/* ==========================================================================
   ENGLISH PRACTICE — clean white theme with serif headings
   ========================================================================== */

:root {
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --bg-page: #ffffff;
  --bg-book: #ffffff;
  --bg-sheet: #ffffff;
  --bg-sheet-alt: #fafaf8;
  --bg-sheet-highlight: #f4f3ef;

  --ink-black: #1a1a1a;
  --ink-primary: #222222;
  --ink-secondary: #4a4742;
  --ink-muted: #69655e;
  --ink-faint: #8c877e;

  --line-strong: #1a1a1a;
  --line-main: #333333;
  --line-card: #ddd9d0;
  --line-subtle: #ece9e1;
  --line-ruled: #eae7e0;

  --academic-blue: #162f52;
  --academic-gold: #8a6d1d;
  --academic-burgundy: #7a1c1c;

  --ink-correct: #134e2c;
  --bg-correct: #edf7f1;
  --line-correct: #1b663b;

  --ink-wrong: #8b1818;
  --bg-wrong: #fdf1f1;
  --line-wrong: #a12323;

  --book-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --card-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-pill: 4px;

  /* Semantic aliases for writing mode and components */
  --serif: var(--font-serif);
  --text: var(--ink-primary);
  --muted: var(--ink-secondary);
  --soft: var(--ink-muted);
  --line: var(--line-card);
  --accent: var(--academic-gold);
  --accent-2: var(--academic-blue);
  --success: var(--ink-correct);
  --danger: var(--ink-wrong);
  --radius-lg: 8px;
  --radius-xl: 12px;
  --shadow: var(--card-shadow);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--ink-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button,
input,
textarea,
select {
  font-family: var(--font-sans);
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

/* --------------------------------------------------------------------------
   PAGE CONTAINER
   -------------------------------------------------------------------------- */
.page-shell {
  max-width: 1160px;
  margin: 28px auto 48px;
  padding: 0 16px;
}

/* --------------------------------------------------------------------------
   MASTHEAD & TOP BAR
   -------------------------------------------------------------------------- */
.academic-masthead {
  margin-bottom: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line-card);
}

.running-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.95rem;
  color: var(--ink-muted);
  font-weight: 600;
  flex-wrap: wrap;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-subtle);
}

.running-head-text {
  font-weight: 700;
  color: var(--ink-black);
}

/* Language Switcher in Running Head */
.academic-lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  text-transform: none;
  letter-spacing: normal;
}

.lang-label {
  font-weight: 700;
  color: var(--ink-primary);
}

.lang-toggle-pill {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--line-strong);
  background: var(--bg-sheet);
  border-radius: var(--radius-xs);
  padding: 2px 4px;
}

.lang-btn {
  background: none;
  border: none;
  padding: 4px 10px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink-secondary);
  transition: all 120ms ease;
  border-radius: var(--radius-xs);
}

.lang-btn:hover {
  color: var(--ink-black);
  text-decoration: underline;
}

.lang-btn.is-active {
  background: var(--ink-black);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.lang-divider {
  color: var(--line-card);
  font-size: 0.78rem;
}

/* --------------------------------------------------------------------------
   TYPOGRAPHY
   -------------------------------------------------------------------------- */
.academic-eyebrow {
  margin: 0 0 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-muted);
}

.book-title {
  margin: 0 0 12px;
  font-size: clamp(2rem, 3.8vw, 2.9rem);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-black);
}

.book-subtitle {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--ink-secondary);
  max-width: 62ch;
}

/* Serif for headings, sans for body and controls */
.book-title,
.section-heading h2,
.mode-card h3,
.level-card h3,
.feature-card h3,
.step-list h3,
.test-score-counter,
.results-section-heading,
.prompt-card h3,
.paragraph-title,
.feedback-headline {
  font-family: var(--font-serif);
}

.masthead-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   BUTTONS (CLASSICAL INK & PRINTED BORDERS)
   -------------------------------------------------------------------------- */
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 1.02rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: all 140ms ease;
  letter-spacing: 0.02em;
}

.primary-button {
  background: var(--ink-black);
  color: #ffffff;
  border: 1.5px solid var(--ink-black);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.primary-button:hover {
  background: #333333;
  border-color: #333333;
  transform: translateY(-1px);
}

.primary-button:active {
  transform: translateY(0);
  background: #000000;
}

.secondary-button {
  background: var(--bg-sheet);
  color: var(--ink-black);
  border: 1.5px solid var(--line-strong);
}

