/* ============================================================
   OpenFlashcards – style.css
   ============================================================ */

/* ── Variables ──────────────────────────────────────────────── */
:root {
  --primary: #439b00;
  --primary-dk: #ffffff;
  --primary-hvr: #327400;
  --primary-bg: #439b00;
  --primary-bg-correct: #439b007c;
  --danger: #ff4b4b;
  --danger-dk: #d93636;
  --danger-bg: #ffe0e0;
  --warning: #ffc800;
  --info: #1cb0f6;
  --info-bg: #e8f7fd;
  --surface: #ffffff;
  --surface-2: #f7f7f7;
  --bg: #f0f0f0;
  --border: #e0e0e0;
  --text: #1c1c1c;
  --text-muted: #777;
  --text-faint: #aaa;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, .07);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, .13);
  --transition: .18s ease;
  --nav-h: 62px;
}

[data-theme="dark"] {
  --primary: #439b00;
  --primary-dk: #ffffff;
  --primary-hvr: #327400;
  --primary-bg: #439b00;
  --primary-bg-correct: #439b007c;
  --danger: #ff6b6b;
  --danger-dk: #cc3333;
  --danger-bg: #2d1010;
  --info: #38bdf8;
  --info-bg: #0c2536;
  --surface: #1e1e1e;
  --surface-2: #161616;
  --bg: #121212;
  --border: #333;
  --text: #f0f0f0;
  --text-muted: #999;
  --text-faint: #555;
  --shadow: 0 4px 24px rgba(0, 0, 0, .4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, .6);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

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

img {
  max-width: 100%;
}

/* ── LOGIN ──────────────────────────────────────────────────── */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e9f9d8 0%, #d0f0a8 100%);
  padding: 20px;
}

[data-theme="dark"] .login-screen {
  background: linear-gradient(135deg, #0d1a04 0%, #1a2e06 100%);
}

.login-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 40px 36px 36px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.login-logo {
  font-size: 3rem;
  text-align: center;
  margin-bottom: 8px;
}

.login-title {
  font-size: 1.7rem;
  font-weight: 900;
  text-align: center;
  color: var(--primary);
  margin-bottom: 4px;
}

.login-sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: .92rem;
}

/* ── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: var(--nav-h);
  background: var(--surface);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 8px;
}

.nav-brand {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

.lang-badge {
  font-size: .7rem;
  font-weight: 700;
  background: var(--primary-bg);
  color: var(--primary-dk);
  padding: 2px 8px;
  border-radius: 999px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}

.nav-link {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  font-size: .83rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav-link.active {
  background: var(--primary-bg);
  color: var(--primary-dk);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
  padding: 4px 8px;
}

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-muted);
  transition: background var(--transition);
}

.btn-icon:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* ── PAGE CONTENT ───────────────────────────────────────────── */
.page-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 900;
  margin-bottom: 24px;
}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: scale(.97);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hvr);
  box-shadow: 0 4px 12px rgba(88, 204, 2, .3);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 2px solid var(--border);
}

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

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: var(--danger-dk);
}

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 7px 14px;
  font-size: .82rem;
}

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

/* ── FORMS ──────────────────────────────────────────────────── */
.field-group {
  margin-bottom: 16px;
}

.field-group label {
  display: block;
  font-weight: 600;
  font-size: .88rem;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.field-group input,
.field-group textarea,
.field-group select {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .97rem;
  background: var(--surface-2);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
}

.field-group input:focus,
.field-group textarea:focus,
.field-group select:focus {
  border-color: var(--primary);
}

.field-group textarea {
  resize: vertical;
  min-height: 70px;
}

.required {
  color: var(--danger);
}

.optional {
  color: var(--text-faint);
  font-size: .8em;
}

/* ── CARDS ──────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1.5px solid var(--border);
}

.card+.card {
  margin-top: 16px;
}

/* ── ALERTS ─────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.alert-danger {
  background: var(--danger-bg);
  color: var(--danger-dk);
}

.alert-success {
  background: var(--primary-bg);
  color: var(--primary-dk);
}

.alert-info {
  background: var(--info-bg);
  color: var(--info);
}

.hidden {
  display: none !important;
}

/* ── BADGES ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.badge-noun {
  background: #dbeafe;
  color: #1d4ed8;
}

