/* ==========================================================
   《神鵰俠侶》呈現層 v2 —— 直排

   設計語言參照《國寶》：直排、黑底暖白、氛圍動態背景、極簡 HUD。
   術語從歌舞伎換成章回小說：幕→回、番付→名錄、配役→人物。

   關鍵：文字逐段替換，不累積捲動。
   直排的橫向捲軸在各家瀏覽器行為不一致，而且讀起來也不對。
   ========================================================== */

*, *::before, *::after { box-sizing: border-box; }

:root {
  --ink:    #e8e0d0;          /* 暖白 */
  --dim:    rgba(232,224,208,.42);
  --faint:  rgba(232,224,208,.16);
  --paper:  #0a0a0b;          /* 近黑 */
  --red:    #b5533f;          /* 強調 */
  --jade:   #3f6b63;          /* 進度條 */
  --amber:  #a8632e;
  --card:   #ded2b4;          /* 名錄紙色 */
  --card-ink: #2a2118;
  --ease: cubic-bezier(.22,.61,.36,1);

  --fs: clamp(.95rem, 2.1vh, 1.15rem);
  --lh: 1.95;
}

html, body {
  margin: 0; height: 100%; overflow: hidden;
  background: var(--paper); color: var(--ink);
  font-family: "Songti TC","STSong","Noto Serif TC","Source Han Serif TC",
               "PingFang TC","Hiragino Mincho ProN", serif;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
  cursor: default;
}

/* ---------- 背景 ---------- */
#bg {
  position: fixed; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
  opacity: 0; transition: opacity 2.2s var(--ease);
  filter: brightness(.34) saturate(.7);
}
#bg.on { opacity: 1; }

/* 四周壓暗，把視線收到中間與右側 */
#vignette {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(ellipse at 62% 50%, transparent 30%, rgba(0,0,0,.55) 78%),
    linear-gradient(to left, rgba(0,0,0,.62) 0%, transparent 34%);
}

/* 粒子與光柱 */
#fx { position: fixed; inset: 0; z-index: 2; pointer-events: none; }

/* ---------- 頂部分段進度 ---------- */
#progress {
  position: fixed; z-index: 6;
  top: calc(env(safe-area-inset-top, 0px) + 10px);
  left: 3.4vw; right: 3.4vw; height: 5px;
  display: flex; gap: 3px;
}
#progress i {
  flex: 1; background: var(--faint); border-radius: 1px;
  transition: background .8s var(--ease);
}
#progress i.done { background: var(--jade); }
#progress i.now  { background: var(--amber); }

/* ---------- HUD ---------- */
#hud {
  position: fixed; z-index: 7;
  top: calc(env(safe-area-inset-top, 0px) + 34px);
  left: calc(env(safe-area-inset-left, 0px) + 1.6vw);
  display: flex; flex-direction: column; gap: 8px;
}
.tab {
  font: inherit; font-size: .74rem; line-height: 1.35;
  letter-spacing: .1em;
  width: 2.3rem; padding: .5rem 0;
  color: var(--dim); background: transparent;
  border: 1px solid var(--faint); border-radius: 1px;
  cursor: pointer; transition: color .3s var(--ease), border-color .3s var(--ease);
}
@media (hover:hover) { .tab:hover { color: var(--ink); border-color: var(--dim); } }

/* ---------- 對白列：半身立繪＋對話框 ----------
   立繪不站中央，貼著對話框左側，一起排在畫面下方。 */
#dlg-row {
  position: fixed; z-index: 5;
  left: 0; right: 0;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 2.2vh);
  margin: 0 auto;
  width: min(66rem, 82vw);
  display: flex; align-items: flex-end; gap: 0;
  opacity: 0; transform: translateY(10px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}
#dlg-row.on { opacity: 1; transform: translateY(0); }
#dlg-row.hidden { display: none; }

/* 半身立繪：底端與對話框底端切齊，頭頂高出框外 */
#por {
  flex: 0 0 auto;
  width: clamp(8rem, 15vw, 13rem);
  height: auto; max-height: 42vh;
  object-fit: contain; object-position: bottom;
  margin-right: -1.2rem;          /* 稍微壓在框上，兩者連成一體 */
  margin-bottom: -.6rem;
  filter: drop-shadow(0 10px 26px rgba(0,0,0,.6));
  opacity: 0; transition: opacity .4s var(--ease);
}
#por.on { opacity: 1; }

#dlg {
  flex: 1 1 auto; position: relative;
  padding: 1.5rem 2rem 1.7rem 2.6rem;
  background: rgba(9,9,11,.88);
  border: 1px solid var(--faint);
  border-radius: 2px;
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
#dlg-name {
  position: absolute; top: -.9rem; left: 2.4rem;
  padding: .18rem .9rem;
  background: var(--paper);
  border: 1px solid rgba(181,83,63,.4);
  color: var(--red);
  font-size: .82rem; letter-spacing: .28em; text-indent: .28em;
  white-space: nowrap;
}
#dlg-body {
  font-size: clamp(.98rem, 2.1vh, 1.14rem);
  line-height: 1.95; letter-spacing: .06em;
  color: var(--ink);
  min-height: 3.7em;
}
#dlg-text::before { content: "「"; color: var(--dim); }
#dlg-text::after  { content: "」"; color: var(--dim); }

