/* =========================================================
   字字珠璣 — 畫卷式版面
   酒精潑墨 × Q版國風｜宣紙 #f0e9d8｜青碧/黛藍/胭脂紅/鎏金
   手機直向優先（390px）；零外部資源
   ========================================================= */

:root {
  /* 依素材實際紙色微調（略暖於原稿 #f2ecdc） */
  --paper:      #f0e9d8;
  --paper-hi:   #f8f3e6;
  --paper-dim:  #e7ddc6;
  --ink:        #2b3a4a;   /* 黛藍墨 */
  --ink-soft:   #55636f;
  --teal:       #2e8f8a;   /* 青碧 */
  --teal-deep:  #1f6f74;
  --navy:       #274b63;
  --rouge:      #c14b4b;   /* 胭脂紅 */
  --rouge-deep: #9d3232;
  --gold:       #c9a227;   /* 鎏金 */
  --gold-hi:    #e6c96a;
  --serif: "Songti TC", "Noto Serif TC", "LiSong Pro", "PMingLiU", serif;
  --kai:   "Kaiti TC", "BiauKai", "DFKai-SB", "TW-Kai", "Songti TC", "Noto Serif TC", serif;
  --sans:  -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
}

/* ---------- 遠景潑墨山水 ---------- */
/* 用 mask 往下淡出（而非蓋色塊），消除素材紙色與 CSS 底色的微差色帶 */
.ink-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: url("../assets/web/bg-ink.jpg") no-repeat center top / cover;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 42%, rgba(0,0,0,.45) 70%, transparent 100%);
          mask-image: linear-gradient(180deg, #000 0%, #000 42%, rgba(0,0,0,.45) 70%, transparent 100%);
}

/* ---------- 桌機答題兩側立繪（裝飾） ---------- */
.side-fig { display: none; }

/* ---------- 掛軸骨架 ---------- */
.scroll-frame {
  position: relative;
  z-index: 1;
  max-width: 560px;
  margin: 0 auto;
  padding: 14px 10px 40px;
}

/* 卷軸桿：黑漆桿身 + 鎏金軸頭 */
.scroll-rod {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  position: relative;
  z-index: 2;
}
.rod-bar {
  flex: 1;
  height: 16px;
  border-radius: 8px;
  background: linear-gradient(180deg, #4a4139 0%, #241f1a 45%, #45392c 100%);
  box-shadow: 0 3px 8px rgba(36,31,26,.45),
              inset 0 1px 0 rgba(230,201,106,.35);
}
.rod-cap {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex: none;
  margin: 0 -4px;
  background: radial-gradient(circle at 34% 30%, var(--gold-hi), var(--gold) 55%, #8a6d14 100%);
  box-shadow: 0 2px 5px rgba(36,31,26,.5);
  z-index: 1;
}
.scroll-rod--top    { margin-bottom: -8px; }
.scroll-rod--bottom { margin-top: -8px; }

/* 宣紙卷面 */
.scroll-paper {
  position: relative;
  padding: 26px 16px 30px;
  background:
    /* 宣紙纖維微紋 */
    repeating-linear-gradient(0deg,
      rgba(43,58,74,.016) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, var(--paper-hi) 0%, var(--paper) 38%, var(--paper) 82%, var(--paper-dim) 100%);
  border-left:  1px solid rgba(201,162,39,.45);
  border-right: 1px solid rgba(201,162,39,.45);
  box-shadow: 0 10px 34px rgba(39,75,99,.28);
}
/* 卷面左右內側淡淡的捲曲陰影 */
.scroll-paper::before,
.scroll-paper::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 14px;
  pointer-events: none;
}
.scroll-paper::before { left: 0;  background: linear-gradient(90deg,  rgba(43,58,74,.08), transparent); }
.scroll-paper::after  { right: 0; background: linear-gradient(-90deg, rgba(43,58,74,.08), transparent); }

