/* ═══════════════════════════════════════════════
   流星雨ペトリコール — Special Site Stylesheet
   ═══════════════════════════════════════════════ */

/* ─── CSS VARIABLES ─── */
:root {
  --void:        #050709;
  --deep:        #060e10;
  --night:       #0a1618;
  --dusk:        #0f2028;
  --mist:        #6b9aa8;
  --silver:      #b8d4da;
  --frost:       #e4f0f2;
  --teal:        #3ecfb0;
  --teal-pale:   #a8ede0;
  --star:        #e8f5f5;
  --teal-deep:   #0a2830;
  --teal-mid:    #164a50;
  --teal-soft:   #3a9aaa;
  --blue-violet: #8a9fd4;
}

/* ─── RESET ─── */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--void);
  color: var(--frost);
  font-family: 'Noto Serif JP', serif;
  font-weight: 300;
  overflow-x: hidden;
  cursor: none;
}

/* ─── CUSTOM CURSOR ─── */
.cursor {
  position: fixed;
  width: 6px;
  height: 6px;
  background: var(--teal-pale);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  mix-blend-mode: screen;
}

.cursor-ring {
  position: fixed;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(62, 207, 176, 0.4);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s, border-color 0.4s;
}

/* ─── STAR CANVAS ─── */
#star-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(to bottom, rgba(5, 7, 9, 0.9) 0%, transparent 100%);
}

.nav-logo a {
  display: block;
  line-height: 0;
}

.nav-logo-img {
  height: 28px;
  width: auto;
  display: block;
  opacity: 0.85;
  transition: opacity 0.3s;
}

.nav-logo-img:hover {
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.3s;
}

.nav-links a:hover { color: var(--teal-pale); }

/* ─── HERO ─── */
#hero {
  position: relative;
  min-height: 100vh;
  height: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1;
  overflow: visible;
  padding: 100px 0 80px;
  box-sizing: border-box;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 70% at 50% 30%, rgba(10, 40, 50, 0.8) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 20% 80%, rgba(15, 35, 45, 0.5) 0%, transparent 60%),
    radial-gradient(ellipse 30% 40% at 80% 70%, rgba(20, 80, 90, 0.25) 0%, transparent 60%);
}

.hero-ornament-top {
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  letter-spacing: 0.5em;
  color: var(--teal);
  font-family: 'IM Fell English', serif;
  font-style: italic;
  opacity: 0;
  animation: fadeUp 1s ease 0.5s forwards;
}

.hero-center {
  text-align: center;
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 0 24px;
}

.hero-subtitle { display: none; }

.hero-title {
  margin: 0;
  line-height: 1;
}

.hero-logo {
  display: block;
  width: clamp(280px, 50vw, 560px);
  height: auto;
  margin: 0 auto;
  mix-blend-mode: normal;
  filter: none;
  opacity: 0;
  animation: fadeUp 1.2s ease 0.8s forwards;
}

.hero-divider {
  width: 120px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal), transparent);
  margin: 40px auto;
  opacity: 0;
  animation: fadeIn 1s ease 1.5s forwards;
}

.hero-quote {
  opacity: 0;
  animation: fadeUp 1s ease 1.7s forwards;
}

.hero-quote-large {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: clamp(24px, 3.5vw, 38px);
  letter-spacing: 0.2em;
  line-height: 1.9;
  color: var(--frost);
  margin-bottom: 40px;
}

.hero-quote-large em {
  font-style: normal;
  color: var(--blue-violet);
}

.hero-quote-sub-text {
  display: block;
  font-size: 0.55em;
  letter-spacing: 0.18em;
  line-height: 2.2;
  color: var(--mist);
  font-weight: 300;
}

.hero-quote-sub {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--teal);
  margin-top: 16px;
  opacity: 0.7;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeIn 1s ease 2.5s forwards;
}

