:root {
  --ink: #1a1612;
  --ink-soft: #4a433c;
  --paper: #f7f2ea;
  --paper-dark: #ebe3d6;
  --accent: #2d5a47;
  --accent-light: #3d7a5f;
  --accent-pale: #e8f0ec;
  --gold: #b8860b;
  --gold-pale: #faf3e0;
  --coral: #c45c4a;
  --coral-pale: #fceee9;
  --border: #d4cbc0;
  --shadow: 0 4px 24px rgba(26, 22, 18, 0.08);
  --radius: 12px;
  --font-serif: 'Crimson Pro', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(45, 90, 71, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 90%, rgba(184, 134, 11, 0.05) 0%, transparent 50%);
  min-height: 100vh;
}

.app {
  max-width: 780px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.app:has(#view-chapter.view.active) {
  max-width: 980px;
}

.view { display: none; }
.view.active { display: block; }

/* Login */
.login-card {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2.5rem 2rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.login-icon { font-size: 2.5rem; margin-bottom: 1rem; }

.login-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.login-sub {
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.login-input {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  text-align: center;
  letter-spacing: 0.05em;
  transition: border-color 0.15s;
}

.login-input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-input.shake {
  animation: shake 0.4s ease;
  border-color: var(--coral);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.btn-login { width: 100%; justify-content: center; padding: 0.85rem; }

.login-error {
  color: var(--coral);
  font-size: 0.9rem;
  margin: 0;
}

/* App bar */
.app-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  flex-wrap: wrap;
}

.app-bar-home {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0.25rem 0.5rem 0.25rem 0;
  border-radius: 6px;
  flex-shrink: 0;
}

.app-bar-home:hover { background: var(--paper); }

.app-bar-logo { font-size: 1.25rem; }

.app-bar-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ink);
}

.breadcrumb {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  min-width: 0;
  overflow: hidden;
}

.crumb {
  color: var(--ink-soft);
  white-space: nowrap;
}

.crumb.current {
  color: var(--ink);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
}

.crumb-link {
  background: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  color: var(--accent);
  cursor: pointer;
  padding: 0;
}

.crumb-link:hover { text-decoration: underline; }

.crumb-sep { color: var(--border); flex-shrink: 0; }

.app-bar-right {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.app-bar-user {
  font-size: 0.8rem;
  color: var(--ink-soft);
  background: var(--paper-dark);
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-signout {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.65rem;
  font-family: inherit;
  font-size: 0.8rem;
  color: var(--ink-soft);
  cursor: pointer;
}

.btn-signout:hover {
  border-color: var(--coral);
  color: var(--coral);
}

/* Welcome / home */
.welcome-header {
  margin-bottom: 1.5rem;
}

.welcome-header h1 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  margin: 0 0 0.35rem;
}

.welcome-progress {
  color: var(--ink-soft);
  margin: 0;
}

.section-heading {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0 0 0.25rem;
}

.section-sub {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

.steps-overview {
  margin: 0;
  padding-left: 1.25rem;
}

.steps-overview li {
  margin-bottom: 0.35rem;
}

.step-hint {
  color: var(--ink-soft);
  font-size: 0.95rem;
  padding: 0.65rem 0.85rem;
  background: var(--accent-pale);
  border-radius: 8px;
  margin-bottom: 1rem;
}

/* Reading guide */
.book-link-card {
  background: linear-gradient(135deg, var(--accent-pale) 0%, var(--gold-pale) 100%);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  align-items: flex-start;
}

.book-link-card strong {
  color: var(--accent);
  font-size: 0.95rem;
}

.book-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: white;
  color: var(--accent);
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  border: 1px solid var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.book-link-btn:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.guide-summary {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.5;
  padding: 0.85rem 1rem;
  background: var(--paper);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
  margin-bottom: 1.25rem;
}

.guide-characters {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.guide-character {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 0.5rem 0.75rem;
  padding: 0.5rem 0.65rem;
  background: var(--paper);
  border-radius: 6px;
  font-size: 0.9rem;
}

