:root {
  color-scheme: light;
  --background: #ffffff;
  --surface: #f7f7f7;
  --text: #171717;
  --muted: #666666;
  --border: #d8d8d8;
  --accent: #1457c8;
  --accent-dark: #0e429d;
  --accent-light: #eef4ff;
  --danger: #b42318;
  --correct: #18753b;
  --correct-light: #eef8f1;
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-size: 16px;
  line-height: 1.55;
}

button,
input {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.6rem 0.8rem;
  color: #ffffff;
  background: var(--text);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-main {
  width: min(100% - 2rem, 1200px);
  min-height: 100vh;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) 0;
}

.site-main:focus {
  outline: none;
}

.loading-panel,
.error-panel,
.noscript {
  max-width: 640px;
  padding: 1rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

.noscript {
  margin: 2rem auto;
}

.display-title {
  max-width: 800px;
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}

.display-title em {
  color: var(--accent);
  font-style: normal;
}

.lede {
  max-width: 680px;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.intro-actions {
  margin-top: 2rem;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  background: #ffffff;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  border-color: #aaaaaa;
  background: var(--surface);
}

.button:focus-visible,
.answer-radio:focus-visible + .answer-body {
  outline: 3px solid #8eb4f5;
  outline-offset: 2px;
}

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

.button--primary:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.quiz-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.quiz-header h1 {
  margin: 0;
  font-size: 1.35rem;
}

.progress-copy {
  color: var(--muted);
  font-size: 0.85rem;
  text-align: right;
}

.progress-copy strong {
  display: block;
  color: var(--text);
}

.progress-track {
  grid-column: 1 / -1;
  height: 4px;
  overflow: hidden;
  background: #e8e8e8;
}

.progress-track span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.prompt-panel {
  margin-bottom: 1.25rem;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--accent);
  background: var(--surface);
  font-size: 1.1rem;
  font-weight: 600;
}

.prompt-panel p {
  margin: 0;
}

.answer-fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.answers-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.answer-card {
  position: relative;
  display: block;
  margin: 0;
  cursor: pointer;
}

.answer-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.answer-body {
  height: 100%;
  display: block;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: #ffffff;
}

.answer-card:hover .answer-body {
  border-color: var(--accent);
}

.answer-radio:checked + .answer-body {
  border-color: var(--accent);
  background: var(--accent-light);
}

.answer-label-row {
  min-height: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.answer-letter {
  width: 1.8rem;
  height: 1.8rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
}

.answer-text {
  margin: 0;
  font-size: 0.95rem;
}

.review-card {
  cursor: default;
}

.review-card--correct .answer-body {
  border-color: var(--correct);
  background: var(--correct-light);
}

.review-card--picked:not(.review-card--correct) .answer-body {
  border-color: var(--accent);
  background: var(--accent-light);
}

.review-page__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.review-page__header h1 {
  margin: 0;
  font-size: 2rem;
}

.review-question {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.review-question__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.review-question__heading h2,
.review-question__heading p {
  margin: 0;
}

.review-question__heading h2 {
  font-size: 1.25rem;
}

.review-question__heading p {
  color: var(--muted);
  font-size: 0.85rem;
}

.review-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.badge {
  padding: 0.2rem 0.45rem;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 700;
}

.badge--picked {
  color: var(--accent-dark);
  background: #dce9ff;
}

.badge--correct {
  color: var(--correct);
  background: #dcefe2;
}

.detector-panel {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
}

.detector-score {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 0;
}

.evidence-list {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.evidence-list li + li {
  margin-top: 0.45rem;
}

.evidence-list mark {
  color: inherit;
  background: #fff1b8;
}

.score-route {
  max-width: 720px;
  display: grid;
  place-items: center;
}

.score-route__panel {
  width: 100%;
  padding: 2rem;
  border: 1px solid var(--border);
  text-align: center;
}

.score-route__number {
  margin: 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.1em;
  font-size: clamp(4rem, 15vw, 8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.score-route__number span {
  color: var(--muted);
  font-size: 0.28em;
  letter-spacing: 0;
}

.score-route__message {
  max-width: 580px;
  margin: 1rem auto 0;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: 1.15;
}

.score-route__message--low {
  color: var(--danger);
}

.score-route__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 850px) {
  .answers-grid {
    grid-template-columns: 1fr;
  }

  .review-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-main {
    width: min(100% - 1.25rem, 1200px);
    padding-block: 1.5rem;
  }

  .display-title {
    font-size: 2.7rem;
  }

  .lede {
    font-size: 1.05rem;
  }

  .score-route__panel {
    padding: 1.25rem;
  }

  .review-page__header,
  .review-question__heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}