:root {
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --border-color: #e2e8f0;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;

  --intro-color: #0d9488;
  --intro-soft: #f0fdfa;
  --inter-color: #4f46e5;
  --inter-soft: #eef2ff;
  --adv-color: #9333ea;
  --adv-soft: #faf5ff;

  --success: #16a34a;
  --success-soft: #f0fdf4;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --danger: #dc2626;
  --danger-soft: #fef2f2;

  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.07);
}

* {
  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-page);
  color: var(--text-main);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88em;
  background: rgba(79, 70, 229, 0.09);
  color: #3730a3;
  padding: 2px 6px;
  border-radius: 4px;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

/* Top Navigation */
.topbar {
  background: #0f172a;
  color: #ffffff;
  border-bottom: 1px solid #1e293b;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-inner {
  max-width: 1220px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #14b8a6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  color: #ffffff;
}

.brand-title {
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 0.7rem;
  background: rgba(99, 102, 241, 0.25);
  border: 1px solid rgba(129, 140, 248, 0.4);
  color: #c7d2fe;
  padding: 1px 6px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.brand-subtitle {
  font-size: 0.76rem;
  color: #94a3b8;
}

.portal-Controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.role-tabs {
  display: flex;
  background: #1e293b;
  padding: 4px;
  border-radius: 10px;
  gap: 4px;
}

.role-tab {
  background: transparent;
  color: #cbd5e1;
  border: none;
  padding: 7px 14px;
  border-radius: 7px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.role-tab:hover {
  color: #ffffff;
}

.role-tab.active {
  background: var(--primary);
  color: #ffffff;
}

.student-selector-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #1e293b;
  padding: 5px 12px;
  border-radius: 9px;
  border: 1px solid #334155;
}

.selector-label {
  font-size: 0.8rem;
  color: #94a3b8;
  font-weight: 500;
}

.student-select {
  background: transparent;
  color: #f8fafc;
  border: none;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

.student-select option {
  background: #0f172a;
  color: #f8fafc;
}

/* Main Container */
.main-container {
  max-width: 1220px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 24px 60px;
  flex: 1;
}

/* Hero Banner */
.hero-banner,
.teacher-header-banner {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.hero-banner code {
  background: rgba(255, 255, 255, 0.15);
  color: #e0e7ff;
}

.eyebrow {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #a5b4fc;
  font-weight: 700;
  margin-bottom: 6px;
}

.hero-info {
  max-width: 660px;
}

.hero-info h1,
.teacher-header-banner h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.hero-desc {
  color: #cbd5e1;
  font-size: 0.94rem;
}

.hero-stats {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.stat-tile {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  padding: 14px 18px;
  min-width: 135px;
}

.stat-tile-label {
  font-size: 0.75rem;
  color: #c7d2fe;
  margin-bottom: 4px;
}

.stat-tile-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
}

.stat-tile-sub {
  font-size: 0.72rem;
  color: #94a3b8;
  margin-top: 2px;
}

/* Section Headers */
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
  flex-wrap: wrap;
}

.section-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.section-hint {
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* Pool Cards Grid */
.pools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 22px;
  margin-bottom: 28px;
}

.pool-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pool-card:hover {
  box-shadow: var(--shadow-md);
}

.pool-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.level-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 99px;
  margin-bottom: 6px;
}

.level-introductory {
  background: var(--intro-soft);
  color: var(--intro-color);
}

.level-intermediate {
  background: var(--inter-soft);
  color: var(--inter-color);
}

.level-advanced {
  background: var(--adv-soft);
  color: var(--adv-color);
}

.pool-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.pool-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.pool-progress-box {
  background: var(--bg-subtle);
  padding: 14px;
  border-radius: var(--radius-md);
}

.progress-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.progress-pct {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--primary);
}

.progress-track {
  width: 100%;
  height: 10px;
  background: #cbd5e1;
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #4f46e5, #0d9488);
  border-radius: 99px;
  transition: width 0.3s ease;
}

