/* ─────────────────────────────────────────────────────────────────
   bookshelf.css
   Place at: static/css/bookshelf.css
   ───────────────────────────────────────────────────────────────── */

/* ── Variables ───────────────────────────────────────────────────── */
:root {
  --bs-gap: clamp(1rem, 2vw, 1.5rem);
  --bs-radius: 6px;
  --bs-cover-ratio: 3 / 4;
  --bs-text: #1a1a1a;
  --bs-muted: #6b7280;
  --bs-border: #e5e7eb;
  --bs-accent: #1a1a1a;
  --bs-pill-active-bg: #1a1a1a;
  --bs-pill-active-text: #ffffff;
  --bs-badge-audio: #2563eb;
  --bs-badge-story: #7c3aed;
  --bs-chart-read: #15803d;
  --bs-chart-listened: #2563eb;
  --bs-placeholder-bg: #f3f4f6;
  --bs-placeholder-fg: #d1d5db;
  --bs-font-sans: 'DM Sans', system-ui, sans-serif;
  --bs-font-serif: 'DM Serif Display', Georgia, serif;
  --bs-transition: 150ms ease;
}

/* ── Page shell ──────────────────────────────────────────────────── */
.bookshelf-page {
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--bs-gap);
  padding-block: 3rem 5rem;
  font-family: var(--bs-font-sans);
  color: var(--bs-text);
}

/* ── Header ──────────────────────────────────────────────────────── */
.bookshelf-header {
  margin-bottom: 3rem;
}

.bookshelf-title {
  font-family: var(--bs-font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.bookshelf-intro {
  font-size: 1.0625rem;
  color: var(--bs-muted);
  max-width: 60ch;
  line-height: 1.65;
  margin-bottom: 0.5rem;
}

.bookshelf-meta {
  font-size: 0.875rem;
  color: var(--bs-muted);
  margin: 0;
}

/* ── Sticky controls bar ─────────────────────────────────────────── */
.bookshelf-controls {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bs-border);
  padding-block: 0.875rem;
  margin-inline: calc(var(--bs-gap) * -1);
  padding-inline: var(--bs-gap);
  margin-bottom: 2rem;
}

/* ── Search ──────────────────────────────────────────────────────── */
.bs-search-wrap {
  position: relative;
  margin-bottom: 0.75rem;
}

.bs-search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  color: var(--bs-muted);
  pointer-events: none;
}

.bs-search {
  width: 100%;
  padding: 0.5rem 0.75rem 0.5rem 2.25rem;
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius);
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--bs-text);
  background: #fff;
  outline: none;
  box-sizing: border-box;
  transition: border-color var(--bs-transition), box-shadow var(--bs-transition);
}

.bs-search:focus {
  border-color: var(--bs-accent);
  box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.08);
}

.bs-search::placeholder {
  color: var(--bs-muted);
}

/* ── Filter row ──────────────────────────────────────────────────── */
.bs-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.bs-filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.bs-filter-group--right {
  margin-left: auto;
}

.bs-filter-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--bs-muted);
  white-space: nowrap;
}

/* ── Pills ───────────────────────────────────────────────────────── */
.bs-pill-group {
  display: flex;
  gap: 0.25rem;
}

.bs-pill {
  padding: 0.3125rem 0.75rem;
  border: 1px solid var(--bs-border);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-family: inherit;
  background: #fff;
  color: var(--bs-text);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--bs-transition), color var(--bs-transition), border-color var(--bs-transition);
}

.bs-pill:hover {
  border-color: var(--bs-accent);
}

.bs-pill.active {
  background: var(--bs-pill-active-bg);
  color: var(--bs-pill-active-text);
  border-color: var(--bs-pill-active-bg);
}

/* ── Selects ─────────────────────────────────────────────────────── */
.bs-select {
  padding: 0.3125rem 2rem 0.3125rem 0.625rem;
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius);
  font-size: 0.8125rem;
  font-family: inherit;
  color: var(--bs-text);
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.22 8.22a.75.75 0 011.06 0L10 11.94l3.72-3.72a.75.75 0 111.06 1.06l-4.25 4.25a.75.75 0 01-1.06 0L5.22 9.28a.75.75 0 010-1.06z'/%3E%3C/svg%3E") no-repeat right 0.5rem center / 1rem;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  outline: none;
  max-width: 14rem;
  transition: border-color var(--bs-transition);
}

.bs-select:focus {
  border-color: var(--bs-accent);
}

/* ── Result count ────────────────────────────────────────────────── */
.bs-count {
  font-size: 0.8125rem;
  color: var(--bs-muted);
  margin: 0.5rem 0 0;
  min-height: 1.25em;
}

/* ── Visually hidden (a11y) ─────────────────────────────────────── */
.bs-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Date range inputs ───────────────────────────────────────────── */
.bs-filter-group--dates {
  flex-wrap: wrap;
}

.bs-date-inputs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.bs-date-sep {
  color: var(--bs-muted);
  font-size: 0.875rem;
  user-select: none;
}

.bs-input-month {
  padding: 0.3125rem 0.5rem;
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius);
  font-size: 0.8125rem;
  font-family: inherit;
  color: var(--bs-text);
  background: #fff;
  outline: none;
  max-width: 9.5rem;
  transition: border-color var(--bs-transition);
}