/* ---------- 題名 ---------- */
.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
/* 滿版素材圖：inset box-shadow 蓋不到 <img> 內容，一律改用 radial mask 柔邊 */
.brand-emblem {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  object-fit: cover;
  -webkit-mask-image: radial-gradient(circle, #000 58%, transparent 97%);
          mask-image: radial-gradient(circle, #000 58%, transparent 97%);
}
.brand-titlebox {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-title {
  margin: 0;
  display: flex;
  gap: 6px;
  font-family: var(--serif);
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--ink);
  text-shadow: 0 2px 0 rgba(240,233,216,.9),
               2px 3px 6px rgba(39,75,99,.35);
}
/* 四字微錯位，做手寫落款感 */
.brand-title span:nth-child(1) { transform: rotate(-3deg) translateY(2px); }
.brand-title span:nth-child(2) { transform: rotate(2deg)  translateY(-2px); color: var(--teal-deep); }
.brand-title span:nth-child(3) { transform: rotate(-2deg) translateY(1px); }
.brand-title span:nth-child(4) { transform: rotate(3deg)  translateY(-1px); color: var(--rouge); }
/* 直排胭脂印章 */
.brand-seal {
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .3em;
  color: var(--paper-hi);
  background: linear-gradient(160deg, var(--rouge) 0%, var(--rouge-deep) 100%);
  border: 1px solid rgba(248,243,230,.55);
  outline: 2px solid var(--rouge-deep);
  border-radius: 4px;
  padding: 8px 4px 5px;
  transform: rotate(4deg);
  box-shadow: 1px 2px 4px rgba(157,50,50,.4);
}
.brand-sub {
  margin: 0;
  font-size: .85rem;
  letter-spacing: .35em;
  text-indent: .35em;
  color: var(--ink-soft);
}

/* 進入答題後：收起首頁、題名縮小 */
body.in-quiz #screen-home { display: none; }
body.in-quiz .brand { flex-direction: row; justify-content: center; margin-bottom: 12px; }
body.in-quiz .brand-emblem { width: 40px; height: 40px; }
body.in-quiz .brand-title { font-size: 1.5rem; }
body.in-quiz .brand-seal,
body.in-quiz .brand-sub { display: none; }

/* ---------- 角色對峙 VS ---------- */
.vs-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 4px 0 20px;
}
.fighter {
  margin: 0;
  flex: 1;
  max-width: 158px;
  text-align: center;
}
.fighter img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 42% 42% 30% 30% / 30% 30% 22% 22%;
  /* 滿版圖用 radial mask 柔進卷面（inset shadow 蓋不到 img 內容） */
  -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 60%, transparent 98%);
          mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 60%, transparent 98%);
}
.fighter--rival img { transform: scaleX(-1); }
/* 舞台地板橢圓光影 */
.fighter::after {
  content: "";
  display: block;
  height: 12px;
  width: 68%;
  margin: -8px auto 0;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(43,58,74,.18), transparent 68%);
}
.fighter figcaption {
  margin-top: 4px;
  font-family: var(--serif);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--ink-soft);
}
.fighter--player figcaption { color: var(--teal-deep); }
.fighter--rival  figcaption { color: var(--navy); }

.vs-badge {
  flex: none;
  width: 62px;
  height: 62px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.05;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--paper-hi);
  background: radial-gradient(circle at 32% 28%, #d96a5f, var(--rouge) 55%, var(--rouge-deep) 100%);
  border-radius: 50%;
  transform: rotate(-6deg);
  box-shadow: 0 3px 10px rgba(157,50,50,.4);
  position: relative;
}
.vs-badge::after {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 2px dashed var(--gold);
  opacity: .8;
}

/* ---------- 小節標題 ---------- */
.section-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 20px 0 12px;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: .3em;
  text-indent: .3em;
  color: var(--ink);
}
.section-title i {
  flex: 1;
  max-width: 90px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--gold) 45%, var(--rouge) 100%);
}
.section-title i:last-child {
  background: linear-gradient(-90deg, transparent, var(--gold) 45%, var(--rouge) 100%);
}