.guide-character-name {
  font-weight: 700;
  color: var(--accent);
}

.guide-character-note {
  color: var(--ink-soft);
  grid-column: 2;
}

@media (max-width: 480px) {
  .guide-character {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
  .guide-character-note { grid-column: 1; }
}

.checkpoint-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  counter-reset: checkpoint;
}

.checkpoint-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--paper-dark);
  font-size: 0.92rem;
  line-height: 1.45;
}

.checkpoint-list li:last-child { border-bottom: none; }

.checkpoint-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 50%;
  margin-top: 0.1rem;
}

.check-yourself {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
}

.check-yourself li {
  margin-bottom: 0.4rem;
  font-size: 0.92rem;
  line-height: 1.45;
}

.guide-big-idea {
  padding: 0.75rem 1rem;
  background: var(--gold-pale);
  border-radius: 8px;
  font-size: 0.92rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.guide-big-idea strong { color: var(--gold); }

/* Fun fact & puzzles */
.fun-fact {
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
  background: var(--gold-pale);
  border-radius: 8px;
  border-left: 3px solid var(--gold);
  font-size: 0.95rem;
  line-height: 1.55;
}

.fun-fact strong { color: var(--gold); }

.puzzle-box {
  margin-top: 1.25rem;
  padding: 1.15rem;
  background: linear-gradient(135deg, var(--accent-pale) 0%, white 100%);
  border: 2px dashed var(--accent);
  border-radius: 10px;
}

.puzzle-box h3 {
  font-family: var(--font-serif);
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
}

.puzzle-scenario {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  line-height: 1.55;
}

.puzzle-options { margin-bottom: 0.85rem; }

.puzzle-result {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.5;
  display: none;
}

.puzzle-result.show { display: block; }
.puzzle-result.pass { background: var(--accent-pale); color: var(--accent); }
.puzzle-result.fail { background: var(--coral-pale); color: var(--coral); }

.submit-notice {
  margin-top: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.5;
  background: var(--accent-pale);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.submit-notice.submitted {
  background: var(--paper-dark);
  color: var(--ink-soft);
  border-color: var(--border);
}

.highlight-missing {
  outline: 3px solid var(--coral) !important;
  outline-offset: 2px;
  animation: missing-pulse 0.6s ease 2;
}

.vocab-select.missing,
.question-block textarea.missing,
.writing-area.missing {
  border-color: var(--coral) !important;
  background: var(--coral-pale);
}

.quiz-question.missing {
  border: 2px solid var(--coral);
  border-radius: 8px;
  padding: 0.65rem;
  background: var(--coral-pale);
}

@keyframes missing-pulse {
  0%, 100% { outline-color: var(--coral); }
  50% { outline-color: transparent; }
}

.puzzle-answer-key {
  font-size: 0.9rem;
  margin: 0;
  color: var(--accent);
}

/* Stepper — vertical sidebar */
.chapter-layout {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.chapter-main {
  min-width: 0;
}

.stepper-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  position: sticky;
  top: 1rem;
}

.stepper {
  display: flex;
  gap: 0.35rem;
}

.step {
  flex: none;
  width: 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 0.85rem;
  background: white;
  border: 2px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  text-align: left;
}

.step:hover { border-color: var(--accent); }

.step.active {
  border-color: var(--accent);
  background: var(--accent-pale);
}

.step-num {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-dark);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.step.active .step-num {
  background: var(--accent);
  color: white;
}

.step-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-soft);
  line-height: 1.25;
}

.step.active .step-label { color: var(--accent); }

.step.step-done .step-num {
  background: var(--accent);
  color: white;
}

.step.step-done:not(.active) {
  border-color: var(--accent);
  background: var(--accent-pale);
}

.step-submit-footer {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--paper-dark);
}

.teacher-in-progress {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin: 0;
  padding: 0.75rem;
  background: var(--gold-pale);
  border-radius: 8px;
}

.btn-complete:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-complete:disabled:hover {
  background: var(--gold);
  transform: none;
}

@media (max-width: 680px) {
  .chapter-layout {
    grid-template-columns: 1fr;
  }

