/*
 * se-gym-stats.css
 *
 * Styles for the /se-gym-stats/ analytics dashboard page.
 *
 * IMPORTANT: This site sets html { font-size: 62.5% } so 1rem = 10px.
 * Never use rem for readable text — use em or inherit instead.
 *
 * Every component has both a default (light) rule and an html.dark-mode
 * override. Use design tokens from css/design-tokens.css throughout.
 *
 * Loaded alongside css/se-gym.css on the stats page, so .gym-btn,
 * .gym-item-badge, .quiz-badge, .flashcard-badge, .is-hidden, and
 * workout-breakdown level colors are all available.
 */

/* ==================== Stats Page Layout ==================== */

#stats-app {
  max-width: min(100%, 1200px);
  margin: 0 auto;
  padding: 0 var(--sp-lg, 16px) var(--sp-2xl, 32px);
  font-family: 'Inter', 'Helvetica Neue', sans-serif;
  box-sizing: border-box;
}

#stats-app *,
#stats-app *::before,
#stats-app *::after {
  box-sizing: border-box;
}

/* ==================== Disabled / Empty State Panel ==================== */

.stats-disabled-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-lg, 16px);
  padding: var(--sp-3xl, 48px) var(--sp-xl, 24px);
  text-align: center;
  background: var(--color-surface-2, #f8f9fa);
  border: 1px solid var(--color-divider, #e1e4e8);
  border-radius: var(--radius-lg, 12px);
  margin-bottom: var(--sp-2xl, 32px);
}

.stats-disabled-panel p {
  margin: 0;
  color: var(--color-text-muted, #595959);
  font-size: 1.05em;
  max-width: 480px;
}

.stats-disabled-panel .fa-solid {
  font-size: 1.6em;
  color: var(--color-primary, #2774AE);
  display: block;
  margin-bottom: var(--sp-sm, 8px);
}

html.dark-mode .stats-disabled-panel {
  background: var(--color-surface-2, #252525);
  border-color: var(--color-divider, #444444);
}

/* ==================== Section Wrappers ==================== */

.stats-section {
  margin-bottom: var(--sp-3xl, 48px);
  padding-bottom: var(--sp-2xl, 32px);
  border-bottom: 1px solid var(--color-divider, #e1e4e8);
}

.stats-section:last-child {
  border-bottom: none;
}

.stats-section h2 {
  color: var(--color-primary, #2774AE);
  font-weight: 700;
  margin-top: var(--sp-2xl, 32px);
  margin-bottom: var(--sp-lg, 16px);
  border-bottom: 2px solid var(--color-divider, #e1e4e8);
  padding-bottom: var(--sp-sm, 8px);
  font-size: 1.4em;
}

.stats-section h3 {
  font-size: 1.1em;
  font-weight: 600;
  color: var(--color-text, #111111);
  margin-top: var(--sp-xl, 24px);
  margin-bottom: var(--sp-md, 12px);
}

html.dark-mode .stats-section {
  border-bottom-color: var(--color-divider, #444444);
}

html.dark-mode .stats-section h2 {
  color: var(--color-primary, #8BB8E8);
  border-bottom-color: var(--color-divider, #444444);
}

html.dark-mode .stats-section h3 {
  color: var(--color-text, #e6edf3);
}

/* ==================== Overview Tiles ==================== */

.stats-tiles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-md, 12px);
  margin-bottom: var(--sp-xl, 24px);
}

.stats-tile {
  flex: 1 1 140px;
  min-width: 120px;
  padding: var(--sp-lg, 16px) var(--sp-xl, 24px);
  background: var(--color-surface, #ffffff);
  border: 1px solid var(--color-border, #d8dde2);
  border-radius: var(--radius-lg, 12px);
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.08));
  text-align: center;
}

.stats-tile-value {
  font-size: 2.2em;
  font-weight: 700;
  color: var(--color-primary, #2774AE);
  line-height: 1.1;
  margin-bottom: var(--sp-xs, 4px);
}

.stats-tile-label {
  font-size: 0.9em;
  color: var(--color-text-muted, #595959);
}

html.dark-mode .stats-tile {
  background: var(--color-surface, #1e1e1e);
  border-color: var(--color-border, #333333);
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.4));
}

html.dark-mode .stats-tile-value {
  color: var(--color-primary, #8BB8E8);
}

html.dark-mode .stats-tile-label {
  color: var(--color-text-muted, #b0b0b0);
}

/* ==================== Hero Donut ==================== */

.stats-donut-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  margin-top: var(--sp-xl, 24px);
}

.stats-donut {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: conic-gradient(
    var(--ring-correct, #1f7a3d) calc(var(--pct, 0) * 1%),
    var(--ring-rest, #e5e7eb) 0
  );
}

