@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
  --bg: #faf7f2;
  --card: #ffffff;
  --card-alt: #f5f0e8;
  --accent: #d63031;
  --accent2: #e17055;
  --gold: #b8860b;
  --blue: #2d6cdf;
  --green: #27ae60;
  --purple: #6c5ce7;
  --text: #2d3436;
  --text-dim: #888;
  --text-narr: #4a4a4a;
  --border: #e0dbd2;
  --correct-bg: #e8f8f0;
  --correct: #27ae60;
  --wrong-bg: #fde8e8;
  --wrong: #d63031;
  --mild-bg: #fff3e0;
  --mild: #e17055;
  --rule-bg: #f9f6f0;
  --rule-border: #e8e2d6;
  --amanto-bg: #f0ecff;
  --amanto-border: #d5ccff;
  --amanto: #6c5ce7;
  --timemachine-bg: #2d3436;
  --timemachine: #ffeaa7;
}

html[data-theme='dark'] {
  --bg: #181614;
  --card: #24201d;
  --card-alt: #2d2823;
  --accent: #ff6d5d;
  --accent2: #f0b36a;
  --gold: #f1c56c;
  --blue: #88adff;
  --green: #6ad28d;
  --purple: #ab94ff;
  --text: #f5efe8;
  --text-dim: #c4b3a3;
  --text-narr: #e0d4c8;
  --border: #463b34;
  --correct-bg: rgba(106, 210, 141, 0.15);
  --correct: #6ad28d;
  --wrong-bg: rgba(255, 109, 93, 0.15);
  --wrong: #ff8b7c;
  --mild-bg: rgba(240, 179, 106, 0.15);
  --mild: #f0b36a;
  --rule-bg: rgba(255, 255, 255, 0.04);
  --rule-border: rgba(255, 255, 255, 0.08);
  --amanto-bg: rgba(171, 148, 255, 0.15);
  --amanto-border: rgba(171, 148, 255, 0.28);
  --amanto: #ab94ff;
  --timemachine-bg: #201a16;
  --timemachine: #ffeaa7;
}

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

body {
  font-family: 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.8;
}

.header {
  text-align: center;
  padding: 28px 20px 8px;
  border-bottom: 2px solid var(--accent);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: 2px;
}

.header .sub {
  color: var(--text-dim);
  font-size: 0.78rem;
  margin-top: 2px;
}

.mode-sw {
  display: flex;
  justify-content: center;
  gap: 0;
  margin: 12px auto;
  border: 2px solid var(--accent);
  border-radius: 8px;
  width: fit-content;
  overflow: hidden;
}

.mode-b {
  padding: 8px 24px;
  border: none;
  background: var(--card);
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}

.mode-b + .mode-b {
  border-left: 2px solid var(--accent);
}

.mode-b.active {
  background: var(--accent);
  color: #fff;
}

.ch-nav {
  display: flex;
  gap: 0;
  padding: 0 16px;
  margin-bottom: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  border-bottom: 1px solid var(--border);
}

.ch-nav::-webkit-scrollbar {
  display: none;
}

.ch-chip {
  flex-shrink: 0;
  padding: 8px 14px;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--text-dim);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  border-left: 0;
  border-right: 0;
  border-top: 0;
}

.ch-chip:hover {
  color: var(--text);
}

.ch-chip.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.ch-chip.done {
  color: var(--green);
}

.content {
  padding: 0 16px 160px;
  max-width: 680px;
  margin: 0 auto;
}

.scene-richtext p + p,
.scene-richtext ul + p,
.scene-richtext p + ul,
.scene-richtext blockquote + p {
  margin-top: 8px;
}

.scene-richtext ul {
  margin: 8px 0 0 18px;
  color: var(--text-narr);
}

.scene-quote {
  margin: 8px 0;
  padding: 10px 12px;
  background: var(--rule-bg);
  border-left: 3px solid var(--rule-border);
  border-radius: 8px;
}

.panel { display: none; }
.panel.active { display: block; }
.chapter { display: none; }
.chapter.active { display: block; }

