/* CSS Variables */
:root {
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --card: #f9fafb;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --primary: #2563eb;
  --muted: #6b7280;
  --success: #16a34a;
  --error: #dc2626;
  --text-secondary: #6b7280;
  --text-primary: #0f172a;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --border-card: #e2e8f0;
  --chevron: #94a3b8;
  --tile-foundation-bg: #eff6ff;
  --tile-foundation-color: #2563eb;
  --tile-quant-bg: #ecfeff;
  --tile-quant-color: #0891b2;
  --tile-markets-bg: #fff7ed;
  --tile-markets-color: #ea580c;
  --tile-valuation-bg: #ecfdf5;
  --tile-valuation-color: #059669;
  --tile-premium-bg: #ecfdf5;
  --tile-premium-color: #059669;
  --tile-neutral-bg: #f1f5f9;
  --tile-neutral-color: #475569;
  --tile-locked-bg: #f8fafc;
  --tile-locked-color: #94a3b8;
  --radius: 12px;
  --shadow: 0 4px 12px rgba(0,0,0,0.06);
  --border: #e5e7eb;
  --border-light: #d1d5db;

  --tg-safe-top: 0px;
  --tg-safe-right: 0px;
  --tg-safe-bottom: 0px;
  --tg-safe-left: 0px;
  --tg-content-safe-top: 0px;
  --tg-content-safe-right: 0px;
  --tg-content-safe-bottom: 0px;
  --tg-content-safe-left: 0px;

  --app-safe-top: max(env(safe-area-inset-top, 0px), var(--tg-safe-top), var(--tg-content-safe-top));
  --app-safe-right: max(env(safe-area-inset-right, 0px), var(--tg-safe-right), var(--tg-content-safe-right));
  --app-safe-bottom: max(env(safe-area-inset-bottom, 0px), var(--tg-safe-bottom), var(--tg-content-safe-bottom));
  --app-safe-left: max(env(safe-area-inset-left, 0px), var(--tg-safe-left), var(--tg-content-safe-left));

  --tg-overlay-top-reserve: 0px;
  --tg-overlay-left-reserve: 0px;
  --tg-overlay-right-reserve: 0px;
  --app-header-top-offset: calc(var(--app-safe-top) + var(--tg-overlay-top-reserve));
  --app-header-side-offset-left: max(var(--app-safe-left), var(--tg-overlay-left-reserve));
  --app-header-side-offset-right: max(var(--app-safe-right), var(--tg-overlay-right-reserve));
}

/* Telegram Mini App: fixed status bar + horizontal reserve for native Close/Menu */
html.is-telegram-webapp,
html.is-telegram-fullscreen,
body.is-telegram-webapp,
body.is-telegram-fullscreen {
  --tg-status-bar-bg: #0f172a;
  --tg-status-bar-scale: 1.12;
  --tg-status-bar-base: max(env(safe-area-inset-top, 0px), var(--app-safe-top), 44px);
  --tg-status-bar-height: calc(var(--tg-status-bar-base) * var(--tg-status-bar-scale));
  --tg-overlay-top-reserve: 0px;
  --tg-overlay-left-reserve: 120px;
  --tg-overlay-right-reserve: 56px;
}

.tg-status-bar {
  display: none;
}

html.is-telegram-webapp .tg-status-bar,
body.is-telegram-webapp .tg-status-bar {
  display: block;
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: var(--tg-status-bar-height);
  background: var(--tg-status-bar-bg);
  pointer-events: none;
  z-index: 10000;
}

html.is-telegram-webapp .frame > .header,
body.is-telegram-webapp .frame > .header {
  margin-bottom: 12px;
  padding-top: 0;
  padding-left: var(--tg-overlay-left-reserve);
  padding-right: var(--tg-overlay-right-reserve);
  min-height: 0;
  align-items: flex-start;
}

