:root {
  --bg: #faf6f0;
  --card: #ffffff;
  --ink: #2b2420;
  --muted: #8a7f74;
  --accent: #d96b3a;
  --accent-soft: #f3d9c8;
  --correct: #4c9a6a;
  --wrong: #cf5252;
  --border: #ece2d6;
  --serif: "Songti SC", "STSong", Georgia, "Times New Roman", serif;
  font-family: -apple-system, "PingFang SC", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

.app-header {
  padding: 20px 24px 12px;
  text-align: center;
  position: relative;
}
.app-header h1 { margin: 0; font-family: var(--serif); font-weight: 600; font-size: 1.75rem; }
.tagline { margin: 6px 0 0; color: var(--muted); font-size: 0.95rem; }

.ghost-btn, .primary-btn {
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.85rem;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
}
.header-controls {
  position: absolute;
  right: 20px;
  top: 20px;
  display: flex;
  gap: 8px;
}
.user-badge {
  position: absolute;
  left: 20px;
  top: 20px;
}
.user-badge.logged-in {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: var(--accent);
  cursor: default;
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent); }
#zh-toggle-btn[aria-pressed="false"] {
  color: var(--accent);
  background: var(--accent-soft);
}

.primary-btn {
  background: var(--accent);
  color: white;
  border: none;
  font-size: 1rem;
  padding: 10px 24px;
}
.primary-btn:hover { opacity: 0.9; }

.layout {
  display: flex;
  gap: 20px;
  max-width: 920px;
  margin: 10px auto 40px;
  padding: 0 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.scene-panel {
  flex: 2;
  min-width: 320px;
  background: var(--card);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 24px;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.45s ease, transform 0.45s ease;
}
.scene-panel.scene-fade-out {
  opacity: 0;
  transform: translateY(-14px);
}
.scene-panel.scene-fade-in-prep {
  transition: none;
  opacity: 0;
  transform: translateY(14px);
}

.scene-progress {
  display: flex;
  align-items: center;
  border-radius: 999px;
  overflow: hidden; /* 圆角只上在整条外框上，内部小段之间不留缝，连成一条 */
  margin-bottom: 18px;
}
.scene-progress .dot {
  flex: 1;
  height: 6px;
  background: var(--border);
  transition: background 0.3s ease;
}
.scene-progress .dot.done { background: var(--correct); }
.scene-progress .dot.active { background: var(--accent); }

.level-indicator { margin-bottom: 16px; }
.level-bar {
  position: relative;
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  /* 每个级别锚定自己的纯色点，中间全程连续渐变过去（不是只在边界窄幅过渡）。
     锚点按 CEFR 词汇量门槛的真实占比来定，main.js 里的 CEFR_VOCAB_THRESHOLDS
     变了这里也要跟着改，两边要对得上：
     A1 0% · A2 500/4000=12.5% · B1 1100/4000=27.5% · B2 2250/4000=56.25% */
  background: linear-gradient(
    90deg,
    #4c9a6a 0%,      /* A1 绿 */
    #d9a63a 12.5%,   /* A2 琥珀 */
    #6a5acd 27.5%,   /* B1 紫 */
    #a8477a 56.25%,  /* B2 酒红 */
    #a8477a 100%
  );
}
.level-bar-mask {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  background: var(--border);
  transition: width 0.4s ease;
}
.level-label {
  margin: 6px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  text-align: right;
}

.scene-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.avatar {
  font-size: 2.4rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: 50%;
}
.scene-head h2 { margin: 0; font-family: var(--serif); font-weight: 600; font-size: 1.4rem; }
.scene-subtitle { margin: 3px 0 0; color: var(--muted); font-size: 0.9rem; }

/* 翻页回看：往回翻整段游戏历史（已经答对过的句子），翻到底再往前一步会回到当前进度。
   见 main.js 的 buildHistory() / browseIndex。 */
.history-nav {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}
.history-nav-btn {
  flex: 1;
  text-align: center;
}
.ghost-btn:disabled {
  opacity: 0.4;
  cursor: default;
}
.ghost-btn:disabled:hover {
  border-color: var(--border);
  color: var(--ink);
}
.history-banner {
  margin: 0 0 12px;
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.85rem;
  text-align: center;
}
.history-banner.hidden { display: none; }

