/* ==========================================================================
   Components — Layout-level shared styles
   These are NOT inside shadow DOM; they style the outer app shell and
   shared patterns (cards, buttons, progress, modals, banners, etc.).
   ========================================================================== */

/* --- Card --- */
.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--timing-fast) ease,
              box-shadow var(--timing-fast) ease;
  overflow: hidden;
  min-width: 0;
}

.card.category-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: 48px;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  user-select: none;
  transition: background-color var(--timing-fast) ease,
              transform var(--timing-fast) ease,
              box-shadow var(--timing-fast) ease;
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: #5a52e0;
  box-shadow: 0 4px 14px rgba(108, 99, 255, 0.4);
}

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

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

.btn-cta {
  background-color: var(--color-accent);
  color: #FFFFFF;
  min-height: 56px;
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 14px rgba(108, 99, 255, 0.35);
}

.btn-cta:hover:not(:disabled) {
  background-color: #5a52e0;
  box-shadow: 0 6px 20px rgba(108, 99, 255, 0.5);
  transform: translateY(-1px);
}

.btn-cta:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

/* --- Progress bar --- */
.progress-bar-container {
  width: 100%;
  height: 8px;
  background-color: rgba(139, 148, 158, 0.2);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background-color: var(--color-accent);
  transition: width var(--timing-normal) ease;
}

/* --- Badge / Chip --- */
.badge-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background-color: rgba(108, 99, 255, 0.15);
  color: var(--color-accent);
  white-space: nowrap;
}

/* --- Toast --- */
.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-bg-card);
  color: var(--color-text-main);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  pointer-events: none;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  padding: var(--space-md);
}

.modal-content {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 480px;
  width: 100%;
  max-height: 85dvh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

/* --- Mastery bar --- */
.mastery-bar {
  width: 100%;
  height: 6px;
  background-color: rgba(139, 148, 158, 0.15);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.mastery-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--timing-normal) ease;
}

/* Mastery colour variants */
.mastery-bar--red    .mastery-bar-fill { background-color: var(--color-incorrect); }
.mastery-bar--yellow .mastery-bar-fill { background-color: var(--color-xp); }
.mastery-bar--blue   .mastery-bar-fill { background-color: var(--color-streak); }
.mastery-bar--gold   .mastery-bar-fill { background-color: #FFD700; }

/* --- Skeleton loader --- */
.skeleton {
  background: linear-gradient(
    90deg,
    rgba(139, 148, 158, 0.1) 25%,
    rgba(139, 148, 158, 0.2) 50%,
    rgba(139, 148, 158, 0.1) 75%
  );
  background-size: 200% 100%;
  animation: pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
  min-height: 1em;
}

/* --- Lock badge (paid feature indicator) --- */
.lock-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: var(--font-size-sm);
  background-color: rgba(139, 148, 158, 0.2);
  border-radius: var(--radius-full);
  user-select: none;
  flex-shrink: 0;
}

.lock-badge::before {
  content: "\1F512";
}

/* --- Banner --- */
.banner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
}

.banner--info {
  background-color: rgba(0, 176, 255, 0.12);
  color: var(--color-streak);
}

.banner--warning {
  background-color: rgba(255, 179, 0, 0.12);
  color: var(--color-xp);
}

.banner--offline {
  background-color: rgba(139, 148, 158, 0.12);
  color: var(--color-text-sub);
}

/* --- Icon button (settings, theme toggle, back, quit) --- */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: var(--font-size-lg);
  color: var(--color-text-sub);
  background: none;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: color var(--timing-fast) ease,
              background-color var(--timing-fast) ease;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}

.btn-icon:hover {
  color: var(--color-text-main);
  background-color: rgba(139, 148, 158, 0.12);
}

/* --- Link button --- */
.btn-link {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: inherit;
  font-weight: var(--font-weight-medium);
  text-decoration: underline;
  padding: 0;
}

.btn-link:hover {
  opacity: 0.85;
}

/* --- Danger button --- */
.btn-danger {
  background-color: var(--color-incorrect);
  color: #FFFFFF;
  width: 100%;
}

.btn-danger:hover:not(:disabled) {
  background-color: #e04545;
}

/* --- Text utility --- */
.text-sub {
  color: var(--color-text-sub);
  font-size: var(--font-size-sm);
}