html.is-telegram-webapp .frame > .header .brand,
html.is-telegram-webapp .frame > .header .brand-container,
body.is-telegram-webapp .frame > .header .brand,
body.is-telegram-webapp .frame > .header .brand-container {
  line-height: 1.25;
  max-width: 100%;
}

html.is-telegram-webapp #f-question .question-header,
body.is-telegram-webapp #f-question .question-header {
  padding-top: 10px;
  padding-left: max(14px, var(--tg-overlay-left-reserve));
  padding-right: max(14px, var(--tg-overlay-right-reserve));
}

html.is-telegram-webapp #f-question .question-header__progress,
body.is-telegram-webapp #f-question .question-header__progress {
  width: 100%;
  margin: 0;
}

/* Reset and Base Styles */
* { 
  box-sizing: border-box; 
}

html {
  min-height: 100vh;
  min-height: 100dvh;
}

body { 
  margin: 0; 
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; 
  background: var(--bg); 
  color: #111827; 
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
}

/* Layout */
.container { 
  max-width: 480px; 
  margin: 0 auto; 
  overflow-x: hidden;
}

.container.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  box-sizing: border-box;
  padding-top: calc(12px + var(--app-header-top-offset));
  padding-right: max(12px, var(--app-header-side-offset-right));
  padding-bottom: calc(var(--app-safe-bottom) + 12px);
  padding-left: max(12px, var(--app-header-side-offset-left));
}

.frame { 
  display: none; 
  background: var(--card); 
  border-radius: var(--radius); 
  padding: 20px; 
  margin-bottom: 20px; 
  box-shadow: var(--shadow); 
}

.frame.active { 
  display: block; 
}

/* Typography */
.brand { 
  font-weight: 800; 
  color: var(--accent); 
  font-size: 18px; 
}

.brand-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.main-title {
  margin: 0 0 16px 0;
  font-size: 24px;
  font-weight: 700;
  color: #111827;
}

.main-description {
  margin: 0 0 24px 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.section-title {
  margin: 0 0 16px 0;
  font-size: 20px;
  font-weight: 600;
  color: #111827;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 8px;
}

.sub { 
  color: var(--muted); 
  font-size: 13px; 
}

.small { 
  font-size: 13px; 
  color: var(--muted); 
}

.code { 
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace; 
  font-size: 12px; 
  background: #f3f4f6; 
  padding: 8px; 
  border-radius: 8px; 
  border: 1px solid var(--border); 
}

/* Components */
.header { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  margin-bottom: 16px; 
}

.question-nav-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.card { 
  background: #ffffff; 
  border: 1px solid var(--border); 
  padding: 14px; 
  border-radius: var(--radius); 
}

.btn { 
  background: var(--accent); 
  color: white; 
  border: none; 
  padding: 10px 16px; 
  border-radius: var(--radius); 
  font-weight: 600; 
  cursor: pointer; 
  transition: background-color 0.2s ease;
  font-size: 14px;
}

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

.btn:disabled {
  background: var(--muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.btn.ghost { 
  background: transparent; 
  border: 1px solid var(--accent); 
  color: var(--accent); 
}

.btn.ghost:hover {
  background: var(--accent);
  color: white;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

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

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

.btn-secondary:hover:not(:disabled),
.btn.secondary:hover:not(:disabled) {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn-secondary:focus-visible,
.btn.secondary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-danger {
  background: var(--surface);
  color: var(--error);
  border: 1px solid #fecaca;
}

.btn-danger:hover:not(:disabled) {
  background: #fef2f2;
  border-color: #fca5a5;
}

.btn-compact {
  min-height: 40px;
  padding: 8px 12px;
  font-size: 13px;
}

.btn-primary:disabled,
.btn.btn-primary:disabled {
  background: #e5e7eb;
  color: #9ca3af;
  border-color: #e5e7eb;
  box-shadow: none;
  opacity: 1;
  cursor: not-allowed;
}

.btn.btn-disabled {
  background: #e5e7eb;
  color: #6b7280;
  cursor: not-allowed;
  opacity: 1;
  border: 1px solid #d1d5db;
  position: relative;
}

.btn.btn-disabled:hover {
  background: #e5e7eb;
  color: #6b7280;
}

.btn.btn-disabled::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.05) 2px,
    rgba(0, 0, 0, 0.05) 4px
  );
  pointer-events: none;
}

/* Button Layouts */
.level-buttons {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.onboarding-form {
  margin-top: 20px;
  display: grid;
  gap: 14px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  color: #374151;
  font-size: 13px;
  font-weight: 700;
}

.form-control {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  background: #ffffff;
  color: #111827;
  font: inherit;
  padding: 10px 12px;
}

textarea.form-control {
  min-height: 88px;
  resize: vertical;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
  outline: none;
}

.startup-status {
  margin: 18px 0 4px;
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  background: #eff6ff;
  color: #1e40af;
  font-size: 13px;
  font-weight: 600;
}

.startup-status-error {
  border-color: #fecaca;
  background: #fef2f2;
  color: var(--error);
}

.startup-status-ready {
  display: none;
}

.startup-spinner {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  border: 2px solid rgba(37, 99, 235, 0.22);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.startup-status-error .startup-spinner {
  display: none;
}

.home-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.home-section__head {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.home-section__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
}

.home-section__desc {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.45;
}

.category-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-card-grid {
  margin-top: 4px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.study-profile-card,
.profile-study-card {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-top: 16px;
}

.study-profile-card .btn,
.profile-study-card .btn {
  flex-shrink: 0;
}

.profile-onboarding-editor {
  margin-top: 16px;
}

.back-button {
  margin-top: 16px;
}

.topics-container {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Question Options */
.options { 
  display: grid; 
  gap: 10px; 
  margin-top: 14px; 
}

.option { 
  background: #ffffff; 
  padding: 10px; 
  border-radius: var(--radius); 
  border: 1px solid var(--border-light); 
  cursor: pointer; 
  transition: all 0.2s ease;
}

.option:hover { 
  border-color: var(--accent); 
  background: #f8fafc;
}

/* Option selected styles are handled in components.css */

/* Progress Bar */
.progress { 
  height: 8px; 
  background: var(--border); 
  border-radius: 999px; 
  overflow: hidden; 
}

.progress-container {
  flex: 1;
  margin-right: 12px;
}

.progress > i { 
  display: block; 
  height: 100%; 
  background: linear-gradient(90deg, var(--accent), #60a5fa); 
  width: 0%; 
  transition: width 0.3s ease;
}

/* Footer */
.footer { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  margin-top: 12px; 
}

.submit-button-container {
  min-width: 120px;
}

/* Question screen with rich content */
#f-question.active {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  height: auto;
  max-height: none;
  padding: 0;
  overflow: hidden;
  margin-bottom: 0;
}

.question-header {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.question-header__title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

.question-header__progress {
  width: 100%;
  margin: 0;
}

.question-header__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 2px;
}

.question-header__actions .question-back-btn {
  flex: 0 0 auto;
}

.question-header__actions .btn-compact {
  margin-left: auto;
}

.question-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 14px;
  padding-bottom: 16px;
  -webkit-overflow-scrolling: touch;
}

.question-card {
  margin-bottom: 12px;
}

.question-rich-content {
  font-size: 16px;
  line-height: 1.62;
  color: #111827;
}

.question-footer {
  flex: 0 0 auto;
  display: block;
  margin: 0;
  padding: 12px 16px calc(12px + var(--app-safe-bottom));
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 -6px 18px rgba(15, 23, 42, 0.08);
}

.question-footer .submit-button-container {
  min-width: 0;
  width: 100%;
}

.question-footer .btn-primary,
.question-footer #submitBtn {
  width: 100%;
  min-height: 52px;
  justify-content: center;
}

.question-footer .btn-primary:not(:disabled),
.question-footer #submitBtn:not(:disabled) {
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.22);
}

/* Footer */
.footer { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  margin-top: 12px; 
}