.secondary-button:hover {
  background: var(--bg-sheet-highlight);
  border-color: var(--ink-black);
  transform: translateY(-1px);
}

.secondary-button:active {
  transform: translateY(0);
  background: #e2ddd3;
}

/* --------------------------------------------------------------------------
   CARDS & SECTIONS
   -------------------------------------------------------------------------- */
.landing-layout {
  display: grid;
  gap: 32px;
}

.book-card {
  background: var(--bg-book);
  border: 1.5px solid var(--line-card);
  padding: 30px 28px;
  box-shadow: var(--card-shadow);
  border-radius: var(--radius-xs);
  position: relative;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.6rem, 2.6vw, 2.15rem);
  line-height: 1.2;
  color: var(--ink-black);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   PRACTICE MODES (SECTION I)
   -------------------------------------------------------------------------- */
.mode-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 24px;
}

.mode-card {
  background: var(--bg-sheet);
  border: 1.5px solid var(--line-card);
  padding: 26px 24px;
  border-radius: var(--radius-xs);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.mode-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.mode-card.is-featured {
  border: 2px solid var(--line-strong);
  background: var(--bg-sheet-alt);
}

.mode-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.academic-badge {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 8px;
  border: 1px solid var(--line-strong);
  background: var(--ink-black);
  color: #ffffff;
  border-radius: var(--radius-xs);
}

.mode-meta {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--ink-secondary);
}

.mode-card h3 {
  margin: 0 0 10px;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink-black);
}

.mode-desc {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.68;
  color: var(--ink-secondary);
}

.mode-bullets {
  margin: 0 0 24px;
  padding-left: 20px;
  color: var(--ink-secondary);
  font-size: 0.96rem;
  line-height: 1.65;
}

.mode-bullets li {
  margin-bottom: 6px;
}

.mode-cta-row {
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   LEVEL SELECTION (SECTION II)
   -------------------------------------------------------------------------- */
.level-intro {
  margin: 8px 0 0;
  font-size: 1.05rem;
  color: var(--ink-secondary);
  max-width: 60ch;
  line-height: 1.6;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.level-card {
  background: var(--bg-sheet);
  border: 1.5px solid var(--line-card);
  padding: 24px 20px;
  border-radius: var(--radius-xs);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 160ms ease;
}

.level-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.07);
  transform: translateY(-2px);
}

.level-card.is-featured {
  border: 2px solid var(--line-strong);
  background: var(--bg-sheet-alt);
}

.level-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 8px;
  border: 1px solid var(--line-strong);
  background: var(--bg-sheet-highlight);
  color: var(--ink-black);
  border-radius: var(--radius-xs);
}

.beginner-badge {
  background: #ebf5ee;
  border-color: #1b663b;
  color: #114a29;
}

.intermediate-badge {
  background: #eaf1f8;
  border-color: #1b4b7a;
  color: #11365c;
}

.advanced-badge {
  background: #faf3e8;
  border-color: #8b6508;
  color: #634704;
}

.ielts-badge {
  background: #faeef3;
  border-color: #8a1f4d;
  color: #6b143a;
}

.all-badge {
  background: #f1edfa;
  border-color: #4a2c7a;
  color: #3b2163;
}

.level-card h3 {
  margin: 12px 0 6px;
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--ink-black);
}

.level-desc {
  margin: 0 0 16px;
  font-size: 0.95rem;
  line-height: 1.62;
  color: var(--ink-secondary);
  flex-grow: 1;
}

.level-features {
  margin: 0 0 20px;
  padding-left: 18px;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--ink-muted);
}

.level-features li {
  margin-bottom: 4px;
}

.level-actions-stack {
  display: grid;
  gap: 8px;
}

.level-btn {
  width: 100%;
  font-size: 0.92rem;
  padding: 10px 14px;
}

/* --------------------------------------------------------------------------
   FEATURE GRID (SECTION III - PEDAGOGICAL PILLARS)
   -------------------------------------------------------------------------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 24px;
  background: var(--bg-sheet);
  border: 1.5px solid var(--line-card);
}

.feature-card h3 {
  margin: 0;
  font-size: 1.26rem;
  line-height: 1.3;
  color: var(--ink-black);
  font-weight: 700;
}

.feature-card p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--ink-secondary);
}

