body {
  margin: 0;
  background: #0b0f14;
  color: #fff;
  font-family: Inter, sans-serif;
}

.app {
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 220px;
  background: #0f1520;
  padding: 20px;
  box-shadow: 4px 0 20px rgba(0,0,0,.4);
}

.sidebar h2 {
  margin-bottom: 20px;
}

.sidebar button {
  width: 100%;
  margin-bottom: 10px;
  padding: 12px;
  background: none;
  border: 1px solid #1f2937;
  color: #fff;
  border-radius: 10px;
  cursor: pointer;
}

.sidebar button:hover {
  background: #1f2937;
}

.content {
  flex: 1;
  padding: 40px;
}