:root {
  --bg: #0f1117;
  --panel: #171a23;
  --border: #262a36;
  --text: #e6e8ef;
  --muted: #8b90a3;
  --accent: #5b8cff;
  --danger: #ff5b6a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
}
.sidebar h1 { font-size: 15px; padding: 0 20px 16px; color: var(--muted); font-weight: 600; }
.sidebar a {
  display: block;
  padding: 10px 20px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
.sidebar a:hover { background: var(--border); }
.main { flex: 1; padding: 32px; max-width: 1000px; }
h2 { margin-top: 0; }
table { width: 100%; border-collapse: collapse; margin-top: 16px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 500; }
.tag { display: inline-block; background: var(--border); border-radius: 4px; padding: 2px 8px; margin: 2px; font-size: 12px; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
  border: none;
  cursor: pointer;
}
form.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  max-width: 480px;
}
label { display: block; margin-top: 14px; margin-bottom: 6px; font-size: 13px; color: var(--muted); }
input, select {
  width: 100%;
  padding: 9px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}
.error { color: var(--danger); margin-top: 12px; font-size: 14px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }