/* タイムレス・ライブラリー — 共通スタイル */

@import url('https://fonts.googleapis.com/css2?family=Zen+Old+Mincho:wght@400;500;600;700&display=swap');

:root {
  --tl-wood-dark: #3d2b1f;
  --tl-wood-mid: #5c4033;
  --tl-wood-light: #7a5c44;
  --tl-paper: #f4ead8;
  --tl-paper-warm: #ebe0cc;
  --tl-ink: #2c2419;
  --tl-ink-muted: #5a4f42;
  --tl-accent: #6b5344;
  --tl-film-grain: rgba(28, 22, 16, 0.04);
  --tl-font: 'Zen Old Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --tl-nav-height: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body.tl-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--tl-font);
  color: var(--tl-ink);
  background-color: var(--tl-wood-mid);
  background-image:
    linear-gradient(
      90deg,
      rgba(0, 0, 0, 0.08) 0%,
      transparent 8%,
      transparent 92%,
      rgba(0, 0, 0, 0.08) 100%
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 3px,
      rgba(0, 0, 0, 0.03) 3px,
      rgba(0, 0, 0, 0.03) 4px
    ),
    linear-gradient(180deg, var(--tl-wood-light) 0%, var(--tl-wood-mid) 40%, var(--tl-wood-dark) 100%);
  line-height: 1.85;
  letter-spacing: 0.04em;
}

body.tl-body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 0, 0, 0.06) 0%, transparent 45%);
  opacity: 0.9;
}

body.tl-body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
  opacity: 0.06;
  mix-blend-mode: multiply;
}

.tl-page {
  position: relative;
  z-index: 2;
  min-height: 100vh;
}

/* ── 共通ナビゲーション ── */

.tl-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(to bottom, rgba(250, 247, 242, 0.92), rgba(245, 240, 235, 0.88));
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(90, 79, 66, 0.15);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.tl-nav__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.5rem 1rem 0.75rem;
}

.tl-nav__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--tl-ink);
  margin-bottom: 0.35rem;
}

.tl-nav__brand-title {
  font-size: clamp(0.85rem, 2vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.16em;
}

.tl-nav__brand-sub {
  font-size: 0.6rem;
  color: var(--tl-ink-muted);
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.tl-nav__menu {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tl-nav__group {
  position: relative;
}

.tl-nav__group-label {
  display: block;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--tl-ink-muted);
  cursor: default;
  border: none;
  background: none;
  font-family: inherit;
  letter-spacing: 0.06em;
}

.tl-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 11rem;
  padding: 0.35rem 0;
  margin: 0;
  list-style: none;
  background: rgba(250, 247, 242, 0.96);
  border: 1px solid rgba(90, 79, 66, 0.12);
  border-radius: 0.5rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}

.tl-nav__group:hover .tl-nav__dropdown,
.tl-nav__group:focus-within .tl-nav__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.tl-nav__link {
  display: block;
  padding: 0.45rem 1rem;
  font-size: 0.78rem;
  color: var(--tl-ink-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s;
}

.tl-nav__link:hover,
.tl-nav__link[aria-current='page'] {
  background: rgba(107, 83, 68, 0.08);
  color: var(--tl-ink);
}

/* ── タイムレス・ライブラリー内カテゴリナビ（絵本・童話 / 紀行・連載） ── */

.tl-section-nav {
  position: sticky;
  top: var(--tl-nav-height, 4.5rem);
  z-index: 90;
  background: rgba(244, 234, 216, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(90, 79, 66, 0.12);
}

.tl-section-nav--shelf {
  background: rgba(26, 20, 16, 0.82);
  border-bottom-color: rgba(196, 165, 116, 0.15);
}

.tl-section-nav--shelf .tl-section-nav__label,
.tl-section-nav--shelf .tl-section-nav__link {
  color: rgba(232, 220, 200, 0.75);
}

.tl-section-nav--shelf .tl-section-nav__link.is-active,
.tl-section-nav--shelf .tl-section-nav__link[aria-current='page'] {
  color: #f4ead8;
  background: rgba(196, 165, 116, 0.14);
  border-color: rgba(196, 165, 116, 0.35);
}

.tl-section-nav__inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0.55rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.65rem 1rem;
}

.tl-section-nav__label {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--tl-ink-muted);
}

.tl-section-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tl-section-nav__link {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--tl-ink-muted);
  border: 1px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.tl-section-nav__link:hover {
  color: var(--tl-ink);
  background: rgba(252, 250, 242, 0.65);
}

.tl-section-nav__link.is-active,
.tl-section-nav__link[aria-current='page'] {
  color: var(--tl-ink);
  background: rgba(252, 250, 242, 0.95);
  border-color: rgba(90, 79, 66, 0.2);
}

/* ── 紙面コンテナ ── */

.tl-paper {
  position: relative;
  max-width: 52rem;
  margin: 2rem auto 3rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.35) 0%, transparent 50%),
    var(--tl-paper);
  border-radius: 2px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.5) inset,
    0 24px 48px rgba(0, 0, 0, 0.18),
    0 4px 12px rgba(0, 0, 0, 0.08);
}

.tl-paper::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(120, 100, 80, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(100, 80, 60, 0.05) 0%, transparent 35%);
  pointer-events: none;
}

.tl-paper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)' opacity='0.4'/%3E%3C/svg%3E");
  opacity: 0.07;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.tl-paper > * {
  position: relative;
  z-index: 1;
}

/* ── トップページ ── */

.tl-hero {
  text-align: center;
  padding: 1rem 0 2rem;
}

.tl-hero__eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--tl-accent);
  margin: 0 0 0.75rem;
}

.tl-hero__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  margin: 0 0 1rem;
  letter-spacing: 0.12em;
}

.tl-hero__lead {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: var(--tl-ink-muted);
  max-width: 36rem;
  margin: 0 auto 2rem;
  line-height: 2;
}

.tl-catalog {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.tl-catalog__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(90, 79, 66, 0.12);
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.tl-catalog__item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.tl-catalog__icon {
  font-size: 2rem;
  line-height: 1;
}

.tl-catalog__meta h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  letter-spacing: 0.08em;
}

.tl-catalog__meta p {
  font-size: 0.85rem;
  color: var(--tl-ink-muted);
  margin: 0;
}

.tl-catalog__arrow {
  font-size: 1.25rem;
  color: var(--tl-accent);
  opacity: 0.6;
}

.tl-footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  font-size: 0.75rem;
  color: rgba(244, 234, 216, 0.7);
  letter-spacing: 0.08em;
}

@media (max-width: 640px) {
  .tl-nav__menu {
    flex-direction: column;
    align-items: stretch;
  }

  .tl-nav__dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: none;
    border: none;
    background: transparent;
    padding-left: 0.5rem;
  }

  .tl-catalog__item {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .tl-catalog__item {
    transition: none;
  }
}