.bs-input-month:focus {
  border-color: var(--bs-accent);
}

/* ── Chart section ───────────────────────────────────────────────── */
.bs-chart-section {
  margin-bottom: 2.5rem;
}

.bs-chart-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-bottom: 0.5rem;
}

.bs-chart-head__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.bs-chart-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.bs-pill--chart {
  font-size: 0.75rem;
  padding: 0.25rem 0.625rem;
}

.bs-chart-heading {
  font-family: var(--bs-font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  margin: 0;
  letter-spacing: -0.02em;
  color: var(--bs-text);
}

.bs-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--bs-muted);
}

.bs-chart-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

.bs-chart-legend__swatch {
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 2px;
  flex-shrink: 0;
}

.bs-chart-legend__swatch--read {
  background: var(--bs-chart-read);
}

.bs-chart-legend__swatch--listened {
  background: var(--bs-chart-listened);
}

.bs-chart-summary {
  font-size: 0.8125rem;
  color: var(--bs-muted);
  margin: 0 0 0.75rem;
}

.bs-chart-scroll {
  position: relative;
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
  /* Room below SVG so rotated x-axis labels are not clipped by the scrollport */
  padding-bottom: 1.5rem;
  margin-inline: calc(var(--bs-gap) * -1);
  padding-inline: var(--bs-gap);
  min-height: 14rem;
}

.bs-chart-scroll:focus-visible {
  outline: 2px solid var(--bs-accent);
  outline-offset: 2px;
}

.bs-chart-svg {
  display: block;
  overflow: visible;
  min-width: 100%;
  max-width: none;
  height: auto;
  vertical-align: top;
}

.bs-chart__rect--read {
  fill: var(--bs-chart-read);
  pointer-events: none;
}

.bs-chart__rect--listened {
  fill: var(--bs-chart-listened);
  pointer-events: none;
}

.bs-chart__hit {
  pointer-events: all;
  cursor: crosshair;
}

.bs-chart-tooltip {
  position: fixed;
  z-index: 50;
  max-width: 16rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--bs-radius);
  border: 1px solid var(--bs-border);
  background: #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
  font-size: 0.8125rem;
  line-height: 1.35;
  color: var(--bs-text);
  pointer-events: none;
}

.dark .bs-chart-tooltip {
  background: #1f1f1f;
  color: #f4f4f5;
  border-color: #3f3f46;
}

.bs-chart-tooltip div:first-child {
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.bs-chart__tick {
  fill: var(--bs-muted);
  font-family: var(--bs-font-sans);
  font-size: 11px;
  font-weight: 500;
}

/* ── Grid ────────────────────────────────────────────────────────── */
.bs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(9rem, 100%), 1fr));
  gap: var(--bs-gap);
}

/* ── Card ────────────────────────────────────────────────────────── */
.bs-card {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.bs-card__cover-wrap {
  position: relative;
  aspect-ratio: var(--bs-cover-ratio);
  border-radius: var(--bs-radius);
  overflow: hidden;
  background: var(--bs-placeholder-bg);
}

.bs-card__cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 300ms ease;
}

.bs-card:hover .bs-card__cover {
  transform: scale(1.03);
}

.bs-card__cover--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.bs-card__cover--placeholder svg {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--bs-placeholder-fg);
}

/* Short story — slightly faded with dashed purple border */
.bs-card--story .bs-card__cover-wrap {
  opacity: 0.82;
}

.bs-card--story .bs-card__cover-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px dashed rgba(124, 58, 237, 0.35);
  border-radius: var(--bs-radius);
  pointer-events: none;
}

/* ── Badges ──────────────────────────────────────────────────────── */
.bs-card__badges {
  position: absolute;
  top: 0.375rem;
  right: 0.375rem;
  display: flex;
  gap: 0.25rem;
}

.bs-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 999px;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
}

.bs-badge--audio {
  background: var(--bs-badge-audio);
  color: #fff;
}

.bs-badge--audio svg {
  width: 0.75rem;
  height: 0.75rem;
}

.bs-badge--story {
  background: var(--bs-badge-story);
  color: #fff;
}

/* ── Card info ───────────────────────────────────────────────────── */
.bs-card__info {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.bs-card__title {
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.bs-card__author {
  font-size: 0.75rem;
  color: var(--bs-muted);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bs-card__series {
  font-size: 0.6875rem;
  color: var(--bs-muted);
  margin: 0;
  font-style: italic;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bs-card__date {
  font-size: 0.6875rem;
  color: var(--bs-muted);
  margin: 0.125rem 0 0;
}

.bs-card__ol-link {
  font-size: 0.6875rem;
  color: var(--bs-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  margin-top: 0.125rem;
}

.bs-card__ol-link:hover {
  color: var(--bs-text);
}

/* ── Empty state ─────────────────────────────────────────────────── */
.bs-empty {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--bs-muted);
}

.bs-reset {
  margin-top: 1rem;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--bs-border);
  border-radius: var(--bs-radius);
  font-family: inherit;
  font-size: 0.875rem;
  background: #fff;
  cursor: pointer;
  transition: border-color var(--bs-transition), color var(--bs-transition);
}

.bs-reset:hover {
  border-color: var(--bs-accent);
  color: var(--bs-accent);
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .bs-filters {
    gap: 0.75rem;
  }

  .bs-filter-group--right {
    margin-left: 0;
  }

  .bs-chart-head__right {
    align-items: flex-start;
  }
}