:root {
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --fg: #1f2328;
  --muted: #656d76;
  --border: #d0d7de;
  --border-subtle: #eaeef2;
  --link: #0969da;
  --code-bg: #f6f8fa;
  --accent-soft: #ddf4ff;
  --row-hover: #f6f8fa;
  --shadow: 0 1px 3px rgba(27, 31, 36, 0.08), 0 0 1px rgba(27, 31, 36, 0.12);
  --diff-add: #e6ffec;
  --diff-del: #ffebe9;
  --radius: 8px;
}

/* Explicit dark theme (chosen via the top-bar toggle, persisted in
   localStorage and applied by an inline script before first paint). */
:root[data-theme="dark"] {
  --bg: #0d1117;
  --bg-subtle: #161b22;
  --fg: #e6edf3;
  --muted: #8b949e;
  --border: #30363d;
  --border-subtle: #21262d;
  --link: #4493f8;
  --code-bg: #161b22;
  --accent-soft: #163356;
  --row-hover: #161b22;
  --shadow: 0 1px 3px rgba(1, 4, 9, 0.5), 0 0 1px rgba(1, 4, 9, 0.6);
  --diff-add: #12261e;
  --diff-del: #25171c;
}

/* Fallback for clients without JS: follow the OS preference when no
   explicit choice has been recorded on the document. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0d1117;
    --bg-subtle: #161b22;
    --fg: #e6edf3;
    --muted: #8b949e;
    --border: #30363d;
    --border-subtle: #21262d;
    --link: #4493f8;
    --code-bg: #161b22;
    --accent-soft: #163356;
    --row-hover: #161b22;
    --shadow: 0 1px 3px rgba(1, 4, 9, 0.5), 0 0 1px rgba(1, 4, 9, 0.6);
    --diff-add: #12261e;
    --diff-del: #25171c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-subtle);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(1.2);
}
.topbar a { color: var(--fg); }
.topbar .brand {
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.topbar .brand::before {
  content: "";
  display: inline-block;
  width: 1.1rem;
  height: 1.1rem;
  background: var(--link);
  -webkit-mask: no-repeat center / contain
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M15.7 7.3 8.7.3a1 1 0 0 0-1.4 0L5.8 1.8l1.9 1.9a1.2 1.2 0 0 1 1.5 1.5l1.8 1.8a1.2 1.2 0 1 1-.7.7L8.6 6a1.2 1.2 0 0 1-.3.2v4.3a1.2 1.2 0 1 1-1 0V6.2a1.2 1.2 0 0 1-.6-1.6L4.8 2.7.3 7.3a1 1 0 0 0 0 1.4l7 7a1 1 0 0 0 1.4 0l7-7a1 1 0 0 0 0-1.4Z'/%3E%3C/svg%3E");
  mask: no-repeat center / contain
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M15.7 7.3 8.7.3a1 1 0 0 0-1.4 0L5.8 1.8l1.9 1.9a1.2 1.2 0 0 1 1.5 1.5l1.8 1.8a1.2 1.2 0 1 1-.7.7L8.6 6a1.2 1.2 0 0 1-.3.2v4.3a1.2 1.2 0 1 1-1 0V6.2a1.2 1.2 0 0 1-.6-1.6L4.8 2.7.3 7.3a1 1 0 0 0 0 1.4l7 7a1 1 0 0 0 1.4 0l7-7a1 1 0 0 0 0-1.4Z'/%3E%3C/svg%3E");
}
.topbar .sep { color: var(--muted); }
.topbar .repo-nav { margin-left: auto; display: flex; gap: 0.25rem; }
.topbar .repo-nav a {
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  color: var(--muted);
}
.topbar .repo-nav a:hover { background: var(--row-hover); color: var(--fg); text-decoration: none; }
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0.55rem;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  color: var(--fg);
}
.theme-toggle:hover { border-color: var(--link); }
.theme-toggle.push { margin-left: auto; }

main { max-width: 1000px; margin: 0 auto; padding: 2rem 1.5rem; }
main:has(> .blame-scroll) { max-width: 1600px; }

h1 { font-size: 1.5rem; word-break: break-all; margin-top: 0; }
h2 { font-size: 1.15rem; }
.meta, .actions, .tags { color: var(--muted); font-size: 0.9rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.25rem 0.6rem; align-items: center; }
.actions a {
  font-size: 0.85rem;
  padding: 0.15rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
}
.actions a:hover { background: var(--row-hover); text-decoration: none; }
.tags a {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  margin: 0.1rem 0.15rem 0.1rem 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  background: var(--bg-subtle);
}
.tags a:hover { border-color: var(--link); text-decoration: none; }
.commit-notice {
  color: var(--muted);
  font-size: 0.85rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  display: inline-block;
}

