:root {
  --azure-blue: #0078d4;
  --azure-dark: #004578;
  --azure-light: #deecf9;
  --azure-hover: #005a9e;
  --correct: #107c10;
  --correct-bg: #dff6dd;
  --incorrect: #a80000;
  --incorrect-bg: #fde7e9;
  --neutral-bg: #f3f2f1;
  --text-primary: #201f1e;
  --text-secondary: #605e5c;
  --border: #d2d0ce;
  --white: #ffffff;
  --shadow: 0 2px 8px rgba(0,0,0,0.12);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.16);
  --radius: 4px;
  --radius-lg: 8px;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --azure-blue: #4db6ff;
  --azure-dark: #003a6e;
  --azure-light: #0d2a40;
  --azure-hover: #6bc9ff;
  --correct: #54b054;
  --correct-bg: #0d2e0d;
  --incorrect: #e06060;
  --incorrect-bg: #2e0d0d;
  --neutral-bg: #1e1e1e;
  --text-primary: #f0efee;
  --text-secondary: #a8a6a4;
  --border: #3a3937;
  --white: #252423;
  --shadow: 0 2px 8px rgba(0,0,0,0.5);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.6);
}

[data-theme="dark"] body {
  background: #141414;
}

[data-theme="dark"] header {
  background: #001f3d;
  color: #f0efee;
}

[data-theme="dark"] #score-display,
[data-theme="dark"] .header-right {
  color: #f0efee;
}

[data-theme="dark"] .question-header {
  background: #001f3d;
  color: #f0efee;
}

[data-theme="dark"] .answer-panel {
  background: #1a1a1a;
}

[data-theme="dark"] .option-label:hover:not(.locked) {
  background: #0d2a40;
}

[data-theme="dark"] .review-item-header:hover {
  background: #1e1e1e;
}

[data-theme="dark"] .mode-btn:hover,
[data-theme="dark"] .mode-btn.selected {
  background: #0d2a40;
}

[data-theme="dark"] .domain-btn:hover {
  background: #0d2a40;
}

[data-theme="dark"] .start-card {
  background: #252423;
}

[data-theme="dark"] .results-card {
  background: #252423;
}

[data-theme="dark"] .stat-box {
  background: #1e1e1e;
}

[data-theme="dark"] .review-item {
  background: #252423;
}

[data-theme="dark"] .review-explanation {
  background: #0d2a40;
}

[data-theme="dark"] .progress-bar-container {
  background: #252423;
}

[data-theme="dark"] .question-card {
  background: #252423;
}

[data-theme="dark"] .question-actions {
  background: #1e1e1e;
}

[data-theme="dark"] .btn-secondary {
  background: #252423;
  color: var(--azure-blue);
  border-color: var(--azure-blue);
}

[data-theme="dark"] .btn-secondary:hover {
  background: #0d2a40;
}

[data-theme="dark"] input[type="radio"],
[data-theme="dark"] input[type="checkbox"] {
  accent-color: var(--azure-blue);
}

[data-theme="dark"] .reference-link {
  color: var(--azure-blue);
  border-color: var(--azure-blue);
}

[data-theme="dark"] .reference-link:hover {
  background: #0d2a40;
}

[data-theme="dark"] .filter-btn {
  background: #252423;
  border-color: #3a3937;
  color: var(--text-secondary);
}

[data-theme="dark"] .filter-btn:hover,
[data-theme="dark"] .filter-btn.active {
  background: var(--azure-blue);
  border-color: var(--azure-blue);
  color: #141414;
}

/* theme toggle button */
.theme-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.35);
  color: rgba(255,255,255,0.9);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}

.theme-toggle:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}

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

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f0f0f0;
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
}

/* ── Header ── */
header {
  background: var(--azure-dark);
  color: var(--white);
  padding: 0 24px;
  height: 48px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
  position: sticky;
  top: 0;
  z-index: 100;
}

header .logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

header .logo svg {
  width: 22px;
  height: 22px;
}

header .badge {
  background: var(--azure-blue);
  color: var(--white);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

header .header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.85);
}

#score-display {
  display: none;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--white);
}