.hero-scroll span {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 9px;
  letter-spacing: 0.4em;
  color: var(--mist);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--teal), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ─── SECTION BASE ─── */
section {
  position: relative;
  z-index: 1;
  padding: 120px 0;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 48px;
}

.section-label {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.5em;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.section-label::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--teal);
  flex-shrink: 0;
}

.section-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.2em;
  line-height: 1.4;
  color: var(--frost);
  margin-bottom: 48px;
}

/* ─── WORLD ─── */
#world {
  background: linear-gradient(to bottom, transparent, rgba(10, 12, 20, 0.8), transparent);
}

.world-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  text-align: left;
}

.world-text { text-align: left; }

.world-text p {
  font-size: 14px;
  line-height: 2.6;
  color: var(--silver);
  letter-spacing: 0.08em;
  margin-bottom: 24px;
}

.world-text p strong { color: var(--blue-violet); font-weight: 400; }

.world-visual { position: relative; padding-top: 24px; }

.world-card {
  background: linear-gradient(135deg, rgba(8, 38, 44, 0.6) 0%, rgba(16, 18, 30, 0.8) 100%);
  border: 1px solid rgba(62, 207, 176, 0.2);
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.world-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal), transparent);
}

.world-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal), transparent);
}

.world-card + .world-card { margin-top: 20px; }

.world-card-label {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--teal);
  margin-bottom: 16px;
}

.world-card-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: 22px;
  letter-spacing: 0.3em;
  color: var(--frost);
  margin-bottom: 20px;
}

.world-card-title em {
  font-style: normal;
  color: var(--blue-violet);
  font-size: 0.7em;
  display: block;
  margin-top: 8px;
  letter-spacing: 0.2em;
}

.world-card p {
  font-size: 13px;
  line-height: 2.4;
  color: var(--mist);
  letter-spacing: 0.05em;
}

/* ─── KEYWORD TAGS ─── */
.keyword-tag {
  display: inline-block;
  border: 1px solid rgba(138, 159, 212, 0.3);
  padding: 4px 16px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--blue-violet);
  margin: 4px;
  transition: all 0.3s;
}

.keyword-tag:hover {
  background: rgba(138, 159, 212, 0.1);
  border-color: var(--blue-violet);
}

/* ─── CHARACTER CARDS ─── */
#character {
  background: linear-gradient(to bottom, transparent, rgba(20, 80, 90, 0.08), transparent);
}

.char-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}

.char-card {
  background: linear-gradient(160deg, rgba(8, 38, 44, 0.5), rgba(6, 14, 18, 0.7));
  border: 1px solid rgba(62, 207, 176, 0.15);
  padding: 32px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s;
}

.char-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal), transparent);
  opacity: 0.5;
}

.char-card:hover { border-color: rgba(62, 207, 176, 0.35); }

.char-card-role {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 9px;
  letter-spacing: 0.4em;
  color: var(--teal);
  opacity: 0.7;
  margin-bottom: 20px;
}

.char-card-silhouette {
  width: 64px;
  height: 64px;
  border: 1px solid rgba(62, 207, 176, 0.2);
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: rgba(8, 38, 44, 0.6);
}

.char-card-silhouette .char-glow {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(62, 207, 176, 0.08) 0%, transparent 70%);
}

.char-card-name {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: 15px;
  letter-spacing: 0.2em;
  color: var(--frost);
  margin-bottom: 6px;
  line-height: 1.6;
}

.char-card-name-en {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--teal);
  opacity: 0.7;
  margin-bottom: 20px;
}

.char-card-body {
  font-size: 12px;
  line-height: 2.3;
  color: var(--mist);
  letter-spacing: 0.07em;
  border-top: 1px solid rgba(62, 207, 176, 0.1);
  padding-top: 16px;
}

/* ─── STORY ─── */
#story { }

.story-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: center;
}

.story-synopsis {
  max-width: 640px;
}

.story-synopsis p {
  font-size: 14px;
  line-height: 2.8;
  color: var(--silver);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  text-align: left;
}

