:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #24292f;
  --muted: #57606a;
  --border: #d0d7de;
  --subtle: #f6f8fa;
  --accent: #0969da;
  --code-bg: rgba(175, 184, 193, 0.2);
  --nav-bg: rgba(255, 255, 255, 0.86);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #c9d1d9;
    --muted: #8b949e;
    --border: #30363d;
    --subtle: #161b22;
    --accent: #58a6ff;
    --code-bg: rgba(110, 118, 129, 0.4);
    --nav-bg: rgba(13, 17, 23, 0.86);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 16px;
  line-height: 1.5;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
  padding: 12px 32px;
}

.brand {
  color: var(--fg);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 14px;
  line-height: 1;
}

.nav-links a:hover {
  color: var(--fg);
  background: var(--subtle);
  text-decoration: none;
}

.markdown-body {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px;
}

.markdown-body > :first-child {
  margin-top: 0;
}

.markdown-body > :last-child {
  margin-bottom: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 24px 0 16px;
  font-weight: 600;
  line-height: 1.25;
}

h1,
h2 {
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
}

h1 {
  font-size: 2em;
}

h2 {
  font-size: 1.5em;
}

h3 {
  font-size: 1.25em;
}

p,
blockquote,
ul,
ol,
dl,
table,
pre,
details {
  margin-top: 0;
  margin-bottom: 16px;
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

hr {
  height: 0.25em;
  padding: 0;
  margin: 24px 0;
  background-color: var(--border);
  border: 0;
}

blockquote {
  padding: 0 1em;
  color: var(--muted);
  border-left: 0.25em solid var(--border);
}

code,
kbd,
pre,
samp {
  font-family: ui-monospace, SFMono-Regular, SFMono, Consolas,
    "Liberation Mono", Menlo, monospace;
  font-size: 85%;
}

code {
  padding: 0.2em 0.4em;
  background-color: var(--code-bg);
  border-radius: 6px;
}

pre {
  padding: 16px;
  overflow: auto;
  background-color: var(--subtle);
  border-radius: 6px;
}

pre code {
  display: inline;
  padding: 0;
  overflow: visible;
  font-size: 100%;
  line-height: inherit;
  background: transparent;
  border: 0;
}

table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow: auto;
  border-spacing: 0;
  border-collapse: collapse;
}

th,
td {
  padding: 6px 13px;
  border: 1px solid var(--border);
}

tr {
  background-color: var(--bg);
  border-top: 1px solid var(--border);
}

tr:nth-child(2n) {
  background-color: var(--subtle);
}

@media (max-width: 767px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 12px 16px;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .nav-links a {
    padding: 6px 8px;
  }

  .markdown-body {
    padding: 24px 16px;
  }
}