.learning-view,
.quiz-view {
  padding-top: 1rem;
}

.lesson-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.2rem;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0;
  color: var(--text-accent);
  background: transparent;
  border: 0;
  font-size: 0.78rem;
  font-weight: 900;
  cursor: pointer;
}

.lesson-progress {
  display: grid;
  width: min(260px, 38vw);
  grid-template-columns: auto minmax(80px, 1fr);
  align-items: center;
  gap: 0.7rem;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 900;
}

.lesson-progress__track {
  height: 5px;
  overflow: hidden;
  background: var(--surface-tinted);
  border-radius: 999px;
}

.lesson-progress__track span,
#progress-bar {
  display: block;
  width: 33%;
  height: 100%;
  background: var(--vermilion);
  border-radius: inherit;
}

.lesson-layout,
.quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 1rem;
}

.lesson-main,
.quiz-card {
  padding: clamp(1.5rem, 4vw, 3.5rem);
  border-radius: 1.65rem;
}

.lesson-labels {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 2.5rem;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.category-badge {
  padding: 0.3rem 0.6rem;
  color: var(--on-brand);
  background: var(--surface-brand);
  border-radius: 0.3rem;
  font-weight: 900;
}

.lesson-main h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 5.8rem);
  font-weight: 600;
  letter-spacing: -0.07em;
  line-height: 1.05;
}

.lesson-main h1 small {
  font-size: 0.32em;
  letter-spacing: 0;
}

.lesson-route {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 2rem 0;
  color: var(--text-accent);
  font-size: 0.72rem;
  font-weight: 900;
}

.lesson-route i {
  display: block;
  width: 34px;
  height: 1px;
  background: var(--line);
}

.lesson-point {
  max-width: 55rem;
  padding: 1.4rem 1.5rem;
  background: var(--surface-page);
  border-left: 3px solid var(--mineral);
  border-radius: 0 0.8rem 0.8rem 0;
}

.lesson-point p:last-child {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 2;
}

.lesson-point strong { color: var(--text-accent); text-decoration: underline; text-decoration-color: rgba(217, 74, 50, 0.42); text-decoration-thickness: 3px; text-underline-offset: 0.25rem; }

.hint-button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1rem;
  padding: 0.5rem 0;
  color: var(--text-accent);
  background: transparent;
  border: 0;
  font-size: 0.76rem;
  font-weight: 900;
  cursor: pointer;
}

.hint-button[aria-expanded="true"] svg { transform: rotate(180deg); }

.chinese-hint {
  max-width: 54rem;
  margin: 0.35rem 0;
  padding: 1rem 1.15rem;
  color: var(--text-muted);
  background: #e5f0ee;
  border-radius: 0.7rem;
  font-size: 0.82rem;
}

.chinese-hint p { margin: 0; }

.lesson-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.lesson-actions > span {
  color: var(--text-muted);
  font-size: 0.67rem;
}

.lesson-aside,
.quiz-aside {
  position: relative;
  overflow: hidden;
  padding: 2rem;
  color: var(--on-brand);
  background: var(--surface-brand-strong);
  border-radius: 1.65rem;
  box-shadow: var(--shadow);
}

.lesson-aside::after {
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 50%;
  box-shadow: 0 0 0 18px rgba(255, 255, 255, 0.025), 0 0 0 36px rgba(255, 255, 255, 0.025);
  content: "";
}

.lesson-aside h2 {
  margin: 0.75rem 0;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.55;
}

.lesson-aside > p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.78rem;
}

.lesson-aside dl {
  margin-top: 2rem;
}

.lesson-aside dl div {
  padding: 0.8rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.lesson-aside dt { font-family: var(--font-display); font-size: 1rem; }
.lesson-aside dd { margin: 0.15rem 0 0; color: rgba(255, 255, 255, 0.55); font-size: 0.68rem; }

.quiz-card h1 {
  max-width: 56rem;
  margin: 0 0 1.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.65rem);
  font-weight: 600;
  line-height: 1.55;
}

.answer-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.answer-button {
  display: grid;
  min-height: 82px;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 1rem;
  color: var(--text-primary);
  background: var(--surface-card);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  text-align: left;
  cursor: pointer;
  transition: border 160ms ease, background 160ms ease, transform 160ms ease;
}

