:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-inset: #f0f3f6;
  --border: #d0d7de;
  --border-soft: #e4e8ec;
  --fg: #1f2328;
  --fg-muted: #656d76;
  --accent: #0969da;
  --accent-soft: #ddf4ff;
  --open: #1a7f37;
  --open-bg: #dafbe1;
  --closed: #8250df;
  --closed-bg: #fbefff;
  --code-bg: #f6f8fa;
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-soft: #161b22;
    --bg-inset: #010409;
    --border: #30363d;
    --border-soft: #21262d;
    --fg: #e6edf3;
    --fg-muted: #8b949e;
    --accent: #4493f8;
    --accent-soft: #121d2f;
    --open: #3fb950;
    --open-bg: #12261e;
    --closed: #ab7df8;
    --closed-bg: #1d1a2b;
    --code-bg: #161b22;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}

.wrap {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(120%) blur(6px);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 600; }
.brand:hover { text-decoration: none; }
.brand-mark {
  font-family: var(--mono);
  background: var(--fg);
  color: var(--bg);
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
}
.brand-name { font-size: 17px; }
.site-nav { display: flex; gap: 18px; font-size: 14px; }
.site-nav a { color: var(--fg-muted); }
.site-nav a:hover { color: var(--fg); text-decoration: none; }

main.wrap { padding-top: 28px; padding-bottom: 48px; min-height: 60vh; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 40px;
  font-size: 13px;
  color: var(--fg-muted);
}
.site-footer p { margin: 4px 0; }
.muted { color: var(--fg-muted); }

/* Hero / homepage */
.hero { text-align: center; padding: 20px 0 8px; }
.hero h1 { font-size: 32px; line-height: 1.2; margin: 0 0 10px; letter-spacing: -0.5px; }
.hero p { font-size: 17px; color: var(--fg-muted); margin: 0 auto; max-width: 620px; }
.hero .stats { margin-top: 14px; font-size: 14px; color: var(--fg-muted); }
.hero .stats b { color: var(--fg); }

/* Search controls */
.controls { margin: 26px 0 18px; }
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-box input {
  width: 100%;
  font-size: 16px;
  padding: 13px 16px 13px 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  font-family: inherit;
}
.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.search-box .icon {
  position: absolute;
  left: 15px;
  color: var(--fg-muted);
  pointer-events: none;
  font-size: 18px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin-top: 14px;
  font-size: 14px;
}
.filter-group { display: flex; align-items: center; gap: 6px; }
.filter-group label { color: var(--fg-muted); }
.filters select {
  font-family: inherit;
  font-size: 14px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
}
.seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.seg button {
  font-family: inherit;
  font-size: 14px;
  padding: 6px 12px;
  border: 0;
  background: var(--bg);
  color: var(--fg-muted);
  cursor: pointer;
  border-right: 1px solid var(--border);
}
.seg button:last-child { border-right: 0; }
.seg button[aria-pressed="true"] { background: var(--accent); color: #fff; }

.result-meta {
  font-size: 13px;
  color: var(--fg-muted);
  margin: 6px 2px 14px;
}

/* Issue list */
.issue-list { list-style: none; padding: 0; margin: 0; }
.issue-row {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 10px;
  transition: border-color 0.12s, background 0.12s;
}
.issue-row:hover { border-color: var(--border); background: var(--bg-soft); }
.issue-row a.issue-title { color: var(--fg); font-weight: 600; font-size: 16px; }
.issue-row a.issue-title:hover { color: var(--accent); text-decoration: none; }
.issue-row .row-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
  font-size: 13px;
  color: var(--fg-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
}
.badge.open { color: var(--open); background: var(--open-bg); }
.badge.closed { color: var(--closed); background: var(--closed-bg); }
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--fg-muted);
}

.empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--fg-muted);
}

.load-more {
  display: block;
  margin: 18px auto 0;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--fg);
  cursor: pointer;
}
.load-more:hover { background: var(--bg-inset); }

/* Issue detail page */
.issue-detail h1 {
  font-size: 26px;
  line-height: 1.3;
  margin: 6px 0 12px;
  letter-spacing: -0.3px;
}
.issue-detail .issue-sub {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: var(--fg-muted);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 20px;
}
.breadcrumb { font-size: 13px; color: var(--fg-muted); margin-bottom: 4px; }
.breadcrumb a { color: var(--fg-muted); }

.comment-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  margin: 14px 0;
  overflow: hidden;
}
.comment-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-soft);
  font-size: 13px;
  color: var(--fg-muted);
}
.comment-head .who { font-weight: 600; color: var(--fg); }
.comment-head .assoc {
  font-size: 11px;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0 7px;
  color: var(--fg-muted);
}
.comment-body, .issue-body { padding: 4px 16px; }

/* Markdown content */
.md { overflow-wrap: break-word; word-break: break-word; }
.md h2, .md h3, .md h4 { margin: 18px 0 8px; line-height: 1.3; }
.md h2 { font-size: 20px; }
.md h3 { font-size: 17px; }
.md p { margin: 10px 0; }
.md ul, .md ol { margin: 10px 0; padding-left: 24px; }
.md li { margin: 3px 0; }
.md code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 5px;
  border: 1px solid var(--border-soft);
}
.md pre {
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  margin: 12px 0;
}
.md pre code { background: none; border: 0; padding: 0; font-size: 13px; line-height: 1.5; }
.md blockquote {
  border-left: 3px solid var(--border);
  margin: 12px 0;
  padding: 2px 0 2px 14px;
  color: var(--fg-muted);
}
.md a { word-break: break-all; }

.answer-hint {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  margin: 16px 0;
}

.gh-cta {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
}

.related { margin-top: 36px; }
.related h2 { font-size: 18px; margin-bottom: 12px; }

/* Prose pages (about) */
.prose { max-width: 680px; }
.prose h1 { font-size: 28px; margin-bottom: 16px; }
.prose h2 { font-size: 20px; margin-top: 28px; }
.prose p, .prose li { color: var(--fg); }

@media (max-width: 600px) {
  .hero h1 { font-size: 26px; }
  .site-nav { gap: 12px; }
  .brand-name { display: none; }
}