:root {
  color-scheme: light;
  --paper: #fbf6ea;
  --paper-deep: #f1e2c8;
  --ink: #30251b;
  --muted: #7b6547;
  --line: #d8c29d;
  --accent: #8f2f1f;
  --accent-dark: #5c2017;
  --good: #17633a;
  --bad: #9f1d1d;
  --shadow: 0 24px 60px rgba(77, 52, 24, 0.14);
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", SimSun, serif;
  text-autospace: normal;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { background: var(--paper); }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(143, 47, 31, 0.10), transparent 30rem),
    linear-gradient(135deg, #fffaf1, var(--paper));
  font-family: var(--sans);
  line-height: 1.7;
}

button, textarea { font: inherit; }

a { color: var(--accent-dark); }

a:hover { color: var(--accent); }

.page-shell {
  width: min(68rem, calc(100% - 2rem));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.site-header,
.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  padding: 1.25rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-header { justify-content: flex-end; }

.language-switcher {
  display: inline-flex;
  gap: 0.2rem;
  padding: 0.2rem;
  background: rgba(255, 250, 241, 0.75);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.language-button {
  min-height: 2rem;
  padding: 0.3rem 0.7rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.language-button[aria-pressed="true"] {
  background: var(--ink);
  color: #fff8e8;
  font-weight: 700;
}

.language-button:focus-visible {
  outline: 3px solid rgba(143, 47, 31, 0.38);
  outline-offset: 3px;
}

.site-footer { margin-top: auto; justify-content: center; }

.text-link,
.site-footer a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

.quiz-app { flex: 1; display: grid; place-items: center; }

.view { width: 100%; }

.hero-view {
  display: grid;
  grid-template-columns: minmax(10rem, 0.8fr) minmax(18rem, 1.2fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  padding: 2rem 0 4rem;
}

.hero-title-block {
  display: grid;
  justify-items: center;
  gap: 1rem;
}

.eyebrow,
.topic-label {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.vertical-title {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 1.65;
  letter-spacing: 0.14em;
  text-shadow: 0 1px 0 #fff;
}

.paper-card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.35rem, 4vw, 2.5rem);
  background: rgba(255, 253, 247, 0.92);
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  box-shadow: var(--shadow);
}

.paper-card::before {
  content: "";
  position: absolute;
  inset: 0.75rem;
  border: 1px solid rgba(216, 194, 157, 0.58);
  border-radius: 0.95rem;
  pointer-events: none;
}

.paper-card > * { position: relative; }

.intro-card h2,
.question-card h2,
.result-card h2 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.35;
}

.intro-card h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); }
.question-card h2 { font-size: clamp(1.35rem, 3vw, 2rem); }
.result-card h2 { font-size: clamp(2rem, 6vw, 3.4rem); }

.seal {
  float: right;
  display: grid;
  place-items: center;
  width: 3.8rem;
  height: 3.8rem;
  margin: 0 0 1rem 1rem;
  border: 0.18rem solid var(--accent);
  color: var(--accent);
  font-family: var(--serif);
  font-weight: 700;
  border-radius: 0.55rem;
  transform: rotate(-4deg);
}

.primary-button,
.secondary-button,
.choice-button {
  min-height: 2.75rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.primary-button {
  padding: 0.75rem 1.25rem;
  background: var(--ink);
  color: #fff8e8;
  font-weight: 700;
}

.secondary-button {
  padding: 0.75rem 1.25rem;
  background: #fffaf1;
  color: var(--ink);
  border-color: var(--line);
  font-weight: 700;
}

.primary-button:hover,
.secondary-button:hover,
.choice-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 0.7rem 1.4rem rgba(77, 52, 24, 0.12);
}

.primary-button:focus-visible,
.secondary-button:focus-visible,
.choice-button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(143, 47, 31, 0.38);
  outline-offset: 3px;
}

.quiz-view { max-width: 48rem; padding: 1rem 0 4rem; }

.progress-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.7rem;
  color: var(--muted);
  font-weight: 700;
}

.progress-track {
  height: 0.55rem;
  margin-bottom: 1rem;
  overflow: hidden;
  background: var(--paper-deep);
  border-radius: 999px;
}

.progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  border-radius: inherit;
  transition: width 220ms ease;
}

.scenario {
  margin: 1.25rem 0;
  padding: 1rem;
  background: #f8eddc;
  border: 1px solid rgba(216, 194, 157, 0.75);
  border-radius: 0.85rem;
  font-family: var(--serif);
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  line-height: 2;
}

.scenario .bad-break,
.scenario .mark {
  color: var(--accent-dark);
  font-weight: 700;
}

.choice-list { display: grid; gap: 0.75rem; }

.choice-button {
  width: 100%;
  padding: 0.85rem 1rem;
  background: #fffaf1;
  color: var(--ink);
  border-color: var(--line);
  text-align: left;
}

.choice-button[aria-pressed="true"] {
  border-color: var(--accent-dark);
  background: #f7e1cf;
  box-shadow: inset 0 0 0 2px rgba(143, 47, 31, 0.16);
}

.choice-button.correct {
  border-color: var(--good);
  background: #eaf6ee;
}

.choice-button.incorrect {
  border-color: var(--bad);
  background: #fdeaea;
}

.warning { margin: 1rem 0 0; color: var(--bad); font-weight: 700; }

.feedback-card {
  margin-top: 1rem;
  padding: 1.25rem;
  border-radius: 1rem;
  border: 1px solid var(--line);
  background: rgba(255, 250, 241, 0.95);
}

.feedback-card.correct { border-color: rgba(23, 99, 58, 0.45); }
.feedback-card.incorrect { border-color: rgba(159, 29, 29, 0.45); }
.feedback-card h3 { margin: 0 0 0.5rem; }
.feedback-card p { margin: 0.4rem 0; }

.result-view { max-width: 48rem; padding: 1rem 0 4rem; }
.result-card { text-align: center; }
.score-line { font-size: clamp(2rem, 8vw, 4rem); font-weight: 900; line-height: 1; margin: 0.5rem 0 1rem; }

.weakness-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin: 1.4rem 0;
}

.weakness-list span {
  padding: 0.35rem 0.7rem;
  background: #f8eddc;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1.3rem;
}

.result-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.result-links a {
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

.share-text {
  width: 100%;
  min-height: 5.5rem;
  margin-top: 1rem;
  padding: 0.8rem;
  color: var(--ink);
  background: #fffaf1;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  resize: vertical;
}

.noscript-card { margin: 1rem 0; }

@media (max-width: 700px) {
  .page-shell { width: min(100% - 1rem, 42rem); }
  .site-header { justify-content: center; }
  .hero-view { grid-template-columns: 1fr; padding-top: 0.75rem; }
  .vertical-title { writing-mode: horizontal-tb; text-align: center; letter-spacing: 0.08em; }
  .hero-title-block { gap: 0.4rem; }
  .paper-card::before { inset: 0.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}