:root {
  --quiz-correct: #2d8a4e;
  --quiz-correct-bg: #e8f5ed;
  --quiz-wrong: #d94040;
  --quiz-wrong-bg: #fdecec;
  --quiz-card-shadow: 0 16px 28px rgba(26, 26, 26, 0.05);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.quiz-app {
  flex: 1;
  max-width: 58rem;
  padding-top: 4.75rem;
}

.screen {
  display: grid;
  gap: 1.2rem;
}

.quiz-hero {
  margin-bottom: 0;
}

.hero-note {
  max-width: 34rem;
  margin: 0.9rem auto 0;
  color: var(--wa-ink-light);
  font-size: 0.94rem;
}

.screen-heading {
  display: grid;
  gap: 0.35rem;
}

.screen-title {
  font-size: 1.4rem;
  line-height: 1.4;
}

.screen-subtitle {
  color: var(--wa-ink-light);
  font-size: 0.94rem;
}

.mode-cards,
.genre-grid {
  display: grid;
  gap: 0.9rem;
}

.mode-card,
.genre-card,
.difficulty-card,
.choice-btn,
.review-toggle,
.ranking-link,
.btn-secondary,
.back-btn {
  appearance: none;
  font: inherit;
}

.mode-card,
.genre-card,
.difficulty-card,
.question-card,
.input-area,
.answer-detail,
.answer-result,
.result-header,
.ranking-register,
.answer-review,
.ranking-table-wrap {
  background: var(--wa-white);
  border: 1px solid var(--wa-gray-light);
  border-radius: 6px;
  box-shadow: var(--quiz-card-shadow);
}

.mode-card {
  display: grid;
  justify-items: start;
  gap: 0.45rem;
  width: 100%;
  padding: 1.35rem;
  text-align: left;
  background: var(--wa-white);
  border: 1px solid var(--wa-gray-light);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.mode-card:hover:not(:disabled),
.genre-card:hover:not(:disabled),
.difficulty-card:hover:not(:disabled),
.choice-btn:hover:not(:disabled),
.ranking-link:hover,
.btn-secondary:hover,
.review-toggle:hover {
  border-color: var(--wa-orange);
}

.mode-card:hover:not(:disabled),
.genre-card:hover:not(:disabled),
.difficulty-card:hover:not(:disabled) {
  transform: translateY(-2px);
}

.mode-card:disabled,
.genre-card:disabled,
.difficulty-card:disabled,
.choice-btn:disabled,
.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.55;
  cursor: default;
}

.mode-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.mode-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--wa-ink);
}

.mode-desc {
  color: var(--wa-ink-light);
  font-size: 0.9rem;
  line-height: 1.7;
}

.ranking-link,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin: 0 auto;
  padding: 0.8rem 1.6rem;
  color: var(--wa-orange-dark);
  background: var(--wa-white);
  border: 1px solid var(--wa-orange);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.ranking-link:hover,
.btn-secondary:hover {
  background: var(--wa-orange);
  color: var(--wa-white);
}

.back-btn {
  justify-self: start;
  padding: 0.15rem 0;
  background: none;
  border: none;
  color: var(--wa-gray);
  cursor: pointer;
}

.back-btn:hover {
  color: var(--wa-ink);
}

.genre-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.genre-card {
  display: grid;
  justify-items: start;
  gap: 0.25rem;
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--wa-gray-light);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.genre-icon {
  font-size: 1.5rem;
}

.genre-name {
  font-weight: 700;
  font-size: 0.98rem;
}

.genre-count {
  color: var(--wa-gray);
  font-size: 0.82rem;
}

.difficulty-list {
  display: grid;
  gap: 0.8rem;
}

.difficulty-card {
  display: grid;
  gap: 0.5rem;
  width: 100%;
  padding: 1rem 1.1rem;
  border: 1px solid var(--wa-gray-light);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.difficulty-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}

.difficulty-label {
  font-size: 1rem;
  font-weight: 700;
}

.difficulty-count {
  color: var(--wa-orange-dark);
  font-size: 0.9rem;
  font-weight: 700;
}

.difficulty-desc {
  color: var(--wa-ink-light);
  font-size: 0.9rem;
  line-height: 1.7;
}