/* ==========================================================================
   Dashboard layout
   ========================================================================== */

.dashboard {
  padding: var(--space-md);
  max-width: 1200px;
  margin-inline: auto;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-md);
}

.dashboard-title {
  font-size: var(--font-size-xl);
  margin-bottom: 0;
  flex: 1;
  text-align: center;
}

.dashboard-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.dashboard-actions .btn-cta {
  width: 100%;
}

.dashboard-secondary-actions {
  display: flex;
  gap: var(--space-sm);
}

.dashboard-secondary-actions .btn {
  flex: 1;
}

/* Mastery rows in dashboard */
.mastery-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-sm) 0;
}

.mastery-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mastery-row-bar {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.mastery-bar-wrap {
  flex: 1;
  min-width: 0;
}

.mastery-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
  white-space: nowrap;
  width: 6ch;
  text-align: right;
  flex-shrink: 0;
}

.mastery-accuracy {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
  white-space: nowrap;
  width: 9ch;
  text-align: right;
  flex-shrink: 0;
}

.mastery-study-link {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  text-decoration: none;
  align-self: flex-end;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.mastery-study-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* Today stats grid (desktop) */
.today-stats-grid {
  display: flex;
  gap: var(--space-lg);
  justify-content: space-around;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.stat-value {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-main);
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
}

/* Today stats row (mobile) */
.today-stats-row {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
}

/* Badges recent */
.badges-recent {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ==========================================================================
   Screen layout (shared)
   ========================================================================== */

.screen {
  padding: var(--space-md);
  max-width: 720px;
  margin-inline: auto;
}

.screen-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-bottom: var(--space-lg);
}

.screen-header h2 {
  margin-bottom: 0;
}

/* ==========================================================================
   Quiz screen
   ========================================================================== */

.quiz-screen {
  padding: var(--space-md);
  padding-bottom: calc(48px + var(--space-lg) * 3);
  max-width: 720px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.quiz-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-bottom: var(--space-md);
}

.quiz-progress {
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
}

.quiz-header progress-bar {
  flex: 1;
}

.quiz-next-btn {
  position: fixed;
  bottom: var(--space-md);
  left: var(--space-md);
  right: var(--space-md);
  max-width: calc(720px - var(--space-md) * 2);
  margin-inline: auto;
  z-index: var(--z-toast);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   Session result screen
   ========================================================================== */

.result-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60dvh;
  gap: var(--space-lg);
  text-align: center;
}

.result-stats {
  display: flex;
  justify-content: space-around;
  width: 100%;
  max-width: 400px;
}

.result-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.result-stat-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-main);
}

.result-stat .xp-result .result-stat-value {
  color: var(--color-xp);
}

.result-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
}

/* ==========================================================================
   Settings screen
   ========================================================================== */

.settings-screen {
  padding-bottom: var(--space-2xl);
}

.settings-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.settings-footer {
  text-align: center;
  padding-top: var(--space-lg);
}

/* ==========================================================================
   Category select screen
   ========================================================================== */

.category-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.category-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color var(--timing-fast) ease,
              transform var(--timing-fast) ease;
  text-align: left;
  width: 100%;
}

.category-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.category-icon {
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
}

.category-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.category-name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   Level up overlay
   ========================================================================== */

.level-up-content {
  text-align: center;
  color: #FFFFFF;
}

.level-up-number {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin-top: var(--space-md);
}

/* ==========================================================================
   Error screen
   ========================================================================== */

.error-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50dvh;
  gap: var(--space-lg);
  text-align: center;
}

/* ==========================================================================
   Locked feature indicator on buttons
   ========================================================================== */

.btn.locked {
  opacity: 0.6;
  position: relative;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-main);
}

.form-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.form-input,
.form-select {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  color: var(--color-text-main);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-text-sub);
  border-radius: var(--radius-sm);
  min-height: 40px;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--color-accent);
  outline: none;
}

.form-range {
  flex: 1;
  accent-color: var(--color-accent);
  min-width: 120px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  accent-color: var(--color-accent);
  width: 18px;
  height: 18px;
}

