.quiz-page {
  min-height: 100vh;
}

.quiz-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.quiz-header,
.study-card,
.quiz-card {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.quiz-header {
  padding: 22px 26px 26px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.76), rgba(245, 241, 230, 0.9)),
    linear-gradient(90deg, rgba(136, 171, 126, 0.16), rgba(216, 140, 59, 0.1));
}

.back-link,
.article-link {
  color: var(--accent);
  font-weight: 700;
  text-underline-offset: 3px;
}

.quiz-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-top: 28px;
}

.quiz-heading h1,
.study-card h2,
.quiz-card h2,
.question-screen legend {
  margin: 0;
  font-family: "Palatino Linotype", "Book Antiqua", serif;
}

.quiz-heading h1 {
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 0.9;
}

.quiz-subtitle {
  max-width: 650px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.article-link {
  flex: 0 0 auto;
  padding: 11px 14px;
  border: 1px solid rgba(53, 95, 68, 0.24);
  background: rgba(255, 255, 255, 0.54);
}

.quiz-layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  align-items: start;
  gap: 18px;
  margin-top: 18px;
}

.study-card,
.quiz-card {
  padding: 26px;
}

.study-card {
  position: sticky;
  top: 18px;
}

.study-card h2 {
  font-size: 1.5rem;
}

.value-list {
  display: grid;
  gap: 10px;
  margin: 22px 0;
}

.value-list div {
  padding: 12px;
  border-left: 4px solid var(--accent-soft);
  background: rgba(53, 95, 68, 0.07);
}

.value-list dt {
  color: var(--accent);
  font-weight: 800;
}

.value-list dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.core-idea {
  padding: 15px;
  border: 1px solid rgba(216, 140, 59, 0.28);
  background: rgba(216, 140, 59, 0.09);
}

.core-idea p,
.citation {
  color: var(--muted);
  line-height: 1.5;
}

.core-idea p {
  margin: 6px 0 0;
}

.citation {
  margin: 20px 0 0;
  font-size: 0.8rem;
}

.quiz-card {
  min-height: 520px;
}

.quiz-intro,
.results-screen {
  display: grid;
  justify-items: start;
  align-content: center;
  min-height: 466px;
}

.quiz-card h2 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
}

.quiz-intro > p:not(.info-kicker),
.results-screen > p:not(.info-kicker) {
  max-width: 620px;
  color: var(--muted);
  line-height: 1.6;
}

.quiz-details {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 28px;
  padding: 0;
  list-style: none;
}

.quiz-details li {
  padding: 9px 12px;
  background: rgba(53, 95, 68, 0.08);
  color: var(--muted);
}

.primary-button,
.secondary-button {
  min-height: 46px;
  padding: 11px 18px;
  border: 1px solid var(--accent);
  cursor: pointer;
  font-weight: 800;
}

.primary-button {
  background: var(--accent);
  color: #fffdf6;
}

.secondary-button {
  background: transparent;
  color: var(--accent);
}

.primary-button:hover,
.primary-button:focus-visible,
.secondary-button:hover,
.secondary-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 7px 14px rgba(32, 49, 40, 0.14);
}

.primary-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
  box-shadow: none;
}

.progress-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.progress-row p {
  margin: 0 0 8px;
}

.progress-track {
  height: 7px;
  overflow: hidden;
  background: rgba(53, 95, 68, 0.12);
}

.progress-track span {
  display: block;
  width: 10%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  transition: width 220ms ease;
}

.question-screen form {
  margin-top: 34px;
}

.question-screen fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.question-screen legend {
  width: 100%;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.24;
}

.answer-list {
  display: grid;
  gap: 11px;
  margin-top: 26px;
}

.answer-option {
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid rgba(53, 95, 68, 0.18);
  background: rgba(255, 255, 255, 0.48);
  cursor: pointer;
  line-height: 1.45;
}

.answer-option:hover,
.answer-option:focus-within {
  border-color: var(--accent-soft);
  background: rgba(139, 171, 126, 0.1);
}

.answer-option:has(input:checked) {
  border-color: var(--accent);
  box-shadow: inset 4px 0 0 var(--accent);
}

.answer-option.is-correct {
  border-color: #397448;
  background: rgba(57, 116, 72, 0.12);
  box-shadow: inset 4px 0 0 #397448;
}

.answer-option.is-incorrect {
  border-color: #a14d39;
  background: rgba(161, 77, 57, 0.1);
  box-shadow: inset 4px 0 0 #a14d39;
}

.answer-option input {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
}

.answer-letter {
  color: var(--accent);
  font-weight: 900;
}

.feedback {
  margin-top: 18px;
  padding: 15px 17px;
  border-left: 4px solid var(--accent);
  background: rgba(53, 95, 68, 0.08);
  color: var(--muted);
  line-height: 1.55;
}

.feedback.is-incorrect {
  border-left-color: #a14d39;
  background: rgba(161, 77, 57, 0.08);
}

.feedback strong {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
}

.question-actions,
.result-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.score-ring {
  display: grid;
  place-items: center;
  width: 128px;
  height: 128px;
  margin: 14px 0 22px;
  border: 10px solid var(--accent-soft);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.48);
  color: var(--accent);
  font-family: "Palatino Linotype", "Book Antiqua", serif;
  font-size: 2rem;
  font-weight: 800;
}

.answer-review {
  width: 100%;
  margin-top: 30px;
  border-top: 1px solid var(--border);
}

.review-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.review-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  line-height: 1.4;
}

.review-item p {
  margin: 4px 0;
  color: var(--muted);
  line-height: 1.45;
}

.review-status {
  color: #397448;
  font-weight: 800;
}

.review-status.is-incorrect {
  color: #a14d39;
}

[hidden] {
  display: none !important;
}

@media (max-width: 800px) {
  .quiz-shell {
    width: min(100% - 20px, 680px);
    padding-top: 10px;
  }

  .quiz-header,
  .study-card,
  .quiz-card {
    padding: 20px;
  }

  .quiz-heading {
    display: block;
    margin-top: 24px;
  }

  .article-link {
    display: inline-block;
    margin-top: 20px;
  }

  .quiz-layout {
    grid-template-columns: 1fr;
  }

  .study-card {
    position: static;
  }

  .value-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .quiz-card,
  .quiz-intro,
  .results-screen {
    min-height: 0;
  }
}

@media (max-width: 560px) {
  .quiz-shell {
    width: 100%;
    padding: 0;
  }

  .quiz-header,
  .study-card,
  .quiz-card {
    border-width: 0 0 1px;
    box-shadow: none;
  }

  .quiz-layout {
    gap: 0;
    margin: 0;
  }

  .value-list {
    grid-template-columns: 1fr;
  }

  .study-card {
    order: 2;
  }

  .quiz-intro,
  .results-screen {
    padding: 10px 0;
  }

  .question-screen form {
    margin-top: 24px;
  }

  .answer-option {
    padding: 12px;
  }
}