:root {
  --bg: #0f1117;
  --panel: #161922;
  --text: #d6dae2;
  --muted: #8b93a3;
  --accent: #4ec9b0;
  --accent2: #dcdcaa;
  --blue: #4fc1ff;
  --border: #232733;
  --code-bg: #1b1f2a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.layout { display: flex; min-height: 100vh; }

nav.sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 24px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

nav.sidebar .brand {
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 4px;
}

nav.sidebar .tag { color: var(--muted); font-size: 13px; margin-bottom: 20px; }

nav.sidebar a {
  display: block;
  color: var(--text);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 14px;
}
nav.sidebar a:hover { background: var(--code-bg); text-decoration: none; }
nav.sidebar a.active { background: var(--code-bg); color: var(--accent); font-weight: 600; }
nav.sidebar a.repo {
  border: 1px solid var(--border);
  border-radius: 6px;
  text-align: center;
  margin: 0 0 18px;
  color: var(--accent);
  font-weight: 600;
}
nav.sidebar a.repo:hover { background: var(--accent); color: var(--bg); text-decoration: none; }
nav.sidebar .group { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; margin: 18px 0 6px; }

main {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 48px 120px;
}

h1 { font-size: 34px; color: #fff; border-bottom: 1px solid var(--border); padding-bottom: 12px; }
h2 { font-size: 26px; color: #fff; margin-top: 48px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
h3 { font-size: 19px; color: var(--accent2); margin-top: 32px; }
h4 { font-size: 16px; color: var(--accent); margin-top: 24px; }

p, li { color: var(--text); }
.muted { color: var(--muted); }

code {
  font-family: "JetBrains Mono", "Fira Code", Consolas, Monaco, monospace;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--accent2);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  overflow-x: auto;
}
pre code { background: none; padding: 0; color: var(--text); font-size: 13.5px; line-height: 1.55; }

table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; }
th, td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
th { background: var(--code-bg); color: var(--accent); }
tr:nth-child(even) td { background: rgba(255,255,255,0.015); }

.note {
  border-left: 3px solid var(--accent);
  background: rgba(78,201,176,0.07);
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin: 16px 0;
}

.kw { color: #569cd6; }
.typ { color: var(--accent); }
.str { color: #ce9178; }
.com { color: #6a9955; }
.fn { color: var(--accent2); }
.num { color: #b5cea8; }

hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

footer { color: var(--muted); font-size: 13px; margin-top: 60px; border-top: 1px solid var(--border); padding-top: 20px; }

@media (max-width: 800px) {
  .layout { flex-direction: column; }
  nav.sidebar { width: 100%; height: auto; position: static; }
  main { padding: 24px; }
}