.answer-button:hover:not(:disabled) {
  border-color: var(--mineral);
  transform: translateY(-1px);
}

.answer-button > span:first-child {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--text-accent);
  background: var(--surface-page);
  border-radius: 50%;
  font-family: var(--font-display);
  font-weight: 800;
}

.answer-button.is-correct {
  background: rgba(47, 118, 109, 0.08);
  border-color: var(--mineral);
}

.answer-button.is-correct > span:first-child { color: var(--on-brand); background: var(--mineral); }
.answer-button.is-wrong { background: rgba(217, 74, 50, 0.06); border-color: var(--vermilion); }
.answer-button.is-wrong > span:first-child { color: var(--on-brand); background: var(--vermilion); }
.answer-button:disabled { cursor: default; opacity: 0.62; }
.answer-button.is-correct:disabled,
.answer-button.is-wrong:disabled { opacity: 1; }

.answer-feedback {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  margin-top: 1.2rem;
  padding: 1.1rem;
  background: #e5f0ee;
  border-radius: 0.9rem;
}

.answer-feedback[hidden] { display: none; }

.feedback-icon {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  color: var(--on-brand);
  background: var(--mineral);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 1.3rem;
}

.answer-feedback.is-wrong { background: rgba(217, 74, 50, 0.08); }
.answer-feedback.is-wrong .feedback-icon { background: var(--vermilion); }
.answer-feedback h2 { margin: 0; font-family: var(--font-display); font-size: 1rem; }
.answer-feedback p:not(.eyebrow) { margin: 0.2rem 0 0; color: var(--text-muted); font-size: 0.72rem; }

.quiz-aside {
  min-height: 460px;
}

.quiz-number {
  display: block;
  color: rgba(255, 255, 255, 0.13);
  font-family: var(--font-display);
  font-size: 8rem;
  line-height: 1;
}

.quiz-aside p {
  max-width: 13rem;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.8rem;
}

.mini-route {
  position: absolute;
  right: 2rem;
  bottom: 2.5rem;
  left: 2rem;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.mini-route span {
  width: 10px;
  height: 10px;
  margin-top: -5px;
  background: var(--surface-brand-strong);
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
}

.mini-route span:nth-child(2) { width: 14px; height: 14px; margin-top: -7px; background: var(--vermilion); border-color: var(--on-brand); }

.result-view {
  display: grid;
  min-height: calc(100vh - 130px);
  place-items: center;
}

.result-card {
  position: relative;
  width: min(780px, 100%);
  overflow: hidden;
  padding: clamp(2rem, 7vw, 5rem);
  border-radius: 1.65rem;
  text-align: center;
}

.result-card::before,
.result-card::after {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 5px;
  background: repeating-linear-gradient(0deg, var(--line) 0 5px, transparent 5px 10px);
  content: "";
}

.result-card::before { left: 1rem; }
.result-card::after { right: 1rem; }

.completion-seal {
  width: 168px;
  height: 168px;
  margin: 0 auto 2rem;
  color: var(--vermilion);
  border-style: solid;
  animation: stamp-in 650ms cubic-bezier(0.18, 0.84, 0.28, 1.2) both;
}

.result-card h1 {
  max-width: 34rem;
  margin: 0 auto;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1.35;
}

.result-card > p:not(.eyebrow) {
  max-width: 35rem;
  margin: 1rem auto;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 2rem auto;
  border-block: 1px solid var(--line);
}

.result-stats div {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  border-right: 1px solid var(--line);
}

.result-stats div:last-child { border-right: 0; }
.result-stats strong { font-family: var(--font-display); font-size: 1.5rem; }
.result-stats span { color: var(--text-muted); font-size: 0.67rem; }

.toast {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 50;
  max-width: min(360px, calc(100vw - 3rem));
  padding: 0.8rem 1rem;
  color: var(--on-brand);
  background: var(--surface-brand-strong);
  border-radius: 0.65rem;
  box-shadow: var(--shadow);
  font-size: 0.76rem;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.panel-link-button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.7rem;
  padding: 0.8rem 0;
  color: var(--text-accent);
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  font-weight: 900;
  cursor: pointer;
}

.panel-link-button span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  background: var(--surface-tinted);
  border-radius: 50%;
  transition: transform 160ms ease;
}

.panel-link-button:hover span {
  transform: translateX(3px);
}