.dialogue-bubble {
  background: #fdf8f3;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 20px;
}
.npc-en { margin: 0 0 8px; font-size: 1.32rem; font-weight: 600; line-height: 1.4; }
.npc-zh { margin: 0; color: var(--muted); font-size: 1rem; }
body.hide-zh .npc-zh,
body.hide-zh .scene-subtitle,
body.hide-zh .zh-inline {
  display: none;
}

.npc-en .word,
.scene-head h2 .word,
.scene-subtitle .word,
.t-en .word {
  cursor: pointer;
  border-radius: 4px;
  padding: 0 1px;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  transition: background 0.15s;
}
.npc-en .word.word-active,
.scene-head h2 .word.word-active,
.scene-subtitle .word.word-active,
.t-en .word.word-active {
  background: var(--accent-soft);
}

.word-popup {
  position: fixed;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 12px 18px;
  border-radius: 12px;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.5;
  max-width: min(320px, 86vw);
  white-space: normal;
  text-align: center;
  pointer-events: none;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.25);
}
.word-popup.hidden { display: none; }

.play-btn {
  display: block;
  width: 100%;
  margin-top: 14px;
  padding: 15px 18px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--card);
  font-size: 1.08rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}
.play-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.play-btn:active { transform: scale(0.98); }
.play-btn.playing { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.choices {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.choice-btn {
  text-align: left;
  padding: 15px 18px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--card);
  font-size: 1.08rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.choice-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.choice-btn:disabled { cursor: default; opacity: 0.6; }
.choice-btn.wrong {
  border-color: var(--wrong);
  background: #fbe9e9;
  opacity: 1;
}
.choice-btn.correct {
  border-color: var(--correct);
  background: #e6f4ea;
  opacity: 1;
}
.choice-btn.shake {
  animation: shake 0.35s ease;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}

.xp-float {
  position: fixed;
  font-weight: 700;
  color: var(--correct);
  font-size: 1rem;
  pointer-events: none;
  animation: xp-rise 0.9s ease-out forwards;
  z-index: 50;
}
@keyframes xp-rise {
  0% { transform: translateY(0); opacity: 0; }
  15% { opacity: 1; }
  100% { transform: translateY(-40px); opacity: 0; }
}

.hint {
  min-height: 1.2em;
  margin-top: 14px;
  color: var(--wrong);
  font-size: 0.88rem;
  opacity: 0;
  transition: opacity 0.2s;
}
.hint.visible { opacity: 1; }

.sidebar {
  flex: 1;
  min-width: 240px;
  background: var(--card);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 22px;
}
.sidebar h3 { margin: 0 0 16px; font-family: var(--serif); font-weight: 600; font-size: 1.1rem; }

.skill-row {
  margin-bottom: 14px;
}
.skill-label { font-size: 0.94rem; margin-bottom: 6px; }
.skill-bar {
  background: var(--border);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.skill-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.3s ease;
}
.skill-xp { font-size: 0.75rem; color: var(--muted); margin-top: 3px; text-align: right; }

.stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  margin-top: 10px;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(43, 36, 32, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.overlay.visible { display: flex; }

.flashback-card {
  background: var(--card);
  border-radius: 18px;
  padding: 28px;
  max-width: 380px;
  width: 100%;
  text-align: center;
}
.flashback-label { color: var(--muted); font-size: 0.85rem; margin: 0 0 6px; }
.flashback-zh { font-size: 1.4rem; font-weight: 700; margin: 0 0 18px; }
.flashback-feedback { min-height: 1.4em; margin-top: 14px; font-size: 0.9rem; }

.transition-en { font-size: 1.1rem; font-style: italic; margin: 0 0 8px; }
.transition-zh { color: var(--muted); font-size: 0.95rem; margin: 0 0 22px; }

