:root {
  --bg-main: #0f172a;
  --bg-card: #1e293b;
  --border: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  background-color: #020617;
}

header a {
  color: var(--accent);
  text-decoration: none;
  font-weight: bold;
  font-size: 1.25rem;
}

.layout {
  display: flex;
  flex: 1;
}

sidebar {
  width: 260px;
  border-right: 1px solid var(--border);
  padding: 1.5rem;
  background-color: #020617;
}

sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

sidebar li {
  margin-bottom: 0.75rem;
}

sidebar a {
  color: var(--text-muted);
  text-decoration: none;
  display: block;
  padding: 0.4rem 0.6rem;
  border-radius: 0.25rem;
}

sidebar a:hover, sidebar a.active {
  color: var(--accent);
  background-color: var(--bg-card);
}

main {
  flex: 1;
  padding: 2rem;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-top: 1rem;
}

code {
  background-color: #0f172a;
  color: #38bdf8;
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-family: monospace;
}