/* Shared styles for static AI-SEO subpages.
 * Self-contained: each subpage links to /styles/article.css and ships
 * without the SPA bundle. Minimal token system mirrors designTokens.js
 * so the brand stays consistent across landing and article pages.
 */

:root {
  --color-charcoal: #1a1a1a;
  --color-cream: #f4efe6;
  --color-cream-muted: #d6cfc1;
  --color-cream-subtle: #a89f8e;
  --color-bronze: #b08d57;
  --color-ink: #1a1a1a;
  --color-ink-muted: #4a4a4a;
  --color-rule: #e0dccf;
  --color-rule-dark: #2a2a2a;
  --color-paper: #fafaf7;
  --color-warning: #b04a3c;
}

* {
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.serif {
  font-family: 'Newsreader', Georgia, 'Times New Roman', serif;
  font-weight: 400;
  letter-spacing: -0.015em;
}

.site-header {
  background: var(--color-charcoal);
  color: var(--color-cream);
  padding: 22px 0;
  border-bottom: 1px solid var(--color-rule-dark);
}

.site-header .inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header a.logo {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 22px;
  color: var(--color-cream);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-header a.cta {
  color: var(--color-cream);
  text-decoration: none;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--color-cream-muted);
  padding: 8px 16px;
  border-radius: 999px;
  transition: color 200ms, border-color 200ms;
}

.site-header a.cta:hover {
  color: var(--color-bronze);
  border-color: var(--color-bronze);
}

article {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

article .eyebrow {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  margin-bottom: 12px;
}

article h1 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 400;
  margin: 0 0 24px;
  color: var(--color-ink);
}

article .lead {
  font-size: 19px;
  line-height: 1.55;
  color: var(--color-ink);
  margin-bottom: 40px;
  max-width: 60ch;
}

article h2 {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.6rem;
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 400;
  margin: 56px 0 16px;
  color: var(--color-ink);
}

article h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 8px;
  color: var(--color-ink);
}

article p {
  margin: 0 0 16px;
}

article ul, article ol {
  margin: 0 0 16px;
  padding-left: 22px;
}

article li {
  margin-bottom: 6px;
}

article strong {
  font-weight: 600;
}

article a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-bronze);
  text-underline-offset: 3px;
}

article a:hover {
  color: var(--color-bronze);
}

article table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
  /* M-002: long unbreakable Finnish cell strings overflowed the 360px
     mobile viewport with default table-layout:auto. Lock to fixed +
     allow word-break so cells reflow inside the 100% parent. */
  table-layout: fixed;
  word-break: break-word;
}

article thead th {
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-ink);
  padding: 10px 12px;
}

article tbody td {
  border-bottom: 1px solid var(--color-rule);
  padding: 10px 12px;
  vertical-align: top;
}

article tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

article .definition {
  background: var(--color-cream);
  border-left: 4px solid var(--color-charcoal);
  padding: 20px 24px;
  margin: 24px 0 32px;
  border-radius: 0 6px 6px 0;
}

article .definition p { margin: 0; }

article .stat-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

article .stat {
  background: white;
  border: 1px solid var(--color-rule);
  padding: 20px;
  border-radius: 6px;
}

article .stat .number {
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.8rem;
  letter-spacing: -0.01em;
  display: block;
  margin-bottom: 4px;
}

article .stat .caption {
  font-size: 13px;
  color: var(--color-ink-muted);
}

article .cta-card {
  background: var(--color-charcoal);
  color: var(--color-cream);
  padding: 28px 32px;
  border-radius: 8px;
  margin: 48px 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

article .cta-card p {
  margin: 0;
  font-size: 17px;
  max-width: 40ch;
  color: var(--color-cream);
}

article .cta-card a {
  background: var(--color-cream);
  color: var(--color-ink);
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 15px;
  white-space: nowrap;
  transition: background 150ms;
}

article .cta-card a:hover {
  background: var(--color-bronze);
  color: var(--color-cream);
}

article .breadcrumb {
  font-size: 13px;
  color: var(--color-ink-muted);
  margin-bottom: 24px;
}

article .breadcrumb a {
  color: var(--color-ink-muted);
  text-decoration: none;
}

article .breadcrumb a:hover {
  color: var(--color-bronze);
}

article .sources {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--color-rule);
  font-size: 14px;
  color: var(--color-ink-muted);
}

article .sources h2 {
  font-size: 1.1rem;
  margin: 0 0 12px;
  font-family: 'Inter Tight', sans-serif;
  font-weight: 600;
  letter-spacing: 0;
}

article .sources ol {
  padding-left: 22px;
}

article .sources li {
  margin-bottom: 8px;
}

article .updated {
  font-size: 13px;
  color: var(--color-ink-muted);
  margin-top: 32px;
}

article .related {
  margin: 56px 0 24px;
  padding: 24px;
  background: var(--color-cream);
  border-radius: 8px;
}

article .related h2 {
  font-size: 1.1rem;
  margin: 0 0 12px;
  font-family: 'Inter Tight', sans-serif;
  font-weight: 600;
}

article .related ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

article .related li {
  margin-bottom: 6px;
}

footer.site-footer {
  background: var(--color-charcoal);
  color: var(--color-cream-subtle);
  padding: 32px 0;
  margin-top: 64px;
}

footer.site-footer .inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  font-size: 13px;
}

footer.site-footer a {
  color: var(--color-cream-muted);
  text-decoration: none;
}

footer.site-footer a:hover {
  color: var(--color-bronze);
}

@media (max-width: 640px) {
  article { padding: 40px 20px 64px; }
  article h1 { font-size: 2rem; }
  article .lead { font-size: 17px; }
  article .cta-card { padding: 22px; }
}