/* ===== テーマまとめページ共通スタイル ===== */
.theme-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}
.theme-content h1 {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.theme-count {
  color: var(--color-text-light, #777);
  font-size: 0.9rem;
  margin-bottom: 20px;
}
.theme-intro {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 28px;
}
.theme-intro p {
  line-height: 1.85;
  margin-bottom: 12px;
  color: var(--color-text);
}
.theme-intro p:last-child { margin-bottom: 0; }
.theme-intro h2 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin: 6px 0 10px;
}
.theme-intro ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.theme-intro li {
  padding: 5px 0;
  padding-left: 1.2em;
  text-indent: -1.2em;
  line-height: 1.7;
  color: var(--color-text);
}
.theme-intro li::before {
  content: "- ";
  color: var(--color-primary);
}
.theme-group { margin-bottom: 28px; }
.theme-group-title {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--color-border);
}
.theme-empty {
  color: var(--color-text);
  padding: 20px 0;
}
.theme-note {
  font-size: 0.82rem;
  color: var(--color-text-light, #888);
  margin-top: 8px;
  line-height: 1.7;
}
.theme-back {
  display: inline-block;
  margin-top: 12px;
  color: var(--color-accent);
  text-decoration: none;
}
.theme-back:hover { text-decoration: underline; }

/* ===== テーマ一覧（hub）カード ===== */
.theme-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin-bottom: 8px;
}
.theme-card {
  display: block;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.theme-card:hover {
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}
.theme-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}
.theme-card-count {
  font-size: 0.82rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}
.theme-card-lead {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text);
}