/* ギャラリー：テキスト式の絞り込み（4行）、4シリーズの一覧、拡大表示（ぼけからピントが合って開く）。 */
/* シリーズの色はトップの PORTFOLIO と同じ --theme-*。絞り込みの行の作りは pages.css。メディアクエリは site-media.css。 */

.gallery-filters {
  align-items: end;
  display: grid;
  gap: 1.2rem 2rem;
  grid-template-columns: minmax(0, 1fr) auto;
}

.gallery-filters .filter-group {
  grid-column: 1;
}

.gallery-count {
  color: var(--ink-soft);
  font-family: Georgia, "Times New Roman", var(--font-serif);
  font-size: 0.8rem;
  grid-column: 2;
  grid-row: 1 / span 4;
  letter-spacing: 0.06em;
  margin: 0;
  white-space: nowrap;
}

.gallery-series {
  isolation: isolate;
  padding-block: var(--space-section);
  position: relative;
}

.gallery-series[hidden],
.gallery-item[hidden],
.gallery-empty[hidden],
.lightbox[hidden] {
  display: none;
}

.gallery-series::before {
  background-image: url("../images/paper-washi.webp");
  background-repeat: repeat;
  content: "";
  inset: 0;
  mix-blend-mode: multiply;
  opacity: 0.2;
  pointer-events: none;
  position: absolute;
  z-index: -1;
}

.gallery-series--morning {
  background-color: var(--theme-morning);
}

.gallery-series--daylight {
  background-color: var(--theme-daylight);
}

.gallery-series--golden {
  background-color: var(--theme-golden);
  color: var(--night-paper);
}

.gallery-series--night {
  background-color: var(--theme-night);
  color: var(--night-paper);
}

.gallery-series--golden::before,
.gallery-series--night::before {
  mix-blend-mode: soft-light;
  opacity: 0.16;
}

/* シリーズの先頭：英字の章タイトル（既存の型）＋脇に日本語＋説明文（本文の列の6割の幅） */

.gallery-series-head {
  margin-bottom: var(--space-title);
}

.gallery-series-head .chapter-head {
  margin-bottom: var(--space-block);
}

.gallery-series-text {
  line-height: 2.05;
  max-width: 60%;
  text-wrap: pretty;
}

.gallery-series--golden .chapter-head p,
.gallery-series--night .chapter-head p,
.gallery-series--golden .gallery-series-text,
.gallery-series--night .gallery-series-text {
  color: var(--soft-on-dark);
}

.gallery-grid {
  display: grid;
  gap: clamp(1.25rem, 2.6vw, 2.25rem) clamp(1rem, 2vw, 1.75rem);
  grid-template-columns: repeat(12, minmax(0, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
}

.gallery-item--landscape {
  grid-column: span 6;
}

.gallery-item--portrait {
  grid-column: span 4;
}

/* 写真の枠は既存の額装のまま */
.gallery-thumb {
  background-color: #f7f1e7;
  background-image: url("../images/paper-mat.webp");
  border: 1px solid #d8bc72;
  box-shadow:
    inset 0 0 0 1px #e6cb7c,
    inset 0 0 0 2px #3a2b21,
    inset 0 0 0 3px #aa7a2c,
    0 12px 24px rgba(46, 31, 20, 0.16);
  cursor: zoom-in;
  display: block;
  padding: clamp(0.7rem, 1.4vw, 1.1rem);
  transition: transform 0.4s var(--ease-light), box-shadow 0.4s var(--ease-light);
  width: 100%;
}

.gallery-thumb-image {
  border: 1px solid #a9792c;
  display: block;
  overflow: hidden;
}

.gallery-item--landscape .gallery-thumb-image {
  aspect-ratio: 3 / 2;
}

.gallery-item--portrait .gallery-thumb-image {
  aspect-ratio: 2 / 3;
}

.gallery-thumb-image img {
  /* 額の内枠へ写真を収める内在サイズ制御。 */
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease-light), filter 0.9s var(--ease-light);
  width: 100%;
}

/* 写真の下の一行（撮影・場所・時期）：明朝 0.85rem、--ink-soft */
.gallery-item-caption {
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  gap: 0.2rem 1rem;
  letter-spacing: 0.04em;
  line-height: 1.7;
  margin-top: 1rem;
}

.gallery-series--golden .gallery-item-caption,
.gallery-series--night .gallery-item-caption {
  color: var(--soft-on-dark);
}

.gallery-empty {
  margin-bottom: var(--space-block);
  text-align: center;
}

/* ---- 拡大表示：黒地に写真、下の文字は紙色の明朝。閉じる・矢印は細い線（1px）のアイコン ---- */

.lightbox {
  align-items: center;
  display: grid;
  inset: 0;
  justify-items: center;
  opacity: 0;
  /* 下はサムネイルの列のぶん空ける。スワイプはこのファイルの JS が受けるので、ブラウザの手の動きは止める。 */
  padding: clamp(3.5rem, 7vh, 5rem) clamp(1rem, 7vw, 6rem) 6.75rem;
  position: fixed;
  touch-action: none;
  transition: opacity 0.35s var(--ease-light);
  z-index: 1500;
}

.lightbox.is-open {
  opacity: 1;
}

.lightbox-backdrop {
  background: rgb(17, 12, 9);
  inset: 0;
  position: absolute;
}

