/* ==========================================================================
   Blog — shared styles (Vibe Machine Learning)
   Aligns with main site design tokens.
   ========================================================================== */

:root {
  --bg-page: #0c0e10;
  --bg-page-subtle: radial-gradient(ellipse 100% 80% at 50% -20%, rgba(26, 35, 50, 0.35), transparent 50%), #0c0e10;
  --bg-card: #161a1e;
  --bg-elevated: #1c2025;
  --border: #2a2e33;
  --text: #eef0f2;
  --text-muted: #9aa0a6;
  --accent: #5aa3ff;
  --accent-hover: #7ab5ff;
  --radius: 10px;
  --radius-sm: 8px;
  --space: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.03);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(90, 163, 255, 0.08);
}

*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-page-subtle);
  background-attachment: fixed;
  margin: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Main content width
   ========================================================================== */

.blog-main {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-xl);
}

/* ==========================================================================
   Blog index: intro + cards
   ========================================================================== */

.blog-intro {
  margin-bottom: var(--space-xl);
}

.blog-intro__title {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.2;
}

.blog-intro__lead {
  margin: 0;
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.blog-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(90, 163, 255, 0.2);
}

.blog-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.blog-card__title a {
  color: var(--text);
  text-decoration: none;
}

.blog-card__title a:hover {
  color: var(--accent);
}

.blog-card__meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  letter-spacing: 0.01em;
}

.blog-card__excerpt {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.blog-card__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
}

.blog-card__link:hover {
  text-decoration: underline;
}

/* Connect / footer CTA */
.blog-connect {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.blog-connect__title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.blog-connect__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.9375rem;
}

.blog-connect__links a {
  color: var(--accent);
  text-decoration: none;
}

.blog-connect__links a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Article prose (single post)
   ========================================================================== */

.prose {
  color: var(--text);
  max-width: 65ch;
}

.prose h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text);
}

.prose .article-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  letter-spacing: 0.01em;
}

.prose .lead {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
}

.prose h2 {
  margin: var(--space-xl) 0 0.5rem;
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.prose h2:first-of-type {
  margin-top: var(--space-lg);
}

.prose h3 {
  margin: var(--space-lg) 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
}

.prose p {
  margin: 0 0 var(--space);
}

.prose ul, .prose ol {
  margin: 0 0 var(--space);
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.25rem;
}

.prose a {
  color: var(--accent);
  text-decoration: none;
}

.prose a:hover {
  text-decoration: underline;
}

.prose .highlight {
  background: var(--bg-elevated);
  border-left: 4px solid var(--accent);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.prose .code-block {
  background: var(--bg-elevated);
  padding: var(--space);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: ui-monospace, monospace;
  font-size: 0.875rem;
  margin: var(--space) 0;
  border: 1px solid var(--border);
}

.prose .author-bio {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* Resource list / guides */
.prose .resource-section {
  margin-bottom: var(--space-xl);
}

.prose .resource-section h2 {
  margin-top: var(--space-xl);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.prose .resource-section .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 600;
}

.prose .resource-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 500;
}

.prose .highlight span.highlight {
  background: transparent;
  border: none;
  padding: 0;
  font-weight: 600;
  color: var(--accent);
}

.prose .conclusion {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

/* ==========================================================================
   Blog footer
   ========================================================================== */

.blog-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.blog-footer p {
  margin: 0;
}