:root {
  --ink: #17231f;
  --muted: #5c6864;
  --paper: #f7f5ee;
  --card: #ffffff;
  --lime: #cde77f;
  --green: #173f35;
  --green-soft: #dcebe5;
  --orange: #f29a62;
  --yellow: #f5d866;
  --red-soft: #f8d8d3;
  --red-ink: #8d2b22;
  --line: #d9ddd7;
  --shadow: 0 18px 50px rgba(23, 35, 31, 0.10);
  --radius-xl: 28px;
  --radius-lg: 18px;
  --radius-md: 13px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 0% 0%, rgba(205, 231, 127, .55), transparent 32rem),
    radial-gradient(circle at 100% 12%, rgba(242, 154, 98, .34), transparent 28rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

button, a { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }

.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: white; padding: 10px 14px; z-index: 99;
}
.skip-link:focus { left: 8px; }

.page-shell {
  width: min(840px, calc(100% - 28px));
  margin: 52px auto 0;
}
.card {
  background: rgba(255,255,255,.94);
  border: 1px solid rgba(23,35,31,.08);
  box-shadow: var(--shadow);
  border-radius: var(--radius-xl);
}
.hero-card, .result-card { padding: clamp(28px, 7vw, 66px); text-align: center; }
.hero-card { position: relative; overflow: hidden; }
.hero-card::before,
.hero-card::after {
  content: ""; position: absolute; border-radius: 999px; transform: rotate(-12deg); pointer-events: none;
}
.hero-card::before { width: 180px; height: 22px; background: var(--yellow); right: -42px; top: 38px; }
.hero-card::after { width: 130px; height: 18px; background: var(--orange); left: -42px; bottom: 44px; }
.eyebrow {
  text-transform: uppercase; letter-spacing: .14em; font-size: .79rem; font-weight: 900; color: var(--green);
  margin-bottom: 14px;
}
h1, h2, h3 { margin-top: 0; }
h1 { font-size: clamp(2.35rem, 8vw, 5rem); line-height: .97; letter-spacing: -.055em; margin-bottom: 22px; }
h2 { font-size: clamp(1.55rem, 4.5vw, 2.5rem); line-height: 1.08; letter-spacing: -.035em; }
.lead { font-size: clamp(1.05rem, 2.4vw, 1.28rem); line-height: 1.55; color: #37413d; max-width: 680px; margin: 0 auto 28px; }
.start-meta { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin: 0 0 30px; }
.start-meta span { background: var(--green-soft); border-radius: 999px; padding: 7px 11px; font-size: .86rem; font-weight: 700; }
.microcopy { color: var(--muted); font-size: .82rem; margin: 14px 0 0; }

.primary-btn, .secondary-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 22px; border-radius: 999px;
  font-weight: 800; text-decoration: none; border: 2px solid transparent;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}
.primary-btn { background: var(--green); color: white; border-color: var(--green); box-shadow: 0 8px 18px rgba(23,63,53,.18); }
.primary-btn:hover, .primary-btn:focus-visible { transform: translateY(-1px); box-shadow: 0 11px 22px rgba(23,63,53,.24); }
.secondary-btn { background: white; color: var(--green); border-color: var(--green); }
.primary-btn:focus-visible, .secondary-btn:focus-visible, .answer-btn:focus-visible { outline: 4px solid rgba(23,63,53,.22); outline-offset: 3px; }

.quiz-card { padding: clamp(22px, 5vw, 42px); }
.quiz-topline { display: flex; justify-content: space-between; gap: 16px; font-size: .88rem; font-weight: 800; color: var(--muted); }
.progress { height: 8px; border-radius: 999px; background: #e8ebe7; overflow: hidden; margin: 12px 0 36px; }
.progress-bar { height: 100%; width: 10%; background: var(--green); border-radius: inherit; transition: width .3s ease; }
.topic-tag { display: inline-block; background: var(--lime); padding: 7px 10px; border-radius: 999px; font-size: .78rem; font-weight: 900; margin-bottom: 14px; }
.question-help { margin-top: -7px; color: var(--muted); font-size: .95rem; }
.answers { display: grid; gap: 12px; margin-top: 26px; }
.answer-btn {
  width: 100%; min-height: 62px; border: 2px solid var(--line); background: #fff;
  border-radius: var(--radius-md); padding: 15px 16px; text-align: left; color: var(--ink);
  display: flex; align-items: flex-start; gap: 12px; font-weight: 720; line-height: 1.35;
  transition: border-color .14s ease, transform .14s ease, background .14s ease;
}
.answer-btn:hover { border-color: #9fa9a4; transform: translateY(-1px); }
.answer-letter {
  flex: 0 0 30px; height: 30px; display: grid; place-items: center; border-radius: 50%;
  background: #eef1ee; font-size: .78rem; font-weight: 900;
}
.answer-btn.selected { border-color: var(--green); background: #f4faf7; }
.answer-btn.selected .answer-letter { background: var(--green); color: #fff; }
.answer-btn.correct { border-color: #4e866f; background: #e5f3eb; }
.answer-btn.wrong { border-color: #c66f65; background: #fbe9e6; }
.answer-btn[disabled] { cursor: default; transform: none; }
.check-btn { margin-top: 18px; }
.feedback-panel {
  margin-top: 26px; padding: 18px; border-radius: var(--radius-lg); display: grid; grid-template-columns: auto 1fr; gap: 14px;
  background: var(--green-soft); border: 1px solid rgba(23,63,53,.12);
}
.feedback-panel.bad { background: var(--red-soft); border-color: rgba(141,43,34,.15); }
.feedback-panel h3 { margin-bottom: 7px; font-size: 1.05rem; }
.feedback-panel p { margin: 0; line-height: 1.5; color: #33403b; }
.feedback-icon {
  width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: white; font-weight: 900;
}
.feedback-panel.bad .feedback-icon { background: var(--red-ink); }
.source-link { display: inline-block; margin-top: 10px; color: var(--green); font-weight: 800; font-size: .9rem; }
.question-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; }
.nav-btn { margin-top: 0; }

