/**
 * KOBO E-INK COLOR PAPER DESIGN SYSTEM - FULLSCREEN RESPONSIVE EDITION
 * Pure CSS with zero external frameworks, ultra-fast for Shared Hosting
 */

@import url('https://fonts.googleapis.com/css2?family=Literata:ital,opsz,wght@0,7..72,400;0,7..72,500;0,7..72,600;0,7..72,700;1,7..72,400&family=Plus+Jakarta+Sans:wght@500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Dynamic font scaling */
  --font-base-size: 16px;
  --font-serif: 'Literata', 'Merriweather', 'Georgia', 'Crimson Pro', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* ----------------------------------------------------
     THE 6 AUTHENTIC PRINT INKS OF COLOR E-INK (KOBO)
     ---------------------------------------------------- */
  --ink-black: #181818;          /* 1. Carbon Black - Primary book text & crisp borders */
  --ink-black-muted: #555555;    /* Secondary text / footnote */
  --ink-terracotta: #b83a3a;     /* 2. Terracotta Red - Bookmarks, Errors, "Again" */
  --ink-terracotta-bg: #f9eaea;
  --ink-denim: #2b5786;          /* 3. Denim Blue - Links, B1/B2, Primary nav */
  --ink-denim-bg: #e8eef5;
  --ink-forest: #2d6b49;         /* 4. Forest Green - Mastered, Correct, "Good" */
  --ink-forest-bg: #e8f4ed;
  --ink-ochre: #ba821e;          /* 5. Mustard Ochre - Streak, "Hard", Due cards */
  --ink-ochre-bg: #fbf5e6;
  --ink-plum: #6f4472;           /* 6. Muted Plum - Metacognition, C1/C2, Cognitive */
  --ink-plum-bg: #f6eef7;

  /* Default Theme: Day Book Paper */
  --paper-bg: #f6f4ec;
  --paper-card: #fdfcf8;
  --paper-card-subtle: #eeebd0;
  --paper-card-highlight: #f3efe2;
  --paper-border: #222222;
  --paper-border-light: #ded9cb;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --border-ink: 1.5px solid var(--paper-border);
  --border-ink-thick: 2px solid var(--paper-border);
  --shadow-tactile: 3px 3px 0px var(--paper-border);
  --shadow-tactile-sm: 2px 2px 0px var(--paper-border);
  --shadow-tactile-pressed: 0px 0px 0px var(--paper-border);
}

/* Theme: Sepia Warm Light (ComfortLight PRO) */
[data-theme="sepia"] {
  --paper-bg: #efe6d2;
  --paper-card: #f8f1df;
  --paper-card-subtle: #e5dac2;
  --paper-card-highlight: #ece2cb;
  --paper-border: #2b251d;
  --paper-border-light: #d6caa8;
}

/* Theme: Inverted Night E-Ink */
[data-theme="night"] {
  --paper-bg: #181818;
  --paper-card: #222222;
  --paper-card-subtle: #2d2d2d;
  --paper-card-highlight: #333333;
  --paper-border: #dedad0;
  --paper-border-light: #444444;
  --ink-black: #e7e3d8;
  --ink-black-muted: #a8a49a;
  --ink-terracotta: #e56565;
  --ink-terracotta-bg: #3c1e1e;
  --ink-denim: #6ba0dc;
  --ink-denim-bg: #1a2a3d;
  --ink-forest: #5ec288;
  --ink-forest-bg: #1b3525;
  --ink-ochre: #e2a63d;
  --ink-ochre-bg: #3d2f14;
  --ink-plum: #be7bc5;
  --ink-plum-bg: #391c3d;
  --shadow-tactile: 3px 3px 0px #dedad0;
  --shadow-tactile-sm: 2px 2px 0px #dedad0;
}

/* ----------------------------------------------------
   BASE STYLES & FULLSCREEN LAYOUT
   ---------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html, body {
  width: 100%;
  min-height: 100vh;
  font-size: var(--font-base-size);
  background-color: var(--paper-bg);
  color: var(--ink-black);
  font-family: var(--font-serif);
  line-height: 1.6;
}

body {
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Fullscreen E-Reader App Container */
.kobo-fullscreen-app {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper-bg);
  position: relative;
}

