:root {
  line-height: 1.6;
  /* GitHub-like default (light) */
  --bg: #ffffff;
  --text: #24292f;
  --muted: #57606a;
  --link: #0969da;
  --border: #d0d7de;
}
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
}
.wrap { max-width: 960px; margin: 0 auto; padding: 1.25rem; }
header h1 a { text-decoration: none; color: inherit; }
.site-header { border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.brand { font-weight: 700; text-decoration: none; color: inherit; font-size: 1.15rem; }
.site-nav { display: flex; gap: .5rem; }
.site-nav a { text-decoration: none; color: inherit; padding: .35rem .6rem; border-radius: 999px; border: 1px solid transparent; }
.site-nav a:hover { border-color: var(--text); }
.site-nav a.active, .site-nav a[aria-current="page"] { border-color: var(--text); font-weight: 600; }
.post h1 { margin-bottom: 0; }
.meta { color: var(--muted); margin-top: .25rem; }
.post-cover { width: 100%; max-height: 360px; object-fit: cover; border-radius: 8px; margin: 0 0 .75rem; display: block; }
.post img { max-width: 100%; height: auto; }
.theme-btn {
  cursor: pointer;
  background: var(--bg);
  color: inherit;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .15rem .5rem;
}
.theme-btn:hover {
  border-color: var(--text);
}
.theme-btn:focus {
  outline: none;
  border-color: var(--text);
}
.post-list { list-style: none; padding: 0; }
.post-list li { margin: .5rem 0; }
fieldset { border: 1px solid var(--border); }
fieldset label { margin-right: 1rem; }
input[type='text'], input[type='url'] { width: 100%; max-width: 520px; }

/* Theme mappings to common giscus themes */
/* Light family */
[data-theme="light"],
[data-theme="light_tritanopia"] {
  --bg: #ffffff;
  --text: #24292f;
  --muted: #57606a;
  --link: #0969da;
  --border: #d0d7de;
}

/* Light high contrast */
[data-theme="light_high_contrast"] {
  --bg: #ffffff;
  --text: #0e1116;
  --muted: #343b43;
  --link: #0349b4;
  --border: #1f2328;
}

/* Dark family */
[data-theme="dark"],
[data-theme="dark_tritanopia"],
[data-theme="transparent_dark"] {
  --bg: #0d1117;
  --text: #c9d1d9;
  --muted: #8b949e;
  --link: #58a6ff;
  --border: #30363d;
}

/* Dark dimmed */
[data-theme="dark_dimmed"],
[data-theme="nolanlawson"] {
  --bg: #22272e;
  --text: #adbac7;
  --muted: #768390;
  --link: #539bf5;
  --border: #3d444d;
}

/* Dark high contrast */
[data-theme="dark_high_contrast"] {
  --bg: #0a0c10;
  --text: #f0f3f6;
  --muted: #a5b1bb;
  --link: #71b7ff;
  --border: #7a828e;
}

/* Dark no-border (matches giscus noborder_dark) */
[data-theme="noborder_dark"],
[data-theme="dark_no_border"] {
  --bg: #0d1117;
  --text: #c9d1d9;
  --muted: #8b949e;
  --link: #58a6ff;
  --border: transparent;
}

/* Follow OS color scheme when selected */
[data-theme="preferred_color_scheme"] {
  /* Light defaults already set in :root */
}
@media (prefers-color-scheme: dark) {
  [data-theme="preferred_color_scheme"] {
    --bg: #0d1117;
    --text: #c9d1d9;
    --muted: #8b949e;
    --link: #58a6ff;
    --border: #30363d;
  }
}

/* Links and borders */
a { color: var(--link); }
hr { border: 0; border-top: 1px solid var(--border); }

/* Hero */
.hero {
  padding: 2.5rem 0 1.5rem;
}
.hero .title { margin: 0 0 .5rem; font-size: 2rem; }
.hero .subtitle { color: var(--muted); margin: 0; }

/* Post grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.card-image-link { display: block; line-height: 0; }
.card-image {
  width: 100%; height: 180px; object-fit: cover; display: block;
  background: #eee;
}
.card.no-image .card-image { display: none; }
.card-content { padding: .9rem; }
.card-content h3 { margin: 0 0 .25rem; font-size: 1.1rem; }
.card-meta { color: var(--muted); font-size: .9rem; margin: 0 0 .5rem; }
.card-excerpt { margin: 0 0 .75rem; color: var(--text); }
.card-cta { color: var(--link); text-decoration: none; font-weight: 600; }
.card-cta:hover { text-decoration: underline; }

/* Tags */
.tags { margin-top: .5rem; }
.tag { display: inline-block; margin: 0 .35rem .35rem 0; padding: .15rem .5rem; border: 1px solid var(--border); border-radius: 999px; font-size: .85rem; color: var(--muted); text-decoration: none; }
.tag:hover { color: var(--text); border-color: var(--text); }

/* Byline */
.byline { display: flex; align-items: center; gap: .6rem; margin: 1rem 0 1.5rem; }
.byline img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.byline .who { font-size: .95rem; }
.byline .who a { color: inherit; text-decoration: none; }
.byline .who small { color: var(--muted); display: block; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 2rem; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: .75rem; }
.footer-cta { text-decoration: none; color: inherit; border: 1px solid var(--border); padding: .35rem .75rem; border-radius: 999px; font-weight: 600; }
.footer-cta:hover { border-color: var(--text); }