/* ─────────────────────────────────────────────
   POSTS — styles exclusive to posts.html
   Depends on: css/shared.css
   ───────────────────────────────────────────── */

/* ── NAV (reused from story pattern) ── */
.nav-back {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray-400);
  text-decoration: none;
  transition: color .2s;
}

.nav-back:hover {
  color: var(--black);
}

.nav-issue {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gray-400);
  text-transform: uppercase;
}

/* ── CHAPTER HEADER ── */
.chapter-header {
  padding: 112px 40px 80px;
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
  border-bottom: var(--gutter);
  margin-bottom: 80px;
}

.chapter-header .overline {
  font-size: 10px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 28px;
  display: block;
}

.chapter-header h1 {
  font-family: var(--serif);
  font-size: clamp(52px, 8vw, 88px);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  text-wrap: balance;
  margin-bottom: 24px;
}

.chapter-header .subhead {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  color: var(--gray-500);
  text-wrap: balance;
  max-width: 48ch;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── FILTER BAR ── */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 64px;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 20px;
}

.filter-btn {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray-400);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 6px 12px;
  cursor: pointer;
  transition: color .2s, border-color .2s;
}

.filter-btn:hover {
  color: var(--black);
}

.filter-btn.active {
  color: var(--black);
  border-bottom-color: var(--black);
  font-weight: 500;
}

/* ── POST LIST ── */
.posts-list {
  display: flex;
  flex-direction: column;
}

.post-item {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 32px 0;
  border-top: 1px solid var(--gray-200);
  transition: padding-left .3s var(--ease-out);
}

.post-item:last-child {
  border-bottom: 1px solid var(--gray-200);
}

.post-item:hover {
  padding-left: 16px;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 10px;
}

.post-category {
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}

.post-date {
  font-size: 11px;
  color: var(--gray-400);
  letter-spacing: .04em;
}

.post-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
}

.post-summary {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.7;
  max-width: 60ch;
  margin-bottom: 12px;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.post-tag {
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--gray-400);
  border: 1px solid var(--gray-200);
  padding: 3px 10px;
}

/* ── EMPTY STATE ── */
.posts-empty {
  text-align: center;
  padding: 80px 0;
  color: var(--gray-400);
  font-size: 14px;
  font-style: italic;
  display: none;
}

/* ── FADE-IN ANIMATION ── */
@keyframes postFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post-fade-in {
  animation: postFadeIn 300ms var(--ease-out) both;
}

/* ── FOOTER ── */
footer {
  border-top: var(--gutter);
  padding: 48px 40px;
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

footer .footer-note {
  font-size: 11px;
  color: var(--gray-400);
  letter-spacing: .06em;
}

.back-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--black);
  text-decoration: none;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--black);
  padding-bottom: 2px;
  transition: opacity .2s, letter-spacing .2s;
}

.back-link:hover {
  opacity: .5;
  letter-spacing: .06em;
}

/* ── SCROLL REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

.reveal.in,
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── RESPONSIVE ── */
@media (max-width: 720px) {
  .chapter-header {
    padding: 64px 24px 48px;
  }

  .filter-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  .filter-btn {
    white-space: nowrap;
  }

  .wrap {
    padding: 0 24px;
  }

  footer {
    flex-direction: column;
    gap: 16px;
    text-align: center;
    padding: 40px 24px;
  }
}