:root {
  --bg: #0e1117;
  --bg-2: #161b22;
  --bg-3: #1c2230;
  --border: #2a3140;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-2: #7ee787;
  --warn: #f85149;
  --mark: #facc15;
  --code-bg: #0b1018;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, "Segoe UI", "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

/* Login */
.login-page {
  display: grid; place-items: center; min-height: 100vh;
  background: radial-gradient(1200px 600px at 50% -10%, #1f2937 0, transparent 60%), var(--bg);
}
.login-box {
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px 28px 24px;
  width: 100%; max-width: 360px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.45);
}
.login-box .logo { font-size: 36px; text-align: center; margin-bottom: 4px; }
.login-box h1 { font-size: 22px; margin: 0; text-align: center; }
.login-box .sub { color: var(--muted); text-align: center; margin: 4px 0 18px; font-size: 13px; }
.login-box label { display: block; margin: 10px 0; font-size: 12px; color: var(--muted); }
.login-box input {
  display: block; width: 100%; margin-top: 6px;
  background: var(--bg-3); border: 1px solid var(--border);
  color: var(--text); padding: 10px 12px; border-radius: 8px; font-size: 14px;
  outline: none;
}
.login-box input:focus { border-color: var(--accent); }
.login-box button {
  width: 100%; margin-top: 14px; padding: 10px 14px;
  background: var(--accent); color: #0b1018; border: 0; border-radius: 8px;
  font-weight: 600; font-size: 14px; cursor: pointer;
}
.login-box button:hover { filter: brightness(1.06); }
.err {
  background: rgba(248,81,73,0.1); color: #ffb4ad;
  border: 1px solid rgba(248,81,73,0.4); padding: 8px 10px;
  border-radius: 6px; font-size: 13px; margin-bottom: 6px;
}

/* App layout */
.app { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.sidebar {
  background: var(--bg-2); border-right: 1px solid var(--border);
  padding: 18px 14px; overflow-y: auto; position: sticky; top: 0; height: 100vh;
}
.brand a { color: var(--text); font-weight: 700; font-size: 16px; }
.search { margin: 14px 0 10px; }
.search input {
  width: 100%; background: var(--bg-3); border: 1px solid var(--border);
  color: var(--text); padding: 8px 10px; border-radius: 8px; font-size: 13px; outline: none;
}
.search input:focus { border-color: var(--accent); }
.nav-group { margin: 14px 0 8px; }
.nav-group-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted); padding: 4px 8px; margin-top: 6px;
}
.nav-link {
  display: block; padding: 6px 10px; border-radius: 6px;
  color: var(--text); font-size: 13.5px;
}
.nav-link:hover { background: var(--bg-3); text-decoration: none; }
.nav-link.active { background: rgba(88,166,255,0.14); color: var(--accent); }
.foot {
  margin-top: 24px; padding-top: 14px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--muted);
  display: flex; align-items: center; justify-content: space-between;
}
.logout { color: var(--muted); }
.logout:hover { color: var(--warn); }

/* Content */
.content { padding: 36px 48px; max-width: 980px; }
.page h1 { font-size: 28px; margin: 0 0 8px; }
.page .lead { color: var(--muted); margin-bottom: 24px; }
.crumb { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.meta { color: var(--muted); font-size: 12px; margin-bottom: 24px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.card {
  background: var(--bg-2); border: 1px solid var(--border);
  padding: 14px 16px; border-radius: 10px;
}
.card h3 { margin: 0 0 8px; font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.card ul { margin: 0; padding-left: 18px; }
.card li { margin: 4px 0; }
.hint { margin-top: 28px; color: var(--muted); font-size: 13px; }

/* Markdown rendered */
.md-body { font-size: 15.5px; }
.md-body h1, .md-body h2, .md-body h3, .md-body h4 {
  margin-top: 1.6em; line-height: 1.25; border-bottom: 1px solid var(--border); padding-bottom: 4px;
}
.md-body h1 { font-size: 24px; }
.md-body h2 { font-size: 20px; }
.md-body h3 { font-size: 17px; border-bottom: none; }
.md-body h4 { font-size: 15px; border-bottom: none; color: var(--muted); }
.md-body p, .md-body li { line-height: 1.65; }
.md-body code {
  background: var(--code-bg); padding: 2px 5px; border-radius: 4px;
  font-family: "JetBrains Mono", "Menlo", "Consolas", monospace; font-size: 13px;
}
.md-body pre {
  background: var(--code-bg); padding: 14px 16px; border-radius: 8px;
  overflow-x: auto; border: 1px solid var(--border);
}
.md-body pre code { background: transparent; padding: 0; }
.md-body blockquote {
  border-left: 3px solid var(--accent); padding: 4px 14px; color: var(--muted);
  background: rgba(88,166,255,0.06); margin: 14px 0;
}
.md-body table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
.md-body th, .md-body td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.md-body th { background: var(--bg-3); }
.md-body hr { border: 0; border-top: 1px solid var(--border); margin: 24px 0; }
.md-body img { max-width: 100%; border-radius: 6px; }

/* Search */
.results { list-style: none; padding: 0; }
.results li { padding: 14px 0; border-bottom: 1px solid var(--border); }
.results .badge {
  display: inline-block; background: var(--bg-3); color: var(--muted);
  padding: 1px 8px; border-radius: 999px; font-size: 11px; margin-left: 8px;
}
.snip {
  background: var(--bg-2); border: 1px solid var(--border); padding: 8px 10px;
  border-radius: 6px; white-space: pre-wrap; font-size: 12.5px;
  color: var(--muted); margin: 6px 0 0;
  font-family: "JetBrains Mono", "Menlo", monospace;
}
.snip mark { background: var(--mark); color: #1a1300; padding: 0 2px; border-radius: 2px; }

@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .content { padding: 24px 18px; }
}