.repo-list { list-style: none; padding: 0; margin: 1rem 0; }
.repo-list li {
  padding: 0;
  border: none;
}
.repo-list li a {
  display: block;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  font-weight: 600;
  transition: border-color 0.1s ease, background 0.1s ease;
}
.repo-list li a::before { content: "\1F4C1"; margin-right: 0.5rem; }
.repo-list li a:hover { border-color: var(--link); background: var(--row-hover); text-decoration: none; }

table { width: 100%; border-collapse: collapse; }
table.tree, table.log {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 1rem;
}
table.tree td, table.log td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}
table.tree tr:last-child td, table.log tr:last-child td { border-bottom: none; }
table.tree tr:hover td, table.log tr:hover td { background: var(--row-hover); }
table.tree .size, table.log .date, table.log .author { color: var(--muted); white-space: nowrap; }
table.tree .size { text-align: right; }
table.tree .name a.dir::before { content: "\1F4C1"; margin-right: 0.4rem; }

.log-controls, .tree-controls { margin: 0 0 0.25rem; }
.log-toggle, .view-toggle {
  font-size: 0.85rem;
  color: var(--fg);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: border-color 0.1s ease, color 0.1s ease;
}
.log-toggle:hover, .view-toggle:hover { border-color: var(--link); }
.log-toggle[aria-pressed="true"], .view-toggle[aria-pressed="true"] { border-color: var(--link); color: var(--link); }
.commit-body { margin: 0.5rem 0 0; white-space: pre-wrap; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; color: var(--muted); }
.dir { font-weight: 600; }
.submodule { color: var(--muted); }

.tree-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 0.75rem; margin-top: 1rem; }
.tree-grid[hidden] { display: none; }
.tree-grid .tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  word-break: break-word;
  color: var(--fg);
  transition: border-color 0.1s ease, background 0.1s ease;
}
a.tile:hover { border-color: var(--link); background: var(--row-hover); text-decoration: none; }
.tree-grid .tile-icon { font-size: 1.8rem; line-height: 1; }
.tree-grid .tile-name { font-size: 0.85rem; }
.tree-grid img.thumb { max-width: 100%; max-height: 120px; object-fit: contain; border-radius: 4px; }

pre.code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
}
pre.code code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; }
.hljs { background: transparent; }

.checkout {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  margin-top: 1.5rem;
  background: var(--bg-subtle);
  box-shadow: var(--shadow);
}
.checkout h2 { font-size: 1rem; margin: 0 0 0.75rem; }
.checkout .clone-line { margin: 0.4rem 0; }
.checkout .clone-label { display: inline-block; width: 5rem; color: var(--muted); font-size: 0.85rem; }
.checkout code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.25rem 0.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
}

.readme {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  margin-top: 1.5rem;
  box-shadow: var(--shadow);
}
.readme > :first-child { margin-top: 0; }
.readme h1, .readme h2 { border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.3rem; }
.readme pre { background: var(--code-bg); padding: 1rem; border-radius: var(--radius); overflow-x: auto; }
.readme code { background: var(--code-bg); padding: 0.15rem 0.35rem; border-radius: 4px; font-size: 0.9em; }
.readme pre code { background: none; padding: 0; }
.readme img { max-width: 100%; }
.readme table { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 1rem 0; }
.readme th, .readme td { padding: 0.4rem 0.75rem; border: 1px solid var(--border-subtle); }
.readme blockquote { margin: 1rem 0; padding: 0 1rem; color: var(--muted); border-left: 3px solid var(--border); }