.stats-donut-hole {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-surface, #ffffff);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stats-donut-pct {
  font-size: 1.3em;
  font-weight: 700;
  color: var(--color-text, #111111);
}

html.dark-mode .stats-donut {
  background: conic-gradient(
    var(--ring-correct, #4fa34f) calc(var(--pct, 0) * 1%),
    var(--ring-rest, #3a3f47) 0
  );
}

html.dark-mode .stats-donut-hole {
  background: var(--color-surface, #1e1e1e);
}

html.dark-mode .stats-donut-pct {
  color: var(--color-text, #e6edf3);
}

/* ==================== Difficulty Table ==================== */

.stats-diff-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--sp-md, 12px);
}

.stats-diff-table th,
.stats-diff-table td {
  padding: var(--sp-sm, 8px) var(--sp-md, 12px);
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--color-divider, #e1e4e8);
}

.stats-diff-table th {
  font-size: 0.9em;
  font-weight: 600;
  color: var(--color-text-muted, #595959);
  background: var(--color-surface-2, #f8f9fa);
}

.stats-diff-table td {
  color: var(--color-text, #111111);
}

.stats-diff-table tr:last-child td {
  border-bottom: none;
}

.stats-diff-bar-track {
  height: 14px;
  min-width: 100px;
  background: var(--color-surface-2, #f0f2f4);
  border-radius: var(--radius-pill, 999px);
  overflow: hidden;
}

.stats-diff-bar-fill {
  height: 100%;
  border-radius: var(--radius-pill, 999px);
  transition: width 0.4s ease;
  min-width: 0;
}

html.dark-mode .stats-diff-table th {
  color: var(--color-text-muted, #b0b0b0);
  background: var(--color-surface-2, #252525);
}

html.dark-mode .stats-diff-table th,
html.dark-mode .stats-diff-table td {
  border-bottom-color: var(--color-divider, #444444);
}

html.dark-mode .stats-diff-table td {
  color: var(--color-text, #e6edf3);
}

html.dark-mode .stats-diff-bar-track {
  background: var(--color-surface-3, #1a1a1a);
}

/* ==================== Difficulty Badge Chips ==================== */
/*
 * These classes are used on the stats page to display difficulty level
 * chips. Light-mode colors verified ≥ 4.5:1 against white background.
 */

.difficulty-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-pill, 999px);
  font-size: 0.85em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.4;
  white-space: nowrap;
}

.difficulty-badge.level-basic {
  background: rgba(31, 122, 61, 0.12);
  color: #1a6633;
  border: 1px solid rgba(31, 122, 61, 0.3);
}

.difficulty-badge.level-intermediate {
  background: rgba(39, 116, 174, 0.12);
  color: #1a5c8a;
  border: 1px solid rgba(39, 116, 174, 0.3);
}

.difficulty-badge.level-advanced {
  background: rgba(184, 91, 0, 0.12);
  color: #8a3e00;
  border: 1px solid rgba(184, 91, 0, 0.3);
}

.difficulty-badge.level-expert {
  background: rgba(184, 30, 44, 0.12);
  color: #8a0011;
  border: 1px solid rgba(184, 30, 44, 0.3);
}

.difficulty-badge.level-untagged {
  background: rgba(85, 85, 85, 0.10);
  color: #444444;
  border: 1px solid rgba(85, 85, 85, 0.25);
}

html.dark-mode .difficulty-badge.level-basic {
  background: rgba(79, 163, 79, 0.15);
  color: #6dd46d;
  border-color: rgba(79, 163, 79, 0.35);
}

html.dark-mode .difficulty-badge.level-intermediate {
  background: rgba(95, 168, 211, 0.15);
  color: #7fc4e8;
  border-color: rgba(95, 168, 211, 0.35);
}

html.dark-mode .difficulty-badge.level-advanced {
  background: rgba(224, 163, 90, 0.15);
  color: #e8b870;
  border-color: rgba(224, 163, 90, 0.35);
}

html.dark-mode .difficulty-badge.level-expert {
  background: rgba(255, 133, 133, 0.15);
  color: #ff9898;
  border-color: rgba(255, 133, 133, 0.35);
}

html.dark-mode .difficulty-badge.level-untagged {
  background: rgba(176, 176, 176, 0.12);
  color: #c0c0c0;
  border-color: rgba(176, 176, 176, 0.28);
}

/* ==================== Question Lists ==================== */

.stats-questions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2xl, 32px);
}

.stats-q-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm, 8px);
}

.stats-q-row {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) 60px;
  gap: var(--sp-md, 12px);
  align-items: start;
  padding: var(--sp-sm, 8px) var(--sp-md, 12px);
  background: var(--color-surface, #ffffff);
  border: 1px solid var(--color-border, #d8dde2);
  border-radius: var(--radius-md, 8px);
}