/* --------------------------------------------------------------------------
   STEPS GUIDE (SECTION IV)
   -------------------------------------------------------------------------- */
.step-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}

.step-list li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 0;
  border-top: 1px solid var(--line-card);
}

.step-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.step-number {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--line-strong);
  background: var(--bg-sheet-highlight);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--ink-black);
  border-radius: var(--radius-xs);
}

.step-list h3 {
  margin: 0 0 6px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-black);
}

.step-list p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--ink-secondary);
}

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--line-card);
  background: var(--bg-sheet-alt);
}

.site-footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 28px 16px 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.site-footer-brand {
  display: grid;
  gap: 6px;
}

.site-footer-name {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink-black);
}

.footer-text {
  font-size: 0.88rem;
  color: var(--ink-muted);
  margin: 0;
  max-width: 42ch;
  line-height: 1.6;
}

.site-footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 4px;
}

.site-footer-links a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-secondary);
}

.site-footer-links a:hover {
  color: var(--ink-black);
  text-decoration: underline;
}

.site-footer-copyright {
  flex-basis: 100%;
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-subtle);
  font-size: 0.82rem;
  color: var(--ink-faint);
}

/* ==========================================================================
   TEST SCREEN STYLES
   ========================================================================== */
.test-topbar-content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.test-topbar-copy {
  max-width: 60rem;
}

.test-topbar-nav {
  flex-shrink: 0;
}

.back-btn {
  padding: 8px 16px;
  font-size: 0.92rem;
}

.topbar-actions-pills {
  display: flex;
  align-items: center;
  gap: 10px;
}

.academic-pill {
  border: 1px solid var(--line-strong);
  background: var(--bg-sheet);
  color: var(--ink-black);
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-xs);
}

.mode-pill {
  background: #eef1f5;
  border-color: #33475e;
  color: #22344a;
}

.level-pill {
  background: #f4f3ef;
  border-color: #4a4742;
  color: #3a3733;
}

.test-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(260px, 0.75fr);
  gap: 24px;
}

.test-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.test-score-counter {
  margin: 4px 0 0;
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  font-weight: 700;
  color: var(--ink-black);
}

.progress-label {
  border: 1px solid var(--line-strong);
  background: var(--bg-sheet-highlight);
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-black);
  border-radius: var(--radius-xs);
}

.progress-track {
  margin-top: 14px;
  margin-bottom: 22px;
  width: 100%;
  height: 8px;
  border: 1px solid var(--line-strong);
  background: var(--bg-sheet);
  overflow: hidden;
  border-radius: var(--radius-xs);
}

.progress-bar {
  height: 100%;
  background: var(--ink-black);
  transition: width 200ms ease;
}

.side-card {
  background: var(--bg-sheet-alt);
  border: 1.5px solid var(--line-card);
  align-self: start;
}

.side-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.side-list li {
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   SENTENCE MODE QUESTION PROMPT & OPTIONS
   -------------------------------------------------------------------------- */
.prompt-card {
  padding: 24px;
  background: var(--bg-sheet);
  border: 1.5px solid var(--line-card);
  border-radius: var(--radius-xs);
}

.prompt-card h3 {
  margin: 0;
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  line-height: 1.4;
  color: var(--ink-black);
  font-weight: 700;
}

.hidden-topic-note {
  margin: 12px 0 0;
  font-size: 0.94rem;
  font-style: italic;
  color: var(--ink-muted);
}

.option-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.option-button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  padding: 14px 18px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-book);
  color: var(--ink-primary);
  border-radius: var(--radius-xs);
  transition: all 120ms ease;
  font-size: 1.05rem;
}

.option-button:hover {
  border-color: var(--line-strong);
  background: var(--bg-sheet-highlight);
  transform: translateY(-1px);
}

.option-button.is-selected {
  border: 2px solid var(--ink-black);
  background: var(--bg-sheet-highlight);
  font-weight: 700;
}

.option-button.is-correct {
  border: 2px solid var(--line-correct);
  background: var(--bg-correct);
  color: var(--ink-correct);
}

.option-button.is-wrong {
  border: 2px solid var(--line-wrong);
  background: var(--bg-wrong);
  color: var(--ink-wrong);
}

.option-letter {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--line-strong);
  background: var(--bg-sheet);
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: 50%;
}

