/* ==========================================================================
   theme.css - shared design tokens, nav bar, and dark mode for the whole site
   Used by: index.html, blog.html, and every generated blog/<slug>.html page
   ========================================================================== */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f6f8;
  --text: #150c21;
  --muted: #8a8f98;
  --link: #146ebe;
  --link-hover: #0d5aa0;
  --border: #e6e6ea;
  --code-bg: #f4f4f6;
  --shadow: rgba(20, 12, 33, 0.06);
  --tag-bg: #f0f1f4;
  --tag-text: #52586a;
}

html.dark {
  --bg: #15161b;
  --bg-alt: #1c1d24;
  --text: #e7e5ef;
  --muted: #8f93a1;
  --link: #6fb3f4;
  --link-hover: #9ccdf7;
  --border: #2c2d36;
  --code-bg: #1e1f27;
  --shadow: rgba(0, 0, 0, 0.35);
  --tag-bg: #23242c;
  --tag-text: #b7bac4;
}

html { background: var(--bg); }
body { background: var(--bg); color: var(--text); }

body, .site-nav, .card, a {
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.site-nav {
  width: 100%;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-nav-inner {
  max-width: 60em;
  margin: 0 auto;
  padding: 0.9em 1.5em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: 'Asap', roboto, sans-serif;
}

.site-brand { color: var(--text) !important; font-weight: 600; font-size: 1.05em; border: none !important; }
.site-brand:hover { color: var(--link) !important; }

.site-nav-links { display: flex; align-items: center; gap: 1.6em; }

.nav-link { color: var(--muted); font-size: 0.95em; font-weight: 500; border: none !important; }
.nav-link:hover, .nav-link.active { color: var(--text) !important; }

.nav-right { display: flex; align-items: center; gap: 1em; }

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
  border-radius: 6px;
  width: 2.1em;
  height: 2.1em;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.95em;
  line-height: 1;
}

.theme-toggle:hover { border-color: var(--muted); }

html.dark .theme-icon-sun { display: none; }
html:not(.dark) .theme-icon-moon { display: none; }

.tag {
  display: inline-block;
  font-size: 0.78em;
  font-weight: 500;
  color: var(--tag-text);
  background: var(--tag-bg);
  border-radius: 4px;
  padding: 0.2em 0.6em;
  margin: 0 0.4em 0.4em 0;
  border: none !important;
}

.tag:hover { color: var(--link) !important; }
.tag.is-active { color: #fff !important; background: var(--link); }

@media (max-width: 700px) {
  .site-nav-inner { padding: 0.8em 1.2em; }
  .site-nav-links { gap: 1em; }
}