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--color-text-sub);
  border-radius: var(--radius-full);
  transition: background-color var(--timing-fast) ease;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: #FFFFFF;
  border-radius: var(--radius-full);
  transition: transform var(--timing-fast) ease;
}

.toggle input:checked + .toggle-slider {
  background-color: var(--color-accent);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

.recommendation {
  padding: var(--space-sm) var(--space-md);
  background-color: rgba(108, 99, 255, 0.1);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-accent);
}

/* ==========================================================================
   Onboarding screens
   ========================================================================== */

.onboarding {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: var(--space-lg);
}

.onboarding-screen {
  max-width: 480px;
  width: 100%;
  text-align: center;
}

.onboarding-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.onboarding-icon {
  font-size: 4rem;
}

.onboarding-goals {
  text-align: left;
}

.onboarding-goals h2 {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.onboarding-goals .btn-cta {
  width: 100%;
  margin-top: var(--space-lg);
}

.onboarding-tutorial {
  display: flex;
  flex-direction: column;
  padding-bottom: calc(48px + var(--space-lg) * 3);
  gap: var(--space-md);
}

.tutorial-header {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
  font-weight: var(--font-weight-medium);
}

.onboarding-complete {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

/* ==========================================================================
   Goal progress ring
   ========================================================================== */

.goal-ring-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin: 0 auto 0;
}

.goal-ring {
  display: block;
}

.goal-ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.goal-ring-value {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-main);
}

.goal-ring-target {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
}

.goal-ring-container.goal-complete .goal-ring-fill {
  stroke: var(--color-correct);
}

.goal-ring-container.goal-complete .goal-ring-value {
  color: var(--color-correct);
}

.goal-ring-check {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-correct);
  line-height: 1;
}

.goal-ring-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.goal-ring-caption {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
  text-align: center;
  margin-top: var(--space-xs);
}

.goal-ring-caption.complete {
  color: var(--color-correct);
  font-weight: var(--font-weight-medium);
}

.streak-xp-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}

/* ==========================================================================
   Exam countdown
   ========================================================================== */

.exam-countdown {
  text-align: center;
  margin-bottom: var(--space-md);
}

.countdown-content {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background-color: rgba(108, 99, 255, 0.1);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--color-accent);
}

.countdown-days {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.countdown-soon {
  background-color: rgba(255, 179, 0, 0.12);
  color: var(--color-xp);
}

.countdown-urgent {
  background-color: rgba(255, 82, 82, 0.12);
  color: var(--color-incorrect);
}

/* ==========================================================================
   Quiz retry button
   ========================================================================== */

.quiz-retry-btn {
  position: fixed;
  bottom: calc(56px + var(--space-md) + var(--space-sm));
  left: var(--space-md);
  right: var(--space-md);
  max-width: calc(720px - var(--space-md) * 2);
  margin-inline: auto;
  z-index: var(--z-toast);
}

/* ==========================================================================
   Session result enhancements
   ========================================================================== */

.result-message {
  font-size: var(--font-size-md);
  color: var(--color-text-sub);
  margin-bottom: var(--space-sm);
}

.result-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
  max-width: 400px;
}

.result-breakdown {
  width: 100%;
  max-width: 400px;
}

.result-category-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) 0;
  font-size: var(--font-size-sm);
}

.result-category-row + .result-category-row {
  border-top: 1px solid rgba(139, 148, 158, 0.15);
}

/* ==========================================================================
   Keyboard hints (desktop)
   ========================================================================== */

.kbd-hints {
  text-align: center;
  margin-bottom: var(--space-sm);
}

/* ==========================================================================
   Mock exam
   ========================================================================== */

/* Mode select */
.mock-mode-select {
  text-align: center;
}

.mock-mode-select h2 {
  margin-bottom: var(--space-lg);
}

.mock-mode-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.mock-mode-card {
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
  transition: border-color var(--timing-fast) ease,
              transform var(--timing-fast) ease;
  width: 100%;
}

.mock-mode-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.mock-mode-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-xs);
}

.mock-mode-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
  margin-bottom: var(--space-sm);
}

.mock-mode-card-specs {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-accent);
}

.mock-no-xp-note {
  margin-bottom: var(--space-md);
}

.mock-cancel-btn {
  width: 100%;
}

/* Mock exam: timer inside quiz-header, sticky */
.quiz-header exam-timer {
  margin-left: auto;
  flex-shrink: 0;
}

