/**
 * gallery.css
 * Chura Geographic — Gallery (Ocean Memory) page styles
 * Inspired by Gregory Colbert's Ashes and Snow: full-width photographs,
 * extreme whitespace, minimal text, dark immersive background.
 */

/* ─── Page reset for gallery ──────────────────────────────── */
body.page-gallery {
  background: #000;
  overflow-x: hidden;
}



/* ─── Footer overrides for gallery ────────────────────────── */
/* フッターの© テキストを lowercase に修正（styles.cssがuppercase強制） */
body.page-gallery .site-footer p {
  text-transform: none;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(222, 216, 204, 0.35);
}

body.page-gallery .site-footer {
  padding-left: 2rem;
  padding-right: 2rem;
}

@media (max-width: 500px) {
  body.page-gallery .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1.5rem 1rem;
  }
}

/* ─── Opening section (title only, full screen) ───────────── */
.gallery-opening {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100svh;
  text-align: center;
  background: transparent;
  padding: 0 2rem;
}

.gallery-opening .opening-text {
  opacity: 0;
  animation: fadeInSlideUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.opening-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent, #b8d4db);
  margin-top: 0;
  margin-bottom: 1.5rem;
  opacity: 0.8;
}

.opening-title {
  font-family: var(--font-en-display);
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.05;
  color: var(--text);
  margin: 0 0 2rem;
}

:lang(ja) .opening-title {
  font-family: var(--font-ja-display);
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  letter-spacing: 0.1em;
}

.opening-subtitle {
  font-family: var(--font-serif);
  font-size: clamp(0.95rem, 1.8vw, 1.25rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--text);
  margin: 0;
  line-height: 2.1;
}

:lang(ja) .opening-subtitle {
  font-family: var(--font-ja-display);
  line-height: 2.3;
  letter-spacing: 0.08em;
}

/* scroll hint — horizontal indicator */
.opening-scroll-hint {
  position: absolute;
  bottom: 8rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  pointer-events: none;
}

.opening-scroll-hint .hint-text {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  white-space: nowrap;
  opacity: 0.8;
}

.opening-scroll-hint .hint-arrow {
  width: 40px;
  height: 1px;
  background: linear-gradient(to right, rgba(222,216,204,0.1) 0%, rgba(222,216,204,0.8) 100%);
  position: relative;
  animation: scroll-hint-arrow-pulse 2s ease-in-out infinite;
}

/* 矢印の先端（アローヘッド）を除去し、シンプルな横線（ー）にする */
/* .opening-scroll-hint .hint-arrow::after {
  content: '';
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-top: 1px solid rgba(222,216,204,0.8);
  border-right: 1px solid rgba(222,216,204,0.8);
  transform: rotate(45deg);
} */

@keyframes scroll-hint-arrow-pulse {
  0% {
    transform: translateX(-10px);
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateX(10px);
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .opening-scroll-hint .hint-arrow { animation: none; opacity: 0.6; }
}

@media (max-width: 768px) {
  .opening-scroll-hint {
    bottom: calc(8.5rem + env(safe-area-inset-bottom));
  }
}

/* ─── Gallery main wrapper & Horizontal Scroll ───────────────── */
.gallery-main {
  background: #000;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
  height: 100svh;
}

.gallery-scroll-container {
  display: flex;
  flex-direction: row;
  overflow-x: auto;
  overflow-y: hidden;
  width: 100vw;
  height: 100vh;
  height: 100svh;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none; /* Firefox */
  background: #000;
  -webkit-overflow-scrolling: touch;
}

.gallery-scroll-container::-webkit-scrollbar {
  display: none; /* Chrome, Safari */
}

/* ─── Horizontal slide elements ───────────────────────────── */
.gallery-opening,
.gallery-frame {
  flex: 0 0 100vw;
  width: 100vw;
  height: 100vh;
  height: 100svh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  box-sizing: border-box;
}

/* ─── Full-width photograph frame ─────────────────────────── */
.gallery-frame {
  margin: 0;
  padding: 6vh 4vw 4vh;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #000;
}

.gallery-frame__link {
  display: block;
  /* subtle hover dim */
  transition: opacity 0.4s ease;
  max-width: 100%;
}

.gallery-frame__link:hover {
  opacity: 0.92;
}

.gallery-frame__img {
  max-width: 85vw;
  max-height: 70vh; /* 縦方向にはみ出さないように制限 */
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}

/* Wide frames (aerial shots) — full bleed */
.gallery-frame--wide .gallery-frame__img {
  max-width: 100%;
  margin-inline: 0;
}

/* ─── Caption ─────────────────────────────────────────────── */
.gallery-caption {
  display: none;
  align-items: baseline;
  gap: 1.2rem;
  justify-content: center;
  margin-top: 1.6rem;
  padding-inline: 2rem;
}

