/* ============================================================
   TWF Library — The Basement Reading List
   Design: dark cinematic base (Basement DNA) + gold accent
   ============================================================ */

:root {
  --gold:       #D4AF37;
  --gold-dark:  #9A7B0A;
  --gold-glow:  rgba(212, 175, 55, 0.35);
  --gold-dim:   rgba(212, 175, 55, 0.12);
  --black:      #0a0a0c;
  --dark:       #0d0d0f;
  --dark-card:  #141416;
  --dark-mid:   #1a1a1e;
  --dark-border:#2a2a30;
  --white:      #f0f0f2;
  --gray:       #909098;
  --gray-dim:   #5a5a62;
  --font-display: 'Bebas Neue', sans-serif;
  --font-body:    'Source Sans 3', sans-serif;
  --font-accent:  'Special Elite', cursive;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { cursor: pointer; font-family: var(--font-body); border: none; background: none; }

/* ── Nav ── */
#navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: rgba(10,10,12,0.97);
  border-bottom: 1px solid var(--dark-border);
  backdrop-filter: blur(8px);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  color: var(--white);
}
.nav-logo span { color: var(--gold); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--gold); }

.mobile-menu-btn {
  display: none;
  font-size: 1.4rem;
  color: var(--white);
  background: none;
  border: none;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 60px;
  left: 0; right: 0;
  background: rgba(10,10,12,0.98);
  border-bottom: 1px solid var(--dark-border);
  z-index: 99;
  padding: 1rem 2rem 1.5rem;
}
.mobile-menu.open { display: block; }
.mobile-menu ul { list-style: none; }
.mobile-menu ul li + li { margin-top: 1rem; }
.mobile-menu ul a {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
}
.mobile-menu ul a:hover { color: var(--gold); }

/* ── Hero ── */
.hero {
  padding: 5rem 2rem 3.5rem;
  text-align: center;
  background: linear-gradient(to bottom, rgba(10,10,12,0.6) 0%, var(--black) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 30%, var(--gold-glow), transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--font-accent);
  font-size: 0.9rem;
  color: var(--gold);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--white);
  text-shadow: 0 0 60px var(--gold-glow);
  margin-bottom: 1rem;
}
.hero h1 span { color: var(--gold); }

.hero-sub {
  font-family: var(--font-accent);
  font-size: 1rem;
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2.5rem;
}
.stat {
  text-align: center;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--gold);
  line-height: 1;
}
.stat-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-dim);
  margin-top: 0.2rem;
}

/* ── View Toggle ── */
.view-toggle-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--dark-border);
  background: var(--dark);
}

.view-tabs {
  display: flex;
  gap: 0.25rem;
  background: var(--black);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  padding: 3px;
}

.view-tab {
  padding: 0.4rem 1.1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray);
  border-radius: 4px;
  transition: all 0.2s;
}
.view-tab.active {
  background: var(--gold);
  color: var(--black);
}
.view-tab:not(.active):hover { color: var(--white); }

.item-count {
  font-size: 0.8rem;
  color: var(--gray-dim);
  letter-spacing: 0.05em;
}
.item-count strong { color: var(--gold); }

/* ── Main Layout ── */
.library-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - 300px);
}

/* ── Sidebar ── */
.sidebar {
  background: var(--dark);
  border-right: 1px solid var(--dark-border);
  padding: 1.5rem 1.25rem;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--dark-border) transparent;
}

.sidebar-section + .sidebar-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--dark-border);
}

.sidebar-heading {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.search-box {
  position: relative;
}
.search-box input {
  width: 100%;
  background: var(--black);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  padding: 0.55rem 0.75rem 0.55rem 2.2rem;
  font-size: 0.85rem;
  color: var(--white);
  font-family: var(--font-body);
  transition: border-color 0.2s;
  outline: none;
}
.search-box input::placeholder { color: var(--gray-dim); }
.search-box input:focus { border-color: var(--gold); }
.search-icon {
  position: absolute;
  left: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-dim);
  font-size: 0.85rem;
  pointer-events: none;
}

.filter-options { display: flex; flex-direction: column; gap: 0.5rem; }

.filter-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--gray);
  cursor: pointer;
  transition: color 0.2s;
  padding: 0.2rem 0;
}
.filter-option:hover { color: var(--white); }
.filter-option input[type="radio"],
.filter-option input[type="checkbox"] { display: none; }

