body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fa;
}

.login-container {
  width: 300px;
  margin: 150px auto;
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

input {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
}

button {
  width: 100%;
  padding: 12px;
  background: #007bff;
  border: none;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}

.sidebar {
  width: 220px;
  background: #333;
  color: white;
  position: fixed;
  height: 100%;
  padding: 20px;
}

.sidebar h2 {
  font-size: 20px;
}

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

.sidebar button {
  width: 100%;
  margin: 10px 0;
  background: #555;
}

.content {
  margin-left: 240px;
  padding: 30px;
}

.section {
  background: white;
  padding: 20px;
  border-radius: 10px;
}