.result-badge {
  width: 124px; height: 124px; margin: 0 auto 22px; border-radius: 50%; display: grid; place-items: center;
  background: var(--lime); color: var(--green); font-weight: 950; font-size: 2rem; transform: rotate(-4deg);
  border: 4px solid white; box-shadow: 0 12px 30px rgba(23,35,31,.15);
}
.result-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
.about-strip { margin: 18px auto 0; padding: 14px 18px; color: var(--muted); text-align: center; font-size: .86rem; }
.about-strip p { margin: 0; }

@media (max-width: 600px) {
  .page-shell { margin-top: 20px; width: min(100% - 20px, 840px); }
  .hero-card, .result-card, .quiz-card { border-radius: 22px; }
  .hero-card { padding-top: 42px; padding-bottom: 42px; }
  .quiz-card { padding: 20px 16px 24px; }
  .progress { margin-bottom: 28px; }
  .answer-btn { min-height: 58px; padding: 13px; }
  .hero-card .primary-btn, .result-actions .primary-btn, .result-actions .secondary-btn { width: 100%; }
  .question-nav { flex-direction: column-reverse; }
  .question-nav .nav-btn { width: 100%; }
  .feedback-panel { grid-template-columns: 1fr; }
  .feedback-icon { width: 34px; height: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}

/* Responsive refinements */
@media (min-width: 1200px) {
  .page-shell {
    width: min(960px, calc(100% - 64px));
  }

  .hero-card,
  .result-card {
    padding-left: 76px;
    padding-right: 76px;
  }

  .quiz-card {
    padding: 46px 54px 50px;
  }

  .answers {
    gap: 14px;
  }

  .answer-btn {
    min-height: 66px;
    padding: 16px 18px;
    font-size: 1.02rem;
  }
}

@media (min-width: 1600px) {
  .page-shell {
    width: min(1020px, calc(100% - 96px));
  }

  .page-shell {
    margin-top: 64px;
  }

  .quiz-card {
    padding: 50px 64px 54px;
  }

  .lead {
    max-width: 720px;
  }
}

@media (min-width: 601px) and (max-width: 899px) {
  .page-shell {
    width: min(100% - 36px, 840px);
  }

  .page-shell {
    margin-top: 34px;
  }

  .hero-card,
  .result-card {
    padding-left: 38px;
    padding-right: 38px;
  }

  .quiz-card {
    padding: 30px 28px 34px;
  }

  .question-nav {
    gap: 10px;
  }

  .question-nav .nav-btn {
    flex: 1 1 0;
    min-width: 0;
  }
}

@media (max-width: 720px) {
  .question-nav {
    flex-direction: column-reverse;
  }

  .question-nav .nav-btn {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .page-shell {
    width: calc(100% - 14px);
    margin-top: 10px;
  }

  .hero-card,
  .result-card,
  .quiz-card {
    border-radius: 18px;
  }

  .hero-card {
    padding-left: 18px;
    padding-right: 18px;
  }

  .quiz-card {
    padding: 18px 12px 22px;
  }

  .quiz-topline {
    gap: 8px;
    font-size: .82rem;
  }

  .answer-btn {
    padding: 12px;
    gap: 10px;
    font-size: .96rem;
  }

  .answer-letter {
    flex-basis: 28px;
    width: 28px;
    height: 28px;
  }

  .feedback-panel {
    padding: 15px;
  }

}


/* Accessibility and final polish */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link:focus-visible {
  left: 8px;
  outline: 4px solid rgba(23,63,53,.28);
  outline-offset: 2px;
}

.answer-btn[aria-pressed="true"] {
  border-color: var(--green);
  background: #f4faf7;
}

.answer-btn[aria-pressed="true"] .answer-letter {
  background: var(--green);
  color: #fff;
}

.source-link:focus-visible,

#question-text:focus,
#result-title:focus,
.feedback-panel:focus {
  outline: none;
}

