:root {
  --bg-main: #0b0f19;
  --bg-surface: #121a2d;
  --bg-card: #18233c;
  --bg-card-hover: #1f2d4d;
  --border-color: rgba(148, 163, 184, 0.14);
  --border-light: rgba(255, 255, 255, 0.08);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #10b981;
  --accent-hover: #059669;
  --accent-glow: rgba(16, 185, 129, 0.35);

  --indigo: #6366f1;
  --indigo-hover: #4f46e5;
  --purple: #8b5cf6;
  --cyan: #06b6d4;
  --amber: #f59e0b;
  --rose: #f43f5e;
  --danger: #ef4444;

  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --shadow-lg: 0 20px 45px -12px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 10px 25px -8px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Inter, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* СЕТКА ПРИЛОЖЕНИЯ */
.app-layout {
  display: grid;
  grid-template-columns: 270px 1fr;
  min-height: 100vh;
}

/* БОКОВАЯ ПАНЕЛЬ */
.sidebar {
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 24px;
  border-bottom: 1px solid var(--border-color);
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #10b981, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.35);
}

.brand-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #ffffff, #a7f3d0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-secondary);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 20px;
  flex: 1;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  text-align: left;
}

.nav-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.nav-btn.active {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  font-weight: 600;
}

.nav-btn.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background-color: var(--accent);
  border-radius: 2px;
}

.nav-icon {
  font-size: 18px;
}

.nav-badge {
  margin-left: auto;
  background-color: var(--accent);
  color: #042f1a;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
}

.nav-badge.muted {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
}

.streak-widget {
  background-color: var(--bg-card);
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.streak-fire {
  font-weight: 700;
  font-size: 14px;
  color: #fbbf24;
  display: flex;
  align-items: center;
  gap: 6px;
}

.streak-goal-text {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.progress-bar-mini {
  height: 5px;
  background-color: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  margin-top: 8px;
  overflow: hidden;
}

.progress-fill-mini {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #34d399);
  transition: width 0.3s ease;
}

.sync-status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #64748b;
}

.sync-dot.online {
  background-color: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* ОСНОВНОЙ КОНТЕНТ */
.main-content {
  padding: 28px 36px;
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
}

/* ВЕРХНЯЯ ПАНЕЛЬ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

#pageTitle {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.profile-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ПЕРЕКЛЮЧАТЕЛЬ ЯЗЫКОВ ПЕРЕВОДА */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  border-radius: var(--radius-md);
}

.lang-label {
  font-size: 12px;
  color: var(--text-muted);
}

.lang-buttons {
  display: flex;
  gap: 4px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  background-color: var(--accent);
  color: #042f1a;
}

/* КНОПКИ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #059669, #047857);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 26px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

/* ВКЛАДКИ */
.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ЗАГОЛОВКИ СЕКЦИЙ */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 32px 0 18px;
  gap: 16px;
  flex-wrap: wrap;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* МЕТРИКИ ДАШБОРДА */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--text-muted);
}

.metric-card.urgent::before { background: linear-gradient(90deg, #ef4444, #f97316); }
.metric-card.info::before { background: linear-gradient(90deg, #38bdf8, #6366f1); }
.metric-card.warning::before { background: linear-gradient(90deg, #f59e0b, #eab308); }
.metric-card.success::before { background: linear-gradient(90deg, #10b981, #34d399); }

.metric-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.metric-value {
  font-size: 32px;
  font-weight: 800;
  margin: 8px 0 4px;
  color: var(--text-primary);
}

.metric-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* СЕТКА КОЛОД */
.decks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.deck-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  position: relative;
}

.deck-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
}

.deck-card-top {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.deck-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.deck-card-header {
  flex: 1;
}

.deck-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.deck-card-level {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  margin-top: 4px;
}

.deck-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 14px 0 18px;
  line-height: 1.45;
}

.deck-card-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

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

.deck-stat-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.deck-stat-lbl {
  font-size: 11px;
  color: var(--text-muted);
}

