/* ============================================
   BLOG — HEADER
   ============================================ */
.blog-header {
  padding: 150px 0 60px;
  text-align: center;
}
.blog-header .section-eyebrow { justify-content: center; display: flex; }
.blog-header .section-title { margin-inline: auto; }
.blog-header .section-sub { margin-inline: auto; }

/* ============================================
   BLOG — CONTROLS (search + filters)
   ============================================ */
.blog-controls {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between;
  margin-bottom: 40px;
}
.blog-search {
  position: relative; flex: 1; min-width: 240px; max-width: 380px;
}
.blog-search input {
  width: 100%; background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-pill); padding: 12px 18px 12px 44px; color: var(--color-text);
  transition: border-color 0.3s;
}
.blog-search input:focus { border-color: var(--color-accent); }
.blog-search .material-icons-round {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--color-muted); font-size: 20px;
}
.blog-filters { display: flex; flex-wrap: wrap; gap: 10px; }
.filter-chip {
  font-size: 0.82rem; padding: 9px 18px; border-radius: var(--radius-pill);
  background: var(--color-card); border: 1px solid var(--color-border); color: var(--color-muted);
  transition: all 0.25s var(--ease);
}
.filter-chip:hover { border-color: var(--color-accent); color: var(--color-text); }
.filter-chip.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff; border-color: transparent;
}

/* ============================================
   FEATURED POST
   ============================================ */
.featured-post {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 0;
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  overflow: hidden; margin-bottom: 48px; box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.featured-post:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.featured-post-visual {
  background: linear-gradient(150deg, rgba(25,118,210,0.3), rgba(66,165,245,0.08));
  display: flex; align-items: center; justify-content: center; min-height: 240px;
}
.featured-post-visual .material-icons-round { font-size: 72px; color: var(--color-accent); }
.featured-post-body { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
.featured-badge {
  align-self: flex-start; font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-accent); background: rgba(100,181,246,0.12); padding: 5px 14px; border-radius: var(--radius-pill); margin-bottom: 16px;
}
.featured-post-body h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.5rem; margin-bottom: 12px; line-height: 1.3; }
.featured-post-body p { color: var(--color-muted); margin-bottom: 20px; }

/* ============================================
   BLOG GRID + CARD
   ============================================ */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 26px; }
.blog-card {
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s;
}
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(100,181,246,0.25); }
.blog-card-visual {
  height: 130px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(25,118,210,0.22), rgba(66,165,245,0.06));
}
.blog-card-visual .material-icons-round { font-size: 38px; color: var(--color-accent); }
.blog-card-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.blog-card-category {
  font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--color-secondary); margin-bottom: 10px;
}
.blog-card h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; margin-bottom: 10px; line-height: 1.35; }
.blog-card-excerpt { color: var(--color-muted); font-size: 0.88rem; margin-bottom: 18px; flex: 1; }
.blog-card-meta {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--font-mono); font-size: 0.74rem; color: var(--color-muted);
  padding-top: 14px; border-top: 1px solid var(--color-border);
}
.blog-card-meta .read-time { display: flex; align-items: center; gap: 4px; }
.blog-card-meta .material-icons-round { font-size: 14px; }

.blog-empty {
  grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--color-muted);
}
.blog-empty .material-icons-round { font-size: 40px; color: var(--color-border); margin-bottom: 12px; display: block; }

/* ============================================
   ARTICLE (blog-post.html)
   ============================================ */
.article-header { padding: 150px 0 40px; }
.article-back {
  display: inline-flex; align-items: center; gap: 6px; color: var(--color-muted);
  font-size: 0.88rem; margin-bottom: 28px; transition: color 0.25s, gap 0.25s;
}
.article-back:hover { color: var(--color-accent); gap: 10px; }
.article-category {
  font-family: var(--font-mono); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-accent); background: rgba(100,181,246,0.1); border: 1px solid rgba(100,181,246,0.25);
  padding: 6px 16px; border-radius: var(--radius-pill); display: inline-block; margin-bottom: 22px;
}
.article-title {
  font-family: var(--font-display); font-weight: 700; font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 24px; max-width: 820px;
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 20px; color: var(--color-muted); font-size: 0.88rem;
  padding-bottom: 32px; border-bottom: 1px solid var(--color-border);
}
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta .material-icons-round { font-size: 18px; color: var(--color-accent); }

.article-body {
  max-width: 720px; margin-inline: auto; padding: 48px 0 30px;
}
.article-body p { color: var(--color-muted); font-size: 1.05rem; margin-bottom: 22px; }
.article-body h2 {
  font-family: var(--font-display); font-weight: 600; font-size: 1.5rem; color: var(--color-text);
  margin: 40px 0 18px; letter-spacing: -0.01em;
}
.article-body blockquote {
  border-left: 3px solid var(--color-accent); background: var(--color-glass);
  padding: 20px 24px; border-radius: var(--radius-sm); margin: 28px 0;
  font-style: italic; color: var(--color-text); font-size: 1.05rem;
}
.article-body ul { display: flex; flex-direction: column; gap: 10px; margin: 22px 0; padding-left: 4px; }
.article-body ul li {
  position: relative; padding-left: 26px; color: var(--color-muted); font-size: 1rem;
}
.article-body ul li::before {
  content: ''; position: absolute; left: 0; top: 9px; width: 8px; height: 8px; border-radius: 2px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.article-tags { display: flex; flex-wrap: wrap; gap: 10px; max-width: 720px; margin: 20px auto 0; }
.article-tags span {
  font-family: var(--font-mono); font-size: 0.76rem; background: var(--color-card);
  border: 1px solid var(--color-border); color: var(--color-muted); padding: 6px 14px; border-radius: var(--radius-pill);
}

.article-share {
  max-width: 720px; margin: 32px auto 0; display: flex; align-items: center; gap: 14px;
  padding-top: 28px; border-top: 1px solid var(--color-border);
}
.article-share span:first-child { color: var(--color-muted); font-size: 0.88rem; }
.share-btn {
  width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--color-card); border: 1px solid var(--color-border); transition: transform 0.3s var(--ease), border-color 0.3s;
}
.share-btn:hover { transform: translateY(-3px); border-color: var(--color-accent); }

.related-posts { padding: 70px 0 100px; }
.related-posts h2 { font-family: var(--font-display); font-weight: 700; font-size: 1.5rem; margin-bottom: 28px; text-align: center; }

.article-loading, .article-notfound { text-align: center; padding: 160px 20px 100px; color: var(--color-muted); }
.article-notfound .material-icons-round { font-size: 42px; color: var(--color-border); margin-bottom: 14px; display: block; }

/* Reading progress reuses .scroll-progress from style.css */

@media (max-width: 700px) {
  .featured-post { grid-template-columns: 1fr; }
  .featured-post-visual { min-height: 160px; }
  .featured-post-body { padding: 28px; }
  .blog-controls { flex-direction: column; align-items: stretch; }
  .blog-search { max-width: none; }
}