/* ==========================================================================
   STATS PAGE
   ========================================================================== */

.stats-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.stats-header__user {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
}

.stats-header__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.stats-header__user h2 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  font-variation-settings: 'opsz' 24;
}

.year-select {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--text);
  background: var(--bg-surface);
  border: 1px solid var(--bg-inset);
  border-radius: var(--radius-sm);
  padding: 6px var(--space-md);
  cursor: pointer;
}

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

.big-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.big-stat {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--card-border);
}

.big-stat__value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
  font-variation-settings: 'opsz' 48;
}

.big-stat__label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* --- Stats Sections --- */

.stats-section {
  margin-bottom: var(--space-xl);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--card-border);
}

.stats-section__title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  font-variation-settings: 'opsz' 16;
}

/* Rating Distribution */

.dist-chart {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dist-bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.dist-bar__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
  width: 20px;
  text-align: right;
  flex-shrink: 0;
}

.dist-bar__track {
  flex: 1;
  height: 18px;
  background: var(--bg-warm);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.dist-bar__fill {
  height: 100%;
  background: var(--accent);
  border-radius: var(--radius-sm);
  transition: width 0.5s ease;
  min-width: 2px;
  opacity: 0.75;
}

.dist-bar__count {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--text-muted);
  width: 28px;
  flex-shrink: 0;
}

/* Monthly Chart */

.monthly-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 160px;
  padding-top: var(--space-md);
}

.month-bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}

.month-bar__fill {
  width: 100%;
  max-width: 44px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  transition: height 0.5s ease;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 0;
  opacity: 0.75;
}

.month-bar__value {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  color: #fff;
  font-weight: 600;
  padding-top: 3px;
}

.month-bar__label {
  font-size: 0.5625rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Category Cloud */

.category-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.category-tag {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-warm);
  padding: 4px 12px;
  border-radius: 100px;
}

.category-tag__count {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  color: var(--text-faint);
  margin-left: 4px;
}

/* Top Books */

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

.top-book {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 10px 0;
  border-bottom: 1px solid var(--bg-warm);
}

.top-book:last-child { border-bottom: none; }

.top-book__cover {
  width: 32px;
  height: 48px;
  object-fit: cover;
  border-radius: 2px;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.top-book__cover--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-warm);
  color: var(--text-faint);
}

.top-book__info { flex: 1; min-width: 0; }

.top-book__title {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.top-book__authors {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.top-book__rating {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  flex-shrink: 0;
  width: 72px;
}

.top-book__rating span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--rated);
  font-weight: 600;
}

/* --- Interactive Hints --- */

.stats-section__hint {
  font-size: 0.6875rem;
  color: var(--text-faint);
  margin-bottom: var(--space-sm);
  margin-top: -8px;
}

/* Clickable bars */
.dist-bar--clickable { cursor: pointer; }
.dist-bar--clickable:hover .dist-bar__fill { opacity: 1; }
.dist-bar--clickable:hover .dist-bar__label { color: var(--accent); }

.category-tag--clickable {
  cursor: pointer;
  transition: var(--transition);
}
.category-tag--clickable:hover {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent-medium);
}

.category-tag--more {
  cursor: pointer;
  color: var(--accent);
  background: var(--accent-light);
}

/* See all button */
.see-all-btn {
  display: block;
  margin-top: var(--space-md);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm) 0;
  transition: var(--transition);
}
.see-all-btn:hover { text-decoration: underline; }

/* --- Drill-down Panel --- */

.drilldown {
  margin-top: var(--space-xl);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--card-border);
  border-top: 3px solid var(--accent);
}

.drilldown__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.drilldown__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  font-variation-settings: 'opsz' 20;
}

.drilldown__count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}

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

.drilldown__sort {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--text);
  background: var(--bg-warm);
  border: 1px solid var(--bg-inset);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  cursor: pointer;
}

.drilldown__sort:focus { outline: none; border-color: var(--accent); }

.drilldown__close {
  font-size: 0.75rem;
  padding: 4px 8px;
}

.drilldown__empty {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.top-book--clickable {
  cursor: pointer;
  transition: var(--transition);
}

.top-book--clickable:hover {
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
}

.top-book__date {
  font-size: 0.6875rem;
  color: var(--text-faint);
  margin-top: 2px;
}

.top-book__unrated {
  font-size: 0.6875rem;
  color: var(--text-faint);
  font-style: italic;
}

/* --- Stats Picker --- */

.stats-picker {
  text-align: center;
  padding: var(--space-xl);
}

.stats-picker p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.stats-picker__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-sm);
  text-align: left;
}