/* =========================================================
   月光書房 — 十二夜の物語集
   A literary anthology stylesheet (dark night-sky default)
   ========================================================= */

:root {
  --bg:      #0b1020;
  --bg-2:    #121a31;
  --panel:   #141d36;
  --panel-2: #18223f;
  --ink:     #e9e7df;
  --ink-soft:#cdd3e0;
  --muted:   #93a0bd;
  --faint:   #6b768f;
  --gold:    #d3b676;
  --comet:   #9cc4ee;
  --line:    rgba(233, 231, 223, 0.12);
  --line-2:  rgba(233, 231, 223, 0.06);
  --shadow:  0 18px 50px rgba(0, 0, 0, 0.45);
  --maxread: 40rem;
  --serif:   "Noto Serif JP", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", "MS PMincho", serif;
  --sans:    "Noto Sans JP", system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  --fs: 1;
}

[data-theme="sepia"] {
  --bg:      #ece4d4;
  --bg-2:    #f3ecdd;
  --panel:   #fbf6ea;
  --panel-2: #f6efdf;
  --ink:     #2a2620;
  --ink-soft:#3c372e;
  --muted:   #6f6555;
  --faint:   #9a8f7c;
  --gold:    #9a7634;
  --comet:   #2f5d86;
  --line:    rgba(42, 38, 32, 0.16);
  --line-2:  rgba(42, 38, 32, 0.08);
  --shadow:  0 18px 50px rgba(120, 100, 60, 0.18);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 78% -8%, rgba(156, 196, 238, 0.10), transparent 60%),
    radial-gradient(900px 600px at 10% 8%, rgba(211, 182, 118, 0.07), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem clamp(1rem, 4vw, 2.4rem);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-2);
}
.topbar .brand {
  font-family: var(--serif);
  letter-spacing: 0.35em;
  font-size: 0.98rem;
  color: var(--ink-soft);
}
.topbar .brand b { color: var(--gold); font-weight: 600; }
.controls { display: flex; gap: 0.4rem; align-items: center; }
.btn {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.34rem 0.72rem;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.btn:hover { color: var(--ink); border-color: var(--gold); }
.btn[aria-pressed="true"] { color: var(--bg); background: var(--gold); border-color: var(--gold); }

/* ---------- hero (index) ---------- */
.hero {
  position: relative;
  text-align: center;
  padding: clamp(3.5rem, 11vw, 7rem) 1.4rem clamp(2.4rem, 6vw, 3.6rem);
  overflow: hidden;
}
.hero .comet { position: absolute; inset: 0; pointer-events: none; opacity: 0.9; }
.hero .kicker {
  font-family: var(--sans);
  letter-spacing: 0.5em;
  font-size: 0.74rem;
  color: var(--comet);
  text-transform: none;
  margin-bottom: 1.4rem;
}
.hero h1 {
  font-size: clamp(2.8rem, 9vw, 5.4rem);
  margin: 0 0 0.5rem;
  letter-spacing: 0.16em;
  font-weight: 600;
  color: var(--ink);
  text-shadow: 0 2px 30px rgba(156, 196, 238, 0.18);
}
.hero .sub {
  font-size: clamp(0.95rem, 2.6vw, 1.15rem);
  letter-spacing: 0.42em;
  color: var(--gold);
  margin: 0;
}
.hero .lead {
  max-width: 34rem;
  margin: 2rem auto 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 2.1;
}
.hero .lead .signoff { display:block; margin-top: 1rem; color: var(--muted); font-size: 0.9rem; letter-spacing: .1em;}

/* ---------- layout wrapper ---------- */
.wrap { max-width: 72rem; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem) 5rem; }

.section-label {
  display: flex; align-items: center; gap: 1rem;
  font-family: var(--sans);
  font-size: 0.76rem; letter-spacing: 0.4em; color: var(--muted);
  margin: 2.6rem 0 1.6rem;
}
.section-label::before, .section-label::after {
  content: ""; height: 1px; background: var(--line); flex: 1;
}

/* ---------- story grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17.5rem, 1fr));
  gap: 1.1rem;
}
.card {
  position: relative;
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem 1.5rem 1.3rem;
  min-height: 13.5rem;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; right: -30px; top: -30px;
  width: 90px; height: 90px; border-radius: 50%;
  background: radial-gradient(circle, rgba(156,196,238,0.18), transparent 70%);
}
.card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: var(--shadow); }
.card .no {
  font-family: var(--sans);
  font-size: 0.72rem; letter-spacing: 0.3em; color: var(--comet);
  margin-bottom: 0.6rem;
}
.card .ttl {
  font-size: 1.32rem; line-height: 1.5; margin: 0 0 0.5rem;
  color: var(--ink); letter-spacing: 0.04em;
}
.card .genre {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.68rem; letter-spacing: 0.12em;
  color: var(--gold);
  border: 1px solid var(--line);
  border-radius: 999px; padding: 0.18rem 0.6rem;
  margin-bottom: 0.8rem; align-self: flex-start;
}
.card .blurb { color: var(--muted); font-size: 0.92rem; line-height: 1.85; flex: 1; }
.card .meta {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-top: 1rem; padding-top: 0.8rem; border-top: 1px solid var(--line-2);
  font-family: var(--sans); font-size: 0.74rem; color: var(--faint);
}
.card .meta .author { color: var(--ink-soft); }

