:root {
  --bg: #0d0f14;
  --bg2: #161a22;
  --fg: #e8e4da;
  --muted: #9a948a;
  --gold: #c9a86a;
  --serif: "Yu Mincho Demibold", "YuMincho", "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif TC", serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--serif);
  font-weight: 600; /* Yu Mincho Demibold */
  background: var(--bg);
  color: var(--fg);
  line-height: 1.9;
}

/* ---------- Top bar ---------- */
#topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(13, 15, 20, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #2a2e38;
  padding-top: env(safe-area-inset-top);
}
#brand {
  display: block;
  width: 100%;
  padding: 11px 16px;
  background: none;
  border: none;
  text-align: center;
  cursor: pointer;
  line-height: 0;
}
#brand img { height: 25px; filter: brightness(0) invert(1); }

/* ---------- Tabs ---------- */
#tabs {
  position: sticky;
  top: calc(47px + env(safe-area-inset-top));
  z-index: 10;
  display: flex;
  background: var(--bg2);
  border-bottom: 1px solid #2a2e38;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.tab {
  flex: 1 1 auto;
  min-width: 0;
  padding: 12px 6px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.05em;
  white-space: nowrap;
  cursor: pointer;
}
.tab.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- Pages ---------- */
.page { display: none; padding-bottom: 48px; }
.page.active { display: block; animation: pageIn 0.5s ease; }
.page.leaving { animation: pageOut 0.24s ease forwards; }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(14px); }
}
@keyframes pageOut {
  to { opacity: 0; }
}

.page h2 {
  padding: 28px 20px 8px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.15em;
}
.page h2 .en {
  display: block;
  font-size: 12px;
  color: var(--gold);
  font-style: italic;
  letter-spacing: 0.1em;
}

/* ---------- Home ---------- */
.hero { position: relative; }
.hero > img { width: 100%; display: block; }
/* 底部漸層：讓主視覺自然融入頁面深色背景 */
.hero-fade {
  position: absolute;
  inset: auto 0 0 0;
  height: 90px;
  background: linear-gradient(transparent, rgba(13, 15, 20, 0.95));
  pointer-events: none;
}
/* 直式墨黑標題：依主視覺海報位置放右上（下方為白色紙紋山景） */
/* 選擇器需壓過 .hero > img 的 width:100%（寬度以 max-width 為主） */
.hero .hero-title-ink {
  position: absolute;
  top: 3%;
  right: 5%;
  width: 39%;
  max-width: 145px;
}
.hero-sub {
  font-size: 12px;
  color: var(--gold);
  font-style: italic;
  letter-spacing: 0.12em;
  margin-top: 8px;
}
.intro { padding: 28px 24px; text-align: center; }
.sponsors { display: block; width: 100%; }
.allworks {
  margin-top: 26px;
  font-size: clamp(10px, 3vw, 13px);
  letter-spacing: 0.05em;
  white-space: nowrap;
  color: var(--fg);
}
.quote {
  margin-top: 10px;
  font-size: clamp(16px, 5vw, 23px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #ffffff;
  white-space: nowrap;
}
.showdate {
  margin-top: 14px;
  font-size: clamp(11px, 3.2vw, 14px);
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: var(--muted);
}
.scroll-hint {
  margin-top: 26px;
  font-size: 10px;
  letter-spacing: 0.35em;
  color: var(--muted);
}
.scroll-hint .arrow {
  display: block;
  margin-top: 2px;
  letter-spacing: 0;
  animation: bob 1.8s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: none; }
  50% { transform: translateY(5px); }
}

/* 回到首頁頂端：捲動離開 hero 一段距離後浮現 */
.fab {
  position: fixed;
  right: 20px;
  bottom: calc(24px + env(safe-area-inset-bottom));
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gold);
  color: #17191f;
  border: none;
  font-size: 19px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5);
  z-index: 15;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  cursor: pointer;
}
.fab.show { opacity: 1; pointer-events: auto; transform: none; }

