/* タイムレス・ライブラリー トップ — 「物語の書棚」 */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  --tl-shelf-dark: #1a1410;
  --tl-shelf-wood: #2c2118;
  --tl-shelf-wood-mid: #3d2e22;
  --tl-shelf-wood-light: #4a3829;
  --tl-shelf-leather: #352820;
  --tl-shelf-gold: #c4a574;
  --tl-shelf-gold-dim: rgba(196, 165, 116, 0.55);
  --tl-shelf-paper: #ede4d3;
  --tl-shelf-ink: #e8dcc8;
  --tl-shelf-ink-muted: rgba(232, 220, 200, 0.65);
  --tl-font-en: 'Playfair Display', 'Georgia', serif;
}

body.tl-body--shelf {
  background-color: var(--tl-shelf-dark);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% 0%, rgba(74, 56, 41, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse 80% 50% at 10% 100%, rgba(0, 0, 0, 0.35) 0%, transparent 50%),
    repeating-linear-gradient(
      92deg,
      transparent,
      transparent 18px,
      rgba(0, 0, 0, 0.04) 18px,
      rgba(0, 0, 0, 0.04) 19px
    ),
    linear-gradient(175deg, var(--tl-shelf-wood-light) 0%, var(--tl-shelf-wood) 35%, var(--tl-shelf-dark) 100%);
  color: var(--tl-shelf-ink);
}

body.tl-body--shelf::before {
  background-image:
    radial-gradient(circle at 30% 20%, rgba(196, 165, 116, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(0, 0, 0, 0.2) 0%, transparent 50%);
}

body.tl-body--shelf::after {
  opacity: 0.09;
}

/* ── 共通ナビ（書棚ページ） ── */

body.tl-body--shelf .tl-nav {
  position: sticky;
  top: 0;
  z-index: 200;
}

/* ── ヒーロー（特集枠） ── */

.tl-shelf-hero {
  position: relative;
  min-height: min(88vh, 52rem);
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  justify-items: center;
  gap: clamp(2rem, 5vw, 3.5rem);
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.25rem, 4vw, 2.5rem) clamp(3rem, 8vw, 5rem);
  max-width: 72rem;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .tl-shelf-hero {
    grid-template-columns: 1fr 1fr;
    text-align: left;
  }
}

.tl-shelf-hero__book-wrap {
  perspective: 1200px;
  display: flex;
  justify-content: center;
  width: 100%;
}

.tl-shelf-hero__book {
  position: relative;
  width: min(16rem, 72vw);
  transform: translateZ(0) rotateY(-8deg) translateY(-0.5rem);
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  filter: drop-shadow(0 28px 48px rgba(0, 0, 0, 0.55)) drop-shadow(0 8px 16px rgba(0, 0, 0, 0.3));
  animation: tl-book-float 5s ease-in-out infinite;
}

.tl-shelf-hero__book:hover {
  transform: rotateY(-4deg) translateY(-1rem) scale(1.02);
  animation-play-state: paused;
}

@keyframes tl-book-float {
  0%,
  100% {
    transform: rotateY(-8deg) translateY(-0.5rem);
  }
  50% {
    transform: rotateY(-6deg) translateY(-1.25rem);
  }
}

.tl-shelf-hero__cover {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 2px 6px 6px 2px;
  border: 1px solid rgba(196, 165, 116, 0.2);
  background: var(--tl-shelf-paper);
}

.tl-shelf-hero__book::before {
  content: '';
  position: absolute;
  top: 0;
  left: -0.65rem;
  width: 0.65rem;
  height: 100%;
  background: linear-gradient(90deg, #1a1410 0%, #3d2e22 40%, #2c2118 100%);
  border-radius: 2px 0 0 2px;
  box-shadow: inset -2px 0 4px rgba(0, 0, 0, 0.4);
}

.tl-shelf-hero__book::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0%, transparent 45%, rgba(0, 0, 0, 0.08) 100%);
  border-radius: inherit;
  pointer-events: none;
}

.tl-shelf-hero__copy {
  max-width: 26rem;
  text-align: center;
}

@media (min-width: 768px) {
  .tl-shelf-hero__copy {
    text-align: left;
  }
}

.tl-shelf-hero__label {
  font-family: var(--tl-font-en);
  font-size: 0.72rem;
  font-style: italic;
  letter-spacing: 0.2em;
  color: var(--tl-shelf-gold);
  margin: 0 0 0.75rem;
}