  .stepper-sidebar {
    flex-direction: row;
    overflow-x: auto;
    position: static;
    padding-bottom: 0.25rem;
    -webkit-overflow-scrolling: touch;
  }

  .step {
    flex-direction: column;
    min-width: 72px;
    width: auto;
    flex: 1;
    padding: 0.6rem 0.4rem;
    text-align: center;
  }

  .step-label { font-size: 0.68rem; }
}

/* Step nav */
.step-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
  padding: 1rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.btn-step {
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.btn-step:hover:not(:disabled) { background: var(--accent-light); }

.btn-step:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-step-prev {
  background: white;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-step-prev:hover:not(:disabled) { background: var(--accent-pale); }

.btn-finish-step { background: var(--gold); }
.btn-finish-step:hover { background: #9a7209; }

.step-indicator {
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-align: center;
  flex: 1;
}

/* Chapter cards */
.chapter-card.next-up {
  border-color: var(--gold);
  background: linear-gradient(180deg, var(--gold-pale) 0%, white 100%);
  box-shadow: 0 4px 20px rgba(184, 134, 11, 0.15);
}

.chapter-card.next-up .chapter-card-num {
  background: var(--gold);
  color: white;
}

/* Chapter grid — horizontal row */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.chapter-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
  font-family: inherit;
  width: 100%;
  min-height: 168px;
  position: relative;
  overflow: hidden;
}

.chapter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  opacity: 0.35;
}

.chapter-card.next-up::before,
.chapter-card.done::before {
  opacity: 1;
}

.chapter-card-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.35rem;
  width: 100%;
}

.chapter-card:hover:not(:disabled) {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.chapter-card:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chapter-card.done {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-pale) 0%, white 100%);
}

.chapter-card-eyebrow {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.chapter-card-num {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-dark);
  border-radius: 50%;
  margin: 0.15rem 0 0.35rem;
}

.chapter-card.done .chapter-card-num {
  background: var(--accent);
  color: white;
}

.chapter-card-title {
  font-weight: 600;
  font-family: var(--font-serif);
  font-size: 0.92rem;
  line-height: 1.35;
  color: var(--ink);
  max-width: 100%;
}

.chapter-card-meta {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-top: 0.25rem;
  padding: 0.25rem 0.65rem;
  background: var(--paper);
  border-radius: 999px;
}

.chapter-card.next-up .chapter-card-meta {
  background: white;
  color: var(--gold);
}

.chapter-card.done .chapter-card-meta {
  background: white;
  color: var(--accent);
}

.chapter-card-check {
  color: var(--accent);
  font-size: 1.25rem;
  opacity: 0;
}

.chapter-card.done .chapter-card-check { opacity: 1; }

@media (max-width: 720px) {
  .chapters-grid {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    gap: 0.85rem;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
  }

  .chapter-card {
    min-width: 200px;
    max-width: 220px;
    flex-shrink: 0;
    scroll-snap-align: start;
    min-height: 180px;
  }
}

/* Teacher dashboard */
.teacher-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.teacher-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.teacher-card-info h2 {
  font-family: var(--font-serif);
  margin: 0;
  font-size: 1.35rem;
}

.teacher-card-info p {
  margin: 0.15rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.teacher-progress {
  height: 8px;
  background: var(--paper-dark);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.teacher-progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.teacher-chapters {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.teacher-chapter-block {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--paper);
}

.teacher-chapter-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  background: white;
  border: none;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background 0.15s;
}

.teacher-chapter-toggle:hover { background: var(--accent-pale); }

.toggle-icon {
  flex-shrink: 0;
  width: 1rem;
  color: var(--accent);
  font-size: 0.7rem;
}

.teacher-ch-title {
  flex: 1;
  font-size: 0.95rem;
  min-width: 0;
}

.teacher-ch-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: flex-end;
}

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--paper-dark);
  color: var(--ink-soft);
  white-space: nowrap;
}

.badge-done { background: var(--accent-pale); color: var(--accent); }
.badge-pass { background: var(--accent-pale); color: var(--accent); }
.badge-fail { background: var(--coral-pale); color: var(--coral); }
.badge-empty { background: var(--paper-dark); color: var(--ink-soft); font-style: italic; }