.scene-top {
  margin: 16px 0;
  padding: 20px;
  background: var(--card);
  border: 2px solid var(--accent);
  border-radius: 12px;
}

.scene-top .ch-label {
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
}

.scene-top h2 {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text);
  margin: 4px 0 8px;
}

.scene-top p {
  font-size: 0.84rem;
  color: var(--text-narr);
}

.narr {
  margin: 16px 0;
  font-size: 0.88rem;
  color: var(--text-narr);
}

.narr strong { color: var(--text); }

.dialogue {
  margin: 10px 0;
  padding: 10px 14px;
  background: var(--card);
  border-radius: 12px;
  border-left: 4px solid var(--border);
  font-size: 0.85rem;
}

.dialogue .speaker {
  font-size: 0.7rem;
  font-weight: 900;
  margin-bottom: 1px;
}

.dialogue.gin { border-left-color: #b0b0b8; }
.dialogue.gin .speaker { color: #888; }
.dialogue.hijikata { border-left-color: var(--blue); }
.dialogue.hijikata .speaker { color: var(--blue); }
.dialogue.kagura { border-left-color: var(--accent2); }
.dialogue.kagura .speaker { color: var(--accent2); }
.dialogue.shinpachi { border-left-color: var(--green); }
.dialogue.shinpachi .speaker { color: var(--green); }

.rule-note {
  margin: 10px 0;
  padding: 10px 14px;
  background: var(--rule-bg);
  border: 1px solid var(--rule-border);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.rule-note strong { color: var(--gold); }

.rule-note .rlabel {
  font-size: 0.6rem;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--text-dim);
  opacity: 0.6;
  margin-bottom: 2px;
}

.amanto-toggle {
  margin: 6px 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 14px;
  border: 1px dashed var(--amanto-border);
  background: transparent;
  color: var(--amanto);
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}

.amanto-toggle:hover { background: var(--amanto-bg); }

.amanto-body {
  display: none;
  margin: 4px 0 10px;
  padding: 10px 14px;
  background: var(--amanto-bg);
  border: 1px solid var(--amanto-border);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--text-narr);
  animation: fadeUp 0.2s;
}

.amanto-body.show { display: block; }
.amanto-body strong { color: var(--amanto); }

.choice-box {
  margin: 14px 0;
  padding: 14px;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 12px;
}

.choice-box .choice-prompt {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.choice-opt {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  margin: 4px 0;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.83rem;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}

.choice-opt:hover:not(.chosen):not(.locked) {
  border-color: var(--accent);
  background: #fff;
}

.choice-opt.right {
  border-color: var(--correct);
  background: var(--correct-bg);
  color: var(--correct);
}

.choice-opt.wrong-mild {
  border-color: var(--mild);
  background: var(--mild-bg);
  color: var(--mild);
}

.choice-opt.wrong-bad {
  border-color: var(--wrong);
  background: var(--wrong-bg);
  color: var(--wrong);
}

.choice-opt.chosen,
.choice-opt.locked {
  cursor: default;
}

.choice-opt.dim { opacity: 0.3; }

.consequence {
  display: none;
  margin: 8px 0;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.83rem;
  animation: fadeUp 0.3s;
}

.consequence.show { display: block; }

.consequence.good {
  background: var(--correct-bg);
  border: 1px solid #b8e6cc;
  color: var(--green);
}

.consequence.mild {
  background: var(--mild-bg);
  border: 1px solid #f0c9a0;
  color: var(--accent2);
}

.consequence.severe {
  background: var(--wrong-bg);
  border: 1px solid #f0a0a0;
  color: var(--wrong);
}

.consequence .csq-title {
  font-weight: 900;
  margin-bottom: 4px;
}

.consequence .csq-rule {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dashed var(--border);
}

.punishment-bar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--mild);
  color: #fff;
  padding: 12px 20px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  z-index: 150;
  animation: slideDown 0.3s;
}

.punishment-bar.show { display: block; }

.selftest {
  margin: 12px 0;
  padding: 12px 14px;
  background: var(--card);
  border: 1.5px dashed var(--border);
  border-radius: 10px;
}

