:root {
  --bg: #0f1419;
  --surface: #1a2028;
  --border: #2d3742;
  --text: #d8dce0;
  --muted: #8a96a3;
  --accent: #4a9eff;
  --error: #ff6464;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { color: var(--accent); text-decoration: none; font-weight: 600; }
.logout-form button {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  padding: 6px 12px; cursor: pointer; border-radius: 4px;
}
main { max-width: 1200px; margin: 0 auto; padding: 24px; }
.login-box {
  max-width: 360px; margin: 80px auto; background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; padding: 32px;
}
.login-box h1 { margin: 0 0 16px; }
.login-box label { display: block; margin: 12px 0; }
.login-box input {
  width: 100%; padding: 8px 10px; background: var(--bg);
  border: 1px solid var(--border); color: var(--text); border-radius: 4px;
}
.login-box button {
  width: 100%; padding: 10px; margin-top: 16px; background: var(--accent);
  color: white; border: 0; border-radius: 4px; cursor: pointer; font-weight: 600;
}
.error {
  background: rgba(255, 100, 100, 0.1); border: 1px solid var(--error);
  color: var(--error); padding: 8px 12px; border-radius: 4px; margin-bottom: 12px;
}
.muted { color: var(--muted); }
.dashboard h1 { margin: 0 0 16px; }