.teacher-review-body {
  padding: 1rem;
  border-top: 1px solid var(--border);
  background: white;
}

.teacher-no-work,
.teacher-empty {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin: 0;
}

.review-section {
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--paper-dark);
}

.review-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0.75rem;
  padding-bottom: 0;
}

.review-section-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  margin: 0 0 0.65rem;
  color: var(--accent);
}

.review-score {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin: 0 0 0.65rem;
}

.review-score.score-pass { color: var(--accent); }
.review-score.score-fail { color: var(--coral); }

.review-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 0.5rem 1rem;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  align-items: start;
}

.review-row.review-correct { background: var(--accent-pale); }
.review-row.review-wrong { background: var(--coral-pale); }
.review-row.review-missing { background: var(--paper); opacity: 0.8; }

.review-label {
  font-weight: 600;
  font-family: var(--font-serif);
}

.review-note {
  grid-column: 1 / -1;
  font-size: 0.8rem;
  color: var(--accent);
  font-style: italic;
}

.review-correct-inline { background: var(--accent-pale); border-color: var(--accent); }
.review-wrong-inline { background: var(--coral-pale); border-color: var(--coral); }

.review-qa {
  margin-bottom: 1rem;
}

.review-qa:last-child { margin-bottom: 0; }

.review-question {
  font-weight: 500;
  font-size: 0.9rem;
  margin: 0 0 0.4rem;
}

.review-prompt {
  margin-bottom: 0.65rem;
  font-size: 0.9rem;
}

.review-quiz-q {
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

.review-quiz-q p { margin: 0 0 0.25rem; }

.btn-open-chapter {
  display: inline-flex;
  margin-top: 0.5rem;
  padding: 0.45rem 0.85rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.8rem;
  color: var(--ink-soft);
  cursor: pointer;
}

.btn-open-chapter:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@media (max-width: 540px) {
  .teacher-chapter-toggle {
    flex-wrap: wrap;
  }
  .teacher-ch-badges {
    width: 100%;
    padding-left: 1.65rem;
    justify-content: flex-start;
  }
  .review-row {
    grid-template-columns: 1fr;
  }
  .review-note { grid-column: 1; }
  .app-bar-user { display: none; }
}

/* Read-only / teacher review */
.readonly-banner {
  background: var(--gold-pale);
  border-left: 3px solid var(--gold);
  padding: 0.5rem 0.85rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

.readonly-answer {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem;
  white-space: pre-wrap;
  line-height: 1.6;
}

.writing-readonly { min-height: 120px; }

.vocab-readonly-answer {
  padding: 0.5rem 0.75rem;
  background: var(--paper);
  border-radius: 8px;
  font-size: 0.9rem;
}

.vocab-readonly-answer.correct { background: var(--accent-pale); }
.vocab-readonly-answer.incorrect { background: var(--coral-pale); }

.question-label { font-weight: 500; margin: 0 0 0.5rem; }

.quiz-score-display { font-size: 1.1rem; margin-bottom: 1rem; }

.quiz-correct-answer {
  font-size: 0.9rem;
  color: var(--accent);
  margin: 0;
}

.prev-score {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

/* Hero */
.hero {
  text-align: center;
  margin-bottom: 2.5rem;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-pale);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  color: var(--ink);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0;
}

/* Cards */
.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.card h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0 0 0.75rem;
}

.card p { margin: 0 0 0.75rem; }
.card p:last-child { margin-bottom: 0; }

.hint {
  font-size: 0.9rem;
  color: var(--ink-soft);
  font-style: italic;
  padding: 0.75rem 1rem;
  background: var(--gold-pale);
  border-radius: 8px;
  border-left: 3px solid var(--gold);
}

/* Student picker */
.student-picker {
  margin-bottom: 2rem;
}

.student-picker h2 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  text-align: center;
  margin: 0 0 1rem;
}

.student-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.student-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 1.25rem;
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  font-family: inherit;
}