.stats-q-row:hover {
  border-color: var(--color-primary, #2774AE);
}

.stats-q-check {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  min-width: 16px;
  cursor: pointer;
  accent-color: var(--color-primary, #2774AE);
}

.stats-q-label {
  display: flex;
  flex-direction: column;
  gap: var(--sp-xs, 4px);
  cursor: pointer;
  min-width: 0;
}

.stats-q-text {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 0.95em;
  color: var(--color-text, #111111);
  line-height: 1.4;
  word-break: break-word;
}

.stats-q-meta {
  display: flex;
  gap: var(--sp-xs, 4px);
  align-items: center;
  flex-wrap: wrap;
  margin-top: var(--sp-xs, 4px);
}

.stats-q-fraction {
  font-size: 0.9em;
  color: var(--color-text-muted, #595959);
  white-space: nowrap;
}

.stats-acc-bar-track {
  width: 60px;
  height: 8px;
  background: var(--color-surface-2, #f0f2f4);
  border-radius: var(--radius-pill, 999px);
  overflow: hidden;
  margin-top: 6px;
  align-self: start;
  flex-shrink: 0;
}

.stats-acc-bar-fill {
  height: 100%;
  border-radius: var(--radius-pill, 999px);
  transition: width 0.4s ease;
}

.stats-select-hint {
  font-size: 0.9em;
  color: var(--color-text-muted, #595959);
  margin-top: var(--sp-md, 12px);
}

/* Live feedback for quick-add / practice-weak actions. min-height reserves
   space so the layout does not jump when a message appears or clears. */
.stats-action-status {
  min-height: 1.5em;
  margin: var(--sp-md, 12px) 0 0;
  font-size: 1em;
  font-weight: 600;
  color: var(--color-text, #111111);
}

html.dark-mode .stats-action-status {
  color: var(--color-text, #e6edf3);
}

html.dark-mode .stats-q-row {
  background: var(--color-surface, #1e1e1e);
  border-color: var(--color-border, #333333);
}

html.dark-mode .stats-q-row:hover {
  border-color: var(--color-primary, #8BB8E8);
}

html.dark-mode .stats-q-text {
  color: var(--color-text, #e6edf3);
}

html.dark-mode .stats-q-fraction {
  color: var(--color-text-muted, #b0b0b0);
}

html.dark-mode .stats-acc-bar-track {
  background: var(--color-surface-3, #1a1a1a);
}

html.dark-mode .stats-select-hint {
  color: var(--color-text-muted, #b0b0b0);
}

/* ==================== Topic Mastery ==================== */

.stats-topic-mastery {
  margin-bottom: var(--sp-2xl, 32px);
}

.mastery-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm, 8px);
  list-style: none;
  padding: 0;
  margin: 0;
}

.mastery-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md, 12px);
  border: 1px solid #afc1d1;
  border-radius: var(--radius-md, 8px);
  padding: var(--sp-sm, 8px) var(--sp-md, 12px);
  background: var(--gym-paper, #f7fbff);
}

.mastery-info {
  flex: 1 1 auto;
  min-width: 0;
}

.mastery-title {
  display: block;
  color: var(--color-text, #111111);
}

.mastery-meta {
  display: block;
  font-size: 0.9em;
  margin: var(--sp-xs, 4px) 0 var(--sp-sm, 8px);
  color: var(--color-text-muted, #595959);
}

.mastery-state {
  font-weight: 700;
}

.mastery-bar {
  height: 10px;
  border-radius: var(--radius-pill, 999px);
  background: #e1e4e8;
  overflow: hidden;
}

.mastery-bar-fill {
  display: block;
  height: 100%;
  width: var(--mastery-pct, 0%);
  background: var(--color-primary, #2774AE);
  transition: width 0.3s ease;
}

/* State label contrasts on the near-white #f7fbff row (all PASS >= 4.5:1). */
.mastery-state-learning .mastery-state { color: #8a5a00; }
.mastery-state-learning .mastery-bar-fill { background: #d98a00; }
.mastery-state-proficient .mastery-state { color: #1357a0; }
.mastery-state-proficient .mastery-bar-fill { background: #1F6EBD; }
.mastery-state-mastered .mastery-state { color: #1d7a3d; }
.mastery-state-mastered .mastery-bar-fill { background: #1d9a4d; }

