/* ============================================================
   IYOSUI Theme - News (archive / single / index / search)
   ============================================================ */

/* ---- Category filter ------------------------------------- */
.news-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: var(--sp-lg);
}

.news-filter__btn {
  display: inline-flex;
  align-items: center;
  padding: .4em 1.2em;
  font-size: .82rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: 2em;
  color: var(--color-text-sub);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.news-filter__btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

.news-filter__btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ---- News card grid -------------------------------------- */
.news-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-lg) var(--sp-md);
}

.news-card {
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
}

.news-card:hover { transform: translateY(-3px); }

.news-card__thumb {
  aspect-ratio: 16/10;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-bg-seafoam);
  margin-bottom: .9rem;
}

.news-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.news-card:hover .news-card__thumb img { transform: scale(1.05); }

.news-card__meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .5rem;
}

.news-card__date {
  font-family: var(--font-en);
  font-size: .8rem;
  color: var(--color-text-sub);
}

.news-card__title {
  font-size: .98rem;
  font-weight: 700;
  line-height: 1.6;
}

.news-card__title a:hover { color: var(--color-primary); }

.no-posts {
  text-align: center;
  padding-block: var(--sp-xl);
  color: var(--color-text-sub);
}

/* ---- Single article -------------------------------------- */
.single-article__header {
  margin-bottom: var(--sp-md);
  padding-bottom: var(--sp-md);
  border-bottom: 1px solid var(--color-border-light);
}

.single-article__meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .75rem;
}

.single-article__date {
  font-family: var(--font-en);
  font-size: .85rem;
  color: var(--color-text-sub);
}

.single-article__title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.45;
}

.single-article__thumb {
  margin-bottom: var(--sp-md);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.single-article__body { margin-top: var(--sp-md); }

/* ---- Post navigation ------------------------------------- */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-md);
  margin-top: var(--sp-xl);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--color-border-light);
}

.post-nav__prev,
.post-nav__next {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.post-nav__next { text-align: right; }

.post-nav__label {
  font-size: .78rem;
  color: var(--color-primary);
  font-weight: 600;
}

.post-nav a {
  font-size: .9rem;
  line-height: 1.5;
  transition: color var(--transition);
}

.post-nav a:hover { color: var(--color-primary); }

.post-back {
  text-align: center;
  margin-top: var(--sp-lg);
}

/* ---- Responsive ------------------------------------------ */
@media (max-width: 900px) {
  .news-card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .news-card-grid { grid-template-columns: 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav__next { text-align: left; }
}