.badge-verb {
  background: #fef9c3;
  color: #854d0e;
}

.badge-adjective {
  background: #fce7f3;
  color: #9d174d;
}

.badge-adverb {
  background: #d1fae5;
  color: #065f46;
}

.badge-phrase {
  background: #ede9fe;
  color: #5b21b6;
}

.badge-other {
  background: #f0f0f0;
  color: #555555;
}

[data-theme="dark"] .badge-noun {
  background: #1e3a5f;
  color: #93c5fd;
}

[data-theme="dark"] .badge-verb {
  background: #4a3200;
  color: #fde68a;
}

[data-theme="dark"] .badge-adjective {
  background: #500724;
  color: #fbcfe8;
}

[data-theme="dark"] .badge-adverb {
  background: #064e3b;
  color: #6ee7b7;
}

[data-theme="dark"] .badge-phrase {
  background: #2e1065;
  color: #c4b5fd;
}

[data-theme="dark"] .badge-other {
  background: #333333;
  color: #aaaaaa;
}

/* ── HOME / STATS ───────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow);
}

.stat-card-clickable {
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.stat-card-clickable:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
  border-color: var(--primary);
}

.stat-card-clickable:active {
  transform: translateY(0);
  box-shadow: var(--shadow);
}

.stat-number {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
}

.stat-label {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 600;
}

.quick-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

/* ── VOCAB / WORD GRID ──────────────────────────────────────── */
.vocab-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
  align-items: center;
}

.search-input {
  flex: 1;
  min-width: 160px;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  background: var(--surface);
  color: var(--text);
  outline: none;
}

.search-input:focus {
  border-color: var(--primary);
}

.type-filter {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.type-btn {
  padding: 6px 14px;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.type-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.type-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.word-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}

.word-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  border: 1.5px solid var(--border);
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}

.word-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.word-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.word-literal {
  font-size: 1.1rem;
  font-weight: 800;
}

.word-trans {
  color: var(--text-muted);
  font-size: .92rem;
  margin-bottom: 4px;
}

.word-def {
  color: var(--text-faint);
  font-size: .82rem;
  font-style: italic;
}

.word-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.difficulty-bar {
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  margin-top: 10px;
  overflow: hidden;
}

.difficulty-fill {
  height: 100%;
  border-radius: 2px;
  background: var(--primary);
  transition: width .3s;
}

.progress-bar-wrap {
  height: 5px;
  border-radius: 3px;
  background: var(--border);
  margin-top: 10px;
  overflow: hidden;
  cursor: default;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, #2ecc71 100%);
  transition: width .4s ease;
}

.mastered-badge {
  display: inline-block;
  margin-top: 8px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 2px 10px;
  border-radius: 999px;
  background: #1abc9c20;
  border: 1.5px solid #1abc9c;
  color: #1abc9c;
}

/* ── QUIZ / TRAINING ────────────────────────────────────────── */
.score-bar {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 20px;
}

.score-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 1rem;
}

.filter-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 20px;
}

.quiz-card {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-lg);
  border: 1.5px solid var(--border);
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.quiz-card.correct {
  border-color: transparent;
}

.question-word {
  font-size: 2.2rem;
  font-weight: 900;
  margin: 12px 0;
  color: var(--text);
  word-break: break-all;
  overflow-wrap: anywhere;
  width: 100%;
  min-width: 0;
  hyphens: auto;
}

.question-hint {
  color: var(--text-muted);
  font-size: .9rem;
  margin-bottom: 8px;
  font-style: italic;
}

.question-def {
  color: var(--text-faint);
  font-size: .85rem;
  margin-bottom: 16px;
  font-style: italic;
}

.question-instr {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: .92rem;
}

.choices-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
  max-width: 500px;
}

.choice-btn {
  padding: 14px 12px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.choice-btn:hover {
  border-color: var(--primary);
  background: var(--primary-bg);
}

.choice-btn.correct {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary-dk);
}

.choice-btn.wrong {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger-dk);
}

.result-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.result-message {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.result-answer {
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ── PHRASE TRAINING ────────────────────────────────────────── */
.phrase-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  border: 1.5px solid var(--border);
}

.phrase-translation {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* Clickable words in phrase translation */
.phrase-word-clickable {
  cursor: pointer;
  border-bottom: 2px dotted var(--primary);
  padding: 0 1px;
  position: relative;
  transition: color var(--transition);
}

