.poem-body {
  background: #020202;
}

.poem-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 42%, rgba(184,155,94,.16), transparent 26%),
    radial-gradient(circle at 74% 24%, rgba(255,255,255,.08), transparent 9%),
    linear-gradient(180deg, #040404 0%, #080807 52%, #020202 100%);
}

.star-field {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.75) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(184,155,94,.55) 0 1px, transparent 1.8px);
  background-size: 140px 140px, 230px 230px;
  background-position: 0 0, 80px 60px;
  opacity: .25;
  animation: starDrift 38s linear infinite;
}

@keyframes starDrift {
  from { transform: translateY(0); }
  to { transform: translateY(160px); }
}

.poem-main-title {
  font-size: clamp(2.6rem, 7vw, 6.2rem);
  letter-spacing: .22em;
  line-height: 1.35;
  text-shadow: 0 20px 60px rgba(0,0,0,.95);
  margin: .4em 0 .24em;
}

.poem-meta,
.poem-lead {
  color: var(--muted);
  letter-spacing: .12em;
}

.poem-lead {
  margin-top: 1.8rem;
}

.reveal-on-load {
  opacity: 0;
  transform: translateY(28px);
  animation: loadReveal 1.35s ease forwards;
}
.delay-a { animation-delay: .15s; }
.delay-b { animation-delay: .3s; }
.delay-c { animation-delay: .45s; }
.delay-d { animation-delay: .6s; }

@keyframes loadReveal {
  to { opacity: 1; transform: translateY(0); }
}

.reader-controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 3rem;
}

.reader-btn {
  color: var(--text);
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 999px;
  padding: 11px 18px;
  letter-spacing: .1em;
  transition: background .35s ease, transform .35s ease, border-color .35s ease;
}

.reader-btn:hover,
.reader-btn.active {
  background: rgba(184,155,94,.22);
  border-color: rgba(184,155,94,.55);
  transform: translateY(-2px);
}

.scroll-down-link {
  display: inline-block;
  margin-top: 42px;
  color: rgba(255,255,255,.68);
  text-decoration: none;
  letter-spacing: .2em;
  font-size: .86rem;
}

.source-photo-section {
  padding: 110px 0;
  background: linear-gradient(180deg, #020202, #090908);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-title-small {
  font-size: clamp(1.9rem, 4vw, 3.3rem);
  letter-spacing: .12em;
  line-height: 1.45;
}

.book-photo-card {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  padding: 12px;
  box-shadow: 0 30px 90px rgba(0,0,0,.55);
}

.book-photo-card img,
.photo-interlude img {
  width: 100%;
  height: auto;
  display: block;
  filter: saturate(.86) contrast(.95) brightness(.86);
}

.poem-scroll-section {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(circle at 52% 20%, rgba(184,155,94,.1), transparent 20%),
    radial-gradient(circle at 20% 70%, rgba(255,255,255,.045), transparent 18%),
    linear-gradient(180deg, #020202 0%, #080806 42%, #010101 100%);
  overflow: clip;
}

.poem-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 99999;
  background: rgba(255,255,255,.06);
  opacity: 0;
  transition: opacity .35s ease;
}

.poem-scroll-section.is-active .poem-progress {
  opacity: 1;
}

.poem-scroll-hint {
  position: fixed;
  top: 50%;
  left: var(--poem-scroll-hint-left, 28px);
  z-index: 99997;
  display: flex;
  align-items: center;
  gap: .65em;
  color: var(--text);
  font-size: .82rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  text-shadow: 0 0 14px rgba(255,255,255,.16);
  opacity: 0;
  pointer-events: none;
  transform: translate(-8px, -50%);
  transition: opacity .5s ease, transform .5s ease;
}

.poem-scroll-hint span {
  font-size: 1.15em;
}

.poem-scroll-section.is-active .poem-scroll-hint {
  opacity: .28;
  transform: translate(0, -50%);
  animation: poem-scroll-hint-pulse 2s ease-in-out infinite;
}

@keyframes poem-scroll-hint-pulse {
  0%,
  100% {
    opacity: .28;
  }

  50% {
    opacity: .48;
  }
}

@media (prefers-reduced-motion: reduce) {
  .poem-scroll-section.is-active .poem-scroll-hint {
    opacity: .36;
    animation: none;
  }
}

@media (max-width: 767px) {
  .poem-scroll-hint {
    top: auto;
    right: auto;
    bottom: max(24px, env(safe-area-inset-bottom));
    left: 50%;
    transform: translate(-50%, 8px);
  }