/* ---------- Artist slider ---------- */
.slider {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.slider::-webkit-scrollbar { display: none; }
.slide {
  flex: 0 0 100%;
  scroll-snap-align: center;
  padding: 16px 24px;
  /* 垂直捲動在各 slide 內部：介紹長度不一時，換頁必定從頂部開始 */
  overflow-y: auto;
  scrollbar-width: none;
}
.slide::-webkit-scrollbar { display: none; }
.slide img {
  width: 100%;
  max-height: 55vh;
  object-fit: cover;
  object-position: center top;   /* 直式照片從頂部裁切，頭頂不被切掉 */
  border-radius: 4px;
  display: block;
}
.slide h3 {
  margin-top: 16px;
  font-size: 20px;
  letter-spacing: 0.1em;
}
.slide .role {
  display: block;
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.15em;
}
.slide p { margin-top: 12px; font-size: 15px; text-align: justify; }
.slide a { color: var(--gold); }

.dots { display: flex; justify-content: center; gap: 8px; padding: 12px; }
.dots i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #3a3e48;
}
.dots i.on { background: var(--gold); }

.hint {
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
}

/* ---------- Program book ---------- */
.toolbar {
  display: flex;
  justify-content: flex-end;
  padding: 8px 20px 0;
}
.font-size { display: flex; gap: 6px; }
.font-size button {
  padding: 7px 12px;
  background: var(--bg2);
  color: var(--fg);
  border: 1px solid #2a2e38;
  border-radius: 4px;
  font-family: var(--serif);
  font-size: 13px;
  cursor: pointer;
}

.book {
  scroll-margin-top: 110px;
  position: relative;
  margin: 12px 16px 0;
  perspective: 1600px;
  min-height: 55vh;
}
.book-page {
  padding: 24px 22px 28px;
  font-size: var(--book-font, 15px);
  text-align: justify;
  background: var(--bg2);
  border: 1px solid #2a2e38;
  border-radius: 6px;
  min-height: 55vh;
  transform-style: preserve-3d;
}
.book-page.flip-out-next { animation: flipOutN 0.18s ease-in forwards; }
.book-page.flip-in-next { animation: flipInN 0.22s ease-out; }
.book-page.flip-out-prev { animation: flipOutP 0.18s ease-in forwards; }
.book-page.flip-in-prev { animation: flipInP 0.22s ease-out; }
@keyframes flipOutN { to { transform: rotateY(-70deg); opacity: 0.2; } }
@keyframes flipInN { from { transform: rotateY(70deg); opacity: 0.2; } }
@keyframes flipOutP { to { transform: rotateY(70deg); opacity: 0.2; } }
@keyframes flipInP { from { transform: rotateY(-70deg); opacity: 0.2; } }
.book-page h3 {
  text-align: center;
  font-size: 1.3em;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}
.book-page .composer {
  text-align: center;
  font-size: 0.9em;
  color: var(--gold);
}
.book-page .performers {
  text-align: center;
  /* 固定單行：協奏曲的演出者名單最長，字級隨螢幕寬度微縮以避免折行 */
  font-size: min(2.5vw, 12.8px);
  white-space: nowrap;
  color: var(--muted);
  margin: 8px 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid #2a2e38;
}
.book-page p + p { margin-top: 0.9em; }
.book-page.intermission {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  font-size: 22px;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.book-nav {
  position: absolute;
  top: 0; bottom: 0;
  width: 22%;
  background: none;
  border: none;
  cursor: pointer;
}
.book-nav.prev { left: 0; }
.book-nav.next { right: 0; }

.book-footer {
  display: flex;
  justify-content: space-between;
  padding: 10px 20px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- TOUCH / Brand ---------- */
.full-img { width: 100%; display: block; margin-top: 8px; }
.body-text { padding: 8px 24px; font-size: 15px; }
#page-touch .quote { margin-top: 16px; }
#page-touch .body-text { text-align: justify; }