.student-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.student-card.selected {
  border-color: var(--accent);
  background: var(--accent-pale);
}

.student-initial {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 50%;
}

.student-name {
  font-weight: 600;
  font-size: 1.1rem;
}

.student-progress {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* Chapter view */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.btn-back {
  background: none;
  border: none;
  color: var(--accent);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.25rem 0;
}

.btn-back:hover { text-decoration: underline; }

.current-student {
  font-size: 0.85rem;
  color: var(--ink-soft);
  background: var(--paper-dark);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
}

.chapter-header {
  margin-bottom: 1.5rem;
}

.chapter-number {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.chapter-header h1 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  margin: 0.25rem 0;
}

.chapter-pages {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin: 0;
}

/* Tabs */
.activity-tabs {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  -webkit-overflow-scrolling: touch;
}

.tab {
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--ink-soft);
  transition: all 0.15s;
}

.tab:hover { border-color: var(--accent); color: var(--accent); }

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.panel { display: none; }
.panel.active { display: block; }

.panel-content {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.panel-content h2 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin: 0 0 1rem;
}

.panel-content h3 {
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--ink);
}

/* Reading guide */
.focus-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.focus-list li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--paper-dark);
  padding-left: 1.5rem;
  position: relative;
}

.focus-list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.65rem;
  top: 0.85rem;
}

.focus-list li:last-child { border-bottom: none; }

/* Vocab */
.vocab-match {
  display: grid;
  gap: 1rem;
}

.vocab-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: center;
}

@media (max-width: 540px) {
  .vocab-item { grid-template-columns: 1fr; }
}

.vocab-word {
  font-weight: 600;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  padding: 0.5rem 0.75rem;
  background: var(--gold-pale);
  border-radius: 8px;
}

.vocab-select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  background: white;
}

.vocab-select.correct { border-color: var(--accent); background: var(--accent-pale); }
.vocab-select.incorrect { border-color: var(--coral); background: var(--coral-pale); }

.vocab-actions { margin-top: 1.25rem; }

/* Comprehension */
.question-block {
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--paper-dark);
}

.question-block:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.question-block label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.question-block textarea {
  width: 100%;
  min-height: 80px;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
}

.question-block textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.saved-note {
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 0.35rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.saved-note.show { opacity: 1; }

/* Writing */
.writing-prompt {
  background: var(--gold-pale);
  border-left: 3px solid var(--gold);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  margin-bottom: 1rem;
}

.writing-prompt p { margin: 0; font-style: italic; }

.writing-area {
  width: 100%;
  min-height: 200px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.7;
  resize: vertical;
}

.writing-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* Quiz */
.quiz-question {
  margin-bottom: 1.5rem;
}

.quiz-question p {
  font-weight: 500;
  margin: 0 0 0.75rem;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}

.quiz-option:hover { background: var(--paper); }

.quiz-option input { accent-color: var(--accent); }

.quiz-option.correct { border-color: var(--accent); background: var(--accent-pale); }
.quiz-option.incorrect { border-color: var(--coral); background: var(--coral-pale); }

.quiz-result {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  font-weight: 500;
  display: none;
}

.quiz-result.show { display: block; }
.quiz-result.pass { background: var(--accent-pale); color: var(--accent); }
.quiz-result.fail { background: var(--coral-pale); color: var(--coral); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.65rem 1.25rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn:hover { background: var(--accent-light); }

.btn-secondary {
  background: white;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-secondary:hover { background: var(--accent-pale); }

/* Chapter footer */
.chapter-footer {
  margin-top: 2rem;
  text-align: center;
}

.btn-complete {
  padding: 0.85rem 2rem;
  background: var(--gold);
  color: white;
  border: none;
  border-radius: 999px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}

.btn-complete:hover { background: #9a7209; transform: scale(1.02); }

.btn-complete.done {
  background: var(--accent);
  cursor: default;
}

.btn-complete.done:hover { transform: none; }

.complete-status {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.pick-student-msg {
  text-align: center;
  padding: 2rem;
  color: var(--ink-soft);
  font-style: italic;
}