/* ===== Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}
:root {
  /* 右端との余白（pxで調整） */
  --bgm-right-space: 10px;

  /* sceneブロックとBGMブロックの間隔 */
  --bgm-inner-gap: 6px;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Yu Gothic", sans-serif;
  background: linear-gradient(to top, #31466e, #0c1525);
  color: #f8fafc;
}

/* ===== Header ===== */
.room-header {
  /*position: sticky;
  top: 0;*/
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  /*background: linear-gradient(to left, #868a8b, #2d405f);
  border-bottom: 1px solid rgba(189, 189, 189, 0.1);*/
}

.room-header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.site-title {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.75;
}

.room-title h1 {
  margin: 0;
  font-size: 18px;
}

.room-title p {
  margin: 2px 0 0;
  font-size: 16px;
  
}

  /* BGM周りを横並び＆距離を詰める */
.room-header-right {
  margin-left: auto;                         /* 左側から押し出して右寄せ */
  margin-right: var(--bgm-right-space);      /* 右端との距離を変数で制御 */
  display: flex;
  align-items: center;
  gap: var(--bgm-inner-gap);                /* scene と BGM の間隔を変数で制御 */
}

.room-header-right .slide-control {
  margin-right: var(--bgm-right-space);   /* ← ここで距離を調整 */
}
  /* ラベルの位置＆フォント微調整 */
  .bgm-file-label {
    font-size: 12px;
    margin-left: 2px;
    opacity: 0.85;
    max-width: 140px;  /* スマホで長いタイトル対策 */
  }



.slide-control {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.slide-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.7;
  display: none;
}

.slide-buttons {
  display: flex;
  gap: 4px;
}

.slide-btn {
  border: none;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 11px;
  background: rgba(15, 23, 42, 0.6);
  color: #e5e7eb;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease, color 0.18s ease;
}

.slide-btn:hover {
  background: rgba(55, 65, 81, 0.9);
  transform: translateY(-1px);
}

.slide-btn.is-active {
  background: #eab308;
  color: #111827;
  font-weight: 600;
}

.slide-lamps {
  display: flex;
  margin-top: 6px; /* ← 上との距離をつくる */
  margin-left: 4px; /* ← 上との距離をつくる */
  gap: 4px;
  justify-content: flex-start;
  
}

.lamp {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.4);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.9);
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.lamp.is-active {
  background: #fbbf24;
  box-shadow: 0 0 12px rgba(250, 204, 21, 0.9);
  transform: scale(1.1);
}

.bgm-toggle {
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
  cursor: pointer;
  font-size: 16px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 0 10px rgba(15, 23, 42, 0.8);
  transition: background 0.2s ease, transform 0.2s ease, color 0.2s ease;
  background: rgb(16, 70, 25);
}

.bgm-toggle:hover {
  transform: translateY(-1px);
}

.bgm-toggle.is-playing {
  background: #22c55e;
  color: #022c22;
}

/* ===== Main / Gallery ===== */
.room-main {
  padding: 16px 16px 32px;
}

.photo-room {
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-strip {
  position: relative;
  overflow: hidden;
}

.gallery-track {
  display: flex;
  transition: transform 0.45s ease;
}

/* each panel = width 100% (desktop slider) */
.photo-panel {
  min-width: 100%;
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(180px, 1fr);
  gap: 6px;
}

.photo-card {
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  background: #020617;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.6);
}

.photo-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.photo-card img:hover {
  transform: scale(1.03);
  opacity: 0.95;
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 40;
}

.lightbox.hidden {
  display: none;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
}

.lightbox-inner {
  position: absolute;
  inset: 40px 16px 40px 16px;
  max-width: 960px;
  margin: auto;
  background: #020617;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.9);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lightbox-img-wrapper {
  flex: 1;
  min-height: 0;  /* ← これも入れておくと安全 */
}

.lightbox-inner img {
  width: 100%;
  /* ここを追加 ↓↓↓ */
  max-height: calc(100vh - 180px);
  /* ↑ 180px が「上下の余白＋キャプション分」のイメージ */
  border-radius: 12px;
}

#lightbox-caption {
  margin: 2px 0 0;
  font-size: 20px;  /* 好きなサイズ */
  text-align: center;
  line-height: 1.6;
  color: #ffbf00;
}

.lightbox-close {
  position: absolute;
  top: 8px;
  right: 10px;
  border: none;
  background: transparent;
  color: #e5e7eb;
  font-size: 26px;
  cursor: pointer;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .room-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .slide-control {
    align-items: flex-start;   /* 親コンテナを左寄せに */
  }
@media (max-width: 720px) {


  .room-header-right {
    justify-content: flex-start;
    margin-right: var(--header-right-space); 
    margin-left: 0;
    margin-right: 0;
  }
  /* 必要ならここでサイズだけ調整 */
  .bgm-toggle {
    width: 30px;
    height: 30px;
    font-size: 15px;
  }
}


  .panel-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(150px, 1fr);
  }
}

@media (max-width: 720px) {
  .room-main {
    padding: 12px 8px 24px;
  }

  .gallery-strip {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .gallery-track {
    gap: 8px;
  }

  .photo-panel {
    min-width: 100%;
    scroll-snap-align: start;
  }

  .panel-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: minmax(140px, 1fr);
  }

  .lightbox-inner {
    inset: 32px 6px 32px 6px;
    padding: 12px;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0;
  }

  
  .room-title h1 {
    font-size: 16px;
  }

  .room-title p {
    font-size: 11px;
  }



  
}
.room-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 16px 32px;

  display: flex;
  align-items: flex-start;
  gap: 20px;
}
#lightbox-caption {
  white-space: pre-line;
}

/* ==== BGM ファイル名ラベル ==== */
.bgm-file-label {
  font-size: 12px;
  color: #fde68a;           /* 少し目立つ黄色 */
  opacity: 0.7;
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 再生中はラベルも少し強調 */
.bgm-toggle.is-playing + .bgm-file-label {
  opacity: 1;
  color: #fbbf24;
}