.story-synopsis strong {
  color: var(--blue-violet);
  font-weight: 400;
}

.story-illust {
  position: relative;
}

.story-illust img {
  width: 100%;
  height: auto;
  display: block;
  /* 黒背景を透過させてサイトに溶け込ませる */
  mix-blend-mode: lighten;
  filter: drop-shadow(0 0 40px rgba(62, 207, 176, 0.12));
}

.story-quote {
  position: relative;
  max-width: 680px;
  margin: 0 auto 80px;
}

.story-quote-large {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: clamp(24px, 3.5vw, 38px);
  letter-spacing: 0.2em;
  line-height: 1.9;
  color: var(--frost);
  margin-bottom: 40px;
}

.story-quote-large em { font-style: normal; color: var(--blue-violet); }

.story-ornament {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--teal);
}

.story-body {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
}

.story-body p {
  font-size: 14px;
  line-height: 2.8;
  color: var(--silver);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

/* ─── GLOSSARY ─── */
#glossary {
  background: linear-gradient(to bottom, transparent, rgba(16, 12, 28, 0.6), transparent);
}

.glossary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.glossary-item {
  background: linear-gradient(135deg, rgba(6, 30, 38, 0.5), rgba(10, 12, 20, 0.7));
  border: 1px solid rgba(62, 207, 176, 0.12);
  border-left: 2px solid rgba(62, 207, 176, 0.35);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s, background 0.4s;
  cursor: default;
}

.glossary-item:hover {
  border-color: rgba(138, 159, 212, 0.4);
  border-left-color: var(--blue-violet);
  background: linear-gradient(135deg, rgba(8, 38, 44, 0.5), rgba(16, 18, 30, 0.8));
}

.glossary-item::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60px; height: 60px;
  background: radial-gradient(circle at top right, rgba(62, 207, 176, 0.07), transparent 70%);
  pointer-events: none;
}

.glossary-item.wide { grid-column: span 2; }

.glossary-item.danger {
  border-left-color: rgba(180, 100, 120, 0.5);
  background: linear-gradient(135deg, rgba(8, 30, 32, 0.5), rgba(10, 12, 20, 0.7));
}

.glossary-item.danger:hover {
  border-left-color: rgba(220, 140, 160, 0.6);
  background: linear-gradient(135deg, rgba(10, 36, 38, 0.5), rgba(16, 10, 18, 0.8));
}

.glossary-id {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 9px;
  letter-spacing: 0.5em;
  color: var(--teal);
  margin-bottom: 10px;
  opacity: 0.7;
}

.glossary-item.danger .glossary-id { color: #c47a8a; }

.glossary-name-jp {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: 20px;
  letter-spacing: 0.25em;
  color: var(--frost);
  margin-bottom: 4px;
  line-height: 1.4;
}

.glossary-name-en {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--teal);
  margin-bottom: 18px;
}

.glossary-item.danger .glossary-name-en { color: #c47a8a; }

.glossary-body {
  font-size: 12.5px;
  line-height: 2.4;
  color: var(--mist);
  letter-spacing: 0.07em;
}

.glossary-body strong { color: var(--blue-violet); font-weight: 400; }

.glossary-item.danger .glossary-body strong { color: #d4a0ae; }

.glossary-tag {
  display: inline-block;
  border: 1px solid rgba(62, 207, 176, 0.25);
  padding: 2px 10px;
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--teal);
  margin-top: 14px;
}

.glossary-item.danger .glossary-tag {
  border-color: rgba(180, 100, 120, 0.3);
  color: #c47a8a;
}

/* ─── RELEASE ─── */
#release {
  background: linear-gradient(to bottom, transparent, rgba(10, 12, 20, 0.6));
}

.release-card {
  max-width: 600px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(8, 38, 44, 0.4), rgba(16, 18, 30, 0.6));
  border: 1px solid rgba(62, 207, 176, 0.25);
  padding: 60px;
  text-align: center;
  position: relative;
}