.caption-num {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--muted);
  opacity: 0.6;
  flex-shrink: 0;
}

.caption-text {
  font-family: var(--font-en-display);
  font-size: clamp(0.85rem, 1.4vw, 1.05rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.08em;
  color: rgba(222, 216, 204, 0.75);
}

:lang(ja) .caption-text {
  font-family: var(--font-ja-display);
  font-style: normal;
  letter-spacing: 0.12em;
}

.caption-year {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--muted);
  opacity: 0.5;
  flex-shrink: 0;
}

/* ─── Interlude text (between photographs) ────────────────── */
.gallery-interlude {
  text-align: center;
  padding: max(6rem, 8vw) 2rem;
}

.interlude-text {
  font-family: var(--font-en-display);
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.06em;
  line-height: 2;
  color: rgba(222, 216, 204, 0.65);
  max-width: 640px;
  margin: 0 auto;
}

:lang(ja) .interlude-text {
  font-family: var(--font-ja-display);
  font-style: normal;
  letter-spacing: 0.15em;
  line-height: 2.4;
}

/* ─── Archive link ─────────────────────────────────────────── */
.gallery-archive {
  text-align: center;
  padding: max(3rem, 4vw) 2rem max(6rem, 10vw);
}

.archive-link {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid rgba(222, 216, 204, 0.2);
  padding-bottom: 0.3rem;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.archive-link:hover {
  color: var(--text);
  border-color: rgba(222, 216, 204, 0.5);
}

/* ─── Related editions section ────────────────────────────── */
.gallery-editions {
  border-top: 1px solid rgba(222, 216, 204, 0.08);
  padding: max(5rem, 8vw) 2rem max(7rem, 12vw);
  text-align: center;
}

.editions-label {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.5;
  margin: 0 0 4rem;
}

.editions-links {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.edition-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 2rem 4rem;
  transition: opacity 0.3s ease;
}

.edition-item:hover {
  opacity: 0.7;
}

.edition-type {
  font-family: var(--font-sans);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.6;
}

.edition-title {
  font-family: var(--font-en-display);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.06em;
  color: var(--text);
  line-height: 1.2;
}

:lang(ja) .edition-title {
  font-family: var(--font-ja-display);
  font-style: normal;
  letter-spacing: 0.1em;
}

.edition-meta {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: var(--muted);
  opacity: 0.5;
}

.editions-divider {
  display: block;
  width: 1px;
  height: 80px;
  background: rgba(222, 216, 204, 0.12);
  align-self: center;
}

/* ─── Fixed Footer on Gallery Page ────────────────────────── */
.gallery-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw;
  height: auto;
  z-index: 90;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2.5rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 60%, rgba(0, 0, 0, 0) 100%);
  pointer-events: auto;
  box-sizing: border-box;
  border-top: none;
}

.gallery-footer p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: rgba(222, 216, 204, 0.45) !important;
  text-transform: none;
}

.gallery-footer .footer-links {
  display: flex;
  gap: 1.8rem;
  flex-wrap: wrap;
}

.gallery-footer .footer-links a {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(222, 216, 204, 0.45) !important;
  transition: color 0.3s ease;
  text-decoration: none;
}

.gallery-footer .footer-links a:hover {
  color: var(--text) !important;
}

@media (max-width: 768px) {
  .gallery-footer {
    padding: 0.8rem 1.2rem calc(0.8rem + env(safe-area-inset-bottom));
    flex-direction: row;
    justify-content: space-between;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 30%, rgba(0, 0, 0, 0.4) 70%, rgba(0, 0, 0, 0) 100%);
  }

  .gallery-footer p {
    font-size: 0.65rem;
  }

  .gallery-footer .footer-links {
    gap: 0.8rem;
  }

  .gallery-footer .footer-links a {
    font-size: 0.7rem;
  }
}

/* ─── Scroll reveal ──────────────────────────────────────────  */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ─── Tablet (769px – 1024px) ───────────────────────────────
   タブレット帯: 写真は全幅、余白はやや詰める
   ─────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  /* 写真を全幅に（82vwの中途半端な余白をなくす） */
  .gallery-frame__img {
    max-width: 100%;
    margin-inline: 0;
  }

  .gallery-frame--wide .gallery-frame__img {
    max-width: 100%;
  }

  .gallery-frame {
    margin-block: 0;
  }
}

/* ─── Mobile (≤ 768px) ──────────────────────────────────────
   モバイル: フルブリード写真、横スライドレイアウト、余白調整
   ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Opening */
  .gallery-opening {
    padding: 0 1.5rem;
  }

  /* Photo frames: horizontal sizing */
  .gallery-frame {
    margin-block: 0;
    padding: 8vh 4vw 4vh;
  }
  .gallery-frame__img {
    max-height: 65vh;
    max-width: 90vw;
  }