/* ---------- 題庫卡 ---------- */
.bank-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.bank-card {
  appearance: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 6px 10px;
  font-family: var(--sans);
  background: linear-gradient(180deg, var(--paper-hi), var(--paper));
  border: 1px solid rgba(43,58,74,.18);
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(39,75,99,.1);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  position: relative;
}
/* 圓形裁切 + mask 柔邊；內層 img 放大 1.18 裁掉素材外圈留白聚焦主體 */
.bank-icon {
  display: block;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  overflow: hidden;
  -webkit-mask-image: radial-gradient(circle, #000 58%, transparent 97%);
          mask-image: radial-gradient(circle, #000 58%, transparent 97%);
}
.bank-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.18);
}
.bank-name {
  font-weight: 700;
  font-size: .92rem;
  color: var(--ink);
  letter-spacing: .08em;
}
.bank-count {
  font-size: .74rem;
  color: var(--ink-soft);
}
.bank-card:hover { transform: translateY(-2px); }
.bank-card.is-active {
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 1px rgba(201,162,39,.3),
              0 4px 12px rgba(201,162,39,.28);
}
/* 選中卡右上角落一枚小紅印 */
.bank-card.is-active::after {
  content: "選";
  position: absolute;
  top: -8px;
  right: -6px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: .72rem;
  font-weight: 700;
  color: var(--paper-hi);
  background: var(--rouge);
  border-radius: 5px;
  transform: rotate(8deg);
  box-shadow: 1px 1px 3px rgba(157,50,50,.4);
}

/* ---------- 模式按鈕 ---------- */
#mode-select {
  display: grid;
  gap: 12px;
}
.mode-btn {
  appearance: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
  padding: 14px 12px;
  color: var(--paper-hi);
  /* 手繪筆觸感的不規則圓角 */
  border-radius: 255px 18px 225px 18px / 18px 225px 18px 255px;
  border: 2px solid rgba(248,243,230,.4);
  box-shadow: 0 5px 14px rgba(39,75,99,.28),
              inset 0 1px 0 rgba(248,243,230,.35);
  transition: transform .15s ease, box-shadow .15s ease, filter .15s ease;
}
.mode-btn:active { transform: scale(.97); }
.mode-btn:hover  { filter: brightness(1.06); }
.mode-btn--practice {
  background: linear-gradient(135deg, var(--teal) 0%, var(--teal-deep) 60%, var(--navy) 100%);
}
.mode-btn--battle {
  background: linear-gradient(135deg, #d96a5f 0%, var(--rouge) 55%, var(--rouge-deep) 100%);
}
.mode-name {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: .35em;
  text-indent: .35em;
  text-shadow: 0 1px 3px rgba(39,75,99,.4);
}
.mode-desc {
  font-size: .8rem;
  opacity: .88;
  letter-spacing: .06em;
}

/* ---------- 對戰狀態列 ---------- */
#battle-hud {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 10px 8px;
  background: linear-gradient(180deg, rgba(248,243,230,.85), rgba(240,233,216,.6));
  border: 1px solid rgba(201,162,39,.4);
  border-radius: 12px;
}
#battle-hud[hidden] { display: none; }
.hp-side {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}
.hp-side--b { flex-direction: row-reverse; text-align: right; }
.hp-avatar {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 0 2px var(--gold);
}
/* 逐角色校準取臉位置（rival 髮飾高、臉再往下） */
.hp-avatar--a { object-position: 50% 30%; }
.hp-avatar--b { object-position: 50% 36%; transform: scaleX(-1); }
.hp-meta { flex: 1; min-width: 0; }
.hp-name {
  display: block;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--ink-soft);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hp-num {
  font-family: var(--serif);
  font-size: .85rem;
  color: var(--rouge-deep);
}
.hp-track {
  position: relative;
  height: 12px;
  border-radius: 7px;
  background: rgba(43,58,74,.14);
  box-shadow: inset 0 1px 3px rgba(43,58,74,.25);
  display: flex;
}
/* 綢帶兩端鎏金結釦 */
.hp-track::before,
.hp-track::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: radial-gradient(circle at 35% 30%, var(--gold-hi), var(--gold) 60%, #8a6d14 100%);
  box-shadow: 0 1px 2px rgba(36,31,26,.35);
  z-index: 1;
}
.hp-track::before { left: -4px; }
.hp-track::after  { right: -4px; }
/* B 側血條錨定外緣，雙方皆向中央消退 */
.hp-side--b .hp-track { justify-content: flex-end; }
.hp-fill {
  height: 100%;
  border-radius: 7px;
  /* 潑墨血條：青碧 → 鎏金 → 胭脂 */
  background: linear-gradient(90deg, var(--teal) 0%, var(--gold-hi) 55%, var(--rouge) 100%);
  box-shadow: inset 0 1px 0 rgba(248,243,230,.5);
  transition: width .45s cubic-bezier(.22,1,.36,1);
}
.hp-side--b .hp-fill {
  background: linear-gradient(-90deg, var(--navy) 0%, var(--gold-hi) 55%, var(--rouge) 100%);
}
/* 血量告急（app.js 於 HP≤30 加 .is-low） */
.hp-fill.is-low { animation: hpFlash 1s ease-in-out infinite; }
@keyframes hpFlash {
  0%, 100% { filter: none; }
  50%       { filter: brightness(1.35) saturate(1.4); }
}