.deck-card-actions {
  margin-top: 16px;
  display: flex;
  gap: 8px;
}

.deck-card-actions .btn {
  flex: 1;
}

/* ТАБЛИЦА ГЛАГОЛОВ */
.table-filters-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  font-size: 16px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input-wrap input {
  width: 100%;
  padding: 12px 14px 12px 42px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.search-input-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.search-clear-btn {
  position: absolute;
  right: 12px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
}

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

.filter-title {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 600;
  min-width: 110px;
}

.pill-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pill-btn {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.pill-btn:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.pill-btn.active {
  background-color: var(--accent);
  color: #042f1a;
  border-color: var(--accent);
}

/* АЛФАВИТНЫЙ БАР */
.alphabet-bar {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding: 8px 4px 14px;
  margin-bottom: 12px;
  scrollbar-width: thin;
}

.letter-btn {
  min-width: 32px;
  height: 32px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
}

.letter-btn:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.letter-btn.active {
  background-color: var(--indigo);
  color: #ffffff;
  border-color: var(--indigo);
}

/* КАРТОЧКА ТАБЛИЦЫ */
.table-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.table-meta {
  padding: 12px 20px;
  background-color: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-secondary);
}

.table-responsive {
  overflow-x: auto;
  max-height: 65vh;
}

.verbs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.verbs-table th {
  background-color: #0e1627;
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 12px 14px;
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid var(--border-color);
}

.verbs-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
}

.verbs-table tr:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

.verb-v1 {
  font-weight: 700;
  color: #38bdf8;
}

.verb-v2 {
  font-weight: 600;
  color: #34d399;
}

.verb-v3 {
  font-weight: 600;
  color: #a78bfa;
}

.pattern-badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
}

.pattern-badge.AAA { background-color: rgba(6, 182, 212, 0.15); color: #22d3ee; }
.pattern-badge.ABB { background-color: rgba(139, 92, 246, 0.15); color: #c084fc; }
.pattern-badge.ABA { background-color: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.pattern-badge.ABC { background-color: rgba(236, 72, 153, 0.15); color: #f472b6; }

.step-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.step-pill.mastered {
  background-color: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.table-row-actions {
  display: flex;
  gap: 6px;
}

.btn-icon-table {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-icon-table:hover {
  background-color: var(--accent);
  color: #042f1a;
  border-color: var(--accent);
}

/* ВКЛАДКА ТРЕНИРОВКИ (STUDY) */
.study-control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  background-color: var(--bg-surface);
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.study-mode-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.mode-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.mode-chip:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.mode-chip.active {
  background-color: var(--accent);
  color: #042f1a;
  border-color: var(--accent);
}

.study-deck-selector-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}

.form-select {
  padding: 8px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

/* РАБОЧАЯ ОБЛАСТЬ ТРЕНИРОВКИ */
.study-workspace {
  max-width: 760px;
  margin: 0 auto;
}

.study-progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
}

.queue-status {
  font-size: 13px;
  color: var(--text-secondary);
}

.step-ladder-bar {
  display: flex;
  gap: 5px;
}

.step-ladder-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
}

.step-ladder-dot.passed {
  background-color: #34d399;
}

.step-ladder-dot.current {
  background-color: #fbbf24;
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.8);
  transform: scale(1.25);
}

.deck-name-pill {
  font-size: 12px;
  padding: 4px 10px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 20px;
  color: var(--text-muted);
}

/* БОКС КАРТОЧКИ ТРЕНИРОВКИ */
.study-card-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: relative;
  overflow: hidden;
}

.card-step-badge {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
}

/* ГЛАВНЫЙ ГЛАГОЛ */
.card-hero {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 8px 0;
}

.verb-v1-big {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff, #67e8f9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.btn-voice-round {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.btn-voice-round:hover {
  background-color: var(--accent);
  color: #042f1a;
  transform: scale(1.08);
}