/* Summary Grid */
.summary-grid { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: 8px; 
  margin-top: 12px; 
}

.summary-stats {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
}

.summary-stats > div {
  flex: 1;
  text-align: center;
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100px;
}

.summary-score {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
}

.topic-breakdown-title {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

/* Summary Pagination */
.summary-pagination {
  margin-top: 16px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pagination-info {
  color: var(--muted);
  font-size: 13px;
}

.pagination-controls {
  display: flex;
  gap: 8px;
}

/* Sessions List */
.sessions-section {
  margin-top: 20px;
}

.sessions-title {
  margin-bottom: 12px;
  font-weight: 600;
}

.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.session-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  transition: all 0.2s ease;
  position: relative;
}

.session-item:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.session-item-clickable:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
  transform: translateY(-1px);
}

.session-item-clickable:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(37, 99, 235, 0.2);
}

.session-item-clickable::after {
  content: '→';
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-weight: bold;
  opacity: 0.6;
  transition: opacity 0.2s ease;
}

.session-item-clickable:hover::after {
  opacity: 1;
}

/* Analytics sections */
.analytics-section {
  margin: 20px 0;
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

.analytics-title {
  font-weight: 600;
  margin-bottom: 12px;
  color: #374151;
}

.category-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.category-stat {
  background: #fff;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid #e5e7eb;
  text-align: center;
}

.category-stat-name {
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 4px;
}

.category-stat-score {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 2px;
}

.category-stat-sessions {
  font-size: 11px;
  color: #9ca3af;
}

.category-stat.best {
  border-color: #10b981;
  background: #f0fdf4;
}

.category-stat.worst {
  border-color: #ef4444;
  background: #fef2f2;
}

/* Progress section */
.progress-section {
  margin: 20px 0;
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

/* User Info section */
.user-info-section {
  margin: 20px 0;
}

.user-info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid #e5e7eb;
}

.user-info-item:last-child {
  border-bottom: none;
}

.user-info-label {
  font-weight: 600;
  color: #374151;
  font-size: 14px;
}

.user-info-value {
  color: #111827;
  font-size: 14px;
  text-align: right;
  max-width: 60%;
  word-break: break-word;
}

.user-info-actions {
  margin-top: 24px;
  text-align: center;
}

.category-actions {
  margin-top: 24px;
  text-align: center;
}

.progress-title {
  font-weight: 600;
  margin-bottom: 12px;
  color: #374151;
}

.progress-trend {
  display: flex;
  gap: 8px;
  align-items: end;
  height: 60px;
  padding: 8px 0;
}

.progress-bar {
  flex: 1;
  background: #e5e7eb;
  border-radius: 4px 4px 0 0;
  position: relative;
  min-height: 20px;
  transition: all 0.3s ease;
}

.progress-bar-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, #3b82f6, #60a5fa);
  border-radius: 4px 4px 0 0;
  transition: height 0.3s ease;
}

.progress-bar-label {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: #6b7280;
  white-space: nowrap;
}

.progress-bar-score {
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  font-weight: 600;
  color: #374151;
}

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

.session-topic {
  font-weight: 600;
  color: #111827;
  font-size: 14px;
}

.session-status {
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

.session-status.completed {
  background: #f0fdf4;
  color: #16a34a;
}

.session-status.in-progress {
  background: #fef3c7;
  color: #d97706;
}

.session-details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.session-category {
  font-size: 12px;
  color: var(--muted);
}

.session-score {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

.session-stats {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.session-stat {
  display: flex;
  align-items: center;
  gap: 4px;
}

.session-stat.correct {
  color: var(--success);
}

.session-stat.incorrect {
  color: var(--error);
}

.session-date {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}

.empty-sessions {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-style: italic;
}

/* Results Screen */
.results-score-section {
  text-align: center;
  margin-bottom: 24px;
}

.results-score {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
}

.results-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 18px;
  font-weight: 600;
  color: #111827; /* Default black color for total */
}

