/* ==========================================================================
   FlowVista — Shared Blog Stylesheet
   Used by every /blog/* page. Same design system as guides.css.
   ========================================================================== */

/* ─── CSS Variables ─────────────────────────────────────────────────────── */
:root,
[data-theme='light'] {
  --surface: #faf9f7;
  --surface-mid: #f0eeeb;
  --surface-raised: #eeecea;
  --surface-card: #ffffff;
  --surface-card-alt: #f7f6f4;
  --on-surface: #0d1117;
  --on-surface-sec: #4b5563;
  --on-surface-muted: #6b7280;
  --border: rgba(0, 0, 0, 0.08);
  --border-light: rgba(0, 0, 0, 0.04);
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-text: #0a7c72;
  --primary-light: #f0fdfa;
  --primary-glow: rgba(13, 148, 136, 0.06);
  --primary-border: rgba(13, 148, 136, 0.18);
  --shadow-sm: 0 1px 3px rgba(13, 17, 23, 0.05), 0 4px 16px -2px rgba(13, 17, 23, 0.04);
  --shadow-md: 0 2px 8px rgba(13, 17, 23, 0.07), 0 12px 32px -4px rgba(13, 17, 23, 0.06);
}
[data-theme='dark'] {
  --surface: #0a0f1a;
  --surface-mid: #0e1525;
  --surface-raised: #111827;
  --surface-card: #151d2e;
  --surface-card-alt: #1a2332;
  --on-surface: #f0f2f5;
  --on-surface-sec: #9ca3af;
  --on-surface-muted: #6b7280;
  --border: rgba(255, 255, 255, 0.07);
  --border-light: rgba(255, 255, 255, 0.04);
  --primary: #0d9488;
  --primary-dark: #0f766e;
  --primary-text: #0d9488;
  --primary-light: rgba(13, 148, 136, 0.12);
  --primary-glow: rgba(13, 148, 136, 0.18);
  --primary-border: rgba(13, 148, 136, 0.22);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 4px 16px -2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35), 0 12px 40px -4px rgba(0, 0, 0, 0.3);
}

/* ─── Reset ─────────────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  font-family:
    'Figtree',
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  background: var(--surface);
  color: var(--on-surface);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ─── Nav ───────────────────────────────────────────────────────────────── */
.blog-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  background: var(--surface-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.blog-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.3px;
  color: var(--on-surface);
  text-decoration: none;
}
.blog-logo img {
  width: 26px;
  height: 26px;
  border-radius: 6px;
}
.blog-logo span span {
  color: var(--primary);
}
.blog-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.blog-back {
  font-size: 13px;
  font-weight: 500;
  color: var(--on-surface-sec);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  transition:
    background 140ms ease,
    color 140ms ease;
}
.blog-back:hover {
  background: var(--surface-mid);
  color: var(--on-surface);
}
.blog-theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 9px;
  cursor: pointer;
  color: var(--on-surface-muted);
  transition:
    border-color 140ms ease,
    color 140ms ease;
  display: flex;
  align-items: center;
}
.blog-theme-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.blog-theme-toggle svg {
  width: 16px;
  height: 16px;
}
[data-theme='light'] .sun-icon {
  display: none;
}
[data-theme='dark'] .moon-icon {
  display: none;
}

/* ─── Blog Post Layout ──────────────────────────────────────────────────── */
.blog {
  max-width: 740px;
  margin: 48px auto;
  padding: 0 24px 96px;
}
.blog-breadcrumb {
  font-size: 13px;
  color: var(--on-surface-muted);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.blog-breadcrumb a {
  color: var(--on-surface-muted);
  text-decoration: none;
  transition: color 120ms ease;
}
.blog-breadcrumb a:hover {
  color: var(--primary);
}
.blog-breadcrumb-sep {
  opacity: 0.4;
}

/* ─── Blog Post Hero ────────────────────────────────────────────────────── */
.blog-hero {
  margin-bottom: 40px;
}
.blog-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--primary-text);
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 5px 12px;
  border-radius: 6px;
  margin-bottom: 18px;
}
.blog h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -1.2px;
  line-height: 1.12;
  margin: 0 0 16px;
}
.blog-meta {
  font-size: 13.5px;
  color: var(--on-surface-muted);
}
.blog-meta time {
  font-weight: 500;
}

/* ─── Blog Post Content ─────────────────────────────────────────────────── */
.blog h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 48px 0 16px;
  line-height: 1.2;
}
.blog h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin: 32px 0 12px;
}
.blog p {
  margin: 0 0 18px;
  font-size: 16px;
  color: var(--on-surface-sec);
}
.blog ul,
.blog ol {
  margin: 0 0 20px;
  padding-left: 24px;
  color: var(--on-surface-sec);
  font-size: 16px;
}
.blog li {
  margin-bottom: 8px;
}
.blog a {
  color: var(--primary-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.blog a:hover {
  color: var(--primary-dark);
}
.blog strong {
  color: var(--on-surface);
  font-weight: 600;
}
.blog blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--primary);
  background: var(--primary-light);
  border-radius: 0 10px 10px 0;
  color: var(--on-surface-sec);
  font-size: 15px;
}

/* ─── Callout Boxes ─────────────────────────────────────────────────────── */
.blog-callout {
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: 12px;
  padding: 20px 22px;
  margin: 28px 0;
}
.blog-callout-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: var(--primary-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.blog-callout p {
  font-size: 14.5px;
  margin: 0;
}

/* ─── Related Posts ─────────────────────────────────────────────────────── */
.blog-related {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.blog-related h2 {
  font-size: 20px;
  margin: 0 0 20px;
}
.blog-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.blog-related-card {
  display: block;
  padding: 18px 20px;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  color: var(--on-surface);
  font-weight: 500;
  font-size: 15px;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}
.blog-related-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

/* ─── Footer ────────────────────────────────────────────────────────────── */
.blog-footer {
  text-align: center;
  padding: 40px 24px;
  font-size: 13px;
  color: var(--on-surface-muted);
  border-top: 1px solid var(--border);
}
.blog-footer a {
  color: var(--on-surface-muted);
  text-decoration: none;
  transition: color 120ms ease;
}
.blog-footer a:hover {
  color: var(--primary);
}

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .blog-nav {
    padding: 14px 18px;
  }
  .blog {
    padding: 0 18px 64px;
    margin-top: 32px;
  }
  .blog h1 {
    font-size: 28px;
  }
  .blog-related-grid {
    grid-template-columns: 1fr;
  }
}