.brand-text {
  padding: 8px 24px 16px;
  font-size: 15px;
  text-align: justify;
}
.brand-text p + p { margin-top: 0.9em; }
.brand-logo {
  display: block;
  height: 30px;
  margin: 28px auto 4px;
  filter: brightness(0) invert(1);   /* 與 top bar 一致的白色 logo */
}
/* NFC 卡片輪播：JS 自動推進，使用者可隨時手動左右滑，點擊開啟 3D 檢視 */
.carousel {
  overflow-x: auto;
  scrollbar-width: none;
  padding: 30px 0 16px;
}
.carousel + .carousel { padding-top: 6px; }
.carousel::-webkit-scrollbar { display: none; }
.car-track {
  display: flex;
  width: max-content;
}
.car-track img {
  height: 44vh;
  max-height: 380px;
  margin-right: 22px;
  border-radius: 10px;
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.6);
  cursor: pointer;
}

/* 3D 卡片檢視器 */
.viewer {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.92);
  display: grid;
  place-items: center;
  animation: fadeIn 0.25s ease;
}
.viewer[hidden] { display: none; }
@keyframes fadeIn { from { opacity: 0; } }
.viewer-backdrop { position: absolute; inset: 0; }
.viewer-stage { position: relative; z-index: 1; perspective: 1500px; }
.card3d {
  position: relative;
  width: 74vw;
  max-width: 330px;
  aspect-ratio: 479 / 760;
  transform-style: preserve-3d;
  transform: rotateY(0deg);
  cursor: grab;
  touch-action: none;
  --t: 3px;    /* 卡片厚度：貼近實體卡片比例 */
  --r: 12px;   /* 需與 .face 的 border-radius 一致 */
  --metal: linear-gradient(115deg,
    #6f5d3e 0%, #cdb684 18%, #f7efd8 38%,
    #a8905f 55%, #e8d9ae 75%, #71603f 100%);   /* 金屬側邊 */
}
.card3d:active { cursor: grabbing; }
.card3d .face {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--r);
  backface-visibility: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.75);
}
.card3d .front { transform: translateZ(calc(var(--t) / 2)); }
.card3d .back { transform: rotateY(180deg) translateZ(calc(var(--t) / 2)); }
/* 卡片厚度：一疊與卡面同圓角的薄層，堆疊輪廓即圓角薄板，四角天生密合 */
.card3d .ply {
  position: absolute;
  inset: 0;
  border-radius: var(--r);
  background: var(--metal);
  transform: translateZ(calc(var(--t) * var(--i)));
}
.viewer-close {
  position: absolute;
  top: calc(16px + env(safe-area-inset-top));
  right: 20px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  color: #fff;
  font-size: 34px;
  line-height: 1;
  cursor: pointer;
}
.viewer-hint {
  position: absolute;
  bottom: calc(28px + env(safe-area-inset-bottom));
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  pointer-events: none;
}
.social {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 24px;
}
.social a {
  width: 52px;
  height: 52px;
  background: #f5f2ea;
  border-radius: 12px;
  display: grid;
  place-items: center;
}
.social svg {
  width: 30px;
  height: 30px;
  fill: #17191f;
}
footer {
  margin-top: 40px;
  text-align: center;
  font-size: 10px;
  color: #555a64;
  letter-spacing: 0.1em;
}

@media (min-width: 700px) {
  main { max-width: 640px; margin: 0 auto; }
}

/* 團員名單 */
.roster { margin-top: 20px; border-top: 1px solid #2a2e38; padding-top: 14px; }
.roster-title { font-size: 15px; letter-spacing: 0.25em; color: var(--gold); }
.roster p { display: flex; gap: 10px; margin-top: 3px; font-size: 13px; text-align: left; line-height: 1.75; }
.roster span { flex: 0 0 72px; color: var(--muted); }
.roster .names { flex: 1 1 auto; color: var(--fg); }
/* 人名不在中間被折斷：整個名字一起換行 */
.nm { white-space: nowrap; font-style: normal; }
.roster-note { color: var(--muted); font-size: 12px; }

/* 售票導連 */
.ticket-link {
  display: block;
  width: fit-content;
  margin: 20px auto 0;
  padding: 12px 36px;
  border: 1px solid var(--gold);
  border-radius: 6px;
  color: var(--gold);
  text-decoration: none;
  letter-spacing: 0.12em;
  font-size: 15px;
}

/* 公司簡介小節 */
.brand-sub { margin-top: 1.5em; color: var(--gold); letter-spacing: 0.25em; }
.brand-events { text-align: left; }