/* Authentic E-Ink Refresh Flash Effect */
.eink-refresh-flash {
  position: fixed;
  inset: 0;
  background-color: #000;
  z-index: 99999;
  pointer-events: none;
  opacity: 0;
}

.eink-refresh-flash.flash-active {
  animation: einkGhostFlash 0.16s cubic-bezier(0, 0, 0.2, 1);
}

@keyframes einkGhostFlash {
  0% { opacity: 0; }
  35% { opacity: 0.96; background: #000; }
  65% { opacity: 0.92; background: #fff; }
  100% { opacity: 0; }
}

/* ----------------------------------------------------
   TOP STATUS BAR (Fullscreen Kobo Header)
   ---------------------------------------------------- */
.kobo-top-statusbar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-black-muted);
  border-bottom: var(--border-ink);
  background-color: var(--paper-card);
  user-select: none;
  position: sticky;
  top: 0;
  z-index: 100;
}

@media (max-width: 768px) {
  .kobo-top-statusbar {
    padding: 8px 12px;
  }
}

.statusbar-left, .statusbar-center, .statusbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kobo-book-title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--ink-black);
}

.kobo-book-badge {
  background-color: var(--ink-denim);
  color: #fff;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.statusbar-btn {
  background: transparent;
  border: 1px solid var(--paper-border-light);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--ink-black);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
}

.statusbar-btn:hover {
  background-color: var(--paper-card-subtle);
  border-color: var(--paper-border);
}

.statusbar-btn:active {
  transform: translateY(1px);
}

/* ----------------------------------------------------
   NAVIGATION BAR (Fullscreen Tab Strips)
   ---------------------------------------------------- */
.kobo-navbar {
  width: 100%;
  display: flex;
  background-color: var(--paper-card-subtle);
  border-bottom: var(--border-ink-thick);
  overflow-x: auto;
  scrollbar-width: none;
  position: sticky;
  top: 45px;
  z-index: 99;
}

.kobo-navbar::-webkit-scrollbar {
  display: none;
}

.kobo-nav-tab {
  flex: 1;
  min-width: 130px;
  text-align: center;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-black-muted);
  cursor: pointer;
  border: none;
  background: transparent;
  border-right: 1px solid var(--paper-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  white-space: nowrap;
  transition: all 0.15s;
}

.kobo-nav-tab:last-child {
  border-right: none;
}

.kobo-nav-tab:hover {
  background-color: var(--paper-card);
  color: var(--ink-black);
}

.kobo-nav-tab.active {
  background-color: var(--paper-bg);
  color: var(--ink-black);
  font-weight: 800;
}

.kobo-nav-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background-color: var(--ink-denim);
}

/* ----------------------------------------------------
   MAIN CONTENT AREA (Fullscreen Reading Canvas)
   ---------------------------------------------------- */
.kobo-main-view {
  flex: 1;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 36px;
  box-sizing: border-box;
}

@media (max-width: 900px) {
  .kobo-main-view {
    padding: 20px 16px;
  }
}

.view-section {
  display: none;
  width: 100%;
}

.view-section.active {
  display: block;
  animation: fadeInView 0.2s ease-out;
}

@keyframes fadeInView {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ----------------------------------------------------
   TYPOGRAPHY & PRINT HEADERS
   ---------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--ink-black);
  line-height: 1.25;
  font-weight: 700;
}

h1 {
  font-size: 1.9rem;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.45rem;
  margin-bottom: 0.4rem;
}

h3 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
}

p {
  margin-bottom: 0.75rem;
  color: var(--ink-black);
}

.text-muted {
  color: var(--ink-black-muted);
}

.serif-italic {
  font-style: italic;
}

.kobo-chapter-header {
  border-bottom: var(--border-ink-thick);
  padding-bottom: 14px;
  margin-bottom: 26px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 14px;
}

.chapter-number {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-denim);
  margin-bottom: 3px;
}

.chapter-subtitle {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--ink-black-muted);
}