.phrase-word-clickable:hover {
  color: var(--primary);
}

.word-tooltip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--surface);
  font-size: .78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

.word-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--text);
}

.phrase-hint {
  color: var(--text-muted);
  font-size: .88rem;
  margin-bottom: 20px;
  font-style: italic;
}

.answer-zone {
  min-height: 60px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
  background: var(--surface-2);
  transition: border-color var(--transition);
}

.answer-zone.correct {
  border-color: var(--primary);
  background: var(--primary-bg-correct);
}

.answer-zone.wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.answer-zone-placeholder {
  color: var(--text-faint);
  font-style: italic;
  font-size: .9rem;
}

.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.word-token {
  padding: 8px 14px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 1.5rem;
  transition: all var(--transition);
  user-select: none;
}

.word-token:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.word-token.used {
  opacity: .3;
  pointer-events: none;
}

.word-token.in-answer {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary-dk);
}

/* ── WRITING QUIZ ───────────────────────────────────────────── */
.letter-token {
  min-width: 38px;
  /* padding: 8px 10px; */
  text-align: center;
  font-size: 1.5rem !important;
  letter-spacing: .02em;
}

.writing-answer-zone {
  min-height: 56px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
  margin-bottom: 16px;
  background: var(--surface-2);
  transition: border-color var(--transition), background var(--transition);
}

.writing-answer-zone.correct {
  border-color: var(--primary);
  background: var(--primary-bg-correct);
}

.writing-answer-zone.wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
}

/* one group of letter-slots per word segment */
.writing-segment {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
}

/* visible space between segments */
.writing-space-sep {
  display: inline-flex;
  align-items: center;
  width: 18px;
  justify-content: center;
  color: var(--text-faint);
  font-size: .7rem;
  user-select: none;
}

/* individual letter slot (empty or filled) */
.letter-slot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 38px;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 1rem;
  font-weight: 700;
  cursor: default;
  transition: background var(--transition), border-color var(--transition);
}

.letter-slot.filled-slot {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary-dk);
  cursor: pointer;
}

.letter-slot.filled-slot:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger-dk);
}

.phrase-result {
  padding: 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-weight: 700;
}

.phrase-result.correct {
  background: var(--primary-bg);
  color: var(--primary-dk);
}

.phrase-result.wrong {
  background: var(--danger-bg);
  color: var(--danger-dk);
}

.phrase-actions {
  display: flex;
  gap: 10px;
}

/* ── AUTO FLASHCARDS MODE ─────────────────────────────────────── */
.auto-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-lg);
  border: 1.5px solid var(--border);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.auto-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── 3D Flip animation ─────────────────────────── */
.auto-flip-container {
  perspective: 1000px;
  width: 100%;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 8px 0;
}

.auto-flip-inner {
  position: relative;
  width: 100%;
  min-height: 140px;
  transition: transform 0.5s ease;
  transform-style: preserve-3d;
}

.auto-flip-inner.flipped {
  transform: rotateY(180deg);
}

.auto-flip-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 140px;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.auto-flip-back {
  transform: rotateY(180deg);
}

.auto-flip-face .auto-word-display {
  font-size: 2.4rem;
  font-weight: 900;
  margin: 12px 0 8px;
  color: var(--text);
  min-height: 3.2rem;
  word-break: break-all;
  overflow-wrap: anywhere;
  width: 100%;
  min-width: 0;
  hyphens: auto;
}

.auto-flip-back .auto-word-display {
  color: var(--primary);
}

.auto-flip-face .auto-tts-row {
  display: flex;
  gap: 8px;
  justify-content: center;
  min-height: 32px;
  margin-bottom: 4px;
}

/* ── Progress & controls ────────────────────────── */
.auto-progress-container {
  width: 100%;
  max-width: 400px;
  height: 8px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 6px;
  border: 1px solid var(--border);
}

.auto-progress-bar {
  height: 100%;
  background: var(--primary);
  border-radius: 999px;
  transition: width .1s linear;
  width: 100%;
}

.auto-time-label {
  font-size: .85rem;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.auto-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── ADD FORM ───────────────────────────────────────────────── */
.add-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}

.add-tab {
  padding: 10px 18px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  border: none;
  background: none;
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--text-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition), border-color var(--transition);
}

.add-tab:hover {
  color: var(--text);
}

.add-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.type-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.type-selector .type-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
}

