:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-dim: #5a5a5a;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e5e5e0;
  --code-bg: #f3f3ee;
  --max-width: 760px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 18px;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
  background: rgba(255,255,255,0.85);
}
.nav { display: flex; justify-content: space-between; align-items: center; max-width: 1100px; }
.brand { font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; }
.nav-links a {
  margin-left: 20px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
}
.nav-links a:hover { color: var(--accent); }

/* Hero */
.hero {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}
.hero h1 { font-size: 42px; margin: 0 0 12px; letter-spacing: -0.02em; }
.tagline { font-size: 20px; color: var(--text-dim); margin: 0; }

/* Hero image */
.hero-figure {
  margin: 24px 0 0;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.hero-figure img {
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: cover;
}
.hero-figure figcaption {
  font-size: 12px;
  color: var(--text-dim);
  text-align: right;
  padding: 6px 2px 0;
}
.hero-figure figcaption a { color: var(--text-dim); text-decoration: underline; }

/* Article */
.article-header { padding: 40px 0 20px; border-bottom: 1px solid var(--border); margin-bottom: 32px; }
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 600;
  font-size: 12px;
  margin-bottom: 12px;
}
.article-header h1 { font-size: 38px; line-height: 1.2; margin: 0 0 16px; letter-spacing: -0.02em; }
.article-meta {
  display: flex; gap: 8px;
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 20px;
}
.lede { font-size: 20px; color: var(--text-dim); line-height: 1.6; }

.article-body h2 { font-size: 28px; margin-top: 48px; margin-bottom: 16px; letter-spacing: -0.01em; }
.article-body h3 { font-size: 22px; margin-top: 32px; margin-bottom: 12px; }
.article-body p { margin: 18px 0; }
.article-body a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.article-body a:hover { color: var(--accent-hover); }
.article-body ul, .article-body ol { padding-left: 24px; }
.article-body li { margin: 8px 0; }
.article-body strong { color: var(--text); }
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 20px;
  margin: 24px 0;
  color: var(--text-dim);
  background: var(--surface);
}
.article-body code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.article-body pre {
  background: var(--code-bg);
  padding: 16px;
  overflow-x: auto;
  border-radius: 6px;
}
.article-body pre code { background: transparent; padding: 0; }
.article-body table { border-collapse: collapse; width: 100%; margin: 24px 0; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-body th { background: var(--surface); font-weight: 600; }
.article-body hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

/* FAQ */
.faq { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.faq h2 { font-size: 26px; margin-bottom: 20px; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 10px 0;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: 16px; }
.faq p { margin: 12px 0 0; color: var(--text-dim); }

/* Affiliate CTAs */
.aff-cta {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 16px;
}
.aff-cta strong { display: block; margin-bottom: 6px; }
.aff-cta .btn {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 16px;
  background: var(--accent);
  color: white;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}
.aff-cta .btn:hover { background: var(--accent-hover); color: white; }

.disclosure-banner {
  font-size: 13px;
  color: var(--text-dim);
  padding: 10px 14px;
  background: var(--code-bg);
  border-radius: 6px;
  margin: 20px 0;
  border-left: 3px solid var(--border);
}

/* Card list (related + index) */
.card-list { list-style: none; padding: 0; display: grid; gap: 16px; grid-template-columns: 1fr 1fr; margin: 20px 0; }
@media (max-width: 640px) { .card-list { grid-template-columns: 1fr; } }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.15s, transform 0.15s;
}
.card a { display: block; color: inherit; text-decoration: none; }
.card.has-thumb a { padding: 0; }
.card:not(.has-thumb) a { padding: 18px; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card .thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  background-color: var(--code-bg);
  border-top-left-radius: 7px;
  border-top-right-radius: 7px;
}
.card .card-body { padding: 16px 18px 18px; }
.card strong { display: block; font-size: 17px; margin: 6px 0 8px; }
.card p { margin: 0; font-size: 14px; color: var(--text-dim); line-height: 1.5; }
.card .meta { font-size: 12px; color: var(--text-dim); margin-top: 10px; }

.related { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.related h2 { font-size: 22px; margin-bottom: 16px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 30px 0 60px;
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
}
.site-footer p { margin: 6px 0; }
.disclosure { font-size: 12px; color: var(--text-dim); }

/* Article grid on index */
.article-grid h2 { font-size: 24px; margin-bottom: 20px; }