.option-text {
  line-height: 1.45;
  flex-grow: 1;
}

/* --------------------------------------------------------------------------
   PARAGRAPH CLOZE EXERCISE & LINED PASSAGE BOX
   -------------------------------------------------------------------------- */
.paragraph-exercise-card {
  display: grid;
  gap: 22px;
}

.paragraph-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.paragraph-badge {
  background: var(--ink-black);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
}

.paragraph-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-black);
}

/* Lined Academic Notebook Passage */
.paragraph-passage-box {
  padding: 24px 28px;
  border: 1.5px solid var(--line-strong);
  background-color: var(--bg-sheet);
  background-image: repeating-linear-gradient(transparent, transparent 31px, var(--line-ruled) 32px);
  box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-xs);
}

.paragraph-passage-text {
  margin: 0;
  font-size: 1.2rem;
  line-height: 32px;
  color: var(--ink-black);
  letter-spacing: 0.01em;
}

/* Fill-in Blank Pills inside Passage */
.paragraph-blank-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  margin: 0 4px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: var(--radius-xs);
  transition: all 140ms ease;
  vertical-align: baseline;
  line-height: 24px;
}

.paragraph-blank-pill.is-empty {
  background: #f7f3ea;
  border: 1.5px dashed var(--line-strong);
  color: var(--academic-gold);
}

.paragraph-blank-pill.is-filled {
  background: #eef6f0;
  border: 1.5px solid var(--line-correct);
  color: var(--ink-correct);
}

.paragraph-blank-pill.is-active {
  outline: 2px solid var(--ink-black);
  background: #f0e9dc;
  color: var(--ink-black);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

/* Blank Picker Nav Tabs */
.blanks-picker-container {
  display: grid;
  gap: 16px;
}

.blank-nav-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.blank-nav-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-sheet);
  color: var(--ink-secondary);
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: var(--radius-xs);
  transition: all 120ms ease;
}

.blank-nav-tab:hover {
  border-color: var(--line-strong);
  background: var(--bg-sheet-highlight);
}

.blank-nav-tab.is-active {
  border-color: var(--ink-black);
  background: var(--ink-black);
  color: #ffffff;
}

.blank-nav-tab.is-active .tab-number {
  border-color: #ffffff;
  background: #ffffff;
  color: var(--ink-black);
}

.blank-nav-tab.is-filled .tab-number {
  background: #ebf5ee;
  border-color: #1b663b;
  color: #114a29;
}

.tab-number {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: var(--bg-book);
  font-size: 0.78rem;
  font-weight: 800;
  border-radius: 50%;
}

.tab-selection {
  font-weight: 800;
}

.active-blank-box {
  padding: 20px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-sheet);
  border-radius: var(--radius-xs);
}

.active-blank-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.active-blank-status {
  font-size: 0.9rem;
  font-style: italic;
  color: var(--ink-secondary);
}

/* --------------------------------------------------------------------------
   FEEDBACK STYLES
   -------------------------------------------------------------------------- */
.feedback-panel {
  margin-top: 24px;
  padding: 24px;
  border: 2px solid var(--line-strong);
  background: var(--bg-sheet);
  border-radius: var(--radius-xs);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.chip,
.badge {
  border: 1px solid var(--line-strong);
  background: var(--bg-book);
  padding: 5px 10px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--ink-black);
  border-radius: var(--radius-xs);
}

.chip.topic {
  background: #eaf1f8;
  border-color: #1b4b7a;
  color: #11365c;
}

.chip.level {
  background: #faf3e8;
  border-color: #8b6508;
  color: #634704;
}

.chip.correct {
  background: var(--bg-correct);
  border-color: var(--line-correct);
  color: var(--ink-correct);
}

.chip.wrong {
  background: var(--bg-wrong);
  border-color: var(--line-wrong);
  color: var(--ink-wrong);
}

.feedback-headline {
  margin: 0 0 16px;
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.feedback-headline.is-correct {
  color: var(--ink-correct);
}

.feedback-headline.is-wrong {
  color: var(--ink-wrong);
}

.feedback-headline.is-partial {
  color: var(--academic-gold);
}

.feedback-grid {
  display: grid;
  gap: 10px;
}

.feedback-line {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--ink-secondary);
}

.feedback-line strong {
  color: var(--ink-black);
  font-weight: 700;
}

.full-text-review-card {
  padding: 18px 20px;
  border: 1.5px solid var(--line-correct);
  background: var(--bg-correct);
  border-radius: var(--radius-xs);
  margin-bottom: 16px;
}