.conjugation-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}

.conj-item label {
  font-size: .78rem;
}

.conj-item {
  margin-bottom: 0 !important;
}

/* ── SETTINGS ───────────────────────────────────────────────── */
.settings-section {
  margin-bottom: 32px;
}

.settings-section h2 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.lang-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.lang-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--primary-bg);
  border: 1.5px solid var(--primary);
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 700;
  color: var(--primary-dk);
}

.lang-chip .remove-lang {
  cursor: pointer;
  margin-left: 4px;
  opacity: .6;
}

.lang-chip .remove-lang:hover {
  opacity: 1;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: white;
  top: 3px;
  left: 3px;
  transition: transform var(--transition);
  box-shadow: 0 1px 4px rgba(0, 0, 0, .2);
}

.toggle-switch input:checked+.toggle-slider {
  background: var(--primary);
}

.toggle-switch input:checked+.toggle-slider::before {
  transform: translateX(20px);
}

/* ── ADMIN ──────────────────────────────────────────────────── */
.user-table {
  width: 100%;
  border-collapse: collapse;
}

.user-table th,
.user-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: .9rem;
}

.user-table th {
  font-weight: 700;
  color: var(--text-muted);
  font-size: .8rem;
  text-transform: uppercase;
}

.role-badge {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 700;
}

.role-admin {
  background: #fef9c3;
  color: #854d0e;
}

.role-user {
  background: var(--info-bg);
  color: var(--info);
}

[data-theme="dark"] .role-admin {
  background: #4a3200;
  color: #fde68a;
}

/* ── MODAL ──────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 20px;
}

.modal-card {
  background: var(--surface);
  border-radius: var(--radius);
  width: 100%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
}

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 800;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
}

.modal-body {
  padding: 20px 24px;
}

.modal-footer {
  padding: 0 24px 20px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

@media (max-width: 600px) {
  .modal-footer {
    flex-wrap: wrap;
  }

  .modal-footer .btn-reset-progress {
    width: auto;
    margin-right: 0 !important;
    order: -1;
  }

  .modal-footer .btn-reset-progress .btn-reset-text {
    display: none;
  }
}

/* ── SPINNER ────────────────────────────────────────────────── */
.spinner {
  width: 36px;
  height: 36px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  margin: 0 auto;
}

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

.loading-state {
  text-align: center;
  padding: 40px;
}

.loading-state p {
  color: var(--text-muted);
  margin-top: 12px;
}

/* ── LANG SEARCH ────────────────────────────────────────────── */
.lang-results {
  max-height: 200px;
  overflow-y: auto;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: 4px;
}

.lang-result-item {
  padding: 10px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .92rem;
  transition: background var(--transition);
}

.lang-result-item:hover {
  background: var(--surface-2);
}

.lang-result-item.selected {
  background: var(--primary-bg);
}

.lang-result-item.highlighted {
  background: var(--surface-2);
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

/* ── COMBOBOX WRAPPER ───────────────────────────────────────── */
.combobox-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.combobox-wrap input {
  flex: 1;
  padding-right: 32px !important;
}

.combobox-arrow {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: .7rem;
  color: var(--text-muted);
  transition: transform .2s;
}

.combobox-arrow.open {
  transform: translateY(-50%) rotate(180deg);
}

/* ── ONBOARDING ─────────────────────────────────────────────── */
.onboarding-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.onboarding-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 36px 32px;
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
}

.onboarding-card h2 {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.onboarding-card p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.selected-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 36px;
  margin-bottom: 16px;
}

.selected-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-bg);
  border: 1.5px solid var(--primary);
  color: var(--primary-dk);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 700;
  cursor: pointer;
}

.selected-chip::after {
  content: ' ✕';
  opacity: .6;
}

/* ── TRAIN SETTINGS PANEL (collapsible) ─────────────────────── */
.train-settings-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  padding: 4px 10px;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition);
}

.train-settings-toggle.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.train-settings-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
}

.train-settings-panel.open {
  max-height: 2000px;
}

/* ── CONFETTI CANVAS ──────────────────────────────────────────── */
.confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* ── TRAINING TOGGLE ROW ──────────────────────────────────────── */
.train-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  gap: 12px;
}

.train-toggle-row label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 2px solid var(--border);
    flex-direction: column;
    padding: 10px 16px 16px;
    gap: 4px;
    z-index: 99;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: 10px 14px;
    font-size: .95rem;
  }