.selftest .st-q {
  font-size: 0.83rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.selftest .st-a {
  padding: 8px 12px;
  border-radius: 6px;
  user-select: none;
  transition: all 0.2s;
  font-size: 0.82rem;
}

.selftest .st-a.visible {
  background: var(--correct-bg);
  color: var(--correct);
  border: 1px solid #b8e6cc;
}

.score-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--card);
  border-top: 2px solid var(--accent);
  padding: 7px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.75rem;
  font-weight: 700;
  z-index: 100;
  flex-wrap: wrap;
  box-shadow: 0 -10px 24px rgba(45, 52, 54, 0.08);
}

.score-bar .pts { font-weight: 900; }
.score-bar .pts.danger { color: var(--wrong); }
.score-bar .pts.ok { color: var(--correct); }
.score-bar .score-item {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.score-bar.flash {
  animation: scoreFlash 0.45s ease;
}

.mechanic-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(45, 52, 54, 0.88);
  z-index: 220;
  justify-content: center;
  align-items: center;
  padding: 18px;
}

.mechanic-overlay.show { display: flex; }
.mechanic-overlay[hidden] { display: none !important; }

.mechanic-card {
  width: min(760px, 100%);
  max-height: min(88vh, 920px);
  overflow: auto;
  background: var(--card);
  border-radius: 18px;
  border: 2px solid var(--accent);
  padding: 20px;
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.24);
}

.mech-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.mech-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--rule-bg);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 1px;
}

.mech-close {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 999px;
  padding: 6px 10px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.mechanic-card h3 {
  font-size: 1.06rem;
  font-weight: 900;
  color: var(--text);
  margin: 2px 0 8px;
}

.mechanic-card .mech-copy {
  font-size: 0.84rem;
  color: var(--text-narr);
  margin-bottom: 14px;
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
}

.practice-card {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card-alt);
}

.practice-card .pc-tag {
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 6px;
}

.practice-card .pc-q {
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.practice-opt {
  display: block;
  width: 100%;
  text-align: left;
  padding: 9px 11px;
  margin: 4px 0;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-family: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}

.practice-opt:hover:not(.done) { border-color: var(--accent); }
.practice-opt.done { cursor: default; opacity: 0.92; }
.practice-opt.right { border-color: var(--correct); background: var(--correct-bg); color: var(--correct); }
.practice-opt.wrong { border-color: var(--wrong); background: var(--wrong-bg); color: var(--wrong); }

.practice-feedback {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
  font-size: 0.76rem;
  color: var(--text-dim);
}

.scene-source-box {
  margin-top: 10px;
  padding: 12px 14px;
  background: var(--rule-bg);
  border: 1px solid var(--rule-border);
  border-radius: 10px;
  font-size: 0.82rem;
  color: var(--text-narr);
}

.mech-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-top: 14px;
}

.mech-btn,
.dbg-btn {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 9px 14px;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
}

.mech-btn.secondary,
.dbg-btn.secondary {
  background: var(--card);
  color: var(--accent);
  border-color: var(--border);
}

.scene-div {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 22px 0;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}

@keyframes scoreFlash {
  0% { transform: translateY(0); box-shadow: 0 -10px 24px rgba(45, 52, 54, 0.08); }
  30% { transform: translateY(-2px); box-shadow: 0 -16px 28px rgba(214, 48, 49, 0.22); }
  100% { transform: translateY(0); box-shadow: 0 -10px 24px rgba(45, 52, 54, 0.08); }
}

@keyframes scoreFlash {
  0% { transform: translateY(0); box-shadow: 0 -10px 24px rgba(45, 52, 54, 0.08); }
  30% { transform: translateY(-2px); box-shadow: 0 -16px 28px rgba(214, 48, 49, 0.22); }
  100% { transform: translateY(0); box-shadow: 0 -10px 24px rgba(45, 52, 54, 0.08); }
}

@media (max-width: 720px) {
  .content { padding-bottom: 220px; }
  .score-bar { gap: 10px; font-size: 0.7rem; }
  .mode-b { padding: 8px 14px; }
}