.tl-shelf-hero__catch {
  font-size: clamp(1.35rem, 3.5vw, 1.85rem);
  font-weight: 600;
  line-height: 1.75;
  letter-spacing: 0.1em;
  margin: 0 0 1rem;
}

.tl-shelf-hero__catch-en {
  display: block;
  font-family: var(--tl-font-en);
  font-size: clamp(0.85rem, 2vw, 1rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.06em;
  color: var(--tl-shelf-ink-muted);
  margin-top: 0.5rem;
}

.tl-shelf-hero__meta {
  font-size: 0.85rem;
  color: var(--tl-shelf-ink-muted);
  line-height: 1.9;
  margin: 0 0 1.75rem;
}

.tl-shelf-hero__meta strong {
  color: var(--tl-shelf-ink);
  font-weight: 500;
}

.tl-shelf-hero__cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.85rem 2rem;
  font-family: var(--tl-font-en);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--tl-shelf-dark);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.15) 0%, transparent 40%),
    var(--tl-shelf-paper);
  border: 1px solid rgba(196, 165, 116, 0.35);
  border-radius: 2px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    inset 0 -2px 0 rgba(0, 0, 0, 0.08),
    0 4px 12px rgba(0, 0, 0, 0.25);
  transition: transform 0.25s, box-shadow 0.25s;
}

.tl-shelf-hero__cta:hover {
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    inset 0 -2px 0 rgba(0, 0, 0, 0.08),
    0 8px 20px rgba(0, 0, 0, 0.35);
}

.tl-shelf-hero__cta-sub {
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  opacity: 0.7;
}

/* ── アーカイブ（本棚一覧） ── */

.tl-shelf-archive {
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.25rem, 4vw, 2.5rem) clamp(4rem, 8vw, 6rem);
  max-width: 72rem;
  margin: 0 auto;
}

.tl-shelf-archive__heading {
  text-align: center;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.tl-shelf-archive__heading h2 {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0.14em;
  margin: 0 0 0.5rem;
}

.tl-shelf-archive__heading p {
  font-family: var(--tl-font-en);
  font-size: 0.8rem;
  font-style: italic;
  color: var(--tl-shelf-ink-muted);
  letter-spacing: 0.08em;
  margin: 0;
}

.tl-shelf-archive__intro {
  max-width: 36rem;
  margin: 0 auto 2rem;
  text-align: center;
  font-size: 0.88rem;
  line-height: 1.95;
  color: var(--tl-shelf-ink-muted);
  letter-spacing: 0.06em;
}

.tl-shelf-archive--travel {
  padding-top: clamp(1rem, 3vw, 2rem);
  border-top: 1px solid rgba(196, 165, 116, 0.12);
}

.tl-shelf-row {
  position: relative;
  padding-bottom: 1.25rem;
}

.tl-shelf-row__surface {
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: 0;
  height: 0.85rem;
  background: linear-gradient(180deg, var(--tl-shelf-wood-mid) 0%, #1a1410 100%);
  border-radius: 2px;
  box-shadow:
    0 4px 12px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(196, 165, 116, 0.08);
}

.tl-shelf-row__surface::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 24px,
    rgba(0, 0, 0, 0.06) 24px,
    rgba(0, 0, 0, 0.06) 25px
  );
  border-radius: inherit;
}

.tl-shelf-row__books {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: clamp(0.35rem, 1.5vw, 0.65rem);
  min-height: 11rem;
  padding: 0 0.5rem 1.5rem;
}

/* ── 背表紙 ── */

.tl-spine {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: clamp(2.4rem, 5vw, 3rem);
  text-decoration: none;
  color: inherit;
  cursor: default;
  transform-origin: bottom center;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), filter 0.45s;
}

.tl-spine--active {
  cursor: pointer;
}

.tl-spine--active:hover,
.tl-spine--active:focus-visible {
  transform: translateY(-1.25rem) scale(1.04);
  z-index: 10;
}

.tl-spine--featured {
  width: clamp(2.8rem, 6vw, 3.5rem);
}

.tl-spine--featured.tl-spine--active {
  transform: translateY(-0.75rem);
}

.tl-spine--featured.tl-spine--active:hover,
.tl-spine--featured.tl-spine--active:focus-visible {
  transform: translateY(-1.75rem) scale(1.06);
}

