/* ─────────────────────────────────────────
 * Lvmaai Topic / Column stylesheet
 *
 * Front-end only. Loaded by app/setup.php on
 * topic / column CPT and their taxonomy archives.
 *
 * Colors use --wp--preset--color--primary (runtime injected
 * from theme settings via wp_theme_json_data_theme).
 * ───────────────────────────────────────── */

/* === Topic / Column Archive Grid === */

.lvmaai-topic-archive {
  margin-top: 2rem;
}

.lvmaai-topic-archive--grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.lvmaai-topic-archive--list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lvmaai-topic-archive--list .lvmaai-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.5rem;
}

.lvmaai-topic-archive--list .lvmaai-card__media {
  margin: 0;
  aspect-ratio: 4 / 3;
}


/* === Topic Card === */

.lvmaai-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.lvmaai-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -8px rgba(15, 23, 42, 0.12);
  border-color: var(--wp--preset--color--primary, #1a73e8);
}

.lvmaai-card__media {
  display: block;
  margin: 0 0 1rem;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.04), rgba(15, 23, 42, 0.08));
}

.lvmaai-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.lvmaai-card:hover .lvmaai-card__media img {
  transform: scale(1.04);
}

.lvmaai-card__body {
  padding: 1rem 1.25rem 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.lvmaai-card__kicker {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--wp--preset--color--primary, #1a73e8);
}

.lvmaai-card__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
}

.lvmaai-card__title a {
  color: #0f172a;
  text-decoration: none;
}

.lvmaai-card__title a:hover {
  color: var(--wp--preset--color--primary, #1a73e8);
}

.lvmaai-card__excerpt {
  color: #475569;
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

.lvmaai-card__meta {
  margin: auto 0 0;
  padding-top: 0.75rem;
  color: #64748b;
  font-size: 0.8125rem;
}


/* === Single Topic Hero === */

.lvmaai-single-topic {
  margin-top: 2rem;
}

.lvmaai-single-topic__header {
  text-align: center;
  margin-bottom: 3rem;
}

.lvmaai-single-topic__cover {
  margin: 0 auto 2rem;
  max-width: 960px;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 21 / 9;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.04), rgba(15, 23, 42, 0.08));
}

.lvmaai-single-topic__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lvmaai-single-topic__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.lvmaai-single-topic__subtitle {
  margin: 0 0 1.25rem;
  font-size: 1.125rem;
  color: #64748b;
  font-weight: 400;
}

.lvmaai-single-topic__content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: #1e293b;
}

.lvmaai-single-topic__content p {
  margin: 0 0 1.25rem;
}

.lvmaai-single-topic__tags {
  max-width: 720px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.lvmaai-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.8125rem;
  background: rgba(15, 23, 42, 0.05);
  color: #475569;
  border-radius: 999px;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.lvmaai-tag:hover {
  background: var(--wp--preset--color--primary, #1a73e8);
  color: #fff;
}


/* === Related Posts Grid === */

.lvmaai-related-posts {
  max-width: 960px;
  margin: 4rem auto 0;
  padding-top: 3rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.lvmaai-related-posts__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
  color: #0f172a;
}

.lvmaai-related-posts__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.lvmaai-related-post {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.06);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.lvmaai-related-post:hover {
  border-color: var(--wp--preset--color--primary, #1a73e8);
  transform: translateY(-1px);
}

.lvmaai-related-post__link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.lvmaai-related-post__thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.04);
}

.lvmaai-related-post__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lvmaai-related-post__title {
  margin: 0;
  padding: 0.75rem 1rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  color: #0f172a;
}

.lvmaai-related-post:hover .lvmaai-related-post__title {
  color: var(--wp--preset--color--primary, #1a73e8);
}


/* === Mobile === */

@media (max-width: 640px) {
  .lvmaai-topic-archive--grid {
    grid-template-columns: 1fr;
  }
  .lvmaai-topic-archive--list .lvmaai-card {
    grid-template-columns: 1fr;
  }
  .lvmaai-related-posts__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}


/* === Paywall (阶段 3 付费阅读) === */

.lvmaai-paywall {
  position: relative;
  margin: 3rem auto 0;
  max-width: 640px;
  padding: 2.5rem 2rem;
  text-align: center;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.02), rgba(15, 23, 42, 0.06));
  border: 1px dashed rgba(15, 23, 42, 0.18);
}

.lvmaai-paywall__icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

.lvmaai-paywall__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: #0f172a;
}

.lvmaai-paywall__price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--wp--preset--color--primary, #1a73e8);
  margin: 0.75rem 0;
}

.lvmaai-paywall__price small {
  font-size: 0.875rem;
  font-weight: 500;
  color: #64748b;
}

.lvmaai-paywall__desc {
  color: #64748b;
  margin: 0 0 1.5rem;
}

.lvmaai-paywall__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--wp--preset--color--primary, #1a73e8);
  color: #fff !important;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.lvmaai-paywall__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -4px rgba(15, 23, 42, 0.18);
}

.lvmaai-paywall__form {
  margin-top: 1rem;
}

.lvmaai-paywall__form input[type="password"] {
  padding: 0.625rem 1rem;
  border: 1px solid rgba(15, 23, 42, 0.18);
  border-radius: 8px;
  font-size: 1rem;
  margin-right: 0.5rem;
  min-width: 200px;
}

.lvmaai-paywall__form button {
  padding: 0.625rem 1.25rem;
  background: #0f172a;
  color: #fff;
  border: 0;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}

.lvmaai-paywall__error {
  color: #dc2626;
  font-size: 0.875rem;
  margin: 0.5rem 0 0;
}