.release-card::before,
.release-card::after {
  content: '✦';
  position: absolute;
  font-size: 10px;
  color: var(--teal);
}

.release-card::before { top: 16px; left: 50%; transform: translateX(-50%); }
.release-card::after  { bottom: 16px; left: 50%; transform: translateX(-50%); }

.release-circle {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--teal);
  margin-bottom: 8px;
}

.release-circle-name {
  font-family: 'Cormorant Garamond', serif;
  font-size: 32px;
  letter-spacing: 0.2em;
  color: var(--frost);
  margin-bottom: 48px;
}

.release-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
  text-align: left;
}

.release-info-item {
  border-left: 1px solid rgba(62, 207, 176, 0.3);
  padding-left: 20px;
}

.release-info-label {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--teal);
  margin-bottom: 8px;
}

.release-info-value {
  font-size: 14px;
  letter-spacing: 0.15em;
  color: var(--frost);
  line-height: 1.7;
}

.release-date-large {
  font-family: 'Cormorant Garamond', serif;
  font-size: 44px;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 8px;
  text-shadow: 0 0 40px rgba(62, 207, 176, 0.4);
}

.release-event {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--mist);
}

/* ─── BOOK LAYOUT ─── */
.book-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
  max-width: 860px;
  margin: 0 auto;
}

/* 書影 */
.book-cover-inner {
  border: 1px solid rgba(62, 207, 176, 0.25);
  overflow: hidden;
  position: relative;
  aspect-ratio: 2/3;
  background: linear-gradient(160deg, rgba(8, 38, 44, 0.6), rgba(6, 14, 18, 0.9));
}

.book-cover-inner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal), transparent);
}

.book-cover-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

.book-cover-placeholder-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: 22px;
  letter-spacing: 0.3em;
  line-height: 2;
  color: rgba(62, 207, 176, 0.3);
  text-align: center;
}

/* 書籍情報 */
.book-cover-credit {
  margin-top: 12px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.book-cover-credit-label {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--mist);
}

.book-cover-credit-link {
  font-family: 'Noto Serif JP', serif;
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(62, 207, 176, 0.3);
  padding-bottom: 1px;
  transition: color 0.3s, border-color 0.3s;
}

.book-cover-credit-link:hover {
  color: var(--teal-pale);
  border-color: var(--teal);
}


  padding-top: 8px;
}

.book-title-block {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(62, 207, 176, 0.15);
}

.book-info-label {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--teal);
  margin-bottom: 10px;
}

.book-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: 28px;
  letter-spacing: 0.25em;
  color: var(--frost);
  margin-bottom: 6px;
  line-height: 1.4;
}

.book-title-en {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--teal);
  opacity: 0.7;
  margin-top: 8px;
  margin-bottom: 28px;
  display: block;
}

.book-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 40px;
}

.book-meta-item {
  border-left: 1px solid rgba(62, 207, 176, 0.25);
  padding-left: 16px;
}

.book-meta-value {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--frost);
  line-height: 1.8;
}

.book-meta-value span {
  font-size: 11px;
  color: var(--mist);
  letter-spacing: 0.15em;
}

/* ─── TRIAL READING VIEWER ─── */
#trial {
  background: linear-gradient(to bottom, transparent, rgba(6, 20, 24, 0.5), transparent);
}

.viewer {
  max-width: 680px;
  margin: 0 auto;
}

.viewer-stage {
  position: relative;
  background: #080e10;
  border: 1px solid rgba(62, 207, 176, 0.2);
  overflow: hidden;
}

.viewer-stage::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal), transparent);
  z-index: 2;
}

.viewer-page-wrap {
  width: 100%;
  aspect-ratio: 2/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.viewer-page-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: opacity 0.3s ease;
}

.viewer-page-wrap img.fade {
  opacity: 0;
}

.viewer-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 80px;
  background: rgba(6, 20, 24, 0.7);
  border: none;
  color: var(--teal);
  font-size: 28px;
  cursor: pointer;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s, color 0.3s;
  opacity: 0.6;
}