/* 連對數（連對 <2 時由 app.js 隱藏） */
.combo {
  flex: none;
  min-width: 64px;
  padding: 6px 4px;
  text-align: center;
  font-family: var(--serif);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--ink);
  background: var(--paper-hi);
  border: 1px dashed rgba(201,162,39,.6);
  border-radius: 50%;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  line-height: 1.2;
}
.combo[hidden] { display: none; }
/* 對手連擊（app.js 加 .is-rival）：黛藍警示 */
.combo.is-rival {
  color: var(--paper-hi);
  background: radial-gradient(circle, #3b5b73 40%, #22384a 100%);
  border-color: rgba(59,91,115,.7);
}
/* 連對更新時的印章跳出動畫（app.js 重播 .pop） */
.combo.pop { animation: comboPop .35s ease; }
@keyframes comboPop {
  0%   { transform: scale(.4) rotate(-10deg); opacity: 0; }
  70%  { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); }
}
/* 連對 3 以上（app.js 加 .is-hot）：鎏金燃燒 */
.combo.is-hot {
  color: var(--rouge-deep);
  border-style: solid;
  border-color: var(--gold);
  background: radial-gradient(circle, var(--paper-hi) 40%, var(--gold-hi) 100%);
  animation: comboGlow .9s ease-in-out infinite;
}
.combo.is-hot.pop {
  animation: comboPop .35s ease, comboGlow .9s ease-in-out .35s infinite;
}
@keyframes comboGlow {
  0%, 100% { box-shadow: 0 0 4px 1px rgba(230,201,106,.5); transform: scale(1); }
  50%       { box-shadow: 0 0 16px 5px rgba(230,201,106,.85); transform: scale(1.06); }
}

/* ---------- 答題區：灑金箋 ---------- */
#quiz-area[hidden] { display: none; }
.quiz-card {
  position: relative;
  padding: 26px 16px 18px;
  border: 1px solid rgba(193,75,75,.4);
  border-radius: 10px;
  background-image:
    /* 灑金：三層錯位金點 */
    radial-gradient(circle at 18% 24%, rgba(201,162,39,.3) 0 1.6px, transparent 2.4px),
    radial-gradient(circle at 72% 58%, rgba(230,201,106,.34) 0 1.2px, transparent 2px),
    radial-gradient(circle at 44% 86%, rgba(201,162,39,.22) 0 1.8px, transparent 2.6px),
    linear-gradient(180deg, var(--paper-hi) 0%, var(--paper) 100%);
  background-size: 130px 130px, 90px 90px, 170px 170px, 100% 100%;
  box-shadow: 0 6px 18px rgba(39,75,99,.15);
}
/* 鎏金角花 */
.quiz-card::before,
.quiz-card::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--gold);
  pointer-events: none;
}
.quiz-card::before {
  top: -2px; left: -2px;
  border-right: 0; border-bottom: 0;
  border-top-left-radius: 10px;
}
.quiz-card::after {
  bottom: -2px; right: -2px;
  border-left: 0; border-top: 0;
  border-bottom-right-radius: 10px;
}

/* 徽章騎在題目卡頂端 */
.card-seal {
  position: absolute;
  top: -20px;
  left: 50%;
  width: 40px;
  height: 40px;
  transform: translateX(-50%) rotate(-6deg);
  border-radius: 50%;
  object-fit: cover;
  -webkit-mask-image: radial-gradient(circle, #000 55%, transparent 96%);
          mask-image: radial-gradient(circle, #000 55%, transparent 96%);
}