  .poem-scroll-section.is-active .poem-scroll-hint {
    transform: translate(-50%, 0);
  }
}

.poem-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, transparent, var(--gold));
}

.poem-stage {
  width: min(100%, 1180px);
  margin: 0 auto;
  padding: 24vh 28px;
}

.poem-line {
  min-height: 58vh;
  display: grid;
  place-items: center;
  margin: 0;
  opacity: .08;
  transform: translateY(54px) scale(.985);
  transition: opacity 1.45s ease, transform 1.45s ease, filter 1.45s ease;
  filter: blur(5px);
}

.poem-line span {
  display: inline-block;
  color: rgba(241,238,231,.95);
  font-size: clamp(1.45rem, 3.4vw, 3.1rem);
  line-height: 2.25;
  letter-spacing: .18em;
  text-shadow: 0 0 34px rgba(184,155,94,.12);
}

.poem-line.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

.poem-title-card span {
  color: var(--gold);
  font-size: clamp(2rem, 5vw, 4rem);
}

.vertical-mode .poem-stage {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  min-height: 100vh;
}

.vertical-mode .poem-line {
  min-width: 42vw;
  min-height: 84vh;
  padding: 0 5vw;
}

.vertical-mode .photo-interlude {
  writing-mode: horizontal-tb;
  min-width: 62vw;
}

.horizontal-mode .poem-stage {
  writing-mode: horizontal-tb;
}

.horizontal-mode .poem-line {
  min-height: 58vh;
}

.cosmic-break span {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(255,255,255,.82);
  box-shadow:
    0 0 26px rgba(255,255,255,.55),
    0 0 70px rgba(184,155,94,.38);
}

.photo-interlude figure {
  width: min(720px, 86vw);
  margin: 0;
  border: 1px solid rgba(255,255,255,.13);
  background: rgba(255,255,255,.045);
  padding: 12px;
  box-shadow: 0 30px 90px rgba(0,0,0,.6);
}

.photo-interlude figcaption {
  color: rgba(255,255,255,.55);
  font-size: .78rem;
  letter-spacing: .16em;
  margin-top: 12px;
  text-align: center;
}

.final-line span {
  color: #fff9ed;
  text-shadow: 0 0 42px rgba(184,155,94,.28);
}

.poem-after {
  position: relative;
}

@media (max-width: 991px) {
  .vertical-mode .poem-stage {
    writing-mode: horizontal-tb;
  }
  .vertical-mode .poem-line {
    min-width: auto;
    min-height: 55vh;
    padding: 0;
  }
  .poem-line span {
    font-size: clamp(1.25rem, 6vw, 2.1rem);
    letter-spacing: .08em;
    line-height: 2.05;
    text-align: center;
  }
  .reader-controls {
    gap: 9px;
  }
  .reader-btn {
    padding: 10px 14px;
    font-size: .86rem;
  }
}


/* ===== Vertical paged poem reader / 2026-07 revision ===== */
.poem-body {
  background: #020202;
}

.reader-controls {
  display: none !important;
}

.poem-scroll-section.vertical-only {
  position: relative;
  background:
    radial-gradient(circle at 52% 20%, rgba(184,155,94,.09), transparent 20%),
    radial-gradient(circle at 20% 70%, rgba(255,255,255,.04), transparent 18%),
    linear-gradient(180deg, #020202 0%, #080806 42%, #010101 100%);
  overflow: visible;
}

.poem-page {
  position: relative;
  min-height: 150vh;
  padding: 0 24px;
}

.poem-page-inner {
  position: sticky;
  top: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  opacity: 1;
  transition: opacity 1.15s ease, filter 1.15s ease, transform 1.15s ease;
}

.poem-page.is-fading .poem-page-inner {
  opacity: 0;
  filter: blur(8px);
  transform: translateY(-18px) scale(.985);
}

.poem-page-lines {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  display: flex;
  flex-direction: row-reverse;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(1.6rem, 4vw, 4.2rem);
  max-width: min(92vw, 1120px);
  height: min(74vh, 760px);
  margin: 0 auto;
}

.poem-page-line {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  margin: 0;
  opacity: 0;
  transform: translateY(34px);
  filter: blur(8px);
  transition: opacity 1.15s ease, transform 1.15s ease, filter 1.15s ease;
}

.poem-page-line.is-visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.poem-page-line span {
  display: inline-block;
  color: rgba(241,238,231,.96);
  font-size: clamp(1.45rem, 2.5vw, 2.65rem);
  line-height: 1.9;
  letter-spacing: .18em;
  text-shadow: 0 0 34px rgba(184,155,94,.14);
}

