:root {
  color-scheme: light;
  --bg: #f4efe6;
  --bg-accent: #e3d4bc;
  --card: rgba(255, 252, 246, 0.92);
  --line: rgba(93, 68, 38, 0.16);
  --text: #2f2418;
  --muted: #6b5a47;
  --primary: #245c4c;
  --primary-strong: #173c32;
  --good: #1f7a46;
  --good-bg: #edf9f0;
  --bad: #a2352f;
  --bad-bg: #fff0ee;
  --shadow: 0 22px 60px rgba(72, 50, 24, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 28%),
    linear-gradient(160deg, var(--bg) 0%, #efe5d6 45%, var(--bg-accent) 100%);
}

button,
input,
label {
  font: inherit;
}

.app-shell {
  width: min(960px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.hero-card,
.question-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-card {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--muted);
}

h1 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 0.98;
}

.hero-copy {
  max-width: 60ch;
  margin: 18px 0 0;
  font-size: 1.04rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-actions,
.action-row,
.question-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: 24px;
}

.primary-btn,
.secondary-btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
  transition: transform 0.16s ease, opacity 0.16s ease, background-color 0.16s ease;
}

.primary-btn {
  background: var(--primary);
  color: #fff;
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:disabled,
.secondary-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

.secondary-btn {
  background: rgba(36, 92, 76, 0.08);
  color: var(--primary-strong);
}

.status-pill,
.meta-chip {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(36, 92, 76, 0.08);
  color: var(--primary-strong);
}

.meta-chip-muted {
  background: rgba(107, 90, 71, 0.08);
  color: var(--muted);
}

.question-card {
  margin-top: 20px;
  padding: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.stat-card {
  min-height: 142px;
  padding: 18px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 251, 245, 0.86);
  box-shadow: var(--shadow);
}

.stat-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-value {
  display: block;
  margin-top: 16px;
  font-size: clamp(1.7rem, 2.4vw, 2.5rem);
  line-height: 1.02;
}

.stat-meta {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.5;
}

.question-text {
  margin-top: 18px;
  font-size: 1.15rem;
  line-height: 1.75;
}

.answers-list {
  margin-top: 22px;
}

.answers-list fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.answers-list legend {
  margin-bottom: 12px;
  font-size: 0.95rem;
  color: var(--muted);
}

#answers-container {
  display: grid;
  gap: 12px;
}

.answer-option {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.7);
}

.answer-option input {
  margin-top: 0.32rem;
}

.answer-option.correct {
  border-color: rgba(31, 122, 70, 0.35);
  background: var(--good-bg);
}

.answer-option.incorrect {
  border-color: rgba(162, 53, 47, 0.35);
  background: var(--bad-bg);
}

.answer-letter {
  display: inline-block;
  min-width: 28px;
  font-weight: 700;
  color: var(--primary-strong);
}

.answer-content {
  min-width: 0;
}

.action-row {
  margin-top: 18px;
}

.result-panel {
  margin-top: 22px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.result-panel.success {
  border-color: rgba(31, 122, 70, 0.28);
  background: var(--good-bg);
}

.result-panel.error {
  border-color: rgba(162, 53, 47, 0.28);
  background: var(--bad-bg);
}

.result-panel h2 {
  margin: 0;
}

.result-summary {
  margin: 10px 0 0;
  font-weight: 700;
}

.result-explanation {
  margin-top: 12px;
  line-height: 1.7;
}

.is-hidden {
  display: none;
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100vw - 20px, 960px);
    padding-top: 20px;
    padding-bottom: 28px;
  }

  .hero-card,
  .question-card {
    border-radius: 22px;
    padding: 18px;
  }

  h1 {
    max-width: none;
  }
}

@media (max-width: 900px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}