.mastery-practice-btn {
  flex: 0 0 auto;
}

html.dark-mode .mastery-row {
  border-color: #46566a;
  background: var(--gym-paper, #172534);
  color: var(--color-text, #e6edf3);
}

html.dark-mode .mastery-title {
  color: var(--color-text, #e6edf3);
}

html.dark-mode .mastery-meta {
  color: var(--color-text-muted, #b0b0b0);
}

html.dark-mode .mastery-bar {
  background: #2c3a47;
}

/* State labels on the dark #172534 row (all light-on-dark, PASS >= 4.5:1). */
html.dark-mode .mastery-state-learning .mastery-state { color: #f0c040; }
html.dark-mode .mastery-state-learning .mastery-bar-fill { background: #f0b429; }
html.dark-mode .mastery-state-proficient .mastery-state { color: #7FB6F0; }
html.dark-mode .mastery-state-proficient .mastery-bar-fill { background: #2A82C5; }
html.dark-mode .mastery-state-mastered .mastery-state { color: #5fd08a; }
html.dark-mode .mastery-state-mastered .mastery-bar-fill { background: #34b36a; }

/* ==================== Deck Cards ==================== */

.stats-deck-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2xl, 32px);
}

.stats-deck-grid {
  display: flex;
  flex-direction: column;
  gap: var(--sp-md, 12px);
}

.stats-deck-card {
  padding: var(--sp-lg, 16px);
  background: var(--color-surface, #ffffff);
  border: 1px solid var(--color-border, #d8dde2);
  border-radius: var(--radius-lg, 12px);
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.08));
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm, 8px);
}

.stats-deck-header {
  display: flex;
  align-items: center;
  gap: var(--sp-sm, 8px);
}

.stats-deck-medal {
  font-size: 1.4em;
  line-height: 1;
  flex-shrink: 0;
}

.stats-deck-effort-icon {
  flex-shrink: 0;
  min-width: 1.4em;
  color: #8a5a00;
  font-size: 1.2em;
  line-height: 1;
  text-align: center;
}

.stats-deck-title {
  font-weight: 600;
  font-size: 1em;
  color: var(--color-text, #111111);
  word-break: break-word;
}

.stats-deck-stats {
  font-size: 0.9em;
  color: var(--color-text-muted, #595959);
}

.stats-deck-practice {
  align-self: flex-start;
  margin-top: var(--sp-xs, 4px);
}

html.dark-mode .stats-deck-card {
  background: var(--color-surface, #1e1e1e);
  border-color: var(--color-border, #333333);
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.4));
}

html.dark-mode .stats-deck-title {
  color: var(--color-text, #e6edf3);
}

html.dark-mode .stats-deck-effort-icon {
  color: #f0c040;
}

html.dark-mode .stats-deck-stats {
  color: var(--color-text-muted, #b0b0b0);
}

/* ==================== Selection Basket ==================== */

.stats-basket-bar {
  position: sticky;
  bottom: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-md, 12px);
  justify-content: space-between;
  padding: var(--sp-md, 12px) var(--sp-lg, 16px);
  background: var(--color-surface, #ffffff);
  border: 1px solid var(--color-border, #d8dde2);
  border-radius: var(--radius-lg, 12px);
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.10));
  margin-top: var(--sp-lg, 16px);
}

.stats-basket-count {
  font-weight: 600;
  color: var(--color-text, #111111);
}

.stats-basket-actions {
  display: flex;
  gap: var(--sp-sm, 8px);
  flex-wrap: wrap;
  align-items: center;
  margin-top: var(--sp-md, 12px);
}

html.dark-mode .stats-basket-bar {
  background: var(--color-surface, #1e1e1e);
  border-color: var(--color-border, #333333);
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.5));
}

html.dark-mode .stats-basket-count {
  color: var(--color-text, #e6edf3);
}

/* Disabled state for the start workout link-as-button */
a.gym-btn[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==================== Focus Rings ==================== */
/*
 * WCAG 2.4.7 / 2.4.11 — visible focus for all interactive elements.
 * The project default is a 3px outline + 2px offset in --focus-color.
 */

.stats-q-check:focus-visible,
.stats-q-check:focus {
  outline: var(--focus-width, 3px) solid var(--focus-color, #2774AE);
  outline-offset: var(--focus-offset, 2px);
}

/* ==================== Responsive ==================== */

@media (max-width: 700px) {
  .stats-questions-grid {
    grid-template-columns: 1fr;
  }

  .stats-deck-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .stats-tiles {
    flex-direction: column;
  }

  .stats-tile {
    flex: 1 1 auto;
    min-width: 0;
  }

  .stats-q-row {
    grid-template-columns: 24px minmax(0, 1fr);
  }

  .stats-acc-bar-track {
    display: none;
  }

  .stats-diff-table th:last-child,
  .stats-diff-table td:last-child {
    display: none;
  }

  .mastery-row {
    align-items: stretch;
    flex-direction: column;
  }

  .mastery-practice-btn {
    align-self: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mastery-bar-fill {
    transition: none;
  }
}

/* ==================== Print ==================== */

@media print {
  .stats-basket-bar {
    display: none;
  }

  .stats-section {
    break-inside: avoid;
  }
}