/* ============================================================
   Patch blog — uses the design tokens from main.css (:root)
   ============================================================ */

.blog-body { background: var(--bg); }

/* ---------- Article ---------- */
.article-main { max-width: 720px; margin: 0 auto; padding: 36px 24px 76px; }

.article-head { padding-bottom: 28px; border-bottom: 1px solid var(--line); margin-bottom: 34px; }
.back-link { font-family: var(--ui); font-size: 13.5px; color: var(--faint); }
.back-link:hover { color: var(--orange-d); }
.post-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 22px 0 16px; font-family: var(--mono); font-size: 12px; color: var(--faint); }
.post-meta .dot { color: var(--line2); }
.article-head h1 { font-family: var(--disp); font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1.12; letter-spacing: -0.02em; color: var(--ink); }
.article-sub { margin-top: 16px; font-size: 18.5px; line-height: 1.5; color: var(--sub); max-width: 60ch; }

/* register tags */
.tag { font-family: var(--mono); font-size: 11px; font-weight: 600; padding: 3px 9px;
  border-radius: 100px; letter-spacing: 0; white-space: nowrap; }
.tag-educational { background: var(--orange-soft); color: var(--orange-d); }
.tag-dev-blog { background: var(--green-soft); color: var(--green); }
.tag-product { background: #f1ecfd; color: #6b3fc7; }

/* body typography */
.article-body { font-size: 18px; line-height: 1.75; color: #36393f; }
.article-body p { margin: 0 0 22px; }
.article-body > :first-child { margin-top: 0; }
.article-body h2 { font-family: var(--disp); font-size: 26px; line-height: 1.2;
  letter-spacing: -0.015em; color: var(--ink); margin: 48px 0 16px; }
.article-body h3 { font-family: var(--disp); font-size: 20px; line-height: 1.25;
  color: var(--ink); margin: 34px 0 12px; }
.article-body h4 { font-family: var(--ui); font-size: 16px; font-weight: 700;
  color: var(--ink); margin: 26px 0 10px; }
.article-body a { color: var(--orange-d); text-decoration: underline;
  text-decoration-color: var(--orange-line); text-underline-offset: 2px; }
.article-body a:hover { text-decoration-color: var(--orange-d); }
.article-body strong { font-weight: 700; color: var(--ink); }
.article-body ul, .article-body ol { margin: 0 0 22px; padding-left: 26px; }
.article-body li { margin: 8px 0; }
.article-body li p { margin: 6px 0; }
.article-body li::marker { color: var(--orange); }

/* inline code */
.article-body code { font-family: var(--mono); font-size: 0.85em; color: var(--ink);
  background: var(--gray-soft); padding: 0.12em 0.42em; border-radius: 5px; border: 1px solid var(--line); }

/* code blocks (sleek dark terminal look) */
.codeblock { position: relative; margin: 0 0 24px; }
.codeblock .code-lang { position: absolute; top: 0; right: 14px; transform: translateY(-50%);
  font-family: var(--mono); font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--faint); background: var(--bg); padding: 2px 9px;
  border: 1px solid var(--line2); border-radius: 100px; }
.codeblock pre { background: #0e1117; border: 1px solid #1c2230; border-radius: 12px;
  padding: 18px; overflow-x: auto; }
.codeblock pre code { font-family: var(--mono); font-size: 13.5px; line-height: 1.65;
  color: #e7eaef; background: none; border: none; padding: 0; }

/* blockquote */
.article-body blockquote { margin: 0 0 24px; padding: 2px 0 2px 22px;
  border-left: 3px solid var(--orange); color: var(--sub); font-style: italic; }
.article-body blockquote p { margin: 0; font-size: 17.5px; line-height: 1.6; }

/* tables */
.tablewrap { overflow-x: auto; margin: 0 0 26px; border: 1px solid var(--line2); border-radius: 12px; }
.tablewrap table { border-collapse: collapse; width: 100%; font-family: var(--ui); font-size: 15px; }
.tablewrap th, .tablewrap td { text-align: left; padding: 11px 16px;
  border-bottom: 1px solid var(--line); vertical-align: top; }
.tablewrap thead th { background: var(--gray-soft); font-weight: 600; color: var(--ink);
  font-size: 12.5px; white-space: nowrap; }
.tablewrap tbody tr:last-child td { border-bottom: none; }

/* divider */
hr.sep { border: none; border-top: 1px solid var(--line2); width: 64px; margin: 42px auto; }

/* end-of-post CTA */
.post-cta { margin: 56px 0 0; padding: 30px 32px; background: var(--orange-soft);
  border: 1px solid var(--orange-line); border-radius: 16px; }
.post-cta h3 { font-family: var(--disp); font-size: 21px; line-height: 1.2; color: var(--ink); }
.post-cta p { margin: 10px 0 18px; font-size: 16px; line-height: 1.55; color: var(--sub); max-width: 52ch; }
.post-cta-act { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- Index ---------- */
.blog-index { max-width: 1140px; margin: 0 auto; padding: 0 40px 84px; }
.blog-hero { padding: 56px 0 44px; }
.blog-hero .kick { display: block; font-family: var(--mono); font-size: 12.5px;
  color: var(--faint); margin-bottom: 16px; }
.blog-hero h1 { font-family: var(--disp); font-size: clamp(30px, 5vw, 47px); line-height: 1.1;
  letter-spacing: -0.02em; color: var(--ink); max-width: 20ch; }
.blog-hero p { margin-top: 18px; font-size: 18px; line-height: 1.55; color: var(--sub); max-width: 60ch; }

.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post-card { display: flex; flex-direction: column; background: var(--paper);
  border: 1px solid var(--line2); border-radius: 16px; padding: 24px 24px 22px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.post-card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(20, 30, 50, .08);
  border-color: var(--orange-line); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 16px; }
.card-top time { font-family: var(--mono); font-size: 11.5px; color: var(--faint); }
.post-card h2 { font-family: var(--disp); font-size: 19px; line-height: 1.25;
  letter-spacing: -0.01em; color: var(--ink); margin-bottom: 10px; }
.post-card p { font-size: 14.5px; line-height: 1.5; color: var(--sub); flex: 1; }
.card-more { margin-top: 18px; font-family: var(--ui); font-size: 13.5px; font-weight: 600; color: var(--orange-d); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) {
  .post-grid { grid-template-columns: 1fr; }
  .blog-index { padding: 0 24px 64px; }
  .article-main { padding: 28px 22px 60px; }
  .article-body { font-size: 17px; line-height: 1.72; }
}