.stat-correct {
  color: var(--success);
}

.stat-incorrect {
  color: var(--error);
}

.stat-total {
  color: #111827; /* Black color for total questions */
}

.results-stats--exam {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 10px;
  align-items: stretch;
}

.results-stats--exam .stat-item {
  padding: 8px 10px;
  background: var(--bg-secondary);
  border-radius: 8px;
}

.results-stats--exam #resultsTimeUsedWrap {
  grid-column: 1 / -1;
}

.results-stats--exam .stat-value {
  font-size: 16px;
}

#f-results:has(.results-stats--exam) .results-score-section {
  margin-bottom: 16px;
}

.session-details {
  margin-top: 24px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: 8px;
}

.session-details-title {
  margin-bottom: 8px;
}

.session-info {
  font-size: 14px;
  color: var(--text-secondary);
}

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

/* Detailed Results Styles */
.detailed-results {
  margin-top: 24px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: 8px;
}

.detailed-results-title {
  margin-bottom: 12px;
  font-weight: 600;
}

.results-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab-btn {
  flex: 1;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  background: var(--card);
  border-color: var(--accent);
  color: var(--accent);
}

.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.results-content {
  position: relative;
}

.results-tab-content {
  display: none;
}

.results-tab-content.active {
  display: block;
}

/* Question Result Items */
.question-result-item {
  margin-bottom: 16px;
  padding: 12px;
  background: white;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.question-result-item.correct {
  border-left: 4px solid var(--success);
}

.question-result-item.incorrect {
  border-left: 4px solid var(--error);
}

.question-number {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 4px;
}

.question-content {
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 8px;
  color: #374151;
}

.question-answer {
  font-size: 13px;
  padding: 6px 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  margin-bottom: 6px;
}

.question-answer.user-answer {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
}

.question-answer.correct-answer {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #16a34a;
}

.question-explanation {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
  font-style: italic;
  margin-top: 8px;
  padding: 8px;
  background: #f8fafc;
  border-radius: 4px;
}

.question-explanation.rich-content,
.question-explanation .rich-content {
  font-style: normal;
}

.explanation-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  padding: 6px 12px;
  margin-top: 8px;
  border-radius: 6px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.explanation-toggle:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.explanation-toggle::before {
  content: '▼';
  font-size: 10px;
  transition: transform 0.2s ease;
}

.explanation-toggle.expanded::before {
  transform: rotate(180deg);
}

.explanation-content {
  display: none;
  margin-top: 8px;
}

.explanation-content.expanded {
  display: block;
}

.correct-questions-list .question-result-item {
  border-left-color: var(--success);
}

.incorrect-questions-list .question-result-item {
  border-left-color: var(--error);
}

/* Instructions Lists */
.instructions-list {
  margin: 0;
  padding-left: 20px;
  line-height: 1.6;
}

.instructions-list li {
  margin-bottom: 12px;
  color: #374151;
}

.instructions-list strong {
  color: var(--accent);
}

.tips-list {
  margin: 0;
  padding-left: 20px;
  line-height: 1.5;
}

.tips-list li {
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.tips-section {
  margin-top: 20px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: 8px;
}

.tips-title {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 600;
  color: #111827;
}

/* Utility Classes */
.row { 
  display: flex; 
  gap: 10px; 
  align-items: center; 
}

.link { 
  color: var(--accent); 
  cursor: pointer; 
  text-decoration: underline; 
}

/* Touch and gesture improvements */
.touch-action-manipulation {
  touch-action: manipulation;
}

.no-select {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Improved focus states for accessibility */
.btn:focus-visible,
.option:focus-visible,
.tab-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Better tap feedback */
.btn:active,
.option:active,
.tab-btn:active {
  transform: scale(0.98);
  transition: transform 0.1s ease;
}

/* Icon styles */
.app-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  stroke-width: 2;
  display: block;
}

.app-icon-sm {
  width: 16px;
  height: 16px;
}

.app-icon-lg {
  width: 22px;
  height: 22px;
}

.icon-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.practice-cta .app-icon,
.header .brand.icon-label .btn-icon {
  color: currentColor;
}

