/* =========================================================
   Blog — extends styles.css design tokens (navy / sky / gray)
   Loaded ONLY on /blog/ pages, in addition to styles.css
   ========================================================= */

/* Active nav item (Blog) */
.site-nav a.is-active{ color:var(--white); }
.site-nav a.is-active::after{ transform:scaleX(1); }

/* Breadcrumb */
.breadcrumb{
  display:flex; flex-wrap:wrap; align-items:center; gap:.5em;
  font-family:var(--font-mono); font-size:.78rem; color:var(--ink-muted);
  margin:0 0 28px;
}
.breadcrumb a{ color:var(--ink-muted); text-decoration:none; }
.breadcrumb a:hover{ color:var(--sky-600); text-decoration:underline; }
.breadcrumb span[aria-current]{ color:var(--navy-900); }
.breadcrumb .sep{ opacity:.5; }

/* Blog index hero */
.blog-hero{ padding:64px 0 40px; background:var(--paper); }
.blog-hero h1{ max-width:20ch; }
.blog-hero p{ max-width:56ch; color:var(--ink-muted); font-size:1.05rem; }

.blog-search{
  display:flex; align-items:center; gap:10px;
  max-width:420px; margin-top:1.6em;
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius-sm);
  padding:.7em 1em;
}
.blog-search svg{ width:18px; height:18px; color:var(--ink-muted); flex:none; }
.blog-search input{
  border:none; outline:none; background:none; font-family:var(--font-body);
  font-size:.95rem; width:100%; color:var(--ink);
}

/* Category filter pills */
.category-pills{ display:flex; flex-wrap:wrap; gap:10px; margin:28px 0 0; }
.pill{
  font-family:var(--font-mono); font-size:.76rem; letter-spacing:.03em;
  padding:.5em 1em; border-radius:999px; border:1px solid var(--line);
  background:var(--white); color:var(--ink-muted); cursor:pointer;
  transition:all .2s ease;
}
.pill:hover{ border-color:var(--sky); color:var(--navy-900); }
.pill[aria-pressed="true"]{ background:var(--navy-900); border-color:var(--navy-900); color:var(--white); }
.pill-count{ opacity:.65; margin-left:.35em; }

/* Post grid + cards */
.post-grid{
  display:grid; grid-template-columns:repeat(3, 1fr); gap:26px;
  padding:48px 0 88px;
}
.post-card{
  display:flex; flex-direction:column; gap:14px;
  border:1px solid var(--line); border-radius:var(--radius);
  padding:26px; text-decoration:none; background:var(--white);
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.post-card:hover{
  transform:translateY(-5px); border-color:var(--sky);
  box-shadow:0 16px 34px -18px rgba(11,37,69,.28), var(--shadow-glow);
}
.post-card .pill{ align-self:flex-start; pointer-events:none; }
.post-card h2, .post-card h3{
  font-size:1.15rem; margin:0; color:var(--navy-900); line-height:1.3;
}
.post-card p{ color:var(--ink-muted); font-size:.92rem; margin:0; flex:1; }
.post-card-meta{
  display:flex; align-items:center; gap:.6em;
  font-family:var(--font-mono); font-size:.74rem; color:var(--ink-muted);
  padding-top:10px; border-top:1px solid var(--line);
}
.post-card-empty{
  grid-column:1 / -1; text-align:center; padding:48px 24px;
  color:var(--ink-muted); font-size:.95rem;
}

/* Article header */
.article-header{ padding:48px 0 8px; }
.article-header .pill{ pointer-events:none; margin-bottom:18px; }
.article-header h1{ max-width:24ch; }
.article-lead{ max-width:62ch; color:var(--ink-muted); font-size:1.08rem; margin-top:.8em; }

.article-meta{
  display:flex; flex-wrap:wrap; align-items:center; gap:.5em 1.4em;
  font-family:var(--font-mono); font-size:.8rem; color:var(--ink-muted);
  margin:28px 0 0; padding:20px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line);
}
.article-meta img{
  width:28px; height:28px; border-radius:50%; object-fit:cover; margin-right:.5em;
  vertical-align:middle;
}
.article-meta .meta-author{ display:flex; align-items:center; color:var(--navy-900); font-weight:600; }

