 36px;
  }
  .sl-scope .exam-passage,
  .sl-scope .exam-question { width: 100%;
    padding: 48px 56px;
  }
  .sl-scope .exam-question .rq-text {
    font-size: 18px;
    line-height: 1.9;
  }
  .sl-scope .rq-options .opt-text {
    font-size: 17px;
  }
}

@container appcol (min-width: 1700px) {
  .sl-scope .exam-split {
    gap: 44px;
  }
  .sl-scope .exam-passage,
  .sl-scope .exam-question { width: 100%;
    padding: 56px 64px;
  }
  .sl-scope .exam-question .rq-text {
    font-size: 20px;
    line-height: 1.95;
  }
  .sl-scope .rq-options .opt-text {
    font-size: 18.5px;
  }
}

/* A3 (260903): mobile + tablet (<1024px, topbar dính chiếm trọn bề ngang) — toast xuống đáy, không đè thanh dính đỉnh. */
@media (max-width: 1023px) {
  .sl-toast { top: auto; bottom: 84px; left: 12px; right: 12px; max-width: none; }
}