/* ---------- generic prose page (about / connections) ---------- */
.page {
  max-width: var(--maxread);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 4.5rem) clamp(1.2rem, 5vw, 2rem) 5rem;
}
.page h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  letter-spacing: 0.1em; margin: 0 0 0.4rem; font-weight: 600;
}
.page .eyebrow { font-family: var(--sans); letter-spacing: 0.4em; font-size: 0.74rem; color: var(--comet); margin-bottom: 1rem; }
.page p { font-size: calc(1.05rem * var(--fs)); line-height: 2.05; color: var(--ink-soft); margin: 0 0 1.4rem; }
.page h2 { font-size: 1.3rem; letter-spacing: 0.08em; margin: 2.6rem 0 1rem; color: var(--gold); }

/* motif table */
.motif-table { width: 100%; border-collapse: collapse; font-family: var(--sans); margin: 1rem 0 2rem; }
.motif-table th, .motif-table td { text-align: left; padding: 0.6rem 0.5rem; border-bottom: 1px solid var(--line-2); font-size: 0.86rem; vertical-align: top; }
.motif-table th { color: var(--muted); font-weight: 500; letter-spacing: 0.1em; }
.motif-table td .dot { color: var(--gold); }
.motif-name { color: var(--ink); }

/* ---------- story reading page ---------- */
.reader {
  max-width: var(--maxread);
  margin: 0 auto;
  padding: clamp(2.2rem, 6vw, 4rem) clamp(1.3rem, 6vw, 2rem) 3rem;
}
.reader .story-no { font-family: var(--sans); letter-spacing: 0.4em; font-size: 0.76rem; color: var(--comet); text-align: center; }
.reader .story-title { font-size: clamp(2rem, 6vw, 3rem); text-align: center; letter-spacing: 0.1em; margin: 0.7rem 0 0.6rem; font-weight: 600; line-height: 1.4; }
.reader .story-by { text-align: center; font-family: var(--sans); color: var(--muted); font-size: 0.86rem; letter-spacing: 0.16em; }
.reader .story-genre { text-align:center; font-family: var(--sans); color: var(--gold); font-size: 0.74rem; letter-spacing:.16em; margin-top:.5rem;}
.reader .rule { width: 64px; height: 2px; background: var(--gold); border: 0; margin: 2.2rem auto 2.6rem; opacity: .8;}

.prose { font-size: calc(1.14rem * var(--fs)); line-height: 2.15; letter-spacing: 0.015em; color: var(--ink); }
.prose p { margin: 0 0 1.55em; text-indent: 1em; }
.prose p.noindent, .prose p:first-of-type { text-indent: 0; }
.prose h2 {
  font-size: 1.25em; letter-spacing: 0.2em; text-align: center;
  color: var(--gold); font-weight: 500;
  margin: 3em 0 1.8em;
}
.prose .scene {
  text-align: center; margin: 2.4em 0; color: var(--faint);
  letter-spacing: 1em; font-size: 0.9em;
}
.prose .scene::before { content: "❋"; }

/* vertical writing mode */
.reader.tategaki .prose {
  writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  text-orientation: mixed;
  height: 76vh;
  overflow-x: auto; overflow-y: hidden;
  padding-bottom: 1rem;
  line-height: 2.0;
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}
.reader.tategaki .prose p { text-indent: 1em; margin: 0 0 0 1.55em; }
.reader.tategaki .prose h2 { margin: 0 1.8em; writing-mode: vertical-rl; }
.reader.tategaki .prose .scene { letter-spacing: 1em; margin: 0 2.4em; }

/* footer reveal */
.story-foot { max-width: var(--maxread); margin: 2rem auto 0; }
details.charm {
  border: 1px solid var(--line); border-radius: 12px; padding: 0.4rem 1.1rem;
  background: var(--panel); color: var(--muted); font-family: var(--sans); font-size: 0.86rem;
}
details.charm summary { cursor: pointer; letter-spacing: 0.12em; color: var(--gold); padding: 0.6rem 0; }
details.charm ul { margin: 0.4rem 0 0.8rem; padding-left: 1.2rem; line-height: 1.9; }