.viewer-btn:hover {
  background: rgba(62, 207, 176, 0.15);
  opacity: 1;
}

.viewer-btn-prev { left: 0; }
.viewer-btn-next { right: 0; }

.viewer-btn:disabled {
  opacity: 0.15;
  cursor: default;
}

/* コントロール */
.viewer-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 20px 0 16px;
  border-bottom: 1px solid rgba(62, 207, 176, 0.1);
}

.viewer-ctrl-btn {
  background: none;
  border: 1px solid rgba(62, 207, 176, 0.3);
  color: var(--teal);
  width: 32px;
  height: 32px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-ctrl-btn:hover {
  background: rgba(62, 207, 176, 0.1);
  border-color: var(--teal);
}

.viewer-ctrl-btn:disabled {
  opacity: 0.2;
  cursor: default;
}

.viewer-counter {
  font-family: 'Cormorant Garamond', serif;
  font-size: 18px;
  letter-spacing: 0.2em;
  color: var(--frost);
  min-width: 80px;
  text-align: center;
}

.viewer-sep {
  color: var(--mist);
  margin: 0 4px;
}

.viewer-total {
  color: var(--mist);
  font-size: 0.85em;
}

/* サムネイル */
.viewer-thumbs {
  display: flex;
  gap: 8px;
  padding: 16px 0 0;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(62, 207, 176, 0.3) transparent;
}

.viewer-thumbs::-webkit-scrollbar {
  height: 3px;
}

.viewer-thumbs::-webkit-scrollbar-track { background: transparent; }
.viewer-thumbs::-webkit-scrollbar-thumb {
  background: rgba(62, 207, 176, 0.3);
  border-radius: 2px;
}

.viewer-thumb {
  flex-shrink: 0;
  width: 52px;
  aspect-ratio: 2/3;
  border: 1px solid rgba(62, 207, 176, 0.15);
  overflow: hidden;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.3s, border-color 0.3s;
  background: #080e10;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Cormorant Garamond', serif;
  font-size: 10px;
  color: var(--mist);
  letter-spacing: 0.1em;
}

.viewer-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.viewer-thumb:hover,
.viewer-thumb.active {
  opacity: 1;
  border-color: var(--teal);
}

/* 読む方法 2ボックス */
.book-read-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 36px;
}

.book-read-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  border: 1px solid rgba(62, 207, 176, 0.25);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
  background: rgba(8, 38, 44, 0.3);
  text-align: center;
}

.book-read-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(62, 207, 176, 0.05);
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.book-read-box:hover::before { transform: translateY(0); }

.book-read-box:hover {
  border-color: var(--teal);
  box-shadow: 0 0 24px rgba(62, 207, 176, 0.12);
}

.book-read-box--external {
  border-color: rgba(138, 159, 212, 0.25);
  background: rgba(10, 16, 38, 0.3);
}

.book-read-box--external::before {
  background: rgba(138, 159, 212, 0.05);
}

.book-read-box--external:hover {
  border-color: var(--blue-violet);
  box-shadow: 0 0 24px rgba(138, 159, 212, 0.12);
}

.book-read-box-icon {
  font-size: 16px;
  color: var(--teal);
  margin-bottom: 4px;
}

.book-read-box--external .book-read-box-icon { color: var(--blue-violet); }

.book-read-box-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 300;
  font-size: 15px;
  letter-spacing: 0.3em;
  color: var(--frost);
}

.book-read-box-desc {
  font-size: 11px;
  letter-spacing: 0.15em;
  line-height: 1.9;
  color: var(--mist);
}

.book-read-box-cta {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--teal);
  margin-top: 4px;
}

.book-read-box--external .book-read-box-cta { color: var(--blue-violet); }


/* ─── CIRCLE ─── */
#circle {
  background: linear-gradient(to bottom, transparent, rgba(6, 20, 24, 0.4), transparent);
}

