/* Shared stylesheet for the static blog pages under /blog.
   These pages are plain HTML served from public/ — no React, no build step. */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #1b5e20;
  --primary-dark: #154a19;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --bg-soft: #f9fafb;
  --callout-bg: #e2f0e4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #8fd4a8;
    --primary-dark: #a9dfbb;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --border: #374151;
    --bg: #111827;
    --bg-soft: #1f2937;
    --callout-bg: #1f3226;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg);
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 1rem; }

nav { border-bottom: 1px solid var(--border); padding: 0.875rem 0; }
.nav-content { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.logo { font-size: 1.25rem; font-weight: 700; color: var(--primary); text-decoration: none; white-space: nowrap; }
.nav-links { display: flex; gap: 1.25rem; align-items: center; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.875rem; }
.nav-links a:hover { color: var(--primary); }

.hero { padding: 3.5rem 0 2rem; text-align: center; }
.hero h1 { font-size: 2.5rem; margin-bottom: 1rem; }
.hero p { font-size: 1.25rem; color: var(--text-secondary); max-width: 620px; margin: 0 auto; }

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 3rem 0 4rem;
}
.post-card {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--bg);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.post-card:hover { box-shadow: 0 4px 16px rgba(0, 0, 0, 0.09); border-color: var(--primary); }
.post-tag { font-size: 0.75rem; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: 0.05em; }
.post-card h2 { font-size: 1.125rem; color: var(--text-primary); line-height: 1.4; }
.post-card p { font-size: 0.9375rem; color: var(--text-secondary); flex: 1; }
.post-meta { font-size: 0.8125rem; color: var(--text-secondary); }

.article-hero { padding: 3rem 0 2rem; border-bottom: 1px solid var(--border); }
.article-tag { font-size: 0.75rem; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 0.75rem; display: block; }
.article-hero h1 { font-size: 2.25rem; line-height: 1.25; max-width: 720px; margin-bottom: 1rem; }
.article-meta { font-size: 0.875rem; color: var(--text-secondary); }

.article-body { max-width: 720px; padding: 2.5rem 0 4rem; }
.article-body h2 { font-size: 1.5rem; margin: 2rem 0 0.75rem; }
.article-body h3 { font-size: 1.125rem; margin: 1.5rem 0 0.5rem; }
.article-body p { margin-bottom: 1.25rem; font-size: 1.0625rem; }
.article-body ul, .article-body ol { margin: 0.75rem 0 1.25rem 1.5rem; }
.article-body li { margin-bottom: 0.5rem; font-size: 1.0625rem; }
.article-body a { color: var(--primary); }
.article-body strong { color: var(--text-primary); }
.article-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

.callout {
  background: var(--callout-bg);
  border-left: 4px solid var(--primary);
  padding: 1rem 1.25rem;
  border-radius: 0 0.5rem 0.5rem 0;
  margin: 1.5rem 0;
}
.callout p { margin: 0; font-size: 1rem; }

.compare-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.9375rem; }
.compare-table th { background: var(--bg-soft); padding: 0.625rem 0.875rem; text-align: left; border: 1px solid var(--border); font-weight: 600; }
.compare-table td { padding: 0.625rem 0.875rem; border: 1px solid var(--border); }

.section-heading { padding: 2rem 0 0; }
.section-heading h2 { font-size: 1.375rem; }
.section-heading p { color: var(--text-secondary); margin-top: 0.25rem; }

footer { border-top: 1px solid var(--border); padding: 2rem 0; text-align: center; color: var(--text-secondary); font-size: 0.875rem; }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.5rem; margin-bottom: 1rem; }
.footer-nav a { color: var(--text-secondary); text-decoration: none; }
.footer-nav a:hover { color: var(--primary); }

@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  .article-hero h1 { font-size: 1.75rem; }
  .posts-grid { grid-template-columns: 1fr; }
}