.lightbox-figure {
  display: grid;
  gap: 1.25rem;
  justify-items: center;
  max-height: 100%;
  position: relative;
  width: min(100%, 64rem);
  z-index: 1;
}

.lightbox-frame {
  line-height: 0;
  overflow: hidden;
}

.lightbox-image {
  filter: blur(18px) saturate(0.82) brightness(1.06);
  height: auto;
  /* 画面いっぱい：上の余白・下の文字・サムネイルの列を除いた高さまで。 */
  max-height: max(40vh, calc(100vh - 20rem));
  max-width: 100%;
  object-fit: contain;
  opacity: 0.72;
  transform: scale(1.035);
  transition: filter 0.95s var(--ease-light), opacity 0.7s var(--ease-light), transform 1.1s var(--ease-light);
  width: auto;
  user-select: none;
  -webkit-user-drag: none;
}

.lightbox-frame.is-resetting .lightbox-image,
.lightbox-caption.is-resetting > * {
  transition: none;
}

.lightbox-frame.is-sharp .lightbox-image {
  filter: none;
  opacity: 1;
  transform: none;
}

.lightbox-caption {
  color: var(--paper);
  display: grid;
  font-family: var(--font-serif);
  gap: 0.35rem;
  justify-items: center;
  max-width: 40rem;
  text-align: center;
}

.lightbox-caption > * {
  opacity: 0;
  transform: translate3d(0, 8px, 0);
  transition: opacity 0.6s var(--ease-light), transform 0.6s var(--ease-light);
}

.lightbox-caption.is-shown > * {
  opacity: 1;
  transform: none;
}

.lightbox-caption.is-shown > :nth-child(2) {
  transition-delay: 0.12s;
}

.lightbox-caption.is-shown > :nth-child(3) {
  transition-delay: 0.24s;
}

.lightbox-caption.is-shown > :nth-child(4) {
  transition-delay: 0.36s;
}

.lightbox-series {
  margin-top: 0.65rem;
}

.lightbox-series[hidden] {
  display: none;
}

.lightbox-credit {
  font-size: 1rem;
  letter-spacing: 0.06em;
}

.lightbox-credit a {
  border-bottom: 1px solid var(--champagne-gold);
}

.lightbox-meta {
  color: rgba(250, 246, 239, 0.7);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.85rem;
  gap: 0.2rem 1rem;
  justify-content: center;
  letter-spacing: 0.06em;
}

.lightbox-note {
  font-size: 0.9375rem;
  line-height: 1.9;
}

.lightbox-button {
  align-items: center;
  background: transparent;
  border: 0;
  color: var(--paper);
  cursor: pointer;
  display: inline-flex;
  height: 3rem;
  justify-content: center;
  opacity: 0.78;
  padding: 0;
  position: absolute;
  transition: opacity 0.4s var(--ease-light);
  width: 3rem;
  z-index: 2;
}

.lightbox-button svg {
  fill: none;
  height: 1.75rem;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-width: 1;
  width: 1.75rem;
}

.lightbox-button svg path {
  vector-effect: non-scaling-stroke;
}

.lightbox-button--prev {
  left: clamp(0.5rem, 2vw, 1.5rem);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-button--next {
  right: clamp(0.5rem, 2vw, 1.5rem);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-button--close {
  right: clamp(0.5rem, 2vw, 1.5rem);
  top: clamp(0.5rem, 2vw, 1.25rem);
}

.lightbox-count {
  top: clamp(1.4rem, 2.8vw, 2.1rem);
  color: rgba(250, 246, 239, 0.7);
  font-family: var(--font-latin);
  font-size: 0.75rem;
  left: 50%;
  letter-spacing: 0.2em;
  position: absolute;
  transform: translateX(-50%);
  z-index: 2;
}

html.lightbox-open,
html.lightbox-open body {
  overflow: hidden;
}

/* 固定したヘッダーを拡大表示の下へ（拡大表示は main の中にあるため、ヘッダーの重なり順を下げる）。 */
html.lightbox-open .site-header {
  z-index: 0;
}

/* 下のサムネイルの列：表示中の写真は不透明＋細い金線、ほかは薄く。列は横にだけ送る。 */
.lightbox-strip {
  bottom: 1.25rem;
  display: flex;
  gap: 0.6rem;
  left: 50%;
  max-width: calc(100% - 2rem);
  overflow-x: auto;
  padding: 0.3rem;
  position: absolute;
  scrollbar-width: none;
  touch-action: pan-x;
  transform: translateX(-50%);
  z-index: 2;
}

.lightbox-strip::-webkit-scrollbar {
  display: none;
}

.lightbox-strip:empty {
  display: none;
}

.lightbox-strip-item {
  background: none;
  border: 0;
  cursor: pointer;
  flex: none;
  height: 3.5rem;
  opacity: 0.42;
  outline: 1px solid transparent;
  outline-offset: 2px;
  padding: 0;
  transition: opacity 0.4s var(--ease-light), outline-color 0.4s var(--ease-light);
}

.lightbox-strip-item img {
  height: 100%;
  object-fit: cover;
  width: auto;
}

.lightbox-strip-item[aria-current="true"] {
  opacity: 1;
  outline-color: var(--champagne-gold);
}

.lightbox-strip-item:focus-visible {
  opacity: 1;
  outline-color: var(--paper);
}