  /* Caption: switch to vertical stack on narrow screens */
  .gallery-caption {
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    margin-top: 1.2rem;
    padding-inline: 1.5rem;
  }

  .caption-num {
    display: none; /* 番号を非表示にしてすっきり */
  }

  .caption-text {
    text-align: center;
    font-size: 0.9rem;
  }

  .caption-year {
    font-size: 0.6rem;
  }

  /* Interlude */
  .gallery-interlude {
    padding: 4rem 1.5rem;
  }

  .interlude-text {
    font-size: clamp(0.95rem, 4.5vw, 1.15rem);
    letter-spacing: 0.04em;
    line-height: 2;
  }

  :lang(ja) .interlude-text {
    font-size: clamp(0.9rem, 4vw, 1.1rem);
    letter-spacing: 0.1em;
    line-height: 2.2;
  }

  /* Archive link */
  .gallery-archive {
    padding: 3rem 1.5rem 6rem;
  }

  /* Editions */
  .gallery-editions {
    padding: 4rem 1.5rem 6rem;
  }

  .editions-links {
    flex-direction: column;
    gap: 0;
  }

  .edition-item {
    padding: 2.5rem 1.5rem;
    width: 100%;
    border-bottom: 1px solid rgba(222, 216, 204, 0.06);
  }

  .edition-item:last-child {
    border-bottom: none;
  }

  .editions-divider {
    display: none;
  }

  .edition-title {
    font-size: clamp(1.3rem, 6vw, 1.8rem);
  }
}

/* ─── Extra small (≤ 390px / iPhone SE etc.) ────────────────  */
@media (max-width: 390px) {
  .opening-eyebrow {
    font-size: 0.72rem;
    letter-spacing: 0.25em;
    margin-bottom: 1.8rem;
  }

  .gallery-caption {
    padding-inline: 1rem;
  }

  .interlude-text {
    font-size: 0.9rem;
  }
}

/* ─── Navigation Buttons ──────────────────────────────────── */
.gallery-nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(222, 216, 204, 0.08);
  color: var(--text);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 95;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
  opacity: 0.5;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.gallery-nav-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(222, 216, 204, 0.25);
  opacity: 1;
  transform: translateY(-50%) scale(1.05);
}

.gallery-nav-btn svg {
  width: 24px;
  height: 24px;
}

.gallery-nav-prev {
  left: 2rem;
}

.gallery-nav-next {
  right: 2rem;
}

@media (max-width: 768px) {
  .gallery-nav-btn {
    width: 42px;
    height: 42px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(222, 216, 204, 0.05);
  }
  .gallery-nav-prev {
    left: 0.8rem;
  }
  .gallery-nav-next {
    right: 0.8rem;
  }
  .gallery-nav-btn svg {
    width: 20px;
    height: 20px;
  }
}

/* ─── Dot Indicators ──────────────────────────────────────── */
.gallery-indicators {
  position: fixed;
  bottom: 3.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.8rem;
  z-index: 95;
  pointer-events: auto;
  transition: opacity 0.3s ease;
}

.gallery-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text);
  opacity: 0.22;
  cursor: pointer;
  border: none;
  padding: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.gallery-dot.active {
  opacity: 1;
  transform: scale(1.4);
}

.gallery-dot:hover {
  opacity: 0.7;
}

@media (max-width: 768px) {
  .gallery-indicators {
    bottom: calc(4.5rem + env(safe-area-inset-bottom));
    gap: 0.65rem;
  }
  .gallery-dot {
    width: 5px;
    height: 5px;
  }
}

/* ─── Integrated Footer (for photo 12) ───────────────────── */
.gallery-integrated-footer {
  margin-top: 3.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  width: 100%;
  max-width: 600px;
  padding-top: 2rem;
  border-top: 1px solid rgba(222, 216, 204, 0.08);
}

.gallery-integrated-footer p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: rgba(222, 216, 204, 0.35);
  text-transform: none;
}

.gallery-integrated-footer .footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.gallery-integrated-footer .footer-links a {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(222, 216, 204, 0.35);
  transition: color 0.3s ease;
}

.gallery-integrated-footer .footer-links a:hover {
  color: var(--text);
}

#frame-12 {
  overflow-y: auto;
  scrollbar-width: none;
}

#frame-12::-webkit-scrollbar {
  display: none;
}

@media (max-width: 768px) {
  .gallery-integrated-footer {
    margin-top: 2rem;
    gap: 0.8rem;
    padding-bottom: 4.5rem; /* 引き上げたインジケーターに被らない十分な余白 */
  }
  .gallery-integrated-footer .footer-links {
    gap: 1.1rem;
  }
}

/* ─── Disable reveal animations for horizontal gallery ───── */
/* 横スクロール時のもたつきや二重アニメーション（上に上がる効果）の違和感を防ぐため無効化 */
body.page-gallery .reveal {
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}