:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #ddd;
  --accent: #2a6f97;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e8e8e8;
    --muted: #999;
    --border: #333;
    --accent: #6fb3d8;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.topbar .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  text-decoration: none;
}

.topbar nav {
  display: flex;
  gap: 1rem;
  flex: 1;
}

.topbar a {
  color: var(--fg);
  text-decoration: none;
}

.topbar nav a:hover {
  color: var(--accent);
}

.logout {
  font-size: 0.9rem;
  color: var(--muted);
}

main {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1.25rem;
}

.muted { color: var(--muted); }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

button, .btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
}