#score-display.visible { display: flex; }

/* ── Main Layout ── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

/* ── Screen visibility ── */
.screen { display: none; }
.screen.active { display: block; }

/* ── Start Screen ── */
#start-screen {
  text-align: center;
  padding: 40px 20px;
}

#start-screen h1 {
  font-size: 26px;
  font-weight: 700;
  color: var(--azure-dark);
  margin-bottom: 8px;
}

#start-screen .subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 32px;
}

.start-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 20px;
  text-align: left;
}

.start-card h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.mode-btn {
  border: 2px solid var(--border);
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 16px 12px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
}

.mode-btn:hover {
  border-color: var(--azure-blue);
  background: var(--azure-light);
}

.mode-btn.selected {
  border-color: var(--azure-blue);
  background: var(--azure-light);
  box-shadow: 0 0 0 1px var(--azure-blue);
}

.mode-btn .mode-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.mode-btn .mode-desc {
  font-size: 12px;
  color: var(--text-secondary);
}

.domain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.domain-btn {
  border: 2px solid var(--border);
  background: var(--white);
  border-radius: var(--radius);
  padding: 12px 16px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 12px;
}

.domain-btn:hover {
  border-color: var(--azure-blue);
  background: var(--azure-light);
}

.domain-btn .domain-weight {
  background: var(--azure-blue);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.domain-btn .domain-name {
  font-weight: 600;
  font-size: 13px;
}

.domain-btn .domain-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.start-btn-container {
  margin-top: 24px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--azure-blue);
  color: var(--white);
}

.btn-primary:hover { background: var(--azure-hover); }
.btn-primary:disabled {
  background: var(--border);
  color: var(--text-secondary);
  cursor: not-allowed;
}

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

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

.btn-success {
  background: var(--correct);
  color: var(--white);
}

.btn-success:hover { background: #0b5e0b; }

.btn-lg {
  padding: 12px 28px;
  font-size: 15px;
}

/* ── Exam Screen ── */
#exam-screen {
  display: none;
}

#exam-screen.active {
  display: block;
}

/* Progress */
.progress-bar-container {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.progress-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 130px;
}

.progress-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

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

.progress-track {
  flex: 1;
  height: 8px;
  background: var(--neutral-bg);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--azure-blue);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-pct {
  font-size: 13px;
  font-weight: 700;
  color: var(--azure-blue);
  min-width: 36px;
  text-align: right;
}

/* Question Card */
.question-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.question-header {
  background: var(--azure-dark);
  color: var(--white);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.question-number {
  font-size: 13px;
  font-weight: 600;
  opacity: 0.85;
}

.question-domain {
  font-size: 11px;
  font-weight: 600;
  background: rgba(255,255,255,0.2);
  padding: 2px 8px;
  border-radius: 10px;
}

.question-type-badge {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  background: rgba(255,255,255,0.15);
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.study-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  margin-left: 8px;
  flex-shrink: 0;
  transition: background 0.15s;
  line-height: 1;
}

.study-link-btn:hover {
  background: rgba(255,255,255,0.35);
  color: #fff;
}

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

.question-text {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.subdomain-label {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-style: italic;
}

.multi-answer-instruction {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--azure-blue);
  background: var(--azure-light);
  border: 1px solid var(--azure-blue);
  border-radius: var(--radius);
  padding: 4px 10px;
  margin-bottom: 14px;
}

.option-label.option-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* Answer Options */
.options-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.option-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.option-label:hover:not(.locked) {
  border-color: var(--azure-blue);
  background: var(--azure-light);
}

.option-label input[type="radio"],
.option-label input[type="checkbox"] {
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--azure-blue);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.option-label.locked {
  cursor: default;
}

.option-text {
  font-size: 14px;
  line-height: 1.45;
}

/* Answer state classes */
.option-label.correct-answer {
  border-color: var(--correct);
  background: var(--correct-bg);
}