.quiz-header {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.quiz-progress {
  flex: 1;
}

.quiz-progress > span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--wa-gray);
  font-size: 0.88rem;
  font-weight: 700;
}

.quiz-score {
  min-width: 7.5rem;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  background: var(--wa-orange-pale);
  color: var(--wa-orange-dark);
  font-size: 0.84rem;
  font-weight: 700;
  text-align: center;
}

.question-card {
  padding: 1.1rem 1.15rem 1.2rem;
}

.question-image {
  margin-bottom: 1rem;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--wa-gray-light);
  background: var(--wa-bg);
}

.question-image img {
  display: block;
  width: 100%;
  max-height: 22rem;
  object-fit: cover;
}

.question-text {
  font-size: 1.16rem;
  font-weight: 700;
  line-height: 1.8;
}

.choices {
  display: grid;
  gap: 0.8rem;
}

.choice-btn {
  width: 100%;
  padding: 1rem 1.1rem;
  background: var(--wa-white);
  color: var(--wa-ink);
  text-align: left;
  border: 1px solid var(--wa-gray-light);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.choice-btn:hover:not(:disabled) {
  background: var(--wa-orange-pale);
}

.input-area {
  display: grid;
  gap: 0.9rem;
  padding: 1rem 1.1rem 1.2rem;
}

.input-hint {
  color: var(--wa-ink-light);
  font-size: 0.88rem;
}

.input-field {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--wa-gray-light);
  border-radius: 6px;
  font: inherit;
  background: var(--wa-white);
}

.input-field:focus-visible,
.mode-card:focus-visible,
.genre-card:focus-visible,
.difficulty-card:focus-visible,
.choice-btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.ranking-link:focus-visible,
.review-toggle:focus-visible,
.back-btn:focus-visible {
  outline: 2px solid rgba(255, 153, 0, 0.3);
  outline-offset: 2px;
}

.input-field:focus {
  border-color: var(--wa-orange);
}

.answer-result {
  justify-items: center;
  gap: 0.25rem;
  padding: 1.25rem 1rem;
}

.answer-result.is-correct {
  background: var(--quiz-correct-bg);
  border-color: rgba(45, 138, 78, 0.2);
}

.answer-result.is-wrong {
  background: var(--quiz-wrong-bg);
  border-color: rgba(217, 64, 64, 0.2);
}

.result-icon {
  font-size: 3.3rem;
  line-height: 1;
  animation: result-fade-in 0.3s ease;
}

.answer-result.is-correct .result-icon,
.answer-result.is-correct .result-label {
  color: var(--quiz-correct);
}

.answer-result.is-wrong .result-icon,
.answer-result.is-wrong .result-label {
  color: var(--quiz-wrong);
}

.result-label {
  font-size: 1rem;
  font-weight: 700;
}

.answer-detail {
  padding: 1rem 1.1rem;
}

.answer-row + .answer-row {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--wa-gray-light);
}

.answer-key {
  display: block;
  color: var(--wa-gray);
  font-size: 0.8rem;
  margin-bottom: 0.2rem;
}

.answer-value {
  font-size: 0.96rem;
  font-weight: 700;
  line-height: 1.7;
}

.answer-correct {
  color: var(--wa-orange-dark);
}

.explanation-box {
  padding: 1.15rem;
  border-radius: 6px;
  background: var(--wa-orange-pale);
}

.explanation-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--wa-orange-dark);
  letter-spacing: 0.08em;
  margin-bottom: 0.45rem;
}

.explanation-text {
  font-size: 0.94rem;
  line-height: 1.8;
}

.explanation-source {
  margin-top: 0.65rem;
  color: var(--wa-gray);
  font-size: 0.8rem;
}

.result-header {
  padding: 1.35rem 1.25rem;
  text-align: center;
  background: var(--wa-white);
}

.result-mode {
  color: var(--wa-ink-light);
  font-size: 0.95rem;
}

.result-score-display {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 0.25rem;
  margin: 0.45rem 0;
  color: var(--wa-orange-dark);
}

.result-score-num {
  font-size: clamp(3.4rem, 8vw, 5.4rem);
  line-height: 1;
  font-weight: 700;
}

