/* article.css — shared stylesheet for /YYYY/MM/DD/slug/index.html article pages.
   Mirrors the design tokens from / (index.html) and adds article reading styles. */

:root {
  --bg: #fafaf9;
  --bg-soft: #f5f5f4;
  --bg-card: #ffffff;
  --fg: #0a0a0a;
  --fg-soft: #44403c;
  --fg-muted: #78716c;
  --line: #e7e5e4;
  --line-strong: #d6d3d1;
  --accent: #047857;
  --accent-soft: #d1fae5;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", "Menlo", "Consolas", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, sans-serif;
  --radius: 6px;
  --maxw: 920px;
  --readw: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0c0c;
    --bg-soft: #141414;
    --bg-card: #161616;
    --fg: #fafaf9;
    --fg-soft: #d6d3d1;
    --fg-muted: #a8a29e;
    --line: #262626;
    --line-strong: #303030;
    --accent: #34d399;
    --accent-soft: #064e3b;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s ease;
}
a:hover { border-bottom-color: var(--accent); }
::selection { background: var(--accent); color: var(--bg); }

/* Top nav (matches homepage) */
.nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; max-width: var(--maxw); margin: 0 auto;
  font-family: var(--mono); font-size: 13px;
}
.nav-brand { color: var(--fg); font-weight: 600; border: none; }
.nav-brand .dot { color: var(--accent); }
.nav-links { display: flex; gap: 22px; }
.nav-links a { color: var(--fg-muted); border: none; }
.nav-links a:hover { color: var(--fg); }
@media (max-width: 640px) { .nav-links { display: none; } }

/* Article container */
.article-wrap {
  max-width: var(--readw);
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.back-link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--fg-muted);
  border: none;
  display: inline-block;
  margin-bottom: 32px;
}
.back-link:hover { color: var(--accent); border: none; }

.article-head {
  margin: 0 0 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.article-meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 18px;
}
.article-meta .dot { margin: 0 8px; opacity: .55; }
.article-meta .kind { color: var(--accent); }
.article-title {
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0;
  color: var(--fg);
}

/* Article prose */
.article-body {
  font-size: 18px;
  line-height: 1.72;
  color: var(--fg-soft);
}
.article-body > *:first-child { margin-top: 0; }
.article-body p { margin: 0 0 1.25em; }
.article-body h2,
.article-body h3,
.article-body h4 {
  color: var(--fg);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 2em 0 0.6em;
}
.article-body h2 { font-size: 26px; }
.article-body h3 { font-size: 21px; }
.article-body h4 { font-size: 18px; font-family: var(--mono); }
.article-body strong, .article-body b { color: var(--fg); font-weight: 600; }
.article-body em, .article-body i { color: var(--fg-soft); }
.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1.6em auto;
  display: block;
  border: 1px solid var(--line);
}
.article-body figure { margin: 1.6em 0; }
.article-body figure img { margin: 0 auto; }
.article-body figcaption {
  font-size: 14px;
  color: var(--fg-muted);
  text-align: center;
  margin-top: 10px;
  font-family: var(--mono);
}
.article-body ul,
.article-body ol { padding-left: 1.4em; margin: 0 0 1.25em; }
.article-body li { margin-bottom: .4em; }
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 18px;
  margin: 1.6em 0;
  color: var(--fg-soft);
  font-style: italic;
}
.article-body iframe,
.article-body video,
.article-body embed,
.article-body audio {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1.6em 0;
  border: 1px solid var(--line);
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}

/* Source / external link card (when WP post is essentially a "Lue koko juttu" link) */
.article-source {
  margin-top: 28px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg-muted);
}
.article-source a { color: var(--accent); border-bottom: 1px dashed color-mix(in srgb, var(--accent) 50%, transparent); }
.article-source a:hover { border-bottom-style: solid; }

/* Tag/category footer */
.article-foot {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.article-tags {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.article-tags .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: lowercase;
  color: var(--fg-muted);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 999px;
}

/* Site footer */
.site-foot {
  border-top: 1px solid var(--line);
  margin-top: 0;
  padding: 28px 0;
  background: var(--bg-soft);
}
.site-foot .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.foot-line {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--fg-muted);
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
}
.foot-line a { color: var(--fg-muted); border: none; }
.foot-line a:hover { color: var(--accent); }