/* ── Shared article page styles ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-sans); color: var(--foreground); background: var(--background); -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
:root { --purple: var(--primary); --muted: var(--muted-foreground); --bg: var(--secondary); }

/* ── Nav ── */
.site-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: 60px; background: color-mix(in srgb, var(--background) 94%, transparent); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; height: 100%; display: flex; align-items: center; gap: 1rem; }
.nav-logo { display: flex; align-items: center; gap: 8px; font-size: 17px; font-weight: 700; letter-spacing: -0.03em; color: var(--foreground); }
.nav-logo-mark { width: 24px; height: 24px; border-radius: 5px; display: block; }
.nav-end { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-link { font-size: 14px; color: var(--muted); }
.nav-link:hover { color: var(--foreground); }
.nav-cta { height: 30px; padding: 0 14px; border-radius: 999px; font-size: 13px; background: var(--purple); color: var(--primary-foreground); display: inline-flex; align-items: center; }

/* ── Article page shell ── */
.article-page { padding-top: 60px; }

/* ── Article header ── */
.article-header { padding: 60px 0 48px; border-bottom: 1px solid var(--border); }
.article-header-inner { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }
.back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); margin-bottom: 28px; transition: color .15s; }
.back-link:hover { color: var(--foreground); }
.ah-tag { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--purple); background: color-mix(in srgb, var(--primary) 8%, transparent); padding: 3px 10px; border-radius: 999px; margin-bottom: 16px; }
.ah-title { font-size: clamp(28px, 4vw, 44px); font-weight: 400; letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 20px; }
.ah-meta { display: flex; align-items: center; gap: 16px; }
.ah-author { display: flex; align-items: center; gap: 8px; }
.ah-avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--purple); color: var(--primary-foreground); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; flex-shrink: 0; }
.ah-name { font-size: 13px; font-weight: 600; }
.ah-sep { width: 1px; height: 14px; background: var(--border); }
.ah-date { font-size: 13px; color: var(--muted); }
.ah-read { font-size: 13px; color: var(--muted); }

/* ── Article body ── */
.article-body { max-width: 720px; margin: 0 auto; padding: 48px 1.5rem 80px; }
.article-body h2 { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin: 40px 0 14px; }
.article-body h3 { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; margin: 28px 0 10px; }
.article-body p { font-size: 16px; line-height: 1.78; color: var(--foreground); margin-bottom: 20px; }
.article-body ul, .article-body ol { margin: 0 0 20px 1.4rem; }
.article-body li { font-size: 16px; line-height: 1.75; color: var(--foreground); margin-bottom: 6px; }
.article-body strong { font-weight: 600; color: var(--foreground); }
.article-body a { color: var(--purple); }
.article-body a:hover { text-decoration: underline; }
.article-body blockquote {
  border-left: 3px solid var(--purple); margin: 28px 0;
  padding: 12px 20px; background: color-mix(in srgb, var(--primary) 4%, transparent); border-radius: 0 10px 10px 0;
  font-size: 16px; color: var(--muted-foreground); line-height: 1.7; font-style: italic;
}
.article-body code {
  font-family: "SF Mono", "Fira Code", monospace; font-size: 13px;
  background: var(--accent); color: var(--purple); padding: 2px 6px; border-radius: 4px;
}
.article-body pre {
  background: #0d1117; border-radius: 12px; padding: 20px;
  font-family: "SF Mono", "Fira Code", monospace; font-size: 13px;
  line-height: 1.7; color: #e6edf3; overflow-x: auto; margin: 20px 0;
}
.article-body pre code { background: none; color: inherit; padding: 0; }
.callout {
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px 22px; margin: 28px 0; font-size: 15px; line-height: 1.65; color: var(--foreground);
}
.callout strong { color: var(--foreground); }
.data-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.data-table th { text-align: left; font-size: 11px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); padding: 8px 12px; border-bottom: 2px solid var(--border); }
.data-table td { padding: 11px 12px; border-bottom: 1px solid var(--border); color: var(--foreground); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg); }
.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.pill-green { background: #d1fae5; color: #065f46; }
.pill-blue { background: #dbeafe; color: #1e40af; }
.pill-purple { background: #ede9fe; color: #5b21b6; }

/* ── Related articles ── */
.related { border-top: 1px solid var(--border); padding: 60px 0; }
.related-inner { max-width: 720px; margin: 0 auto; padding: 0 1.5rem; }
.related h4 { font-size: 13px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); margin-bottom: 20px; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.related-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; transition: box-shadow .2s; }
.related-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.rc-tag { font-size: 10px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--purple); margin-bottom: 7px; }
.rc-title { font-size: 14px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.35; color: var(--foreground); }
@media (max-width: 600px) { .related-grid { grid-template-columns: 1fr; } }