.blame-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table.blame { width: 100%; border-collapse: collapse; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.82rem; }
table.blame td { padding: 0 0.5rem; border: none; vertical-align: top; white-space: nowrap; }
table.blame tr:hover td { background: var(--row-hover); }
table.blame .commit { color: var(--link); }
table.blame .author { color: var(--muted); }
table.blame .author span { display: inline-block; max-width: 12rem; overflow: hidden; text-overflow: ellipsis; vertical-align: bottom; }
table.blame .date { color: var(--muted); }
table.blame .lineno { color: var(--muted); text-align: right; user-select: none; }
table.blame .line { width: 100%; }
table.blame .line pre { margin: 0; white-space: pre; }

.log .msg { width: 100%; }
.binary { color: var(--muted); }
.lang-detected { color: var(--muted); font-size: 0.8rem; margin-top: 0.35rem; }
.fileimg img { max-width: 100%; height: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--code-bg); }

table.tree .status { font-family: ui-monospace, monospace; color: var(--muted); width: 1.5rem; }
table.tree .before { margin-left: 0.5rem; font-size: 0.8rem; color: var(--muted); }

.diff {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  margin-top: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
}
.diff > div { white-space: pre; padding: 0 0.5rem; min-height: 1.2em; }
.diff .d-add { background: var(--diff-add); }
.diff .d-del { background: var(--diff-del); }
.diff .d-hunk { background: var(--bg-subtle); color: var(--muted); }
.diff .d-file { background: var(--bg-subtle); font-weight: 600; }

:root[data-theme="dark"] .hljs { color: var(--fg); }
:root[data-theme="dark"] .hljs-doctag, :root[data-theme="dark"] .hljs-keyword,
:root[data-theme="dark"] .hljs-meta .hljs-keyword, :root[data-theme="dark"] .hljs-template-tag,
:root[data-theme="dark"] .hljs-template-variable, :root[data-theme="dark"] .hljs-type,
:root[data-theme="dark"] .hljs-variable.language_ { color: #ff7b72; }
:root[data-theme="dark"] .hljs-title, :root[data-theme="dark"] .hljs-title.class_,
:root[data-theme="dark"] .hljs-title.class_.inherited__, :root[data-theme="dark"] .hljs-title.function_ { color: #d2a8ff; }
:root[data-theme="dark"] .hljs-attr, :root[data-theme="dark"] .hljs-attribute,
:root[data-theme="dark"] .hljs-literal, :root[data-theme="dark"] .hljs-meta,
:root[data-theme="dark"] .hljs-number, :root[data-theme="dark"] .hljs-operator,
:root[data-theme="dark"] .hljs-selector-attr, :root[data-theme="dark"] .hljs-selector-class,
:root[data-theme="dark"] .hljs-selector-id, :root[data-theme="dark"] .hljs-variable { color: #79c0ff; }
:root[data-theme="dark"] .hljs-meta .hljs-string, :root[data-theme="dark"] .hljs-regexp,
:root[data-theme="dark"] .hljs-string { color: #a5d6ff; }
:root[data-theme="dark"] .hljs-built_in, :root[data-theme="dark"] .hljs-symbol { color: #ffa657; }
:root[data-theme="dark"] .hljs-code, :root[data-theme="dark"] .hljs-comment,
:root[data-theme="dark"] .hljs-formula { color: #8b949e; }
:root[data-theme="dark"] .hljs-name, :root[data-theme="dark"] .hljs-quote,
:root[data-theme="dark"] .hljs-selector-pseudo, :root[data-theme="dark"] .hljs-selector-tag { color: #7ee787; }
:root[data-theme="dark"] .hljs-subst { color: #e6edf3; }
:root[data-theme="dark"] .hljs-section { color: #1f6feb; font-weight: 700; }
:root[data-theme="dark"] .hljs-bullet { color: #f2cc60; }
:root[data-theme="dark"] .hljs-emphasis { color: #e6edf3; font-style: italic; }
:root[data-theme="dark"] .hljs-strong { color: #e6edf3; font-weight: 700; }
:root[data-theme="dark"] .hljs-addition { color: #aff5b4; background-color: #033a16; }
:root[data-theme="dark"] .hljs-deletion { color: #ffdcd7; background-color: #67060c; }