  .btn-icon {
    width: 100%;
    justify-content: center;
  }

  .word-grid {
    grid-template-columns: 1fr;
  }

  .choices-grid {
    grid-template-columns: 1fr;
  }

  .question-word {
    font-size: 1.6rem;
  }

  .quiz-card {
    padding: 24px 18px;
  }

  .quiz-card > .next-row {
    order: -1;
    margin-top: 0 !important;
    margin-bottom: 20px;
  }

  .letter-slot {
    min-width: 28px;
    height: 34px;
    font-size: .9rem;
  }

  .writing-segment {
    gap: 3px;
  }

  .writing-answer-zone {
    padding: 8px 12px;
    gap: 3px;
  }

  .page-content {
    padding: 20px 14px 50px;
  }

  .conjugation-grid {
    flex-direction: column;
  }

  .phrase-actions {
    flex-direction: column;
  }

  .user-table th:nth-child(3),
  .user-table td:nth-child(3) {
    display: none;
  }
}

@media (max-width: 400px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .add-tabs {
    gap: 2px;
  }

  .add-tab {
    padding: 8px 10px;
    font-size: .82rem;
  }

  .question-word {
    font-size: 1.3rem;
  }

  .auto-flip-face .auto-word-display {
    font-size: 1.6rem;
  }

  .letter-slot {
    min-width: 24px;
    height: 32px;
    font-size: .85rem;
  }

  .writing-segment {
    gap: 3px;
  }

  .writing-answer-zone {
    padding: 8px 10px;
    gap: 3px;
  }
}

/* ── LABELS ─────────────────────────────────────────────────── */
.label-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--surface-2);
  color: var(--text-muted);
  transition: opacity .15s;
}

.label-chip.active {
  opacity: 1;
}

.label-chip:not(.active) {
  opacity: .65;
}

.label-pick-btn {
  transition: background .15s, opacity .15s;
}

.label-pick-btn:not(.active) {
  opacity: .7;
}
/* ── FOOTER ──────────────────────────────────────────────────── */
.app-footer {
  text-align: center;
  padding: 24px 16px 32px;
  font-size: .72rem;
  color: var(--text-faint);
}

.app-footer a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.app-footer a:hover {
  color: var(--text-muted);
}

/* ── OFFLINE MODE ─────────────────────────────────────────────── */
.sync-offline-btn {
  position: relative;
}

.sync-offline-btn.sync-btn-offline {
  color: var(--text-muted);
  opacity: .7;
}

#syncOfflineBtn {
  font-size: 1.1rem;
  transition: transform .3s ease;
}

#syncOfflineBtn:disabled {
  cursor: wait;
}

.offline-status-box {
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: .875rem;
  line-height: 1.6;
}

.offline-progress-bar-wrap {
  width: 100%;
  height: 6px;
  border-radius: 4px;
  background: var(--border);
  overflow: hidden;
}

.offline-progress-bar {
  height: 100%;
  border-radius: 4px;
  background: var(--primary, #6366f1);
  transition: width .25s ease;
}

/* Offline banner shown at top of page when navigating offline */
.offline-banner {
  position: fixed;
  top: 56px;
  left: 0; right: 0;
  z-index: 200;
  background: var(--surface-2);
  border-bottom: 2px solid var(--warning, #f59e0b);
  color: var(--text-muted);
  font-size: .82rem;
  text-align: center;
  padding: 6px 40px 6px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.offline-banner-close {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  padding: 4px 6px;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.offline-banner-close:hover {
  opacity: 1;
}

@keyframes offlineBannerFadeOut {
  from { opacity: 1; max-height: 60px; }
  to   { opacity: 0; max-height: 0; padding-top: 0; padding-bottom: 0; }
}

.offline-banner-hiding {
  animation: offlineBannerFadeOut 0.4s ease forwards;
  overflow: hidden;
}

/* ── Duplicate comparison grid ─────────────────────────────── */
.dup-grid {
  display: grid;
  grid-template-columns: auto repeat(var(--dup-cols, 2), minmax(100px, 1fr));
  gap: 6px 10px;
  font-size: .8rem;
  min-width: 0;
}

@media (max-width: 900px) {
  .dup-grid {
    grid-template-columns: minmax(min-content, 90px) repeat(var(--dup-cols, 2), minmax(100px, 1fr));
  }
}