:root {
  --quiz-bg: #f6f8fb;
  --quiz-surface: #ffffff;
  --quiz-surface-soft: #f8fafc;
  --quiz-text: #172033;
  --quiz-muted: #6b7280;
  --quiz-border: #e5e7eb;
  --quiz-primary: #2563eb;
  --quiz-primary-dark: #1d4ed8;
  --quiz-correct: #16a34a;
  --quiz-correct-bg: #ecfdf3;
  --quiz-wrong: #dc2626;
  --quiz-wrong-bg: #fef2f2;
  --quiz-shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
  --quiz-radius-lg: 24px;
  --quiz-radius-md: 16px;
  --quiz-focus: 0 0 0 4px rgba(37, 99, 235, 0.18);
}

.quiz-page * {
  box-sizing: border-box;
}

.quiz-page {
  width: min(100%, 960px);
  margin-inline: auto;
  padding: 24px 16px 56px;
  color: var(--quiz-text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

.quiz-page button,
.quiz-page a {
  -webkit-tap-highlight-color: transparent;
}

.quiz-hero {
  margin-bottom: 20px;
  text-align: center;
}

.quiz-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
  padding: 6px 12px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--quiz-primary-dark);
  font-size: 13px;
  font-weight: 700;
}

.quiz-title {
  margin: 0;
  font-size: clamp(28px, 6vw, 32px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.quiz-lead {
  max-width: 640px;
  margin: 12px auto 0;
  color: var(--quiz-muted);
  font-size: 15px;
}

.quiz-start-card,
.quiz-card,
.quiz-result-card,
.quiz-noscript {
  overflow: hidden;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: var(--quiz-radius-lg);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--quiz-shadow);
}

.quiz-start-card,
.quiz-result-card,
.quiz-noscript {
  padding: 30px 20px;
  text-align: center;
}

.quiz-start-icon,
.quiz-result-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 74px;
  height: 74px;
  margin-bottom: 14px;
  border-radius: 28px;
  background: linear-gradient(135deg, #fef3c7, #dbeafe);
  font-size: 36px;
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.12);
}

.quiz-start-title,
.quiz-result-title {
  margin: 0;
  font-size: clamp(28px, 7vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.quiz-start-text,
.quiz-result-lead {
  max-width: 560px;
  margin: 10px auto 0;
  color: var(--quiz-muted);
  font-size: 15px;
}

.quiz-start-card .quiz-button {
  margin-top: 22px;
}

.quiz-card-header {
  display: grid;
  gap: 14px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--quiz-border);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.quiz-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.quiz-count {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  color: var(--quiz-muted);
  font-weight: 800;
}

.quiz-count-current {
  color: var(--quiz-text);
  font-size: 24px;
  line-height: 1;
}

.quiz-status-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quiz-status-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--quiz-surface-soft);
  color: var(--quiz-muted);
  font-size: 13px;
  font-weight: 800;
}

.quiz-status-item strong {
  color: var(--quiz-text);
}

.quiz-progress {
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: #e5e7eb;
}

.quiz-progress-bar {
  display: block;
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--quiz-primary), #60a5fa);
  transition: width 0.25s ease;
}

.quiz-card-body {
  padding: 24px 20px 22px;
}

.quiz-question-label {
  margin: 0 0 6px;
  color: var(--quiz-primary-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.quiz-question {
  margin: 0;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.03em;
}

.quiz-flag-stage {
  display: grid;
  gap: 14px;
  margin-top: 20px;
  padding: 18px;
  border: 1px solid rgba(226, 232, 240, 0.92);
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.08), transparent 42%),
    var(--quiz-surface-soft);
}

.quiz-flag-frame {
  position: relative;
  overflow: hidden;
  display: block;
  width: min(100%, 520px);
  margin-inline: auto;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--quiz-border);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.12);
}

.quiz-flag-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #ffffff;
}

.quiz-flag-caption {
  margin: 0;
  color: var(--quiz-muted);
  text-align: center;
  font-size: 13px;
  font-weight: 800;
}

.quiz-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.quiz-choice {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-height: 64px;
  padding: 14px 16px;
  border: 2px solid transparent;
  border-radius: var(--quiz-radius-md);
  background: #ffffff;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease, background 0.18s ease;
}

.quiz-choice:hover {
  transform: translateY(-3px);
  border-color: rgba(37, 99, 235, 0.34);
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.13);
}

.quiz-choice:focus-visible {
  outline: none;
  box-shadow: var(--quiz-focus), 0 18px 32px rgba(15, 23, 42, 0.13);
}

.quiz-choice:disabled {
  pointer-events: none;
}

.quiz-choice-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: clamp(16px, 4vw, 20px);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.quiz-choice-badge {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--quiz-surface-soft);
  color: var(--quiz-muted);
  font-size: 13px;
  font-weight: 900;
}