.circle-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: center;
}

.circle-logo-block {
  text-align: center;
}

.circle-logo {
  width: 180px;
  height: auto;
  display: block;
  margin: 0 auto 20px;
  opacity: 0.9;
}

.circle-catchcopy {
  font-family: 'Noto Serif JP', serif;
  font-weight: 200;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  line-height: 1.9;
}

.circle-desc {
  font-size: 13.5px;
  line-height: 2.6;
  color: var(--silver);
  letter-spacing: 0.08em;
  margin-bottom: 32px;
}

.circle-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.circle-link-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 28px;
  border: 1px solid rgba(62, 207, 176, 0.4);
  color: var(--teal);
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.2em;
  transition: background 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.circle-link-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(62, 207, 176, 0.06);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.circle-link-btn:hover::before { transform: translateX(0); }
.circle-link-btn:hover { border-color: var(--teal); }

.circle-link-btn--x {
  border-color: rgba(138, 159, 212, 0.4);
  color: var(--blue-violet);
}

.circle-link-btn--x::before { background: rgba(138, 159, 212, 0.06); }
.circle-link-btn--x:hover { border-color: var(--blue-violet); }

/* ─── FOOTER ─── */
footer {
  position: relative;
  z-index: 1;
  padding: 60px 48px;
  text-align: center;
  border-top: 1px solid rgba(62, 207, 176, 0.1);
}

.footer-logo {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--teal);
  margin-bottom: 16px;
}

.footer-copy {
  font-family: 'IM Fell English', serif;
  font-style: italic;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: rgba(123, 127, 168, 0.5);
}

/* ─── DECORATIVE STARS ─── */
.deco-star {
  position: absolute;
  color: var(--teal);
  font-size: 12px;
  opacity: 0.4;
  animation: twinkle 3s ease-in-out infinite;
}

/* ─── ORNAMENT DIVIDER ─── */
.ornament-divider {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 80px 0;
  opacity: 0.4;
}

.ornament-divider::before,
.ornament-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--teal));
}

.ornament-divider::after {
  background: linear-gradient(to left, transparent, var(--teal));
}

.ornament-divider span {
  font-size: 14px;
  color: var(--teal);
  letter-spacing: 0.3em;
}

/* ─── SCROLL REVEAL ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── ANIMATIONS ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scrollPulse {
  0%,  100% { opacity: 0.3; transform: scaleY(1); }
  50%        { opacity: 1;   transform: scaleY(1.2); transform-origin: top; }
}

@keyframes twinkle {
  0%,  100% { opacity: 0.2; transform: scale(1); }
  50%        { opacity: 0.7; transform: scale(1.3); }
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  nav                  { padding: 20px 24px; }
  .nav-links           { display: none; }
  .container           { padding: 0 24px; }
  section              { padding: 80px 0; }
  .world-grid          { grid-template-columns: 1fr; gap: 40px; }
  .story-layout        { grid-template-columns: 1fr; gap: 40px; }
  .story-illust        { max-width: 280px; margin: 0 auto; }
  .circle-layout       { grid-template-columns: 1fr; gap: 40px; }
  .circle-logo-block   { max-width: 240px; margin: 0 auto; }
  .char-layout         { grid-template-columns: 1fr; gap: 40px; }
  .char-silhouette     { aspect-ratio: 2/1; }
  .char-cards          { grid-template-columns: 1fr; }
  .release-card        { padding: 40px 24px; }
  .release-info-grid   { grid-template-columns: 1fr; }
  .glossary-grid       { grid-template-columns: 1fr; }
  .glossary-item.wide  { grid-column: span 1; }
  .book-layout         { grid-template-columns: 1fr; gap: 40px; }
  .book-cover-inner    { aspect-ratio: 2/3; max-width: 240px; margin: 0 auto; }
  .book-meta-grid      { grid-template-columns: 1fr; gap: 20px; }
  .book-read-options   { grid-template-columns: 1fr; }
}