/* ----------------------------------------------------
   THE 6 PRINT COLOR BADGES
   ---------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.2;
  border: 1px solid currentColor;
}

.badge-black {
  color: var(--ink-black);
  background-color: var(--paper-card-subtle);
  border-color: var(--paper-border);
}

.badge-terracotta {
  color: var(--ink-terracotta);
  background-color: var(--ink-terracotta-bg);
  border-color: var(--ink-terracotta);
}

.badge-denim {
  color: var(--ink-denim);
  background-color: var(--ink-denim-bg);
  border-color: var(--ink-denim);
}

.badge-forest {
  color: var(--ink-forest);
  background-color: var(--ink-forest-bg);
  border-color: var(--ink-forest);
}

.badge-ochre {
  color: var(--ink-ochre);
  background-color: var(--ink-ochre-bg);
  border-color: var(--ink-ochre);
}

.badge-plum {
  color: var(--ink-plum);
  background-color: var(--ink-plum-bg);
  border-color: var(--ink-plum);
}

/* ----------------------------------------------------
   CARDS & GRIDS (Paper Cards with Tactile Borders)
   ---------------------------------------------------- */
.paper-card {
  background-color: var(--paper-card);
  border: var(--border-ink);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-tactile);
  position: relative;
  transition: transform 0.15s, box-shadow 0.15s;
}

.paper-card-flat {
  background-color: var(--paper-card);
  border: 1px solid var(--paper-border-light);
  border-radius: var(--radius-md);
  padding: 18px;
}

.dashboard-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-black-muted);
  margin-bottom: 4px;
}

.stat-value {
  font-family: var(--font-sans);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--ink-black);
}

.stat-sub {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  margin-top: 4px;
  color: var(--ink-black-muted);
}

/* ----------------------------------------------------
   BUTTONS (Tactile Physical Book Buttons)
   ---------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: var(--border-ink);
  box-shadow: var(--shadow-tactile-sm);
  transition: all 0.1s ease;
  user-select: none;
  background-color: var(--paper-card);
  color: var(--ink-black);
  text-decoration: none;
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-tactile);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: var(--shadow-tactile-pressed);
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

.btn-black {
  background-color: var(--ink-black);
  color: var(--paper-bg);
}

.btn-terracotta {
  background-color: var(--ink-terracotta);
  color: #fff;
  border-color: #8c2525;
}

.btn-denim {
  background-color: var(--ink-denim);
  color: #fff;
  border-color: #1e3f63;
}

.btn-forest {
  background-color: var(--ink-forest);
  color: #fff;
  border-color: #1f4f34;
}

.btn-ochre {
  background-color: var(--ink-ochre);
  color: #fff;
  border-color: #8f6111;
}

.btn-plum {
  background-color: var(--ink-plum);
  color: #fff;
  border-color: #4e2f50;
}

/* ----------------------------------------------------
   RETRIEVAL PRACTICE FLASHCARD COMPONENT
   ---------------------------------------------------- */
.practice-container {
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
}

.practice-card-box {
  background-color: var(--paper-card);
  border: var(--border-ink-thick);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-tactile);
  padding: 32px 38px;
  position: relative;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

@media (max-width: 600px) {
  .practice-card-box {
    padding: 20px 16px;
    min-height: 340px;
  }
}

.card-mode-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed var(--paper-border-light);
  padding-bottom: 14px;
  margin-bottom: 24px;
}

.card-center-prompt {
  text-align: center;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 10px 0 20px 0;
}

.card-target-word {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.card-phonetic {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--ink-denim);
  margin-bottom: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.audio-btn {
  background: transparent;
  border: 1px solid var(--paper-border-light);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--ink-denim);
  text-transform: uppercase;
}

.audio-btn:hover {
  background-color: var(--ink-denim-bg);
}

.card-prompt-question {
  font-size: 1.35rem;
  line-height: 1.5;
  max-width: 720px;
  margin: 0 auto;
}

/* MCQ 4-Option Grid */
.mcq-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 24px;
  width: 100%;
}