.subpool-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.subpool-pill {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 10px;
  text-align: center;
}

.subpool-pill-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
}

.subpool-pill-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Learning Rate Box (Requirement 14) */
.learning-rate-box {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  background: #fafaf9;
}

.lr-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.84rem;
  font-weight: 600;
}

.lr-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lr-slider {
  flex: 1;
  width: 100%;
  accent-color: var(--primary);
  cursor: pointer;
}

.lr-Labels-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.dont-recall-btn {
  width: 100%;
  text-align: center;
  background: #f8fafc;
  border: 1px dashed #94a3b8;
  color: var(--text-secondary);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  margin-bottom: 20px;
}

.dont-recall-btn:hover:not(:disabled) {
  background: #fffbeb;
  border-color: var(--warning);
  color: #92400e;
}

.clickable-row {
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.clickable-row:hover td {
  background-color: var(--primary-soft) !important;
}

/* Homework & Countdown Timer Styles */
.homework-dashboard-section {
  margin-bottom: 28px;
}

.hw-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 16px;
}

.hw-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 5px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hw-card.hw-completed {
  border-left-color: var(--success);
  background: #fcfdfc;
}

.hw-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 99px;
  font-size: 0.73rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hw-status-pending {
  background: #f1f5f9;
  color: #475569;
}

.hw-status-in_progress {
  background: #eef2ff;
  color: #4f46e5;
}

.hw-status-completed {
  background: var(--success-soft);
  color: var(--success);
}

.timer-widget {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  padding: 8px 14px;
  border-radius: 10px;
}

.timer-widget.timer-paused {
  background: var(--warning-soft);
  border-color: #fde68a;
  color: #92400e;
}

.timer-widget.timer-done {
  background: var(--success-soft);
  border-color: #86efac;
  color: #14532d;
}

.timer-clock {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
}

.timer-widget.timer-paused .timer-clock {
  color: var(--warning);
}

.timer-widget.timer-done .timer-clock {
  color: var(--success);
}

.timer-alert-banner {
  border-radius: var(--radius-md);
  padding: 13px 20px;
  margin-bottom: 18px;
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.timer-alert-paused {
  background: #fffbeb;
  border: 1px solid #fcd34d;
  color: #92400e;
}

.timer-alert-completed {
  background: var(--success-soft);
  border: 1px solid #86efac;
  color: #14532d;
}

.preset-pills {
  display: flex;
  gap: 4px;
}

.preset-pill {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 5px 9px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
}

.preset-pill.active,
.preset-pill:hover {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.filter-select {
  padding: 7px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.85rem;
  background: #ffffff;
  color: var(--text-main);
  font-weight: 600;
}

/* Teacher Homework & Inactivity Policy Layout (Non-overlapping Grid) */
.hw-management-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
  align-items: stretch;
}

@media (max-width: 980px) {
  .hw-management-grid {
    grid-template-columns: 1fr;
  }
}

.hw-config-card,
.hw-policy-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.hw-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px 18px;
  margin-top: 8px;
}

.hw-form-grid .form-group {
  min-width: 0;
}

.hw-form-grid input,
.hw-form-grid select {
  width: 100%;
}

.searchable-student-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.student-search-input {
  padding: 7px 11px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 0.85rem;
  background: #f8fafc;
}

.student-search-input:focus {
  outline: none;
  border-color: var(--primary);
  background: #ffffff;
}

.field-helper-text {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.hw-form-submit-row {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.policy-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.policy-checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 0.84rem;
  color: var(--text-main);
  cursor: pointer;
  line-height: 1.4;
}

.policy-checkbox-row input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Pop-up Modal Sub-Window for Student Detailed Progress */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.58);
  backdrop-filter: blur(2px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-window {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.25);
  width: 100%;
  max-width: 980px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.modal-header {
  padding: 20px 26px;
  border-bottom: 1px solid var(--border-color);
  background: #f8fafc;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.modal-close-btn {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: #ffffff;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.modal-close-btn:hover {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: #fca5a5;
}

