body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b1020;
  color: #e5e7eb;
}

header {
  background: #020617;
  padding: 1rem;
}

header h1 {
  margin: 0 0 0.5rem 0;
}

nav button {
  margin-right: 0.4rem;
  background: #1e293b;
  color: white;
  border: none;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
}

nav button:hover {
  background: #334155;
}

.section {
  padding: 1.5rem;
}

.hidden {
  display: none;
}

input {
  display: block;
  margin: 0.5rem 0;
  padding: 0.5rem;
  width: 220px;
}

#userArea {
  margin-left: 1rem;
}