@media (max-width: 640px) {
  .mcq-options-grid {
    grid-template-columns: 1fr;
  }
}

.mcq-option-btn {
  background-color: var(--paper-bg);
  border: var(--border-ink);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-tactile-sm);
  transition: all 0.1s;
}

.mcq-option-btn:hover {
  background-color: var(--ink-denim-bg);
  border-color: var(--ink-denim);
}

.mcq-option-btn.selected-correct {
  background-color: var(--ink-forest-bg) !important;
  border-color: var(--ink-forest) !important;
  color: var(--ink-forest) !important;
  font-weight: 700;
}

.mcq-option-btn.selected-wrong {
  background-color: var(--ink-terracotta-bg) !important;
  border-color: var(--ink-terracotta) !important;
  color: var(--ink-terracotta) !important;
  text-decoration: line-through;
}

/* Cloze sentence display */
.cloze-sentence-display {
  font-size: 1.3rem;
  line-height: 1.6;
  font-family: var(--font-serif);
  padding: 18px 24px;
  background-color: var(--paper-bg);
  border-left: 4px solid var(--ink-denim);
  border-radius: var(--radius-sm);
  margin: 18px 0;
  max-width: 740px;
}

/* First letter hint box */
.first-letter-box {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  background-color: var(--paper-card-subtle);
  border: 1px solid var(--paper-border-light);
  border-radius: var(--radius-sm);
  padding: 10px 22px;
  display: inline-block;
  margin: 16px 0;
}

/* Text Recall Input */
.recall-input-group {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  width: 100%;
}

.recall-text-input {
  flex: 1;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  padding: 12px 16px;
  border: var(--border-ink);
  border-radius: var(--radius-sm);
  background-color: var(--paper-bg);
  color: var(--ink-black);
}

.recall-text-input:focus {
  outline: none;
  border-color: var(--ink-denim);
  box-shadow: 0 0 0 2px var(--ink-denim-bg);
}

/* ----------------------------------------------------
   METACOGNITION CONFIDENCE PROMPT
   ---------------------------------------------------- */
.confidence-modal-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(246, 244, 236, 0.96);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 24px;
  border-radius: var(--radius-lg);
  z-index: 50;
  text-align: center;
}

[data-theme="night"] .confidence-modal-overlay {
  background-color: rgba(24, 24, 24, 0.96);
}

.confidence-btn-group {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.confidence-btn {
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  border: var(--border-ink);
  background-color: var(--paper-card);
  color: var(--ink-black);
  box-shadow: var(--shadow-tactile-sm);
  transition: all 0.15s;
}

.confidence-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-tactile);
}

/* ----------------------------------------------------
   SM-2 RATING BAR (The 4 Spaced Repetition Buttons)
   ---------------------------------------------------- */
.sm2-rating-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 26px;
}

@media (max-width: 640px) {
  .sm2-rating-bar {
    grid-template-columns: 1fr 1fr;
  }
}

.sm2-btn {
  padding: 14px 10px;
  border-radius: var(--radius-sm);
  border: var(--border-ink);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-tactile-sm);
  transition: all 0.1s;
}

.sm2-btn .interval-tag {
  font-size: 0.72rem;
  font-weight: 500;
  margin-top: 4px;
  opacity: 0.85;
}

.sm2-btn-again {
  background-color: var(--ink-terracotta-bg);
  color: var(--ink-terracotta);
  border-color: var(--ink-terracotta);
}

.sm2-btn-hard {
  background-color: var(--ink-ochre-bg);
  color: var(--ink-ochre);
  border-color: var(--ink-ochre);
}

.sm2-btn-good {
  background-color: var(--ink-forest-bg);
  color: var(--ink-forest);
  border-color: var(--ink-forest);
}

.sm2-btn-easy {
  background-color: var(--ink-denim-bg);
  color: var(--ink-denim);
  border-color: var(--ink-denim);
}

.sm2-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-tactile);
}

.sm2-btn:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* ----------------------------------------------------
   REVEALED DEFINITION DRAWER
   ---------------------------------------------------- */
.revealed-definition-box {
  background-color: var(--paper-bg);
  border-top: 2px solid var(--paper-border);
  padding: 20px 0 0 0;
  margin-top: 20px;
  animation: slideUpDef 0.2s ease-out;
}