.quiz-header:has(exam-timer) {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky, 10);
  background-color: var(--color-bg-main);
}

/* Verdict screen */
.mock-verdict {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  width: 100%;
  max-width: 400px;
}

.mock-verdict-label {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

.mock-verdict-pass {
  background-color: rgba(76, 175, 80, 0.15);
  color: var(--color-correct);
}

.mock-verdict-fail {
  background-color: rgba(255, 82, 82, 0.15);
  color: var(--color-incorrect);
}

/* Weak category highlight */
.mock-category-weak {
  color: var(--color-incorrect);
  font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   Flashcard
   ========================================================================== */

.flashcard-screen {
  padding: var(--space-md);
  max-width: 640px;
  margin: 0 auto;
}

/* Topic list */
.flashcard-topic-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.flashcard-section-group {
  margin-bottom: var(--space-md);
}

.flashcard-section-title {
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
  margin-bottom: var(--space-sm);
  padding-left: var(--space-xs);
}

.flashcard-topic-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: var(--space-md);
  text-align: left;
  width: 100%;
  border: none;
  font: inherit;
  color: inherit;
}

.flashcard-topic-card:hover {
  transform: translateY(-2px);
}

.flashcard-topic-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.flashcard-topic-name {
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
}

.flashcard-topic-quiz-count {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
}

.flashcard-topic-progress {
  font-size: var(--font-size-xs);
  color: var(--color-text-sub);
}

/* Card view */
.flashcard-topic-label {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
  margin-bottom: var(--space-md);
}

.flashcard-counter {
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
}

/* Card flip */
.flashcard-card {
  perspective: 800px;
  cursor: pointer;
  min-height: 200px;
  margin-bottom: var(--space-md);
}

.flashcard-face {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  text-align: center;
  font-size: var(--font-size-lg);
  line-height: var(--line-height-base);
  backface-visibility: hidden;
  transition: transform var(--timing-normal) ease;
  box-shadow: var(--shadow-card);
}

.flashcard-front {
  border: 2px solid var(--color-accent);
}

.flashcard-back {
  display: none;
  border: 2px solid var(--color-correct);
  font-size: var(--font-size-base);
}

.flashcard-card--flipped .flashcard-front {
  display: none;
}

.flashcard-card--flipped .flashcard-back {
  display: flex;
}

.flashcard-hint {
  text-align: center;
  margin-bottom: var(--space-md);
  font-size: var(--font-size-xs);
}

/* Progress dots */
.flashcard-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.flashcard-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-sub);
  opacity: 0.3;
}

.flashcard-dot--active {
  background: var(--color-accent);
  opacity: 1;
}

/* Actions */
.flashcard-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.flashcard-nav {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.flashcard-quiz-btn {
  width: 100%;
}

/* --- History / Weakness Panel --- */
.area-history {
  grid-area: area-history;
}

.weak-panel {
  margin-top: var(--space-md);
}

.weak-panel summary {
  cursor: pointer;
  font-weight: 600;
  padding: var(--space-xs) 0;
}

.weak-topic-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.weak-topic-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(139, 148, 158, 0.1);
  gap: var(--space-sm);
}

.weak-topic-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9em;
}

.weak-topic-score {
  color: var(--color-incorrect);
  font-weight: 600;
  font-size: 0.85em;
  white-space: nowrap;
}

.prompt-copy-btn {
  min-height: 36px;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.8em;
  white-space: nowrap;
  flex-shrink: 0;
}

.no-mistakes-message {
  color: var(--color-correct);
  text-align: center;
  padding: var(--space-md);
}

.history-summary-stats {
  font-size: 0.85em;
  color: var(--color-text-sub);
  margin-bottom: var(--space-sm);
}

.history-daily-entry summary {
  cursor: pointer;
  padding: var(--space-sm) 0;
  font-size: 0.9em;
  border-bottom: 1px solid rgba(139, 148, 158, 0.1);
}

.history-session-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.85em;
  color: var(--color-text-sub);
}

.mock-tag {
  background-color: var(--color-accent);
  color: var(--color-bg);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.75em;
  font-weight: 600;
}