/* prev / next nav */
.pager {
  max-width: var(--maxread); margin: 2.5rem auto 0;
  display: flex; justify-content: space-between; gap: 1rem;
  font-family: var(--sans); font-size: 0.86rem;
}
.pager a, .pager span {
  flex: 1; padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: 12px;
  background: var(--panel); transition: all 0.18s ease;
}
.pager a:hover { border-color: var(--gold); color: var(--ink); }
.pager .next { text-align: right; }
.pager .label { display: block; color: var(--faint); font-size: 0.72rem; letter-spacing: 0.2em; margin-bottom: 0.3rem; }
.pager .t { color: var(--ink-soft); }
.pager .disabled { opacity: 0.35; }

.backhome { text-align: center; margin: 2.4rem auto 0; }
.backhome a { font-family: var(--sans); font-size: 0.84rem; letter-spacing: 0.2em; color: var(--muted); border-bottom: 1px solid var(--line); padding-bottom: 0.2rem; }
.backhome a:hover { color: var(--gold); border-color: var(--gold); }

/* site footer */
.site-foot {
  text-align: center; font-family: var(--sans); font-size: 0.76rem; letter-spacing: 0.18em;
  color: var(--faint); padding: 3rem 1rem 4rem; border-top: 1px solid var(--line-2); margin-top: 3rem;
}
.site-foot a { color: var(--muted); border-bottom: 1px solid var(--line); }
.site-foot a:hover { color: var(--gold); }
.disclaimer { max-width: 40rem; margin: 1.5rem auto 0; font-size: 0.72rem; letter-spacing: 0.03em; line-height: 1.95; color: var(--faint); opacity: 0.9; }

/* nav links row on index */
.index-nav { display:flex; gap:1.4rem; justify-content:center; flex-wrap:wrap; margin-top: 2rem; font-family:var(--sans); font-size:.84rem; letter-spacing:.16em;}
.index-nav a { color: var(--comet); border-bottom:1px solid transparent; padding-bottom:.2rem;}
.index-nav a:hover { border-color: var(--comet);}

@media (max-width: 560px) {
  .topbar .brand { letter-spacing: 0.2em; font-size: 0.82rem; }
  .btn { padding: 0.3rem 0.55rem; font-size: 0.72rem; }
  .prose { font-size: calc(1.08rem * var(--fs)); }
}

/* ---------- portal: two volumes ---------- */
.vol-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }
.vol-card {
  position: relative; display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line); border-radius: 18px;
  padding: 2rem 2rem 1.8rem; overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}
.vol-card::before {
  content: ""; position: absolute; right: -40px; top: -40px;
  width: 140px; height: 140px; border-radius: 50%;
  background: radial-gradient(circle, rgba(211,182,118,0.16), transparent 70%);
}
.vol-card:hover { transform: translateY(-5px); border-color: var(--gold); box-shadow: var(--shadow); }
.vol-label { font-family: var(--sans); letter-spacing: 0.4em; font-size: 0.74rem; color: var(--comet); }
.vol-title { font-size: clamp(1.7rem, 4vw, 2.3rem); letter-spacing: 0.08em; margin: 0.6rem 0 0.5rem; color: var(--ink); font-weight: 600; }
.vol-axis {
  display: inline-block; align-self: flex-start; font-family: var(--sans);
  font-size: 0.72rem; letter-spacing: 0.14em; color: var(--gold);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.22rem 0.7rem; margin-bottom: 0.9rem;
}
.vol-sub { color: var(--ink-soft); font-size: 0.96rem; line-height: 1.95; margin: 0 0 1.2rem; }
.vol-toc {
  list-style: none; margin: 0 0 1.4rem; padding: 1.1rem 0 0; border-top: 1px solid var(--line-2);
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.35rem 1.2rem;
  font-family: var(--sans); font-size: 0.82rem; color: var(--muted);
}
.vol-toc li { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.vol-toc .li-no { color: var(--comet); margin-right: 0.5em; font-size: 0.74rem; }
.vol-enter { font-family: var(--sans); font-size: 0.86rem; letter-spacing: 0.16em; color: var(--gold); margin-top: auto; }

.hero-vol h1 { font-size: clamp(2.2rem, 7vw, 3.6rem); }

/* POV tag on volume-2 story cards */
.card .pov {
  display: inline-block; font-family: var(--sans); font-size: 0.68rem; letter-spacing: 0.1em;
  color: var(--comet); border: 1px solid var(--line); border-radius: 999px;
  padding: 0.18rem 0.6rem; margin: 0 0 0.8rem 0.4rem; align-self: flex-start;
}

@media (max-width: 720px) {
  .vol-grid { grid-template-columns: 1fr; }
  .vol-toc { grid-template-columns: 1fr; }
}