.option-label.incorrect-answer {
  border-color: var(--incorrect);
  background: var(--incorrect-bg);
}

.option-label.correct-answer .option-text {
  color: var(--correct);
  font-weight: 600;
}

.option-label.incorrect-answer .option-text {
  color: var(--incorrect);
  font-weight: 600;
}

.option-indicator {
  margin-left: auto;
  font-size: 16px;
  flex-shrink: 0;
}

/* Action Buttons */
.question-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  background: var(--neutral-bg);
  flex-wrap: wrap;
}

/* Answer Panel */
.answer-panel {
  display: none;
  border-top: 3px solid var(--azure-blue);
  padding: 20px 24px;
  background: #fafafa;
}

.answer-panel.visible { display: block; }

.answer-panel .result-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-badge.correct {
  background: var(--correct-bg);
  color: var(--correct);
  border: 1px solid var(--correct);
}

.result-badge.incorrect {
  background: var(--incorrect-bg);
  color: var(--incorrect);
  border: 1px solid var(--incorrect);
}

.result-badge.revealed {
  background: var(--azure-light);
  color: var(--azure-dark);
  border: 1px solid var(--azure-blue);
}

.answer-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 14px 0;
}

.why-wrong-title {
  color: var(--incorrect) !important;
}

.why-wrong-text {
  background: var(--incorrect-bg);
  border-left: 3px solid var(--incorrect);
  padding: 10px 14px;
  border-radius: var(--radius);
  color: var(--text-primary);
}

.explanation-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.explanation-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.reference-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--azure-blue);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border: 1px solid var(--azure-blue);
  border-radius: var(--radius);
  transition: all 0.15s;
}

.reference-link:hover {
  background: var(--azure-light);
}

/* ── Results Screen ── */
#results-screen {
  text-align: center;
}

.results-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 36px 32px;
  margin-bottom: 20px;
}

.results-icon {
  font-size: 60px;
  margin-bottom: 12px;
}

.results-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.results-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.score-circle {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 6px solid var(--azure-blue);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
}

.score-circle.pass { border-color: var(--correct); }
.score-circle.fail { border-color: var(--incorrect); }

.score-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.score-denom {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.score-pct {
  font-size: 18px;
  font-weight: 700;
  margin-top: 4px;
}

.score-pct.pass { color: var(--correct); }
.score-pct.fail { color: var(--incorrect); }

.results-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.stat-box {
  background: var(--neutral-bg);
  border-radius: var(--radius);
  padding: 16px 12px;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--azure-dark);
}

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

.domain-breakdown {
  text-align: left;
  margin-bottom: 24px;
}

.domain-breakdown h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 12px;
}

.domain-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.domain-row-name {
  font-size: 13px;
  font-weight: 600;
  min-width: 200px;
  color: var(--text-primary);
}

.domain-row-bar-bg {
  flex: 1;
  height: 10px;
  background: var(--neutral-bg);
  border-radius: 5px;
  overflow: hidden;
}

.domain-row-bar {
  height: 100%;
  border-radius: 5px;
  background: var(--azure-blue);
  transition: width 0.5s ease;
}

.domain-row-bar.pass { background: var(--correct); }
.domain-row-bar.fail { background: var(--incorrect); }

.domain-row-score {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  min-width: 40px;
  text-align: right;
}

.flashcard-summary-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.summary-stat {
  background: var(--neutral-bg);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
}

.summary-stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--azure-dark);
}

.summary-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

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

/* ── Review Screen ── */
#review-screen {
  display: none;
}

#review-screen.active {
  display: block;
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.review-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.review-filters {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--white);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text-secondary);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--azure-blue);
  background: var(--azure-blue);
  color: var(--white);
}

.review-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
  overflow: hidden;
  border-left: 4px solid var(--border);
}

.review-item.correct { border-left-color: var(--correct); }
.review-item.incorrect { border-left-color: var(--incorrect); }
.review-item.skipped { border-left-color: var(--azure-blue); }