.status-icon {
  display: inline-flex;
  align-items: center;
  margin-right: 4px;
  vertical-align: middle;
}

.status-icon .app-icon {
  width: 16px;
  height: 16px;
}

.session-stat .app-icon {
  width: 14px;
  height: 14px;
}

.session-stat.correct .app-icon {
  color: #16a34a;
}

.session-stat.incorrect .app-icon {
  color: #dc2626;
}

/* Button with icon layout */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn .icon-label {
  flex: 1;
  justify-content: center;
  min-width: 0;
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid #f3f3f3;
  border-top: 2px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 8px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Notifications */
.notification-container {
  position: fixed;
  top: auto;
  right: 12px;
  bottom: calc(16px + var(--app-safe-bottom));
  z-index: 1000;
  max-width: 300px;
}

#f-question.active ~ .notification-container,
body:has(#f-question.active) .notification-container {
  top: auto;
  bottom: calc(84px + var(--app-safe-bottom));
  left: 12px;
  right: 12px;
  max-width: none;
}

.notification {
  background: white;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border-left: 4px solid var(--accent);
  animation: slideIn 0.3s ease;
}

.notification.success {
  border-left-color: var(--success);
}

.notification.error {
  border-left-color: var(--error);
}

.diagnostics-panel {
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid #fecaca;
  border-left: 4px solid var(--error);
  border-radius: 8px;
  background: #fef2f2;
  color: #111827;
  overflow-wrap: anywhere;
}

.diagnostics-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--error);
  margin-bottom: 6px;
}

.diagnostics-summary {
  font-size: 13px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.diagnostics-list {
  display: grid;
  grid-template-columns: minmax(110px, 38%) 1fr;
  gap: 6px 10px;
  margin: 0;
  padding: 10px;
  border-radius: 8px;
  background: white;
  border: 1px solid #fee2e2;
}

.diagnostics-list dt {
  color: #6b7280;
  font-size: 12px;
  font-weight: 700;
}

.diagnostics-list dd {
  margin: 0;
  font-size: 12px;
  color: #111827;
  word-break: break-word;
}

.diagnostics-actions {
  margin-top: 10px;
  display: flex;
  justify-content: flex-end;
}

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

/* Enhanced animations */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Animation classes */
.slide-up {
  animation: slideUp 0.4s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.4s ease-out;
}

.slide-in-left {
  animation: slideInLeft 0.4s ease-out;
}

.scale-in {
  animation: scaleIn 0.3s ease-out;
}

.loading-pulse {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Staggered animations for lists */
.session-item {
  animation: slideUp 0.4s ease-out;
  animation-fill-mode: both;
}

.session-item:nth-child(1) { animation-delay: 0.1s; }
.session-item:nth-child(2) { animation-delay: 0.2s; }
.session-item:nth-child(3) { animation-delay: 0.3s; }
.session-item:nth-child(4) { animation-delay: 0.4s; }
.session-item:nth-child(5) { animation-delay: 0.5s; }

/* Responsive Design */
@media (max-width: 768px) {
  .container.app-shell {
    padding-top: calc(8px + var(--app-header-top-offset));
    padding-right: max(8px, var(--app-header-side-offset-right));
    padding-bottom: calc(var(--app-safe-bottom) + 8px);
    padding-left: max(8px, var(--app-header-side-offset-left));
  }
  
  .frame {
    padding: 16px;
    margin-bottom: 12px;
  }
  
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 20px;
  }

  .question-header {
    padding: 10px 12px;
    gap: 8px;
  }

  .question-header__actions .btn {
    min-height: 44px;
  }
  
  .summary-grid {
    grid-template-columns: 1fr;
  }
  
  /* Touch-friendly buttons */
  .btn {
    min-height: 48px;
    padding: 14px 20px;
    font-size: 16px;
    border-radius: 8px;
  }
  