.filter-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 2px solid var(--gray-dim);
  transition: all 0.2s;
  flex-shrink: 0;
}
.filter-option.active .filter-dot,
.filter-option input:checked ~ .filter-dot {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 6px var(--gold-glow);
}
.filter-option.active { color: var(--white); }

/* Subject filters are multi-select (OR) — square boxes, not radio dots */
.filter-box {
  width: 13px; height: 13px;
  border-radius: 3px;
  border: 2px solid var(--gray-dim);
  transition: all 0.2s;
  flex-shrink: 0;
  position: relative;
}
.subject-check.active .filter-box {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 6px var(--gold-glow);
}
.subject-check.active .filter-box::after {
  content: '';
  position: absolute;
  left: 3px; top: 0px;
  width: 3px; height: 7px;
  border: solid #14140f;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.subject-check:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  border-radius: 3px;
}

.filter-count {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--gray-dim);
}

.sort-select {
  width: 100%;
  background: var(--black);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: var(--white);
  font-family: var(--font-body);
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
}
.sort-select:focus { border-color: var(--gold); }
.sort-select option { background: var(--dark-card); }

/* ── Book Grid ── */
.content-area {
  padding: 1.5rem;
  background: var(--black);
}

#books-view,
#episodes-view { display: none; }
#books-view.active,
#episodes-view.active { display: block; }

.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.book-card {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.book-card:hover {
  border-color: var(--gold);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.5), 0 0 20px var(--gold-dim);
}

.book-cover {
  aspect-ratio: 2/3;
  background: var(--dark-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  border-bottom: 1px solid var(--dark-border);
}
.book-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.book-cover-placeholder {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: linear-gradient(135deg, var(--dark-mid) 0%, #0f0f12 100%);
  border-left: 4px solid var(--gold);
  text-align: center;
  gap: 0.5rem;
}
.placeholder-title {
  font-family: var(--font-accent);
  font-size: 0.8rem;
  color: var(--white);
  line-height: 1.4;
  word-break: break-word;
}
.placeholder-author {
  font-size: 0.68rem;
  color: var(--gold);
  letter-spacing: 0.05em;
}

.type-badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  background: rgba(10,10,12,0.85);
  border: 1px solid var(--dark-border);
  color: var(--gray);
}
.type-badge.graphic_novel {
  border-color: var(--gold);
  color: var(--gold);
}

.book-info {
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.book-title {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--white);
  line-height: 1.2;
}

.book-author {
  font-size: 0.78rem;
  color: var(--gray);
}

.book-year {
  font-size: 0.72rem;
  color: var(--gray-dim);
}

.book-episodes {
  margin-top: auto;
  padding-top: 0.6rem;
  border-top: 1px solid var(--dark-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.ep-tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  background: var(--gold-dim);
  color: var(--gold);
  border: 1px solid rgba(212,175,55,0.25);
  transition: background 0.2s;
}
.ep-tag:hover {
  background: rgba(212,175,55,0.25);
}

.ep-tag { cursor: pointer; }

/* Landing highlight after an ep-tag jump */
.episode-accordion.flash {
  animation: ep-flash 2s ease-out;
}
@keyframes ep-flash {
  0%   { box-shadow: 0 0 0 2px var(--gold), 0 0 18px var(--gold-glow); }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.book-actions {
  padding: 0.75rem 0.85rem;
  border-top: 1px solid var(--dark-border);
}

.btn-amazon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  padding: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--black);
  background: var(--gold);
  border-radius: 4px;
  transition: background 0.2s, box-shadow 0.2s;
}
.btn-amazon:hover {
  background: #e8c94a;
  box-shadow: 0 0 14px var(--gold-glow);
}

.btn-amazon-soon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-dim);
  border: 1px solid var(--dark-border);
  border-radius: 4px;
}

/* ── Episode view show filter bar ── */
.ep-show-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0 1.25rem;
  border-bottom: 1px solid var(--dark-border);
  margin-bottom: 1rem;
}