/* 練習/對戰 模式偽印章 */
.mode-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .25em;
  color: var(--paper-hi);
  padding: 6px 3px 4px;
  border-radius: 4px;
  transform: rotate(3deg);
  box-shadow: 1px 1px 3px rgba(43,58,74,.3);
}
body.mode-practice .mode-tag { background: var(--teal-deep); }
body.mode-battle   .mode-tag { background: var(--rouge); }

/* 題目文字用楷體（國小課本字體，降低認字負擔） */
#question-text {
  margin: 0 0 18px;
  padding: 0 24px; /* 避開右上角模式印章 */
  font-family: var(--kai);
  font-size: clamp(1.25rem, 5vw, 1.7rem);
  font-weight: 700;
  line-height: 1.7;
  color: var(--ink);
  text-align: center;
  min-height: 2.4em;
}

/* 選項：自動編甲乙丙丁 */
#options { counter-reset: opt; display: grid; gap: 10px; }
#options button {
  counter-increment: opt;
  appearance: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  display: block;
  width: 100%;
  padding: 13px 14px 13px 46px;
  text-align: left;
  font-family: var(--sans);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  background: linear-gradient(180deg, var(--paper-hi), var(--paper));
  border: 1.5px solid rgba(43,58,74,.28);
  border-radius: 160px 12px 160px 12px / 12px 120px 12px 120px;
  box-shadow: 0 2px 6px rgba(39,75,99,.1);
  transition: transform .14s ease, border-color .14s ease, box-shadow .14s ease;
}
#options button::before {
  content: counter(opt, cjk-heavenly-stem);
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: .82rem;
  font-weight: 800;
  color: var(--paper-hi);
  background: var(--navy);
  border-radius: 6px;
}
#options button:hover {
  transform: translateX(3px);
  border-color: var(--teal);
  box-shadow: 0 3px 10px rgba(46,143,138,.25);
}
#options button:active { transform: scale(.985); }

/* 對戰模式選項：墨玉籤（與練習灑金箋視覺分家） */
body.mode-battle #options button {
  border-color: rgba(39,75,99,.5);
  background: linear-gradient(180deg, #eef0e9, var(--paper));
}
body.mode-battle #options button::before { background: var(--rouge-deep); }

/* --- 答對：墨暈擴散 + 金光（青碧淡染保持墨染感） --- */
#options button.correct {
  border-color: var(--gold);
  background:
    linear-gradient(180deg, rgba(46,143,138,.1), rgba(46,143,138,.18)),
    linear-gradient(180deg, var(--paper-hi), var(--paper));
  animation: goldGlow .8s ease forwards;
}
#options button.correct::before { background: var(--teal-deep); }
#options button.correct::after {
  content: "";
  position: absolute;
  inset: -20%;
  border-radius: 50%;
  background: radial-gradient(circle,
              rgba(46,143,138,.4) 0%,
              rgba(201,162,39,.25) 45%,
              transparent 70%);
  animation: inkBloom .8s ease forwards;
  pointer-events: none;
}
@keyframes inkBloom {
  0%   { transform: scale(.15); opacity: .95; }
  70%  { opacity: .5; }
  100% { transform: scale(1.7); opacity: 0; }
}
@keyframes goldGlow {
  0%   { box-shadow: 0 0 0 0 rgba(230,201,106,0); }
  40%  { box-shadow: 0 0 20px 5px rgba(230,201,106,.85); }
  100% { box-shadow: 0 0 8px 2px rgba(230,201,106,.4); }
}

/* --- 答錯：紅墨潑濺 + 顫抖 --- */
#options button.wrong {
  border-color: var(--rouge);
  background: linear-gradient(180deg, #f7e8e4, #f2dcd6);
  animation: inkShake .45s ease;
}
#options button.wrong::before { background: var(--rouge-deep); }
#options button.wrong::after {
  content: "";
  position: absolute;
  right: -8%;
  top: -30%;
  width: 60%;
  height: 160%;
  background:
    radial-gradient(circle at 60% 45%, rgba(193,75,75,.4) 0 22%, transparent 40%),
    radial-gradient(circle at 30% 70%, rgba(157,50,50,.3) 0 10%, transparent 24%),
    radial-gradient(circle at 78% 76%, rgba(193,75,75,.32) 0 8%, transparent 20%);
  animation: splashIn .5s ease forwards;
  pointer-events: none;
}
@keyframes splashIn {
  0%   { transform: scale(.2) rotate(-14deg); opacity: 0; }
  55%  { opacity: 1; }
  100% { transform: scale(1) rotate(0deg);   opacity: .8; }
}
@keyframes inkShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-5px) rotate(-.5deg); }
  45% { transform: translateX(4px)  rotate(.4deg); }
  70% { transform: translateX(-3px); }
  85% { transform: translateX(2px); }
}