/* 窄螢幕：立繪縮小，對話框吃滿寬度 */
@media (max-width: 599px) {
  #dlg-row { width: 94vw; }
  #por { width: clamp(5.5rem, 26vw, 8rem); max-height: 30vh; margin-right: -.8rem; }
  #dlg { padding: 1.2rem 1rem 1.3rem 1.6rem; }
  #dlg-name { left: 1.4rem; font-size: .74rem; }
  #dlg-body { min-height: 4.2em; }
}
@media (max-height: 480px) {
  #por { max-height: 44vh; }
  #dlg-body { min-height: 2.6em; }
}

/* ---------- 正文（直排） ---------- */
#stage {
  position: fixed; z-index: 4; inset: 0;
  display: flex; justify-content: flex-end; align-items: center;
  padding: 9vh 4.5vw 9vh 12vw;
  pointer-events: none;
}
#text {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  max-height: 100%;
  max-width: 78vw;
  font-size: var(--fs);
  line-height: var(--lh);
  letter-spacing: .12em;
  text-align: start;
}

/* 每一列（＝一段）淡入 */
.para {
  margin: 0 0 .1em 0;
  opacity: 0;
  animation: fadeIn 1.1s var(--ease) forwards;
}
@keyframes fadeIn { to { opacity: 1; } }

/* ---------- 對白 ----------
   直排的傳統做法：說話者自成一列，排在對白右側。
   注意用邏輯屬性（margin-block / padding-inline），
   physical 的 margin-bottom 在 vertical-rl 下會跑錯軸。 */
.para.say {
  display: flex;
  align-items: flex-start;
}
.para.say .who {
  font-weight: 400;
  color: var(--red);
  font-size: .82em;
  letter-spacing: .34em;
  margin-block-end: 1.1em;      /* 名字與對白之間的欄距 */
  padding-inline-start: .15em;
  white-space: nowrap;
  border-inline-end: 1px solid rgba(181,83,63,.28);
  padding-inline-end: .55em;
}
.para.say .who .aside {
  display: block;
  font-style: normal;
  font-size: .78em;
  letter-spacing: .1em;
  color: var(--dim);
  margin-block-start: .5em;
}
.para.say .line {
  padding-inline-start: .3em;   /* 直排中等於從上緣內縮一點 */
}

/* 系統提示 〔…〕 */
.para.sys { color: var(--dim); font-size: .84em; letter-spacing: .3em; }

/* 強調 */
.para em { font-style: normal; color: var(--red); }

/* ---------- 推進指示 ---------- */
#next {
  position: fixed; z-index: 6;
  right: calc(env(safe-area-inset-right, 0px) + 2.2vw);
  bottom: calc(env(safe-area-inset-bottom, 0px) + 2.4vh);
  color: var(--dim); font-size: .8rem;
  opacity: 0; transition: opacity .5s var(--ease);
  animation: bob 1.9s ease-in-out infinite;
}
#next.on { opacity: .75; }
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(4px)} }

/* ---------- 選項（直排卡片，由右至左） ---------- */
#choices {
  position: fixed; z-index: 8; inset: 0;
  display: flex; flex-direction: row-reverse;
  align-items: center; justify-content: center;
  gap: 1.6vw; padding: 10vh 6vw;
  pointer-events: none;
  background: rgba(6,6,7,.55);
  opacity: 0; transition: opacity .6s var(--ease);
}
#choices.on { opacity: 1; pointer-events: auto; }
#choices button {
  writing-mode: vertical-rl; text-orientation: mixed;
  font: inherit; font-size: var(--fs); letter-spacing: .16em;
  line-height: 1.9;
  color: var(--ink); background: rgba(12,12,13,.7);
  border: 1px solid var(--faint); border-radius: 1px;
  padding: 2.2vh 1.1vw; max-height: 74vh; min-width: 3.2rem;
  cursor: pointer;
  opacity: 0; animation: fadeIn .7s var(--ease) forwards;
  transition: border-color .3s var(--ease), color .3s var(--ease),
              background .3s var(--ease);
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
}
@media (hover:hover) {
  #choices button:hover { border-color: var(--red); color: #fff; background: rgba(20,14,13,.85); }
}

/* ---------- 覆蓋層 ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 20;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: var(--paper);
  transition: opacity .9s var(--ease);
}
.overlay.hidden { opacity: 0; pointer-events: none; }