@keyframes slideUpDef {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.definition-row {
  margin-bottom: 12px;
}

.def-pos {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink-denim);
  margin-right: 6px;
  text-transform: lowercase;
}

.def-en {
  font-weight: 600;
  color: var(--ink-black);
}

.def-vi {
  color: var(--ink-plum);
  font-style: italic;
  margin-top: 2px;
}

.def-example {
  margin-top: 6px;
  padding-left: 12px;
  border-left: 2px solid var(--ink-ochre);
  font-size: 0.95rem;
  color: var(--ink-black-muted);
}

/* ----------------------------------------------------
   12 METHODS WORKBENCHES
   ---------------------------------------------------- */
.method-tabs-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.method-tab-chip {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  border: 1px solid var(--paper-border-light);
  background-color: var(--paper-card);
  cursor: pointer;
  color: var(--ink-black-muted);
  transition: all 0.15s;
}

.method-tab-chip:hover {
  border-color: var(--paper-border);
  color: var(--ink-black);
}

.method-tab-chip.active {
  background-color: var(--ink-plum);
  color: #fff;
  border-color: var(--ink-plum);
}

.method-workbench-card {
  background-color: var(--paper-card);
  border: var(--border-ink);
  border-radius: var(--radius-md);
  padding: 26px 30px;
  box-shadow: var(--shadow-tactile);
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--ink-black);
}

.form-input, .form-textarea {
  width: 100%;
  font-family: var(--font-serif);
  font-size: 1rem;
  padding: 12px 14px;
  border: var(--border-ink);
  border-radius: var(--radius-sm);
  background-color: var(--paper-bg);
  color: var(--ink-black);
  line-height: 1.5;
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--ink-denim);
  box-shadow: 0 0 0 2px var(--ink-denim-bg);
}

.ai-feedback-banner {
  margin-top: 22px;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  background-color: var(--ink-plum-bg);
  border: 1px solid var(--ink-plum);
  color: var(--ink-black);
}

/* ----------------------------------------------------
   DICTIONARY BROWSER & SEARCH
   ---------------------------------------------------- */
.dict-search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.search-input-box {
  flex: 1;
  min-width: 260px;
}

.search-input-box input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: var(--border-ink);
  border-radius: var(--radius-sm);
  background-color: var(--paper-bg);
  color: var(--ink-black);
}

.cefr-filter-select {
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  border: var(--border-ink);
  border-radius: var(--radius-sm);
  background-color: var(--paper-bg);
  color: var(--ink-black);
  cursor: pointer;
}

.dict-table-container {
  width: 100%;
  overflow-x: auto;
  border: var(--border-ink);
  border-radius: var(--radius-md);
  background-color: var(--paper-card);
  box-shadow: var(--shadow-tactile);
}

.dict-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.dict-table th {
  background-color: var(--paper-card-subtle);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 14px 16px;
  border-bottom: var(--border-ink);
  text-align: left;
  color: var(--ink-black);
}

.dict-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--paper-border-light);
  vertical-align: top;
}

.dict-table tr:last-child td {
  border-bottom: none;
}

.dict-table tr:hover {
  background-color: var(--paper-card-highlight);
}

/* ----------------------------------------------------
   ERROR BANK LIST
   ---------------------------------------------------- */
.error-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.error-card-item {
  background-color: var(--paper-card);
  border: var(--border-ink);
  border-left: 6px solid var(--ink-terracotta);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  box-shadow: var(--shadow-tactile-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.error-card-item.is-resolved {
  border-left-color: var(--ink-forest);
  opacity: 0.7;
}

/* ----------------------------------------------------
   BOTTOM STATUS BAR (Fullscreen Footer)
   ---------------------------------------------------- */
.kobo-bottom-statusbar {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-black-muted);
  border-top: var(--border-ink);
  background-color: var(--paper-card);
  user-select: none;
  position: sticky;
  bottom: 0;
  z-index: 90;
}