/* БЛОК ПЕРЕВОДОВ */
.card-translations-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.trans-line {
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.trans-line.ru { color: #f8fafc; font-weight: 600; }
.trans-line.kz { color: #38bdf8; font-weight: 600; }

.lang-flag {
  font-size: 18px;
}

/* ПОЛЯ ВВОДА ДЛЯ 3 ФОРМ */
.forms-inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-input-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-input-card label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.form-input-card input {
  padding: 14px 16px;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
  outline: none;
  transition: all 0.2s;
}

.form-input-card input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.form-input-card input.correct {
  border-color: #10b981;
  background-color: rgba(16, 185, 129, 0.1);
}

.form-input-card input.wrong {
  border-color: #ef4444;
  background-color: rgba(239, 68, 68, 0.1);
}

.input-feedback {
  font-size: 12px;
  min-height: 18px;
}

/* ОТКРЫТИЕ ОТВЕТА (3 ФОРМЫ) */
.forms-answer-reveal {
  background-color: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.revealed-forms-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.revealed-type {
  font-size: 12px;
  font-weight: 700;
  color: #34d399;
}

.revealed-forms-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  text-align: center;
}

.rf-col {
  background-color: var(--bg-card);
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.rf-label {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.rf-value {
  font-size: 18px;
  font-weight: 800;
  margin-top: 4px;
}

.rf-value.highlight {
  color: #34d399;
}

.revealed-example {
  font-size: 13px;
  color: var(--text-secondary);
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  padding-top: 8px;
}

/* ПАНЕЛЬ РЕЙТИНГА SM-2 */
.sm2-rating-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.rating-btn {
  padding: 14px 10px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.rating-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.rating-btn .btn-top {
  font-size: 14px;
  font-weight: 700;
}

.rating-btn .btn-sub {
  font-size: 11px;
  opacity: 0.8;
}

.rating-btn.again {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #ffffff;
}

.rating-btn.hard {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #ffffff;
}

.rating-btn.good {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #ffffff;
}

.rating-btn.easy {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
}

/* КЛАССИЧЕСКАЯ ФЛЕШКАРТОЧКА */
.flashcard-surface {
  min-height: 260px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
}

.flashcard-surface:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.fc-word {
  font-size: 42px;
  font-weight: 800;
  color: #ffffff;
}

.fc-transcription {
  font-size: 16px;
  color: var(--text-muted);
  margin-top: 4px;
}

.fc-translations {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fc-t-ru { font-size: 18px; font-weight: 700; color: #f8fafc; }
.fc-t-kz { font-size: 16px; font-weight: 600; color: #38bdf8; }

.fc-flip-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 24px;
}

.fc-divider {
  width: 100%;
  height: 1px;
  background-color: var(--border-color);
  margin: 20px 0;
}

.fc-forms-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 16px;
}

.fc-form-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
}

.fc-form-box.highlight {
  border-color: var(--accent);
  background-color: rgba(16, 185, 129, 0.1);
  color: #34d399;
}

.fc-arrow {
  color: var(--text-muted);
  font-size: 18px;
}

/* ТЕСТ (QUIZ) */
.quiz-question-box {
  text-align: center;
  padding: 20px 0;
}

.quiz-prompt {
  font-size: 13px;
  color: var(--text-secondary);
}

.quiz-verb {
  font-size: 40px;
  font-weight: 800;
  color: #ffffff;
  margin: 8px 0;
}

.quiz-forms-sub {
  font-size: 15px;
  color: #34d399;
  font-weight: 600;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.quiz-option-btn {
  padding: 18px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
}

.quiz-option-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.quiz-option-btn.correct {
  background-color: #065f46;
  border-color: #10b981;
  color: #ffffff;
}

.quiz-option-btn.wrong {
  background-color: #881337;
  border-color: #f43f5e;
  color: #ffffff;
}

