/* ========================================
   サエラのAIモデル比較実験室 (saera.ai/lab/)
   v2 — Fable redesign 2026-07-03
   デザイントークンは style.css の :root を参照
   ======================================== */

.lab-body {
  background:
    radial-gradient(ellipse 900px 480px at 85% -80px, rgba(245, 194, 208, 0.28), transparent 70%),
    radial-gradient(ellipse 800px 520px at 8% 60px, rgba(184, 169, 232, 0.22), transparent 70%),
    var(--bg);
  min-height: 100vh;
}

.lab-main {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 20px 48px;
}

/* ---------- ヘッダー ---------- */

.lab-header {
  text-align: center;
  margin-bottom: 40px;
}

.lab-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lavender-deep);
  background: var(--white);
  border: 1px solid rgba(184, 169, 232, 0.45);
  border-radius: 999px;
  padding: 4px 16px;
  box-shadow: 0 2px 10px var(--card-shadow);
  margin-bottom: 16px;
}

.lab-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 4px;
}

.lab-title::after {
  content: "";
  display: block;
  width: 72px;
  height: 4px;
  margin: 14px auto 0;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--lavender), var(--pink));
}

.lab-lead {
  max-width: 560px;
  margin: 16px auto 0;
  color: var(--text-light);
  font-size: 0.98rem;
}

/* ---------- セクション共通カード ---------- */

.lab-section {
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 6px 28px var(--card-shadow);
  padding: 28px 32px;
  margin-bottom: 24px;
}

.lab-section > h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--lavender-deep);
  margin-bottom: 16px;
}

/* ---------- 遊び方 ---------- */

.howto-list {
  list-style: none;
  counter-reset: howto;
  display: grid;
  gap: 10px;
}

.howto-list li {
  counter-increment: howto;
  position: relative;
  padding-left: 42px;
  font-size: 0.95rem;
}

.howto-list li::before {
  content: counter(howto);
  position: absolute;
  left: 0;
  top: 2px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
}

/* ---------- 参加モデルチップ ---------- */

.model-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.model-chips .chip {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--lavender-deep);
  background: var(--pink-light);
  border: 1px solid rgba(245, 194, 208, 0.8);
  border-radius: 999px;
  padding: 6px 16px;
}

/* ---------- ラウンド ---------- */

.lab-round {
  background: transparent;
  box-shadow: none;
  padding: 8px 0 0;
}

.round-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
}

.round-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text);
}

.round-date {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--lavender-deep);
  background: var(--white);
  border: 1px solid rgba(184, 169, 232, 0.45);
  border-radius: 999px;
  padding: 2px 12px;
}

.round-intro {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.odai-list {
  display: grid;
  gap: 24px;
}

/* ---------- お題カード ---------- */

.odai-card {
  position: relative;
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 6px 28px var(--card-shadow);
  padding: 28px 32px;
  overflow: hidden;
}

.odai-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--lavender), var(--pink));
}

.odai-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
}

.odai-prompt {
  background: var(--pink-light);
  border-radius: 14px;
  padding: 16px 18px;
  margin-bottom: 20px;
}

.prompt-chip {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--white);
  background: var(--lavender-deep);
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: 8px;
}

.prompt-text {
  white-space: pre-wrap;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 回答カード ---------- */

.entries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1.5px solid rgba(184, 169, 232, 0.4);
  border-radius: 16px;
  padding: 18px;
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.entry-card:hover {
  border-color: var(--lavender);
  box-shadow: 0 6px 20px var(--card-shadow);
  transform: translateY(-2px);
}

.entry-letter {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(135deg, var(--lavender-dark), var(--lavender-deep));
  margin-bottom: 12px;
  flex-shrink: 0;
}

.entry-text {
  white-space: pre-wrap;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text);
  flex-grow: 1;
  margin-bottom: 14px;
}

.entry-select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--lavender-deep) 50%),
    linear-gradient(135deg, var(--lavender-deep) 50%, transparent 50%);
  background-position: calc(100% - 20px) 55%, calc(100% - 14px) 55%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  border: 1.5px solid rgba(184, 169, 232, 0.55);
  border-radius: 10px;
  padding: 9px 36px 9px 14px;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.entry-select:focus {
  outline: none;
  border-color: var(--lavender-deep);
  box-shadow: 0 0 0 3px rgba(184, 169, 232, 0.25);
}

.entry-select:disabled {
  cursor: default;
  opacity: 0.75;
}

.entry-result {
  margin-top: 10px;
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: 10px;
  padding: 8px 12px;
  text-align: center;
}

.entry-result.correct {
  color: #2e7d45;
  background: #e9f7ee;
  border: 1px solid #bfe6cb;
}

.entry-result.incorrect {
  color: #c0424d;
  background: #fdeef0;
  border: 1px solid #f5c9cf;
}

.entry-result.unanswered {
  color: var(--text-light);
  background: var(--bg);
  border: 1px solid rgba(184, 169, 232, 0.3);
}

/* ---------- 回答ボタン・結果 ---------- */

.odai-submit {
  display: block;
  margin: 0 auto;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--white);
  /* コントラスト 4.5:1 以上を確保（Codex レビュー M3） */
  background: linear-gradient(135deg, var(--lavender-deep), #6a5a92);
  border: none;
  border-radius: 999px;
  padding: 13px 48px;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(123, 107, 164, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.odai-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(123, 107, 164, 0.6);
}

.odai-submit:disabled {
  background: #d9d4e6;
  box-shadow: none;
  cursor: default;
}

.odai-result {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1.5px dashed rgba(184, 169, 232, 0.45);
}

.odai-result:focus {
  outline: none;
}

.odai-score {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--lavender-deep);
  margin-bottom: 18px;
}

/* ---------- サエラの総評 ---------- */

.saera-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.saera-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2.5px solid var(--pink);
  box-shadow: 0 2px 10px var(--card-shadow);
  flex-shrink: 0;
}

.saera-bubble {
  position: relative;
  flex-grow: 1;
  background: var(--pink-light);
  border-radius: 16px;
  padding: 14px 18px;
}

.saera-bubble::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 18px;
  border-style: solid;
  border-width: 6px 10px 6px 0;
  border-color: transparent var(--pink-light) transparent transparent;
}

.saera-note-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--lavender-deep);
  background: var(--white);
  border: 1px solid rgba(184, 169, 232, 0.4);
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: 8px;
}

.odai-comment {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 空・ローディング ---------- */

.lab-loading,
.lab-empty {
  text-align: center;
  color: var(--text-light);
  padding: 32px 0;
}

/* ---------- フッター ---------- */

.lab-footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 8px 20px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.lab-footer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--link-lavender);
  text-decoration: none;
  transition: color 0.2s ease;
}

.lab-footer-link:hover {
  color: var(--text);
}

/* ---------- レスポンシブ ---------- */

@media (max-width: 640px) {
  .lab-main {
    padding: 40px 14px 32px;
  }

  .lab-title {
    font-size: 1.55rem;
  }

  .lab-section,
  .odai-card {
    padding: 22px 18px;
    border-radius: 16px;
  }

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

  .round-heading {
    flex-wrap: wrap;
  }

  .lab-footer {
    flex-direction: column;
    justify-content: center;
  }
}