/* 卷首 */
.t-name {
  font-size: clamp(2.4rem, 7vh, 4rem); line-height: 1.24;
  letter-spacing: .06em; text-align: center; margin-bottom: 1.6rem;
}
.t-sub { color: var(--dim); letter-spacing: .5em; text-indent: .5em; font-size: .8rem; margin-bottom: 3.2rem; }
.t-btn {
  font: inherit; font-size: 1rem; letter-spacing: .4em; text-indent: .4em;
  padding: .9rem 2.6rem; min-height: 3rem;
  color: var(--ink); background: transparent;
  border: 1px solid transparent; border-radius: 1px; cursor: pointer;
  transition: letter-spacing .4s var(--ease), color .3s var(--ease);
}
.t-btn.outlined { border-color: var(--jade); }
@media (hover:hover) { .t-btn:hover { letter-spacing: .62em; color: #fff; } }
/* 脫困出口：存檔壞掉時，使用者要有辦法自己重來 */
.t-btn.small {
  font-size: .76rem; letter-spacing: .24em; text-indent: .24em;
  padding: .5rem 1.4rem; min-height: 2.3rem;
  color: var(--dim); margin-top: .6rem;
}
.t-foot {
  position: absolute; bottom: 2.4rem; color: var(--dim);
  font-size: .68rem; letter-spacing: .1em; text-align: center; padding: 0 1.5rem;
}

/* 凡例：直排數列，由右至左 */
#preface-cols {
  writing-mode: vertical-rl;
  max-height: 62vh; font-size: var(--fs); line-height: 2.1;
  letter-spacing: .16em; margin-bottom: 3rem;
}
#preface-cols p { margin: 0 0 1.4em 0; opacity: 0; animation: fadeIn 1s var(--ease) forwards; }
#preface-cols p.warn { color: var(--red); }

/* 回目卡 */
#chapter-card { background: transparent; }
#chapter-card::before {
  content: ""; position: absolute; inset: 0;
  background: rgba(6,6,7,.72); z-index: -1;
}
.cc-inner {
  writing-mode: vertical-rl;
  display: flex; align-items: center; gap: 1.4rem;
  max-height: 70vh;
}
.cc-num { color: var(--red); font-size: .8rem; letter-spacing: .5em; }
.cc-title {
  font-size: clamp(1.7rem, 5.2vh, 2.9rem);
  letter-spacing: .22em;
  border-right: 1px solid var(--red); padding-right: 1.1rem;
}

/* 名錄：紙感卡片 */
#roster { background: rgba(4,4,5,.66); }
.paper {
  width: min(76vw, 62rem); height: min(78vh, 40rem);
  background: var(--card); color: var(--card-ink);
  border-radius: 2px; box-shadow: 0 24px 70px rgba(0,0,0,.6);
  padding: 2.4rem 2.6rem 1rem;
  display: flex; flex-direction: column;
  position: relative;
}
.paper-head {
  writing-mode: vertical-rl; align-self: flex-end;
  font-size: 1.35rem; letter-spacing: .5em;
  border-left: 1px solid var(--card-ink); padding-left: .7rem; margin-bottom: 1rem;
}
#cast {
  writing-mode: vertical-rl; flex: 1; min-height: 0;
  align-self: flex-end; margin-right: 1.6rem;
  font-size: 1.02rem; letter-spacing: .16em; line-height: 2.4;
  overflow-x: auto; max-height: 100%;
}
#cast p { margin: 0 0 .9em 0; border-right: 2px solid rgba(42,33,24,.5); padding-right: .5rem; }
#cast p.unmet { color: rgba(42,33,24,.28); border-right-color: transparent; }
.paper-foot {
  border-top: 1px solid rgba(42,33,24,.28); padding-top: .9rem;
  display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap;
  font-size: .86rem; letter-spacing: .1em;
}
.paper-foot b { color: var(--red); font-weight: 400; margin-right: .4em; }
.paper-foot i { font-style: normal; }
#btn-back {
  margin-left: auto; font: inherit; font-size: .84rem; letter-spacing: .3em;
  padding: .5rem 1.2rem; min-height: 2.4rem;
  background: transparent; color: var(--card-ink);
  border: 1px solid rgba(42,33,24,.4); border-radius: 1px; cursor: pointer;
}

.hidden { display: none !important; }

/* ---------- 響應式 ---------- */

/* 手機直式：文字欄變窄，字級縮小，選項改上下排 */
@media (max-width: 599px) {
  :root { --fs: clamp(.88rem, 2.2vh, 1rem); --lh: 1.85; }
  #stage { padding: 8vh 4vw 8vh 8vw; }
  #text { max-width: 84vw; }
  #choices { padding: 8vh 4vw; gap: 3vw; }
  #choices button { padding: 1.6vh .8rem; max-height: 62vh; }
  .paper { width: 92vw; height: 82vh; padding: 1.6rem 1.4rem .8rem; }
  #hud { left: 2vw; }
}

/* 矮螢幕（手機橫置）：壓縮上下留白 */
@media (max-height: 480px) {
  :root { --fs: .86rem; --lh: 1.75; }
  #stage { padding: 7vh 4vw 7vh 9vw; }
  #choices button { max-height: 72vh; padding: 1.2vh .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  .para, #choices button, #preface-cols p { animation-duration: .01s; }
  #next { animation: none; }
  #bg { transition-duration: .01s; }
}