/* АУДИРОВАНИЕ */
.listen-center {
  display: flex;
  justify-content: center;
  padding: 24px 0;
}

.big-listen-btn {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981, #06b6d4);
  border: none;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4);
  transition: transform 0.2s;
}

.big-listen-btn:hover {
  transform: scale(1.05);
}

.big-listen-btn .big-icon {
  font-size: 42px;
}

.listen-prompt-text {
  text-align: center;
  font-size: 15px;
  color: var(--text-secondary);
}

/* СБОРКА БУКВ (SPELLING) */
.spell-prompt {
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
}

.spell-verb-big {
  text-align: center;
  font-size: 36px;
  font-weight: 800;
  color: #38bdf8;
  margin: 4px 0;
}

.spell-trans-sub {
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
}

.spell-input-display {
  min-height: 56px;
  background-color: var(--bg-card);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 2px;
}

.spell-letter-bank {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 10px;
}

.letter-tile {
  width: 44px;
  height: 48px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: #ffffff;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}

.letter-tile:hover {
  background-color: var(--accent);
  color: #042f1a;
  transform: translateY(-2px);
}

.letter-tile.used {
  opacity: 0.3;
  pointer-events: none;
}

.spell-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* ЗАВЕРШЕНИЕ ОЧЕРЕДИ */
.study-empty-state {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.empty-icon {
  font-size: 60px;
  margin-bottom: 16px;
}

.empty-title {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
}

.empty-desc {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 460px;
  margin: 10px auto 24px;
  line-height: 1.5;
}

.empty-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* 10 СТУПЕНЕЙ */
.ladder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.ladder-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
}

.ladder-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.ladder-step-num {
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
}

.ladder-step-interval {
  font-size: 12px;
  color: var(--text-muted);
}

.ladder-count {
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
}

.ladder-step-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* СТАТИСТИКА */
.stats-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-big-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.stat-big-val {
  font-size: 32px;
  font-weight: 800;
  color: #34d399;
}

.stat-big-title {
  font-size: 14px;
  font-weight: 600;
  margin-top: 6px;
}

.stat-big-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.history-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
}

.history-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 400px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background-color: var(--bg-card);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* СИНХРОНИЗАЦИЯ */
.sync-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.sync-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.sync-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.sync-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 18px;
  line-height: 1.5;
}

.wifi-links-box {
  margin-bottom: 18px;
}

.wifi-link {
  display: block;
  padding: 12px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  color: #34d399;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  word-break: break-all;
}

.wifi-link:hover {
  background-color: rgba(16, 185, 129, 0.15);
}

.qr-placeholder {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  background-color: #ffffff;
  border-radius: var(--radius-md);
  width: 200px;
  height: 200px;
  margin: 0 auto 16px;
}

.pwa-instructions {
  font-size: 12px;
  color: var(--text-secondary);
  background-color: rgba(255, 255, 255, 0.04);
  padding: 12px;
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.input-with-btn {
  display: flex;
  gap: 8px;
}

.input-with-btn input {
  flex: 1;
  padding: 10px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

.input-with-btn input:focus {
  border-color: var(--accent);
}

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

/* МОБИЛЬНАЯ НАВИГАЦИЯ */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  z-index: 100;
  padding: 6px 12px 10px;
  justify-content: space-around;
}

.mobile-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
}

.mobile-nav-btn span:first-child {
  font-size: 20px;
}

.mobile-nav-btn.active {
  color: #34d399;
}

/* ТОСТЫ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
}

.toast {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInToast 0.25s ease-out;
}

@keyframes slideInToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.hidden {
  display: none !important;
}

/* АДАПТИВНОСТЬ */
@media (max-width: 900px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .mobile-bottom-nav {
    display: flex;
  }

  .main-content {
    padding: 16px 16px 80px;
  }

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

  .forms-inputs-grid {
    grid-template-columns: 1fr;
  }

  .sm2-rating-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quiz-options-grid {
    grid-template-columns: 1fr;
  }
}