.completed-paragraph-text {
  margin: 8px 0 0;
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--ink-black);
}

.cohesion-insight-card {
  padding: 18px 20px;
  border: 1.5px solid var(--academic-gold);
  background: #fbf7ee;
  border-radius: var(--radius-xs);
  margin-bottom: 18px;
}

.cohesion-insight-card p {
  margin: 6px 0 0;
  font-size: 1rem;
  line-height: 1.68;
  color: var(--ink-primary);
}

.blanks-breakdown-section {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.blanks-review-grid {
  display: grid;
  gap: 12px;
}

.blank-feedback-card {
  padding: 16px 18px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-book);
  border-radius: var(--radius-xs);
}

.blank-feedback-card.is-correct-border {
  border-color: var(--line-correct);
  background: #f7fbf8;
}

.blank-feedback-card.is-wrong-border {
  border-color: var(--line-wrong);
  background: #fdf6f6;
}

.blank-feedback-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.blank-badge {
  font-weight: 800;
  font-size: 0.92rem;
  color: var(--ink-black);
}

.badge.status-positive {
  background: var(--bg-correct);
  border-color: var(--line-correct);
  color: var(--ink-correct);
}

.badge.status-negative {
  background: var(--bg-wrong);
  border-color: var(--line-wrong);
  color: var(--ink-wrong);
}

.action-row {
  margin-top: 22px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ==========================================================================
   RESULTS SCREEN
   ========================================================================== */
.results-card {
  display: grid;
  gap: 24px;
}

.results-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.results-section-heading {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink-black);
}

.retry-control-panel {
  display: grid;
  gap: 14px;
  padding: 18px 20px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-sheet);
  border-radius: var(--radius-xs);
}

.retry-control-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.retry-control-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-black);
  min-width: 120px;
}

.mode-btn-group,
.level-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab-btn {
  border: 1.5px solid var(--line-card);
  background: var(--bg-book);
  color: var(--ink-secondary);
  padding: 6px 14px;
  font-size: 0.86rem;
  font-weight: 700;
  border-radius: var(--radius-xs);
  transition: all 120ms ease;
}

.tab-btn:hover {
  border-color: var(--line-strong);
  background: var(--bg-sheet-highlight);
}

.tab-btn.is-active {
  background: var(--ink-black);
  border-color: var(--ink-black);
  color: #ffffff;
}

/* Results Summary Stats */
.results-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.summary-card {
  padding: 18px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-sheet);
  border-radius: var(--radius-xs);
}

.summary-card span {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 6px;
}

.summary-card strong {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--ink-black);
}

/* Official Academic Table */
.topic-summary {
  border: 1.5px solid var(--line-strong);
  overflow-x: auto;
  border-radius: var(--radius-xs);
}

.topic-summary table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
}

.topic-summary th,
.topic-summary td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line-card);
}

.topic-summary th {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--ink-black);
  background: var(--bg-sheet-highlight);
  border-bottom: 2px solid var(--line-strong);
}

.topic-summary tr:last-child td {
  border-bottom: 0;
}

/* Review Cards */
.question-review {
  display: grid;
  gap: 18px;
}

.review-card {
  padding: 22px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-sheet);
  border-radius: var(--radius-xs);
}

.review-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.review-head h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-black);
}

.review-card .question-text {
  margin: 0 0 14px;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--ink-primary);
}

.review-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.review-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.review-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.98rem;
  line-height: 1.58;
  color: var(--ink-secondary);
}

.review-list li strong {
  color: var(--ink-black);
  min-width: 130px;
}

.paragraph-review-card {
  display: grid;
  gap: 16px;
}

.review-passage-box {
  padding: 18px 20px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-sheet-alt);
  border-radius: var(--radius-xs);
}

.review-passage-box p {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.8;
  color: var(--ink-black);
}

.review-blanks-container {
  display: grid;
  gap: 12px;
}

.review-blank-row {
  padding: 14px 16px;
  border: 1.5px solid var(--line-card);
  background: var(--bg-book);
  border-radius: var(--radius-xs);
}

.review-blank-row.is-corr {
  border-color: var(--line-correct);
  background: #f7fbf8;
}

.review-blank-row.is-incorr {
  border-color: var(--line-wrong);
  background: #fdf6f6;
}

