:root {
  --bg: #ffffff;
  --surface: #f6f8fa;
  --border: #d0d7de;
  --border-muted: #e5e8ec;
  --text: #1f2328;
  --muted: #656d76;
  --accent: #0969da;
  --green: #1a7f37;
  --tag-bg: #ddf4ff;
  --tag-fg: #0969da;
  --code-bg: #f6f8fa;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
}

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

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 0;
}

.topbar-inner, .main {
  max-width: 1120px;
  margin: 0 auto;
}

.repo-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.repo-title .owner { color: var(--accent); font-weight: 400; }
.repo-title .sep { color: var(--muted); }
.repo-title .name { font-weight: 600; color: var(--accent); }

.badge {
  display: inline-block;
  padding: 1px 8px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: var(--bg);
}

.badge-lang {
  background: var(--tag-bg);
  color: var(--tag-fg);
  border-color: transparent;
}

.tabs {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}

.tab {
  padding: 8px 12px;
  color: var(--text);
  font-size: 13px;
  border-bottom: 2px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tab:hover { background: #eaeef2; text-decoration: none; border-radius: 6px 6px 0 0; }
.tab.active { font-weight: 600; border-bottom-color: #fd8c73; }
.count {
  background: rgba(175, 184, 193, 0.35);
  border-radius: 999px;
  padding: 0 6px;
  font-size: 11px;
  font-weight: 600;
}

.main { padding: 20px 24px 48px; }
.grid {
  display: grid;
  grid-template-columns: 1fr 270px;
  gap: 24px;
  align-items: start;
}

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 8px;
  flex-wrap: wrap;
}

.branch-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.clone-box {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 5px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
}

.box {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 20px;
  background: var(--bg);
}

.commit-bar {
  background: var(--surface);
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  flex-wrap: wrap;
}

.commit-msg { font-weight: 500; color: var(--text); }
.commit-meta { color: var(--muted); font-size: 12px; font-family: var(--font-mono); }

table.files {
  width: 100%;
  border-collapse: collapse;
}

table.files tr { border-top: 1px solid var(--border-muted); }
table.files tr:first-child { border-top: none; }
table.files tr:hover { background: var(--surface); }
table.files td { padding: 8px 16px; }
table.files td.icon { width: 28px; padding-right: 0; color: var(--muted); }
table.files td.fname { width: 28%; }
table.files td.fmsg { color: var(--muted); }
table.files td.fage { text-align: right; color: var(--muted); white-space: nowrap; font-size: 12px; }

.readme-hdr {
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 13px;
}

.readme-body { padding: 20px 24px; }
.readme-body h1 { margin-top: 0; font-size: 22px; border-bottom: 1px solid var(--border-muted); padding-bottom: 6px; }
.readme-body h2 { font-size: 17px; margin-top: 22px; border-bottom: 1px solid var(--border-muted); padding-bottom: 4px; }
.readme-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border-muted);
  border-radius: 6px;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.readme-body code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: var(--code-bg);
  padding: 2px 5px;
  border-radius: 4px;
}
.readme-body pre code { background: none; padding: 0; }

.side-section {
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-muted);
}
.side-section:last-child { border-bottom: none; }
.side-title { font-weight: 600; margin-bottom: 8px; font-size: 14px; }
.side-muted { color: var(--muted); font-size: 13px; }
.lang-bar {
  height: 8px;
  border-radius: 999px;
  overflow: hidden;
  display: flex;
  background: var(--surface);
  margin: 8px 0;
}
.lang-c { background: #555555; width: 82%; }
.lang-sh { background: #89e051; width: 18%; }

.issue-row {
  padding: 12px 16px;
  border-top: 1px solid var(--border-muted);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.issue-row:first-child { border-top: none; }
.issue-title { font-weight: 600; color: var(--text); }
.issue-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }

.footer {
  border-top: 1px solid var(--border-muted);
  margin-top: 32px;
  padding-top: 16px;
  color: var(--muted);
  font-size: 12px;
  display: flex;
  justify-content: space-between;
}