.review-item-header {
  padding: 14px 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.1s;
}

.review-item-header:hover { background: var(--neutral-bg); }

.review-status-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.review-question-preview {
  font-size: 13px;
  color: var(--text-primary);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.review-chevron {
  font-size: 11px;
  color: var(--text-secondary);
  transition: transform 0.2s;
}

.review-item.expanded .review-chevron {
  transform: rotate(180deg);
}

.review-item-body {
  display: none;
  padding: 0 18px 18px;
}

.review-item.expanded .review-item-body {
  display: block;
}

.review-question-full {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.review-option {
  padding: 8px 12px;
  border-radius: var(--radius);
  margin-bottom: 6px;
  font-size: 13px;
  border: 1px solid var(--border);
}

.review-option.correct-answer {
  background: var(--correct-bg);
  border-color: var(--correct);
  color: var(--correct);
  font-weight: 600;
}

.review-option.your-incorrect {
  background: var(--incorrect-bg);
  border-color: var(--incorrect);
  color: var(--incorrect);
  font-weight: 600;
}

.review-explanation {
  margin-top: 12px;
  padding: 12px;
  background: var(--azure-light);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
}

.review-ref {
  margin-top: 10px;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text-primary);
  color: var(--white);
  padding: 10px 18px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.25s;
  pointer-events: none;
  z-index: 1000;
}

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

/* ── Flashcard Screen ── */
#flashcard-screen {
  display: none;
  max-width: 800px;
  margin: 0 auto;
}

#flashcard-screen.active {
  display: block;
}

.flashcard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.flashcard-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.flashcard-stats {
  font-size: 13px;
  font-weight: 600;
}

.flashcard-container {
  perspective: 1000px;
  margin-bottom: 24px;
  min-height: 400px;
}

.flashcard {
  position: relative;
  width: 100%;
  min-height: 400px;
  cursor: pointer;
  user-select: none;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 400px;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

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

.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  min-height: 400px;
  backface-visibility: hidden;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
}

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

.flashcard-type-badge {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  background: var(--azure-blue);
  color: var(--white);
  padding: 4px 10px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.flashcard-subdomain {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-style: italic;
}

.flashcard-question {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-primary);
  flex: 1;
  display: flex;
  align-items: center;
  text-align: center;
  justify-content: center;
}

.flashcard-hint {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  font-style: italic;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.flashcard-answer-section {
  margin-bottom: 24px;
}

.flashcard-answer-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.flashcard-answer-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--correct);
  line-height: 1.5;
}

.flashcard-explanation {
  flex: 1;
}

.flashcard-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.flashcard-action-btns {
  display: flex;
  gap: 8px;
}

.btn-outline {
  background: var(--white);
  color: var(--text-primary);
  border: 2px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--azure-blue);
  background: var(--azure-light);
}

#fc-learned-icon {
  font-size: 16px;
  color: #ffa500;
}

/* Dark mode for flashcards */
[data-theme="dark"] .flashcard-front,
[data-theme="dark"] .flashcard-back {
  background: #252423;
}

[data-theme="dark"] .btn-outline {
  background: #252423;
  border-color: #3a3937;
  color: var(--text-primary);
}

[data-theme="dark"] .btn-outline:hover {
  border-color: var(--azure-blue);
  background: #0d2a40;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .results-stats {
    grid-template-columns: 1fr 1fr;
  }

  .domain-row-name {
    min-width: 140px;
    font-size: 11px;
  }

  .progress-bar-container {
    flex-wrap: wrap;
  }

  .question-actions {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .review-filters {
    margin-left: 0;
    margin-top: 8px;
  }

  .review-header {
    flex-wrap: wrap;
  }

  .flashcard-header {
    justify-content: center;
  }

  .flashcard-front,
  .flashcard-back {
    padding: 24px;
  }

  .flashcard-question {
    font-size: 16px;
  }

  .flashcard-actions {
    flex-wrap: wrap;
    justify-content: center;
  }
}