.result-score-text {
  margin: -8px auto 12px;
  color: var(--green);
  font-size: 1.05rem;
  font-weight: 850;
}

@media (forced-colors: active) {
  .answer-btn.selected,
  .answer-btn.correct,
  .answer-btn.wrong,
  .feedback-panel,
  .feedback-panel.bad,
  .topic-tag,
  .result-badge {
    forced-color-adjust: auto;
    border: 2px solid CanvasText;
  }

  .progress-bar {
    background: Highlight;
  }
}

@media (max-width: 360px) {
  .quiz-topline {
    flex-direction: column;
    align-items: flex-start;
  }

  .start-meta {
    flex-direction: column;
    align-items: stretch;
  }

  .start-meta span {
    text-align: center;
  }
}


/* Final design refinement */
body {
  background:
    radial-gradient(circle at 8% 4%, rgba(205, 231, 127, .62), transparent 29rem),
    radial-gradient(circle at 96% 18%, rgba(242, 154, 98, .30), transparent 27rem),
    linear-gradient(180deg, #f9f7f0 0%, var(--paper) 100%);
}

.card {
  border-color: rgba(23,35,31,.10);
}

.hero-card {
  isolation: isolate;
}

.hero-card::before,
.hero-card::after {
  z-index: -1;
}

.hero-card h1 {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-card .lead {
  max-width: 650px;
}

.start-meta span {
  border: 1px solid rgba(23,63,53,.08);
}

.quiz-card {
  position: relative;
  overflow: hidden;
}

.quiz-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--lime), var(--green));
  opacity: .9;
}

.quiz-topline {
  padding-bottom: 2px;
}

.topic-tag {
  box-shadow: inset 0 0 0 1px rgba(23,63,53,.08);
}

#question-text {
  max-width: 720px;
  margin-bottom: 14px;
}

.answer-btn {
  box-shadow: 0 1px 0 rgba(23,35,31,.035);
}

.answer-btn:hover:not([disabled]) {
  box-shadow: 0 5px 15px rgba(23,35,31,.065);
}

.feedback-panel {
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.35);
}

.question-nav {
  padding-top: 4px;
}

.result-card {
  position: relative;
  overflow: hidden;
}

.result-card::before,
.result-card::after {
  content: "";
  position: absolute;
  pointer-events: none;
  z-index: 0;
  border-radius: 999px;
}

.result-card::before {
  width: 170px;
  height: 20px;
  background: var(--yellow);
  top: 42px;
  left: -48px;
  transform: rotate(-16deg);
}

.result-card::after {
  width: 145px;
  height: 18px;
  background: var(--orange);
  right: -42px;
  bottom: 48px;
  transform: rotate(12deg);
}

.result-card > * {
  position: relative;
  z-index: 1;
}

.result-badge {
  background: linear-gradient(145deg, #d8ee98, var(--lime));
}

.result-card .lead {
  max-width: 640px;
}

.result-actions {
  margin-top: 30px;
}

.about-strip {
  max-width: 760px;
  margin-top: 20px;
  padding: 13px 18px 0;
  line-height: 1.55;
}

@media (min-width: 900px) {
  .hero-card,
  .result-card {
    min-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .quiz-card::before {
    width: 4px;
  }

  .about-strip {
    padding-left: 10px;
    padding-right: 10px;
  }
}

/* Question visuals */
.question-heading-row {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  margin-bottom: 8px;
}

.question-heading-copy {
  min-width: 0;
}

.question-visual {
  width: 82px;
  height: 82px;
  display: grid;
  place-items: center;
  border-radius: 24px;
  font-size: 3rem;
  line-height: 1;
  background:
    radial-gradient(circle at 28% 22%, rgba(255,255,255,.85), transparent 32%),
    linear-gradient(145deg, var(--yellow), var(--orange));
  box-shadow: 0 10px 24px rgba(23,35,31,.10), inset 0 0 0 1px rgba(23,35,31,.05);
  transform: rotate(-2deg);
  user-select: none;
}

.question-heading-row .topic-tag {
  margin-bottom: 12px;
}

.question-heading-row #question-text {
  margin-bottom: 0;
}

.question-enter {
  animation: question-in .28s ease both;
}

@keyframes question-in {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-symbol {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  margin: 0 auto 12px;
  font-size: 3rem;
  line-height: 1;
  filter: drop-shadow(0 7px 12px rgba(23,35,31,.12));
}

@media (max-width: 600px) {
  .question-heading-row {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 14px;
  }

  .question-visual {
    width: 62px;
    height: 62px;
    border-radius: 18px;
    font-size: 2.25rem;
  }
}

@media (max-width: 420px) {
  .question-heading-row {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 11px;
  }

  .question-visual {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    font-size: 2rem;
  }

  .question-heading-row .topic-tag {
    margin-bottom: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .question-enter { animation: none; }
}

/* Question heading without experimental emoji marker */
.question-heading-row { grid-template-columns: minmax(0, 1fr); }