.review-blank-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.review-blank-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 6px;
  font-size: 0.94rem;
  color: var(--ink-secondary);
  flex-wrap: wrap;
}

.review-blank-rule,
.review-blank-why {
  margin: 4px 0 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink-secondary);
}

.review-blank-rule strong,
.review-blank-why strong {
  color: var(--ink-black);
}

/* --------------------------------------------------------------------------
   MODALS, LOADERS & UTILITIES
   -------------------------------------------------------------------------- */
.screen {
  display: none;
}

.screen-active {
  display: block;
}

.hidden {
  display: none !important;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 26, 0.6);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 100;
}

.loading-card {
  display: grid;
  justify-items: center;
  gap: 16px;
  min-width: min(100%, 320px);
  padding: 32px 28px;
  border: 2px solid var(--ink-black);
  background: var(--bg-book);
  box-shadow: var(--book-shadow);
  border-radius: var(--radius-xs);
}

.spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid var(--line-card);
  border-top-color: var(--ink-black);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.error-banner {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  max-width: min(94vw, 720px);
  padding: 14px 20px;
  border: 1.5px solid var(--line-wrong);
  background: var(--bg-wrong);
  color: var(--ink-wrong);
  font-weight: 700;
  box-shadow: var(--book-shadow);
  border-radius: var(--radius-xs);
  z-index: 101;
}

/* --------------------------------------------------------------------------
   RESPONSIVE MEDIA QUERIES
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .mode-grid,
  .test-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .level-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .results-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 0 12px;
    margin: 16px auto 32px;
  }

  .running-head-row,
  .test-topbar-content,
  .results-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .academic-masthead {
    margin-bottom: 24px;
    padding-bottom: 24px;
  }

  .landing-layout {
    gap: 24px;
  }

  .test-grid {
    gap: 16px;
  }

  .site-footer-inner {
    flex-direction: column;
    gap: 18px;
  }

  .site-footer-links {
    flex-direction: column;
    gap: 8px;
  }

  .book-card {
    padding: 22px 18px;
  }

  .paragraph-passage-box {
    padding: 18px 16px;
  }

  .level-grid,
  .results-summary {
    grid-template-columns: 1fr;
  }

  .step-list li {
    grid-template-columns: 1fr;
  }

  .action-row {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }
}



/* ---------------------------------------------------------------------------
   WRITING MODE — TASK COMPOSER
   --------------------------------------------------------------------------- */

.writing-task-card {
  padding: 26px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(240, 181, 75, 0.3);
  background: linear-gradient(180deg, rgba(240, 181, 75, 0.09), rgba(255, 255, 255, 0.03));
}

.writing-task-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.writing-badge,
.writing-mode-badge {
  border-color: rgba(240, 181, 75, 0.45);
  background: rgba(240, 181, 75, 0.16);
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.76rem;
}

.writing-title {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 1.6rem;
}

.writing-prompt {
  margin: 0 0 18px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
}

.writing-guidance {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--bg-sheet);
}

.writing-guidance ul {
  margin: 8px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  color: var(--muted);
  line-height: 1.6;
}

.writing-requirements {
  margin: 16px 0 0;
  color: var(--soft);
  font-size: 0.94rem;
}

.writing-composer {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.essay-input {
  width: 100%;
  min-height: 320px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-sheet-alt);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.03rem;
  line-height: 1.8;
  resize: vertical;
}

.essay-input:focus {
  outline: none;
  border-color: rgba(240, 181, 75, 0.55);
  box-shadow: 0 0 0 3px rgba(240, 181, 75, 0.14);
}

.essay-input::placeholder {
  color: var(--soft);
  opacity: 0.7;
}

.essay-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stat-chip {
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-sheet);
  font-size: 0.84rem;
  color: var(--muted);
}

.stat-chip.is-reached {
  border-color: rgba(81, 213, 155, 0.45);
  background: rgba(81, 213, 155, 0.14);
  color: var(--success);
}

.stat-chip.is-pending {
  border-color: rgba(240, 181, 75, 0.4);
  background: rgba(240, 181, 75, 0.12);
  color: var(--accent);
}

.writing-progress {
  margin: 2px 0 0;
}

.writing-note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--soft);
}

/* ---------------------------------------------------------------------------
   WRITING MODE — BAND REPORT
   --------------------------------------------------------------------------- */

