/* BokiBook Blog — shared stylesheet for /blog/* pages.
   Palette/typography intentionally mirrors web/index.html and web/landing_page.html
   so the blog feels like the same site, without duplicating this block into every
   article file. See .claude/skills/ブログ記事/SKILL.md for how this fits together. */

:root {
  --primary: #2e7d32;
  --primary-dark: #1b5e20;
  --primary-light: #e8f5e9;
  --accent: #f57f17;
  --accent-hover: #e65100;
  --text: #212121;
  --text-muted: #616161;
  --bg: #f9fbf9;
  --card-bg: #ffffff;
  --border: #e0e0e0;
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.7;
}

a {
  color: inherit;
}

/* Header */
header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  color: var(--primary-dark);
  text-decoration: none;
}

.logo-sub {
  font-size: 11px;
  font-weight: 700;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 6px;
  margin-left: 6px;
}

.nav-cta {
  background-color: var(--primary);
  color: #fff;
  padding: 8px 18px;
  border-radius: 20px;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: background 0.2s;
}

.nav-cta:hover {
  background-color: var(--primary-dark);
}

/* Page-level containers */
.blog-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 20px 90px;
}

.blog-container.wide {
  max-width: 1000px;
}

.blog-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.blog-title {
  font-size: clamp(24px, 4.5vw, 36px);
  font-weight: 900;
  color: var(--primary-dark);
  line-height: 1.4;
  margin-bottom: 16px;
}

.blog-lede {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.blog-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* Track intro cards (used on /blog/index.html) */
.track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 32px 0 48px;
}

.track-card {
  display: block;
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  text-decoration: none;
  transition: box-shadow 0.2s, transform 0.2s;
}

.track-card:hover {
  box-shadow: 0 6px 20px rgba(46, 125, 50, 0.12);
  transform: translateY(-2px);
}

.track-card h3 {
  font-size: 18px;
  font-weight: 900;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.track-card p {
  font-size: 14px;
  color: var(--text-muted);
}

/* Article list cards — rendered by scripts/regen_blog_index.sh between
   <!-- ARTICLES:START --> / <!-- ARTICLES:END --> markers. Keep this class
   structure in sync with that script. */
.article-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-card {
  display: block;
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  text-decoration: none;
  transition: box-shadow 0.2s;
}

.article-card:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
}

.article-card .article-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.article-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 6px;
}

.article-card p {
  font-size: 14px;
  color: var(--text-muted);
}

.blog-empty-note {
  color: var(--text-muted);
  font-size: 14px;
  padding: 24px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  text-align: center;
}

/* Article body typography (used on individual article pages) */
.article-body h2 {
  font-size: 22px;
  font-weight: 900;
  color: var(--primary-dark);
  margin: 40px 0 16px;
}

.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 12px;
}

.article-body p {
  font-size: 16px;
  margin-bottom: 18px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 18px 24px;
}

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

.article-body img {
  max-width: 100%;
  border-radius: 10px;
  margin: 20px 0;
}

/* In-article CTA block */
.article-cta {
  background-color: var(--primary-light);
  border-radius: 12px;
  padding: 28px 24px;
  text-align: center;
  margin: 40px 0;
}

.article-cta p {
  margin-bottom: 16px;
  font-weight: 700;
  color: var(--primary-dark);
}

.article-cta .cta-btn-main {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 900;
  padding: 12px 28px;
  border-radius: 24px;
  text-decoration: none;
  transition: background 0.2s;
}

.article-cta .cta-btn-main:hover {
  background-color: var(--accent-hover);
}

/* Footer */
footer {
  background-color: #1b5e20;
  color: #fff;
  padding: 40px 20px;
  text-align: center;
  font-size: 13px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #a5d6a7;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .logo-sub {
    display: none;
  }
  .nav-container {
    padding: 10px 16px;
  }
  .logo {
    font-size: 18px;
  }
  .blog-container {
    padding: 40px 16px 60px;
  }
}