  .btn.ghost {
    min-height: 48px;
    padding: 14px 20px;
  }
  
  /* Larger touch targets for options */
  .option {
    min-height: 56px;
    padding: 16px 12px;
    font-size: 16px;
    line-height: 1.4;
  }
  
  /* Better spacing for mobile */
  .category-list {
    gap: 12px;
  }
  
  .level-buttons {
    gap: 16px;
  }
  
  .nav-card-grid {
    gap: 10px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  
  /* Mobile-friendly session items */
  .session-item {
    padding: 16px;
    margin-bottom: 12px;
  }
  
  .session-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .session-details {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .session-stats {
    flex-wrap: wrap;
    gap: 16px;
  }
  
  /* Mobile pagination */
  .pagination-controls {
    flex-direction: column;
    gap: 8px;
  }
  
  .pagination-controls .btn {
    width: 100%;
  }
  
  /* Mobile results tabs */
  .results-tabs {
    flex-direction: column;
    gap: 8px;
  }
  
  .tab-btn {
    min-height: 48px;
    font-size: 16px;
  }
  
  /* Mobile user info */
  .user-info-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .user-info-value {
    text-align: left;
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .container.app-shell {
    padding-top: calc(6px + var(--app-header-top-offset));
    padding-right: max(6px, var(--app-header-side-offset-right));
    padding-bottom: calc(var(--app-safe-bottom) + 6px);
    padding-left: max(6px, var(--app-header-side-offset-left));
  }
  
  .frame {
    padding: 12px;
  }
  
  /* Even larger touch targets for small screens */
  .btn {
    min-height: 52px;
    padding: 16px 24px;
  }

  .question-header {
    padding: 10px;
  }

  .question-header__title {
    font-size: 14px;
  }
  
  .option {
    min-height: 60px;
    padding: 18px 16px;
  }
  
  /* Compact mobile layout */
  .main-title {
    font-size: 20px;
    margin-bottom: 12px;
  }
  
  .main-description {
    font-size: 14px;
    margin-bottom: 20px;
  }
  
  .card-title {
    font-size: 14px;
    margin-bottom: 6px;
  }
}

/* Question header actions: compact controls (override touch-friendly .btn rules) */
.question-header__actions .btn,
.question-header__actions .btn-secondary,
.question-header__actions .btn-compact-header {
  min-height: 44px;
  height: auto;
  padding: 0 14px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  width: auto;
  flex: 0 0 auto;
  box-shadow: none;
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border-card);
}

.question-header__actions .btn-secondary:hover:not(:disabled),
.question-header__actions .btn-compact-header:hover:not(:disabled) {
  border-color: var(--accent);
  box-shadow: none;
}

.question-header__actions .btn-secondary:focus-visible,
.question-header__actions .btn-compact-header:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.question-header__actions .icon-label {
  flex: 0 0 auto;
  justify-content: flex-start;
  gap: 6px;
  min-width: 0;
}

.question-header__actions .app-icon,
.question-header__actions .app-icon-sm {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Telegram: only reserve status-bar height at top; horizontal inset lives in .header */
html.is-telegram-webapp .container.app-shell,
body.is-telegram-webapp .container.app-shell {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--tg-status-bar-height) + 6px);
  padding-right: max(12px, var(--app-safe-right));
  padding-left: max(12px, var(--app-safe-left));
}

@media (max-width: 768px) {
  html.is-telegram-webapp .container.app-shell,
  body.is-telegram-webapp .container.app-shell {
    padding-top: calc(var(--tg-status-bar-height) + 4px);
    padding-right: max(8px, var(--app-safe-right));
    padding-left: max(8px, var(--app-safe-left));
  }
}

@media (max-width: 480px) {
  html.is-telegram-webapp .container.app-shell,
  body.is-telegram-webapp .container.app-shell {
    padding-top: calc(var(--tg-status-bar-height) + 4px);
    padding-right: max(6px, var(--app-safe-right));
    padding-left: max(6px, var(--app-safe-left));
  }
}