.writing-report {
  display: grid;
  gap: 20px;
}

.band-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(71, 209, 168, 0.35);
  background: linear-gradient(135deg, #edf7f1, #fdf6e7);
}

.band-hero-score {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.band-value {
  font-family: var(--serif);
  font-size: 3.6rem;
  line-height: 1;
  color: var(--accent-2);
}

.band-scale {
  font-size: 1.05rem;
  color: var(--soft);
}

.band-hero-copy h3 {
  margin: 4px 0 10px;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.report-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.report-meta-item {
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-sheet);
  font-size: 0.78rem;
  color: var(--muted);
}

.criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.criterion-card {
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--bg-sheet);
}

.criterion-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.criterion-label {
  font-size: 0.9rem;
  color: var(--muted);
}

.criterion-band {
  font-family: var(--serif);
  font-size: 1.7rem;
  color: var(--accent);
}

.criterion-comment {
  margin: 0 0 8px;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text);
}

.criterion-measured {
  margin: 0;
  font-size: 0.78rem;
  color: var(--soft);
}

.report-notes {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(240, 181, 75, 0.35);
  background: #fdf6e7;
}

.report-notes p {
  margin: 0 0 6px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

.report-notes p:last-child {
  margin-bottom: 0;
}

.report-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}

.report-block {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--bg-sheet);
}

.report-block.is-positive {
  border-color: rgba(81, 213, 155, 0.35);
}

.report-block.is-negative {
  border-color: rgba(240, 181, 75, 0.35);
}

.report-block.is-revealed {
  border-color: rgba(71, 209, 168, 0.35);
  background: rgba(71, 209, 168, 0.07);
}

.report-list {
  margin: 10px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  line-height: 1.65;
  color: var(--muted);
}

.report-list strong {
  color: var(--text);
  text-transform: capitalize;
}

.report-empty {
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--soft);
}

.report-subblock {
  margin-top: 18px;
}

.report-subtitle {
  margin: 0 0 8px;
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--soft);
}

.corrections-grid {
  display: grid;
  gap: 12px;
  margin-top: 10px;
}

.correction-card {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--bg-sheet);
}

.correction-original {
  margin: 0 0 6px;
  color: var(--danger);
  text-decoration: line-through;
  text-decoration-color: rgba(255, 107, 107, 0.5);
  line-height: 1.6;
}

.correction-fixed {
  margin: 0 0 6px;
  color: var(--success);
  line-height: 1.6;
}

.correction-why {
  margin: 0;
  font-size: 0.86rem;
  color: var(--soft);
  line-height: 1.6;
}

.upgrade-table {
  width: 100%;
  margin-top: 10px;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.upgrade-table th {
  text-align: left;
  padding: 8px 10px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--soft);
  border-bottom: 1px solid var(--line);
}

.upgrade-table td {
  padding: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--muted);
  vertical-align: top;
}

.upgrade-table td:first-child {
  color: var(--text);
  white-space: nowrap;
}

.upgrade-count {
  color: var(--soft);
  font-size: 0.82rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.metric-chip {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--bg-sheet);
}

.metric-chip span {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--soft);
}

.metric-chip strong {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--text);
}

.word-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.word-chip {
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-sheet);
  font-size: 0.84rem;
  color: var(--muted);
}

.word-chip.is-warning {
  border-color: rgba(240, 181, 75, 0.45);
  background: rgba(240, 181, 75, 0.12);
  color: var(--accent);
}

.word-chip.is-target {
  border-color: rgba(71, 209, 168, 0.45);
  background: rgba(71, 209, 168, 0.12);
  color: var(--accent-2);
}

.submitted-essay {
  margin-top: 10px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.5);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.writing-review-card {
  padding: 0;
  border: none;
  background: none;
}

.mode-card.is-writing {
  border-color: rgba(240, 181, 75, 0.4);
  background: linear-gradient(180deg, rgba(240, 181, 75, 0.08), rgba(255, 255, 255, 0.03));
}

.level-btn.is-writing-btn {
  border-color: rgba(240, 181, 75, 0.35);
}

@media (max-width: 640px) {
  .band-hero {
    gap: 14px;
    padding: 18px;
  }

  .band-value {
    font-size: 2.8rem;
  }

  .essay-input {
    min-height: 260px;
    padding: 14px 16px;
  }

  .upgrade-table td:first-child {
    white-space: normal;
  }
}