.quiz-card.is-answered .quiz-choice:not(.is-correct):not(.is-selected) {
  opacity: 0.38;
}

.quiz-choice.is-correct {
  border-color: var(--quiz-correct);
  background: var(--quiz-correct-bg);
}

.quiz-choice.is-wrong,
.quiz-choice.is-selected.is-wrong {
  border-color: var(--quiz-wrong);
  background: var(--quiz-wrong-bg);
}

.quiz-choice.is-correct .quiz-choice-badge {
  background: var(--quiz-correct);
  color: #ffffff;
}

.quiz-choice.is-wrong .quiz-choice-badge {
  background: var(--quiz-wrong);
  color: #ffffff;
}

.quiz-choice.is-correct::after,
.quiz-choice.is-wrong::after {
  position: absolute;
  top: 50%;
  right: 58px;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: 999px;
  color: #ffffff;
  font-size: 14px;
  font-weight: 900;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.2);
}

.quiz-choice.is-correct::after {
  content: "✓";
  background: var(--quiz-correct);
}

.quiz-choice.is-wrong::after {
  content: "×";
  background: var(--quiz-wrong);
}

.quiz-feedback {
  margin-top: 20px;
  padding: 16px;
  border-radius: var(--quiz-radius-md);
  border: 1px solid var(--quiz-border);
  background: var(--quiz-surface-soft);
}

.quiz-feedback.is-correct {
  border-color: rgba(22, 163, 74, 0.24);
  background: var(--quiz-correct-bg);
}

.quiz-feedback.is-wrong {
  border-color: rgba(220, 38, 38, 0.22);
  background: var(--quiz-wrong-bg);
}

.quiz-feedback-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.quiz-feedback-text {
  margin: 0;
  color: var(--quiz-muted);
  font-size: 14px;
}

.quiz-feedback-actions,
.quiz-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.quiz-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--quiz-primary);
  color: #ffffff;
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.quiz-button:hover {
  transform: translateY(-2px);
  background: var(--quiz-primary-dark);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.24);
}

.quiz-button:focus-visible {
  outline: none;
  box-shadow: var(--quiz-focus);
}

.quiz-button-secondary {
  border-color: var(--quiz-border);
  background: #ffffff;
  color: var(--quiz-text);
}

.quiz-button-secondary:hover {
  background: var(--quiz-surface-soft);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.quiz-score-main {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  margin-top: 18px;
  color: var(--quiz-text);
  font-weight: 900;
}

.quiz-score-main-number {
  font-size: clamp(56px, 18vw, 92px);
  line-height: 1;
  letter-spacing: -0.08em;
}

.quiz-score-main-unit {
  color: var(--quiz-muted);
  font-size: 22px;
}

.quiz-result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 620px;
  margin: 22px auto 0;
}

.quiz-result-stat {
  padding: 14px 10px;
  border: 1px solid var(--quiz-border);
  border-radius: var(--quiz-radius-md);
  background: var(--quiz-surface-soft);
}

.quiz-result-stat-label {
  display: block;
  color: var(--quiz-muted);
  font-size: 12px;
  font-weight: 800;
}

.quiz-result-stat-value {
  display: block;
  margin-top: 3px;
  font-size: 20px;
  font-weight: 900;
}

.quiz-result-rank {
  max-width: 620px;
  margin: 16px auto 0;
  padding: 16px;
  border: 1px solid rgba(245, 158, 11, 0.32);
  border-radius: var(--quiz-radius-md);
  background: #fffbeb;
  text-align: left;
}

.quiz-result-rank-title {
  margin: 0;
  font-size: 16px;
  font-weight: 900;
}

.quiz-result-rank-text {
  margin: 4px 0 0;
  color: var(--quiz-muted);
  font-size: 14px;
}

.quiz-result-actions {
  justify-content: center;
  margin-top: 22px;
}

.quiz-hidden {
  display: none !important;
}

@media (max-width: 640px) {
  .quiz-page {
    padding: 18px 12px 40px;
  }

  .quiz-card-header,
  .quiz-card-body,
  .quiz-start-card,
  .quiz-result-card,
  .quiz-noscript {
    padding-inline: 14px;
  }

  .quiz-flag-stage {
    padding: 12px;
    border-radius: 18px;
  }

  .quiz-flag-frame {
    border-radius: 14px;
  }

  .quiz-choice-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .quiz-choice {
    min-height: 58px;
    padding: 12px 14px;
    border-radius: 14px;
  }

  .quiz-choice.is-correct::after,
  .quiz-choice.is-wrong::after {
    right: 54px;
  }

  .quiz-feedback-actions,
  .quiz-result-actions {
    display: grid;
  }

  .quiz-button {
    width: 100%;
  }

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