:root {
  color-scheme: light;
  --bg: #FBFAF8;
  --card: #ffffff;
  --ink: #16161A;
  --muted: #63636d;
  --line: #dce2e7;
  --soft: #eaf4ed;
  --accent: #29754b;
  --accent-dark: #24653f;
}

html[data-theme='dark'] { color-scheme: dark; --bg: #0D1014; --card: #191E24; --ink: #F3F5F7; --muted: #AAB3BD; --line: #303840; --soft: #182e24; --accent: #77cc99; --accent-dark: #8cd9aa; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; }
a { color: inherit; }
img { max-width: 100%; }
.wrap { width: min(100% - 40px, 1180px); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(14px); }
.site-header .wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; text-decoration: none; letter-spacing: -.03em; }
.brand-mark { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: var(--ink); color: var(--bg); font: 600 13px ui-monospace, monospace; }
.site-nav { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; }
.site-nav a { color: var(--muted); font-size: .92rem; font-weight: 650; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }

.hero { padding: 64px 0 48px; border-bottom: 1px solid var(--line); background: var(--card); }
.eyebrow { margin: 0 0 12px; color: var(--accent); font: 800 .75rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .1em; text-transform: uppercase; }
h1 { max-width: 920px; margin: 0; font-size: clamp(2.45rem, 6vw, 5.25rem); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 780px; margin: 22px 0 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.2rem); }

.blog-navigation { padding-top: 30px; }
.blog-live-updates:not([hidden]) { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; padding-block: 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
.blog-live-updates [role='status'] { flex: 1; min-width: 200px; }
.blog-live-updates button { min-height: 44px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--ink); cursor: pointer; }
.category-nav { display: flex; gap: 10px; overflow-x: auto; padding: 0 0 10px; scrollbar-width: thin; }
.category-nav a { flex: 0 0 auto; padding: 9px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); color: var(--muted); font-size: .88rem; font-weight: 700; text-decoration: none; }
.category-nav a:hover { border-color: #a9b4be; color: var(--ink); }
.category-nav a[aria-current="page"] { border-color: var(--ink); background: var(--ink); color: var(--bg); }

.article-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 24px; padding: 34px 0 88px; }
.article-card { min-width: 0; }
.card-image { display: block; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: #dfe9f4; }
.card-image img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .25s ease; }
.article-card:hover .card-image img { transform: scale(1.025); }
.card-body { padding: 18px 4px 0; }
.card-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 11px; color: var(--muted); font-size: .79rem; }
.category-tag { display: inline-flex; width: fit-content; padding: 5px 9px; border-radius: 7px; background: var(--soft); color: var(--accent-dark); font-size: .75rem; font-weight: 800; text-decoration: none; }
.article-card h2 { margin: 0; font-size: clamp(1.35rem, 2.5vw, 2rem); line-height: 1.13; letter-spacing: -.028em; }
.article-card h2 a { text-decoration: none; }
.article-card h2 a:hover { color: var(--accent); }
.article-card p { margin: 12px 0 0; color: var(--muted); }
.read-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 15px; color: var(--accent-dark); font-weight: 800; text-decoration: none; }
.read-link:hover { color: var(--accent); }
.article-card-featured { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, .8fr); gap: 28px; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.article-card-featured .card-body { padding: 0; }
.article-card-featured h2 { font-size: clamp(1.9rem, 4vw, 3.15rem); }

.meta { color: var(--muted); font-size: .86rem; }
.breadcrumbs { display: flex; gap: 9px; margin-bottom: 28px; color: var(--muted); font-size: .86rem; }
.breadcrumbs a { text-underline-offset: 3px; }
.article-shell { width: min(100% - 40px, 860px); padding: 70px 0 100px; }
.article-main h1 { font-size: clamp(2.45rem, 6vw, 4.8rem); }
.article-byline { display: flex; align-items: center; gap: 14px; margin-top: 24px; }
.article-content h2 { margin: 3.2rem 0 .7rem; font-size: clamp(1.65rem, 3vw, 2.2rem); line-height: 1.15; letter-spacing: -.025em; }
.article-content h3 { margin: 2rem 0 .5rem; font-size: 1.25rem; }
.article-content h4 { margin: 1.7rem 0 .4rem; font-size: 1.05rem; }
.article-content p, .article-content li { color: var(--ink); overflow-wrap: anywhere; }
.article-content ul, .article-content ol { padding-left: 1.3rem; }
.article-content li + li { margin-top: .55rem; }
.article-content a { color: var(--accent-dark); text-underline-offset: 3px; }
.article-hero { margin: 34px 0; }
.article-hero img { display: block; width: 100%; max-height: 540px; object-fit: cover; border: 1px solid var(--line); border-radius: 22px; background: #dfe9f4; }
.article-hero figcaption { margin-top: 8px; color: var(--muted); font-size: .78rem; }
.source-note { position: sticky; top: 98px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); }
.source-note strong { display: block; margin-bottom: 10px; }
.source-list a { display: block; padding: 6px 0; color: var(--muted); font-size: .88rem; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.source-list a:hover { color: var(--ink); }
.article-source { margin-top: 54px; padding-top: 22px; border-top: 1px solid var(--line); }
.article-source strong { display: block; margin-bottom: 8px; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; }
.article-source a { color: var(--accent-dark); font-weight: 700; text-underline-offset: 3px; }
.toc { position: sticky; top: 98px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); }
.toc strong { display: block; margin-bottom: 10px; }
.toc a { display: block; padding: 5px 0; color: var(--muted); font-size: .88rem; text-decoration: none; }
.toc a:hover { color: var(--ink); }
.summary { margin: 30px 0; padding: 22px; border-left: 4px solid var(--accent); background: var(--soft); }
.summary p { margin: 0; }
.article-main table { width: 100%; border-collapse: collapse; margin: 1.4rem 0 2rem; font-size: .93rem; }
.article-main th, .article-main td { padding: 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.article-main th { background: var(--soft); }
.empty-state { min-height: 58vh; padding-block: 86px; }
.empty-state h1 { font-size: clamp(2.5rem, 6vw, 4.8rem); }
.empty-state h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 3rem); }
.empty-state p { max-width: 620px; color: var(--muted); }
.site-footer { padding: 34px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .86rem; background: var(--card); }

[data-theme-toggle] { min-height: 44px; min-width: 56px; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; background: var(--card); color: var(--ink); cursor: pointer; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; }
.article-content pre { max-width: 100%; overflow: auto; }
.article-main table { display: block; max-width: 100%; overflow-x: auto; }
@media (max-width: 600px) { .site-header .wrap { flex-wrap: wrap; padding-block: 12px; gap: 8px; } .site-nav { gap: 16px; width: 100%; justify-content: space-between; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .card-image img { transition: none; } }

@media (max-width: 860px) {
  .article-card-featured { grid-template-columns: 1fr; }
  .article-shell { width: min(100% - 28px, 860px); }
  .source-note { position: static; }
  .toc { position: static; }
}

@media (max-width: 660px) {
  .wrap { width: min(100% - 28px, 1180px); }
  .site-header .wrap { min-height: 60px; }
  .site-nav { gap: 14px; }
  .site-nav a { font-size: .82rem; }
  .hero { padding: 54px 0 42px; }
  .article-list { grid-template-columns: 1fr; gap: 34px; }
  .article-card-featured { grid-column: auto; }
  .card-body { padding-inline: 2px; }
}