/* ============================================================
   Offset Studio — Blog (index + article)
   Loads on top of public.css (nav/footer/lang-toggle come from there).
   ============================================================ */

html{scroll-behavior:smooth;scroll-padding-top:104px}

.blog-wrap{max-width:1040px;margin:0 auto;padding:130px 24px 80px}

/* ---- blog head ---- */
.blog-head{text-align:center;margin-bottom:48px}
.blog-head .eyebrow{justify-content:center;margin-bottom:22px}
.blog-head .eyebrow::before{display:none}
.blog-head h1{font-size:clamp(30px,4.5vw,44px);font-weight:700;letter-spacing:-.03em;line-height:1.15;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.blog-head .lede{max-width:560px;margin:16px auto 0;color:var(--text-2);font-size:15.5px}

/* ---- blog index cards ---- */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.post-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:28px;display:flex;flex-direction:column;gap:14px;color:var(--text-1);text-decoration:none;transition:border-color .25s,transform .25s}
.post-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.post-cover{font-size:40px;line-height:1}
.post-cover img{width:100%;height:180px;object-fit:cover;border-radius:12px;display:block}
.post-card h2{font-size:19px;font-weight:600;line-height:1.3}
.post-card .excerpt{color:var(--text-2);font-size:14px;line-height:1.6;flex:1}
.post-meta{font-family:var(--font-mono);font-size:12px;color:var(--text-3)}
.post-read{color:var(--accent);font-weight:600;font-size:14px}
.post-category{display:inline-flex;align-items:center;width:max-content;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);border:1px solid var(--border);border-radius:999px;padding:3px 10px}
.article-header .post-category{margin-bottom:16px}

/* ---- article layout: two-column grid (TOC left rail | article right) ---- */
.blog-layout{
  max-width:1040px;margin:0 auto;
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  column-gap:72px;
  align-items:start;
}
.blog-layout.no-toc{grid-template-columns:minmax(0,1fr);max-width:760px}

.blog-toc{grid-column:1;position:sticky;top:104px;align-self:start}
.blog-article{grid-column:2;min-width:0}

/* ---- article header (inside the article column) ---- */
.article-header{margin-bottom:30px}
.article-header .eyebrow{margin-bottom:18px}
.article-header h1{font-size:clamp(28px,4vw,42px);font-weight:700;letter-spacing:-.02em;line-height:1.15;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.post-date{font-family:var(--font-mono);font-size:12.5px;color:var(--text-3);margin-top:16px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* ---- table of contents (sticky left rail, Framer-style white indicator) ---- */
.blog-toc-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3)}
.blog-toc-toggle{display:flex;align-items:center;gap:8px;background:none;border:none;padding:0;margin:0;color:inherit;cursor:default;pointer-events:none;font-family:inherit}
.blog-toc-chevron{display:none;color:var(--text-3);flex:0 0 auto}
.blog-toc-nav{display:flex;flex-direction:column;margin-top:18px}
.blog-toc-item{position:relative;display:block;color:var(--text-3);font-size:14px;line-height:1.5;padding:6px 0;padding-inline-start:18px;text-decoration:none;transition:color .15s ease}
.blog-toc-item::before{content:"";position:absolute;inset-inline-start:0;top:50%;transform:translateY(-50%);width:2px;height:0;background:var(--text-1);border-radius:1px;transition:height .2s ease}
.blog-toc-item:hover{color:var(--text-1)}
.blog-toc-item.active{color:var(--text-1);font-weight:600}
.blog-toc-item.active::before{height:16px}
.blog-toc-item.toc-h3{padding-inline-start:34px;font-size:13px}

/* ---- article typography ---- */
.article-body{font-size:16px;line-height:1.75;color:var(--text-2)}
.article-body h2{font-size:26px;font-weight:700;color:var(--text-1);margin:46px 0 16px;letter-spacing:-.01em;line-height:1.25}
.article-body h3{font-size:20px;font-weight:600;color:var(--text-1);margin:32px 0 12px;line-height:1.3}
.article-body p{margin-bottom:18px}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.article-body ul,.article-body ol{margin:0 0 18px 22px;display:flex;flex-direction:column;gap:9px}
.article-body li::marker{color:var(--accent)}
.article-body code{font-family:var(--font-mono);font-size:13.5px;background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:1px 6px;color:var(--accent)}
.article-body blockquote{border-left:3px solid var(--accent);padding:4px 0 4px 20px;margin:26px 0;font-size:17px;color:var(--text-1);font-style:italic;line-height:1.6}
.article-body pre.post-code{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;overflow-x:auto;margin:22px 0}
.article-body pre.post-code code{background:none;border:none;padding:0;color:var(--text-2);font-size:13px;line-height:1.6;display:block}

/* ---- visuals ---- */
.post-swatches{display:flex;gap:10px;margin:24px 0;flex-wrap:wrap}
.post-swatch{flex:1;min-width:90px;height:72px;border-radius:12px;display:flex;align-items:flex-end;justify-content:center;padding:8px;border:1px solid rgba(255,255,255,.1)}
.post-swatch span{font-family:var(--font-mono);font-size:11px;background:rgba(0,0,0,.55);color:#fff;padding:3px 7px;border-radius:5px}
.post-convert{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;margin:24px 0}
.post-convert pre{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 18px;overflow-x:auto;margin:0}
.post-convert code{font-family:var(--font-mono);font-size:13px;color:var(--text-2);background:none;border:none;padding:0}
.post-arrow{color:var(--accent);font-size:20px}

/* ---- more posts ---- */
.more-posts{margin-top:60px;border-top:1px solid var(--border);padding-top:36px}
.more-posts h3{font-size:18px;font-weight:600;margin-bottom:20px}
.more-posts .blog-grid{margin-top:0}

/* ---- RTL ---- */
html[lang="fa"] .article-body blockquote{border-left:none;border-right:3px solid var(--accent);padding:4px 20px 4px 0}

/* ---- responsive: collapse to single column + collapsible TOC ---- */
@media (max-width:900px){
  .blog-layout{grid-template-columns:1fr;column-gap:0;max-width:720px}
  .blog-layout.no-toc{max-width:720px}

  /* flatten the article so its header/body become grid items we can reorder */
  .blog-article{display:contents}

  /* visual order: header → TOC → body → more-posts */
  .article-header{order:1}
  .blog-toc{order:2;position:static;grid-column:auto;align-self:auto;background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:36px}
  .article-body{order:3}
  .more-posts{order:4}

  /* collapsible TOC */
  .blog-toc-toggle{pointer-events:auto;cursor:pointer;width:100%;justify-content:space-between;padding:15px 18px}
  .blog-toc-toggle .blog-toc-label{margin:0;color:var(--text-1)}
  .blog-toc-chevron{display:block;transition:transform .25s ease}
  .blog-toc.open .blog-toc-chevron{transform:rotate(180deg)}
  .blog-toc-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
  .blog-toc.open .blog-toc-panel{grid-template-rows:1fr}
  .blog-toc-panel > .blog-toc-nav{overflow:hidden;min-height:0;margin-top:0;padding:0 18px}
  .blog-toc-panel > .blog-toc-nav .blog-toc-item:last-child{margin-bottom:16px}
  .blog-toc-item{min-height:44px;display:flex;align-items:center}
}
@media (max-width:640px){
  .post-convert{grid-template-columns:1fr}
  .post-arrow{transform:rotate(90deg);justify-self:center}
}