/* Article layout: TOC + body */
.article-layout{
  display:grid; grid-template-columns:220px 1fr; gap:56px;
  padding:40px 0 24px; align-items:start;
}
.article-toc{
  position:sticky; top:100px; border-left:2px solid var(--line); padding-left:18px;
}
.article-toc p{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase;
  color:var(--navy-700); margin:0 0 .8em;
}
.article-toc ol{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:.6em; }
.article-toc a{
  color:var(--ink-muted); text-decoration:none; font-size:.88rem; line-height:1.4; display:block;
}
.article-toc a:hover{ color:var(--sky-600); }

.article-body{ max-width:68ch; }
.article-body h2{
  margin-top:1.8em; padding-top:.2em; scroll-margin-top:100px;
  font-size:clamp(1.3rem, 1.15rem + .6vw, 1.55rem);
}
.article-body h3{ margin-top:1.4em; scroll-margin-top:100px; font-size:1.1rem; }
.article-body p{ color:var(--ink); }
.article-body ul, .article-body ol{ color:var(--ink); padding-left:1.3em; margin:0 0 1em; }
.article-body li{ margin-bottom:.4em; }
.article-body strong{ color:var(--navy-900); }
.article-body a{ color:var(--sky-600); text-decoration:underline; text-decoration-color:var(--line); text-underline-offset:2px; }
.article-body a:hover{ text-decoration-color:var(--sky-600); }

.callout{
  margin:2em 0; padding:20px 22px; border-left:3px solid var(--sky);
  background:var(--gray-100); border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-size:.94rem; color:var(--ink);
}
.callout strong{ color:var(--navy-900); }

.article-table{ width:100%; border-collapse:collapse; margin:1.6em 0; font-size:.9rem; }
.article-table th, .article-table td{
  border:1px solid var(--line); padding:.7em .9em; text-align:left;
}
.article-table th{ background:var(--gray-100); font-family:var(--font-mono); font-size:.76rem; text-transform:uppercase; letter-spacing:.04em; color:var(--navy-700); }

.article-cta{
  margin:2.6em 0; padding:30px 28px; background:var(--navy-900); border-radius:var(--radius);
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:20px;
}
.article-cta p{ color:var(--white); font-family:var(--font-display); font-size:1.15rem; margin:0; max-width:32ch; }
.article-cta .btn{ flex:none; }

/* FAQ reuses .accordion from styles.css */
.article-body .accordion{ margin-top:1em; }

/* Author box */
.author-box{
  display:flex; gap:18px; align-items:flex-start;
  margin:3em 0 0; padding:24px; border:1px solid var(--line); border-radius:var(--radius);
  background:var(--paper);
}
.author-box img{ width:64px; height:64px; border-radius:50%; object-fit:cover; flex:none; border:2px solid var(--white); box-shadow:0 0 0 2px var(--sky); }
.author-box strong{ display:block; font-family:var(--font-display); color:var(--navy-900); font-size:1.02rem; }
.author-box span{ font-family:var(--font-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em; color:var(--sky-600); }
.author-box p{ margin:.5em 0 0; color:var(--ink-muted); font-size:.9rem; }

/* Related posts */
.related-posts{ padding:24px 0 88px; }
.related-posts h2{ font-size:1.3rem; margin-bottom:1em; }
.related-grid{ display:grid; grid-template-columns:repeat(2, 1fr); gap:22px; }

/* Responsive */
@media (max-width: 980px){
  .post-grid{ grid-template-columns:1fr 1fr; }
  .article-layout{ grid-template-columns:1fr; }
  .article-toc{ position:static; border-left:none; padding-left:0; border-top:1px solid var(--line); padding-top:18px; }
  .related-grid{ grid-template-columns:1fr; }
}
@media (max-width: 760px){
  .post-grid{ grid-template-columns:1fr; }
  .article-cta{ flex-direction:column; align-items:flex-start; }
  .article-cta .btn{ width:100%; text-align:center; }
}