.flashback-answer {
  min-height: 44px;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 6px;
  padding: 10px;
  border: 1.5px dashed var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
}
.flashback-answer.build-correct { border-color: var(--correct); border-style: solid; background: #e6f4ea; }
.flashback-answer.build-wrong { border-color: var(--wrong); border-style: solid; background: #fbe9e9; }
.flashback-wordbank {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}
.word-chip {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--card);
  font-size: 0.95rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.word-chip:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.word-chip:disabled { cursor: default; }
.word-chip.placed { background: var(--accent-soft); border-color: var(--accent); }

.end-screen {
  max-width: 480px;
  margin: 60px auto;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 40px 30px;
}
.end-screen h2 { margin-top: 0; }
#end-summary p { margin: 8px 0; color: var(--ink); }

.account-wrap { position: relative; }
.account-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  min-width: 200px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.12);
  z-index: 60;
  text-align: left;
}
.account-menu-email { font-size: 0.85rem; color: var(--muted); margin: 0 0 10px; word-break: break-all; }
.menu-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 9px 6px;
  border: none;
  background: none;
  font-size: 0.92rem;
  color: var(--ink);
  cursor: pointer;
  border-radius: 8px;
  font-family: inherit;
  text-decoration: none;
  box-sizing: border-box;
}
.menu-item:hover { background: var(--accent-soft); color: var(--accent); }
.menu-divider { height: 1px; background: var(--border); margin: 6px 0; }

.auth-card { max-width: 320px; position: relative; text-align: left; }
.auth-close {
  position: absolute;
  top: 10px;
  right: 12px;
  border: none;
  background: none;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}
.auth-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  font-size: 1rem;
  margin-bottom: 10px;
  box-sizing: border-box;
  font-family: inherit;
}
.auth-full-btn { display: block; width: 100%; margin-bottom: 10px; }
.auth-hint { color: var(--muted); font-size: 0.85rem; margin: 0 0 10px; }
.auth-divider { text-align: center; color: var(--muted); font-size: 0.8rem; margin: 4px 0 10px; }
.auth-error { color: var(--wrong); font-size: 0.85rem; min-height: 1.2em; margin: 4px 0 0; }

.hidden { display: none; }

@media (max-width: 640px) {
  .layout { flex-direction: column; align-items: stretch; }
  .scene-panel, .sidebar { min-width: 0; width: 100%; }
  .header-controls { position: static; justify-content: center; margin-top: 10px; }
  .user-badge { position: static; display: inline-block; margin-top: 10px; }
}

/* 对话总览页（dialogue.html）：把所有台词摊平列成聊天记录，
   NPC 靠左、玩家靠右，点单句播放/整段连续播放都在这一块样式里。 */
.t-page {
  max-width: 720px;
  margin: 0 auto 60px;
  padding: 0 20px;
}

.t-toolbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  padding: 14px 0;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}
.t-count { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }

.t-scene-head {
  margin: 30px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.t-scene-head:first-child { margin-top: 4px; }
.t-scene-title { font-family: var(--serif); font-weight: 600; font-size: 1.1rem; }
.t-scene-sub { color: var(--muted); font-size: 0.85rem; }

.t-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 14px;
}
.t-row-player { flex-direction: row-reverse; }

.t-avatar {
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
}
.t-avatar-player { background: var(--border); }

.t-bubble {
  max-width: 76%;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  padding: 10px 14px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}
.t-bubble:hover { border-color: var(--accent); }
.t-bubble:active { transform: scale(0.98); }
.t-row-player .t-bubble { background: #fdf8f3; }
.t-en { font-size: 1rem; font-weight: 600; line-height: 1.4; }
.t-zh { color: var(--muted); font-size: 0.88rem; margin-top: 3px; }

.t-row.t-playing .t-bubble {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* 隐藏中文模式下，点单句临时把这一行的翻译露出来（dialogue.js 里 3 秒后自动收回）——
   选择器权重要压过上面通用的 body.hide-zh .zh-inline { display: none }。 */
body.hide-zh .t-row.t-zh-reveal .t-zh.zh-inline {
  display: block;
}

.t-sentinel { height: 1px; }

@media (max-width: 640px) {
  .t-bubble { max-width: 84%; }
}