.modal-body {
  padding: 24px 26px;
  overflow-y: auto;
  flex: 1;
}

.pool-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

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

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-color);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 7px 10px;
}

.btn-ghost:hover {
  color: var(--danger);
  background: var(--danger-soft);
}

.btn-lg {
  padding: 12px 22px;
  font-size: 0.96rem;
}

.flex-1 {
  flex: 1;
}

/* Active Practice Session View */
.practice-topbar {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px 22px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.practice-pool-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 280px;
}

.practice-progress-wrap {
  flex: 1;
  max-width: 420px;
}

.practice-stats-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.stat-chip {
  background: var(--bg-subtle);
  padding: 5px 10px;
  border-radius: 7px;
  font-weight: 600;
}

/* Study Mode & Test Mode Cards */
.practice-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.mode-banner {
  padding: 12px 26px;
  font-size: 0.83rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.mode-banner-study {
  background: #eef2ff;
  color: #3730a3;
  border-bottom: 1px solid #c7d2fe;
}

.mode-banner-remedial {
  background: #fffbeb;
  color: #92400e;
  border-bottom: 1px solid #fde68a;
}

.mode-banner-test {
  background: #f0fdfa;
  color: #115e59;
  border-bottom: 1px solid #99f6e4;
}

.card-body {
  padding: 30px 32px;
}

/* Word Hero in Study Mode */
.word-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.word-display-title {
  font-size: 2.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.pronunciation-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.pronunciation-pill {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: 6px;
}

.ipa-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-family: serif;
}

.audio-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-main);
}

.audio-btn:hover {
  background: #e2e8f0;
}

.word-mastery-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 16px;
  min-width: 240px;
  font-size: 0.82rem;
}

.word-mastery-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
}

/* Morphological Root / Prefix / Suffix Decomposition */
.morphology-section {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
}

.section-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 12px;
}

.morpheme-blocks {
  display: flex;
  align-items: stretch;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.morpheme-card {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-top: 3px solid var(--primary);
  border-radius: 8px;
  padding: 10px 16px;
  min-width: 145px;
}

.morpheme-type {
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.morpheme-part {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
  margin: 2px 0;
}

.morpheme-meaning {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.morpheme-plus {
  display: flex;
  align-items: center;
  font-weight: 800;
  color: var(--text-muted);
  font-size: 1.2rem;
}

.etymology-summary-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.related-words-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.82rem;
}

.related-word-tag {
  background: #e0e7ff;
  color: #3730a3;
  padding: 2px 9px;
  border-radius: 99px;
  font-weight: 600;
}

/* Definitions & Examples */
.definitions-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 24px;
}

.definition-card {
  border-left: 4px solid var(--primary);
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  border-radius: 0 10px 10px 0;
  padding: 16px 20px;
}

.pos-badge {
  display: inline-block;
  background: #0f172a;
  color: #ffffff;
  font-size: 0.73rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.definition-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 12px;
}

.examples-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.examples-list li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  padding: 8px 12px;
  border-radius: 6px;
  font-style: italic;
}

.memory-hook-box {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 24px;
  font-size: 0.92rem;
  color: #92400e;
}

/* Test Mode Multiple Choice */
.test-prompt-box {
  background: var(--bg-subtle);
  border-radius: 12px;
  padding: 22px;
  margin-bottom: 22px;
}

.question-style-tag {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--intro-color);
  background: var(--intro-soft);
  padding: 3px 9px;
  border-radius: 99px;
  margin-bottom: 10px;
}

.test-prompt-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.choices-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.choice-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  background: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 0.96rem;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.choice-letter {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: var(--bg-subtle);
  color: var(--text-main);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.choice-btn.correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.choice-btn.correct .choice-letter {
  background: var(--success);
  color: #ffffff;
}

