:root {
    --primary-color: #007bff;
    --bg-color: #f8f9fa;
    --text-color: #212529;
  }
  
  body {
    margin: 0;
    font-family: sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    transition: 0.3s;
  }
  
  .sidebar {
    width: 200px;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    height: 100vh;
  }
  
  .content {
    flex: 1;
    padding: 2rem;
  }
  
  .card {
    background-color: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
  }
  
  .settings {
    margin-top: 2rem;
    padding: 1rem;
    background: #e9ecef;
    border-radius: 8px;
  }
  
  .preset-btn {
    margin-right: 10px;
    margin-bottom: 10px;
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
  }
  
  .preset-btn:hover {
    opacity: 0.9;
  }
  
  input[type="color"],
  input[type="text"] {
    margin-left: 0.5rem;
    margin-top: 4px;
  }
  
  #user-id {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid #ccc;
    margin-top: 10px;
  }