.ep-show-btn {
  padding: 0.45rem 1.2rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 20px;
  transition: color 0.2s, background 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.ep-show-btn:hover {
  color: var(--white);
  border-color: var(--gray);
}
.ep-show-btn.active {
  color: var(--black);
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 10px var(--gold-glow);
}

/* ── Episodes View ── */
.episode-list-view {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.episode-accordion {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.episode-accordion.open { border-color: var(--gold); }

.episode-accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: background 0.2s;
}
.episode-accordion-header:hover { background: var(--dark-mid); }

.ep-header-left { display: flex; align-items: center; gap: 1rem; }
.ep-number {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--gold);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.ep-meta { display: flex; flex-direction: column; gap: 0.15rem; }
.ep-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
}
.ep-guest {
  font-size: 0.78rem;
  color: var(--gray);
}

.ep-header-right { display: flex; align-items: center; gap: 1rem; }
.ep-book-count {
  font-size: 0.75rem;
  color: var(--gray-dim);
  white-space: nowrap;
}
.ep-chevron {
  color: var(--gray-dim);
  transition: transform 0.25s;
  font-size: 0.85rem;
}
.episode-accordion.open .ep-chevron { transform: rotate(180deg); }

.episode-accordion-body {
  display: none;
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--dark-border);
}
.episode-accordion.open .episode-accordion-body { display: block; }

.ep-books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

/* Reuse book card styles in episode view */
.ep-books-grid .book-card { font-size: 0.9em; }

/* ── YouTube Episode Card ── */
.yt-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  background: var(--dark-mid);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.yt-card:hover {
  border-color: #FF0000;
  box-shadow: 0 0 18px rgba(255, 0, 0, 0.15);
}

.yt-thumb-wrap {
  position: relative;
  flex-shrink: 0;
  width: 120px;
  aspect-ratio: 16/9;
  border-radius: 4px;
  overflow: hidden;
  background: var(--black);
}
.yt-thumb {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.yt-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--white);
  background: rgba(0,0,0,0.45);
  opacity: 0;
  transition: opacity 0.2s;
}
.yt-card:hover .yt-play-btn { opacity: 1; }

.yt-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.yt-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #FF0000;
}
.yt-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  color: var(--white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.yt-guest {
  font-size: 0.78rem;
  color: var(--gray);
}

.yt-cta {
  flex-shrink: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-dim);
  white-space: nowrap;
  transition: color 0.2s;
}
.yt-card:hover .yt-cta { color: var(--white); }

@media (max-width: 500px) {
  .yt-thumb-wrap { width: 80px; }
  .yt-cta { display: none; }
}

/* ── Empty state ── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem 2rem;
  color: var(--gray-dim);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.empty-state p { font-family: var(--font-accent); font-size: 1rem; }

/* ── Disclaimer ── */
.disclaimer {
  background: var(--dark);
  border-top: 1px solid var(--dark-border);
  padding: 2rem;
  text-align: center;
}
.disclaimer-inner {
  max-width: 700px;
  margin: 0 auto;
}
.disclaimer-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.6rem;
  opacity: 0.7;
}
.disclaimer p {
  font-family: var(--font-accent);
  font-size: 0.82rem;
  color: var(--gray-dim);
  line-height: 1.7;
}
.disclaimer p.affiliate-note {
  margin-top: 0.8rem;
  font-size: 0.72rem;
  opacity: 0.75;
}

/* ── Footer ── */
footer {
  background: var(--black);
  border-top: 1px solid var(--dark-border);
  padding: 1.5rem 2rem;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--gray-dim);
  margin-bottom: 0.4rem;
}
.footer-logo span { color: var(--gold); }
footer p {
  font-size: 0.75rem;
  color: var(--gray-dim);
}
footer a { color: var(--gold); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .library-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--dark-border);
    display: none;
  }
  .sidebar.mobile-open { display: block; }
  .mobile-filter-btn {
    display: inline-flex !important;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.4rem 1rem;
    border: 1px solid var(--dark-border);
    border-radius: 4px;
    color: var(--gray);
    background: var(--dark-card);
  }
}

@media (min-width: 901px) {
  .mobile-filter-btn { display: none !important; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .hero { padding: 3.5rem 1.25rem 2.5rem; }
  .hero-stats { gap: 1.5rem; }
  .view-toggle-bar { padding: 1rem; }
  .content-area { padding: 1rem; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
}