/* 答錯時揭示正解（app.js 加 .reveal）：青碧淡染＋金框 */
#options button.reveal {
  border: 2px dashed var(--gold);
  background:
    linear-gradient(180deg, rgba(46,143,138,.1), rgba(46,143,138,.16)),
    linear-gradient(180deg, var(--paper-hi), var(--paper));
}
#options button.reveal::before { background: var(--teal-deep); }

/* 對戰結束的徽章 */
.result-emblem {
  display: block;
  width: 110px;
  height: 110px;
  margin: 6px auto;
  border-radius: 50%;
  object-fit: cover;
  -webkit-mask-image: radial-gradient(circle, #000 55%, transparent 96%);
          mask-image: radial-gradient(circle, #000 55%, transparent 96%);
  animation: comboPop .5s ease;
}

/* ---------- 回首頁 ---------- */
.back-btn {
  appearance: none;
  cursor: pointer;
  display: block;
  margin: 16px auto 0;
  padding: 8px 22px;
  font-family: var(--sans);
  font-size: .88rem;
  letter-spacing: .1em;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid rgba(43,58,74,.3);
  border-radius: 999px;
  transition: color .15s ease, border-color .15s ease;
}
.back-btn:hover { color: var(--rouge); border-color: var(--rouge); }

/* ---------- 桌機：卷面加寬、山水兩側露出 ---------- */
@media (min-width: 768px) {
  .scroll-frame { max-width: 840px; padding-top: 28px; }
  .scroll-paper { padding: 36px 48px 44px; }
  .brand-emblem { width: 92px; height: 92px; }
  .brand-title  { font-size: 3.4rem; }
  .fighter      { max-width: 218px; }
  .vs-stage     { gap: 24px; }
  .vs-badge     { width: 78px; height: 78px; font-size: 1.4rem; }
  .bank-grid    { gap: 16px; }
  .bank-icon    { width: 78px; height: 78px; }
  #mode-select  { grid-template-columns: 1fr 1fr; gap: 18px; }
  #options      { gap: 12px; }
  #options button { font-size: 1.16rem; padding: 15px 18px 15px 52px; }
  .hp-avatar    { width: 54px; height: 54px; }
  .hp-track     { height: 14px; }
  .combo        { min-width: 76px; font-size: .95rem; }
}

/* 窄手機：連對章出現時避免角色名被截斷 */
@media (max-width: 420px) {
  .hp-name { letter-spacing: .02em; font-size: .7rem; }
  .combo   { min-width: 56px; font-size: .76rem; }
}

/* 超寬桌機答題中：兩側立繪站上戰場（柔邊＋呼吸浮動） */
@media (min-width: 1100px) {
  body.in-quiz .side-fig {
    display: block;
    position: fixed;
    bottom: 0;
    z-index: 0;
    width: 250px;
    aspect-ratio: 2 / 3;
    background-size: cover;
    background-position: center;
    pointer-events: none;
    opacity: .92;
    -webkit-mask-image: radial-gradient(ellipse 52% 52% at 50% 48%, #000 55%, transparent 82%);
            mask-image: radial-gradient(ellipse 52% 52% at 50% 48%, #000 55%, transparent 82%);
    animation: figBob 4.5s ease-in-out infinite;
  }
  .side-fig--player {
    left: 16px;
    background-image: url("../assets/web/char-player.jpg");
  }
  .side-fig--rival {
    right: 16px;
    background-image: url("../assets/web/char-rival.jpg");
    transform: scaleX(-1);
    animation-delay: -2.2s;
  }
}
@keyframes figBob {
  0%, 100% { translate: 0 0; }
  50%      { translate: 0 -10px; }
}

/* ---------- 動效減量 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}