@media (max-width: 768px) {
  .kobo-bottom-statusbar {
    padding: 8px 12px;
  }
}

.progress-track {
  width: 140px;
  height: 6px;
  background-color: var(--paper-card-subtle);
  border: 1px solid var(--paper-border-light);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--ink-denim);
  transition: width 0.3s ease;
}

/* ----------------------------------------------------
   TOAST NOTIFICATION (Paper Notice)
   ---------------------------------------------------- */
.eink-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--ink-black);
  color: var(--paper-bg);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  z-index: 999999;
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all 0.2s ease;
}

.eink-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ----------------------------------------------------
   WORKSPACE CONTROL RIBBON (Multi-User Link & Expiry)
   ---------------------------------------------------- */
.kobo-workspace-ribbon {
  background-color: var(--paper-card);
  border-bottom: var(--border-ink);
  padding: 8px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
}

@media (max-width: 768px) {
  .kobo-workspace-ribbon {
    padding: 8px 12px;
  }
}

.ws-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.ws-title {
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 0.75rem;
  color: var(--ink-black-muted);
}

.ws-slug-container {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.ws-slug-chip {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  background-color: var(--paper-card-subtle);
  border: 1.5px solid var(--paper-border-light);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  color: var(--ink-black);
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease;
}

.ws-slug-chip:hover {
  border-color: var(--ink-denim);
  background-color: var(--ink-denim-bg);
  box-shadow: 1px 1px 0px var(--paper-border);
}

.ws-rename-hint {
  font-size: 0.85rem;
  color: var(--ink-black-muted);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  opacity: 0.65;
  transition: all 0.15s;
  user-select: none;
}

.ws-rename-hint:hover {
  opacity: 1;
  color: var(--ink-denim);
  transform: scale(1.15);
}

/* Inline Double-Click Edit Box */
.ws-inline-edit-box {
  display: inline-flex;
  align-items: center;
  background-color: var(--paper-card);
  border: 2px solid var(--ink-denim);
  border-radius: var(--radius-sm);
  padding: 1px 4px 1px 6px;
  box-shadow: var(--shadow-tactile-sm);
  animation: wsBoxPop 0.15s ease;
}

@keyframes wsBoxPop {
  0% { transform: scale(0.96); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

.ws-inline-edit-box .ws-prefix {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--ink-black-muted);
}

.ws-inline-input {
  border: none;
  background: transparent;
  outline: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink-black);
  width: 120px;
  padding: 2px 4px;
}

.ws-inline-action-btn {
  border: 1px solid var(--paper-border);
  background: var(--paper-card-subtle);
  border-radius: var(--radius-sm);
  padding: 3px 7px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  margin-left: 3px;
  line-height: 1.2;
}

.ws-inline-action-btn.save {
  background-color: var(--ink-forest-bg);
  border-color: var(--ink-forest);
  color: var(--ink-forest);
}

.ws-inline-action-btn.save:hover {
  background-color: var(--ink-forest);
  color: #fff;
}

.ws-inline-action-btn.cancel {
  color: var(--ink-black-muted);
}

.ws-inline-action-btn.cancel:hover {
  background-color: var(--ink-terracotta-bg);
  border-color: var(--ink-terracotta);
  color: var(--ink-terracotta);
}

.ws-btn-copy {
  background-color: transparent;
  border: 1px solid var(--paper-border);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--ink-black);
  transition: all 0.15s;
}

.ws-btn-copy:hover {
  background-color: var(--paper-card-subtle);
}

.ws-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.ws-status-badge.temporary {
  background-color: var(--ink-ochre-bg);
  color: var(--ink-ochre);
  border: 1.5px solid var(--ink-ochre);
}

.ws-status-badge.permanent {
  background-color: var(--ink-forest-bg);
  color: var(--ink-forest);
  border: 1.5px solid var(--ink-forest);
}

.ws-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.kobo-expired-banner {
  background-color: var(--ink-terracotta-bg);
  border-bottom: 2px solid var(--ink-terracotta);
  color: var(--ink-black);
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  line-height: 1.4;
}