.poem-title-page .poem-page-inner {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.poem-page-label {
  color: var(--gold);
  letter-spacing: .22em;
  font-size: .95rem;
  margin: 0 0 0 2.2rem;
}

.poem-page-title {
  color: var(--text);
  font-size: clamp(2.3rem, 5vw, 5.4rem);
  line-height: 1.6;
  letter-spacing: .22em;
  margin: 0;
  text-shadow: 0 20px 70px rgba(0,0,0,.96);
}

.final-page .poem-page-line span {
  color: #fff9ed;
  text-shadow: 0 0 42px rgba(184,155,94,.32);
}

@media (max-width: 767px) {
  .poem-page {
    min-height: 155vh;
    padding: 0 14px;
  }

  .poem-page-lines {
    gap: clamp(1rem, 5vw, 2.2rem);
    max-width: 96vw;
    height: 72vh;
  }

  .poem-page-line span {
    font-size: clamp(1.15rem, 5.2vw, 1.9rem);
    line-height: 1.8;
    letter-spacing: .12em;
  }

  .poem-page-title {
    font-size: clamp(2rem, 10vw, 3.6rem);
  }
}

/* ===== Final override: vertical paged reader, right-to-left column accumulation ===== */
.poem-scroll-section.vertical-only {
  overflow: visible;
}

.poem-page {
  min-height: 210vh;
}

.poem-page-inner {
  position: sticky;
  top: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 1.25s ease, filter 1.25s ease, transform 1.25s ease;
}

.poem-page.is-fading .poem-page-inner {
  opacity: 0;
  filter: blur(8px);
  transform: translateY(-18px) scale(.985);
}

.poem-page-lines {
  writing-mode: horizontal-tb !important;
  text-orientation: mixed;
  display: flex !important;
  flex-direction: row-reverse !important;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(1.7rem, 4vw, 4.6rem);
  width: min(94vw, 1160px);
  height: min(76vh, 780px);
  margin: 0 auto;
}

.poem-page-line {
  writing-mode: vertical-rl !important;
  text-orientation: mixed;
  display: block;
  margin: 0;
  opacity: 0;
  transform: translateY(38px) scale(.985);
  filter: blur(9px);
  transition: opacity 1.1s ease, transform 1.1s ease, filter 1.1s ease;
}

.poem-page-line.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

.poem-page-line span {
  writing-mode: vertical-rl !important;
  text-orientation: mixed;
  display: block;
  color: rgba(241,238,231,.96);
  font-size: clamp(1.42rem, 2.35vw, 2.55rem);
  line-height: 1.9;
  letter-spacing: .18em;
  white-space: nowrap;
  text-shadow: 0 0 34px rgba(184,155,94,.14);
}

.poem-title-page .poem-page-inner {
  writing-mode: vertical-rl !important;
  text-orientation: mixed;
}

@media (max-width: 767px) {
  .poem-page {
    min-height: 210vh;
    padding: 0 10px;
  }

  .poem-page-lines {
    gap: clamp(.85rem, 4.6vw, 2rem);
    width: 98vw;
    height: 74vh;
  }

  .poem-page-line span {
    font-size: clamp(1.08rem, 4.7vw, 1.65rem);
    line-height: 1.75;
    letter-spacing: .11em;
  }
}


/* ===== Fine tune: slower vertical column reveal and centered title page ===== */
.poem-page {
  --poem-sticky-height: 100vh;
  min-height: calc(var(--poem-sticky-height) + var(--poem-scroll-distance, 1980px));
  margin-bottom: calc(-1 * var(--poem-sticky-height));
}

.poem-page.final-page {
  margin-bottom: 0;
}

.poem-page .poem-page-inner {
  transition: none;
}

.poem-title-page .poem-page-inner {
  writing-mode: horizontal-tb !important;
  text-orientation: mixed;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.poem-title-page .poem-page-label {
  margin: 0 0 1.4rem;
}

.poem-title-page .poem-page-title {
  text-align: center;
  margin: 0 auto;
}

/* 高さが限られるパソコン画面では、最長の縦書き行も画面内に収める */
@media (min-width: 768px) and (max-height: 1100px) {
  .poem-page {
    --poem-sticky-height: calc(100vh - 64px);
  }

  .poem-page-inner {
    top: 64px;
    min-height: calc(100vh - 64px);
  }

  .poem-page-lines {
    height: min(88vh, 920px);
  }

  .poem-page-line span {
    font-size: clamp(1.38rem, 2.76vh, 1.86rem);
  }
}