.tl-spine__body {
  position: relative;
  width: 100%;
  height: var(--spine-height, 9rem);
  border-radius: 2px 3px 3px 2px;
  background: var(--spine-color, #5c4033);
  box-shadow:
    inset 2px 0 4px rgba(255, 255, 255, 0.08),
    inset -2px 0 6px rgba(0, 0, 0, 0.25),
    2px 4px 8px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  transition: box-shadow 0.45s;
}

.tl-spine--active:hover .tl-spine__body,
.tl-spine--active:focus-visible .tl-spine__body {
  box-shadow:
    inset 2px 0 4px rgba(255, 255, 255, 0.12),
    inset -2px 0 6px rgba(0, 0, 0, 0.2),
    0 12px 28px rgba(0, 0, 0, 0.45);
}

.tl-spine__body::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, transparent 30%, rgba(0, 0, 0, 0.12) 100%);
}

.tl-spine__title-vertical {
  position: absolute;
  inset: 0.5rem 0.2rem;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  line-height: 1.4;
  color: rgba(255, 248, 235, 0.85);
  overflow: hidden;
  text-overflow: ellipsis;
}

.tl-spine--featured .tl-spine__title-vertical {
  font-size: 0.62rem;
  font-weight: 600;
}

.tl-spine__cover {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.5rem);
  width: 5.5rem;
  aspect-ratio: 3 / 4;
  transform: translateX(-50%) translateY(0.5rem) scale(0.92);
  object-fit: cover;
  border-radius: 2px;
  border: 1px solid rgba(196, 165, 116, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
  z-index: 5;
}

.tl-spine--active:hover .tl-spine__cover,
.tl-spine--active:focus-visible .tl-spine__cover {
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

.tl-spine__tooltip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.35rem);
  transform: translateX(-50%) translateY(0.25rem);
  min-width: 9rem;
  padding: 0.6rem 0.75rem;
  font-size: 0.68rem;
  line-height: 1.6;
  text-align: center;
  letter-spacing: 0.06em;
  color: var(--tl-shelf-dark);
  background: var(--tl-shelf-paper);
  border: 1px solid rgba(196, 165, 116, 0.3);
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s, transform 0.35s;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  z-index: 6;
}

.tl-spine--active:hover .tl-spine__tooltip,
.tl-spine--active:focus-visible .tl-spine__tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.tl-spine--has-cover:hover .tl-spine__tooltip {
  bottom: calc(100% + 5.5rem);
}

.tl-spine__tooltip-title {
  display: block;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.tl-spine__tooltip-meta {
  color: rgba(44, 36, 25, 0.65);
  font-size: 0.62rem;
}

.tl-spine--placeholder {
  opacity: 0.45;
}

.tl-spine--placeholder .tl-spine__title-vertical {
  font-family: var(--tl-font-en);
  font-style: italic;
  font-size: 0.5rem;
  letter-spacing: 0.08em;
}

/* ── 紙オーバーレイ（コンテンツ領域） ── */

.tl-shelf-paper-overlay {
  position: relative;
  z-index: 2;
}

.tl-shelf-paper-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.92' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)' opacity='0.45'/%3E%3C/svg%3E");
  opacity: 0.045;
  mix-blend-mode: overlay;
  z-index: 50;
}

/* ── フッター ── */

.tl-shelf-footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  font-size: 0.72rem;
  color: var(--tl-shelf-ink-muted);
  letter-spacing: 0.1em;
  border-top: 1px solid rgba(196, 165, 116, 0.08);
}

/* ── スクロールフェードイン ── */

[data-shelf-reveal] {
  opacity: 0;
  transform: translateY(1.25rem);
  transition:
    opacity 0.85s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-shelf-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .tl-shelf-row__books {
    min-height: 9rem;
  }

  .tl-spine__cover {
    width: 4.5rem;
  }

  .tl-spine--has-cover:hover .tl-spine__tooltip {
    bottom: calc(100% + 4.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .tl-shelf-hero__book {
    animation: none;
  }

  [data-shelf-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .tl-spine,
  .tl-spine__cover,
  .tl-spine__tooltip {
    transition: none;
  }
}