#sidebar,
#sidebar-placeholder {
  width: 220px;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

#sidebar {
  background: rgba(7, 10, 28, 0.82);
  backdrop-filter: blur(6px);
  padding: 20px;
  box-shadow: 2px 0 18px rgba(0, 0, 0, 0.55);
  border-right: 1px solid rgba(120, 150, 255, 0.2);
}

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

#sidebar li {
  margin: 15px 0;
}

#sidebar a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s;
}

#sidebar a:hover {
  color: #ffea00;
}