.choice-btn.incorrect {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.choice-btn.incorrect .choice-letter {
  background: var(--danger);
  color: #ffffff;
}

.feedback-panel {
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 22px;
}

.feedback-correct {
  background: var(--success-soft);
  border: 1px solid #86efac;
  color: #14532d;
}

.feedback-incorrect {
  background: var(--danger-soft);
  border: 1px solid #fca5a5;
  color: #7f1d1d;
}

.card-footer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  gap: 12px;
  flex-wrap: wrap;
}

/* Inspector & Tables */
.card-surface {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.inspector-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
  box-shadow: var(--shadow-md);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: var(--bg-subtle);
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table tr:hover td {
  background: #f8fafc;
}

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 0.74rem;
  font-weight: 700;
}

.status-studied {
  background: var(--success-soft);
  color: var(--success);
}

.status-unstudied {
  background: var(--bg-subtle);
  color: var(--text-muted);
}

/* Teacher Portal Specifics */
.teacher-nav-pills {
  display: flex;
  gap: 8px;
  background: rgba(15, 23, 42, 0.35);
  padding: 5px;
  border-radius: 10px;
}

.teacher-subtab {
  background: transparent;
  color: #e2e8f0;
  border: none;
  padding: 9px 16px;
  border-radius: 7px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.teacher-subtab.active {
  background: #ffffff;
  color: #1e1b4b;
}

.add-student-form {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
}

.form-row {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-top: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  min-width: 180px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group input,
.form-group select {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 7px;
  font-size: 0.9rem;
}

.form-actions {
  display: flex;
  gap: 8px;
}

/* Lexicographical Vocab List */
.vocab-filter-bar {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.pool-filter-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-pill {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
}

.filter-pill.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.vocab-search-input {
  padding: 8px 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 280px;
  font-size: 0.88rem;
}

.vocab-count-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 600;
}

.lex-vocab-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 14px;
}

.lex-word-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px 18px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lex-word-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.lex-word-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.lex-word-title {
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--primary);
}

.lex-word-def {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.lex-word-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 6px;
  border-top: 1px dashed var(--border-color);
}

/* Footer */
.app-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1220px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============================================================================
   AUTHENTICATION, PASSWORD RECOVERY & CONFIRMATION MODAL STYLES
   ============================================================================ */
.auth-user-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-role-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid #c7d2fe;
  padding: 5px 12px;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 700;
}

.auth-card-wrapper {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px 0 48px;
}

.auth-card {
  width: 100%;
  max-width: 490px;
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  margin-bottom: 20px;
}

.auth-header h1 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 4px 0 6px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  background: var(--bg-subtle);
  padding: 5px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.auth-tab {
  border: none;
  background: transparent;
  padding: 9px 14px;
  border-radius: 7px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.auth-tab.active {
  background: #ffffff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.auth-form,
.auth-subform {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-alert {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  line-height: 1.45;
  margin-bottom: 16px;
  font-weight: 600;
}

.auth-alert.error {
  background: var(--danger-soft);
  color: #991b1b;
  border: 1px solid #fecaca;
}

.auth-alert.success {
  background: var(--success-soft);
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.auth-alert.info {
  background: var(--primary-soft);
  color: #1e1b4b;
  border: 1px solid #c7d2fe;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}

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

.demo-credentials-box {
  margin-top: 8px;
  padding: 12px 14px;
  background: #f8fafc;
  border: 1px dashed var(--border-color);
  border-radius: 10px;
}

.demo-credentials-title {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.demo-credentials-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Confirmation Modal Styles */
.confirm-modal-overlay {
  z-index: 220;
}

.confirm-modal-window {
  max-width: 460px;
  max-height: none;
}

.confirm-modal-icon {
  font-size: 1.3rem;
}

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

.confirm-modal-message {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 22px;
}

.confirm-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

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

.btn-danger:hover {
  background: #b91c1c;
}