.result-score-sep,
.result-score-total {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1;
  font-weight: 700;
}

.result-score-label {
  color: var(--wa-ink);
  font-weight: 700;
}

.ranking-register,
.answer-review {
  padding: 1rem 1.1rem;
}

.ranking-register-title {
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.ranking-register-form {
  display: grid;
  gap: 0.8rem;
}

.ranking-register-form .btn-primary {
  width: 100%;
}

.ranking-register-result {
  margin-top: 0.75rem;
  color: var(--quiz-correct);
  font-size: 0.9rem;
  font-weight: 700;
}

.review-toggle {
  width: 100%;
  padding: 0.2rem 0;
  background: none;
  border: none;
  color: var(--wa-ink);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.review-list {
  display: grid;
  gap: 0.8rem;
  margin-top: 0.9rem;
}

.review-item {
  padding: 0.9rem 1rem;
  border: 1px solid var(--wa-gray-light);
  border-radius: 6px;
  background: var(--wa-bg);
}

.review-item.review-correct {
  background: var(--quiz-correct-bg);
  border-color: rgba(45, 138, 78, 0.18);
}

.review-item.review-wrong {
  background: var(--quiz-wrong-bg);
  border-color: rgba(217, 64, 64, 0.18);
}

.review-item-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.35rem;
}

.review-number {
  color: var(--wa-gray);
  font-size: 0.82rem;
  font-weight: 700;
}

.review-mark {
  font-size: 1.1rem;
  font-weight: 700;
}

.review-correct .review-mark {
  color: var(--quiz-correct);
}

.review-wrong .review-mark {
  color: var(--quiz-wrong);
}

.review-question {
  font-weight: 700;
  line-height: 1.7;
  margin-bottom: 0.35rem;
}

.review-your-answer,
.review-correct-answer,
.review-explanation {
  color: var(--wa-ink-light);
  font-size: 0.88rem;
}

.review-explanation {
  margin-top: 0.35rem;
}

.share-area,
.result-actions {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 9rem;
  padding: 0.8rem 1.25rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
}

.share-x {
  background: #111111;
  color: var(--wa-white);
}

.ranking-table-wrap {
  overflow: hidden;
  padding: 0;
}

.ranking-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--wa-white);
}

.ranking-table th,
.ranking-table td {
  padding: 0.8rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--wa-gray-light);
}

.ranking-table th {
  font-size: 0.82rem;
  color: var(--wa-gray);
  background: var(--wa-bg);
}

.ranking-table tbody tr:nth-child(odd) {
  background: rgba(255, 243, 224, 0.34);
}

.ranking-table tbody tr:last-child td {
  border-bottom: none;
}

.ranking-row-top1 .ranking-rank {
  color: #bb8a00;
  font-weight: 700;
}

.ranking-row-top2 .ranking-rank {
  color: #7d8794;
  font-weight: 700;
}

.ranking-row-top3 .ranking-rank {
  color: #a25a2c;
  font-weight: 700;
}

.ranking-col-rank,
.ranking-rank,
.ranking-col-score,
.ranking-score {
  width: 5rem;
}

.loadMoreBtn {
  margin-top: 0.25rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.2rem;
  transform: translateX(-50%);
  width: min(28rem, calc(100% - 2rem));
  padding: 0.85rem 1rem;
  border-radius: 6px;
  background: rgba(26, 26, 26, 0.92);
  color: var(--wa-white);
  box-shadow: 0 14px 24px rgba(26, 26, 26, 0.18);
  z-index: 1200;
}

.toast p {
  font-size: 0.9rem;
  line-height: 1.6;
}

@keyframes result-fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 640px) {
  .mode-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .genre-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .quiz-header {
    align-items: center;
  }

  .ranking-register-form {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .ranking-register-form .btn-primary {
    width: auto;
    min-width: 7rem;
  }
}

@media (max-width: 639px) {
  .quiz-app {
    padding-top: 4.25rem;
  }

  .quiz-header {
    flex-direction: column;
  }

  .quiz-score {
    width: 100%;
  }

  .result-actions {
    display: grid;
  }

  .result-actions .btn-primary,
  .result-actions .btn-secondary,
  .share-area .share-btn,
  .ranking-link {
    width: 100%;
  }
}