/* General */
body {
    font-family: Arial, sans-serif;
    background: #f7f9fb;
    text-align: center;
    margin: 0;
    padding: 0;
  }
  .container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
  }
  h1, h2, h3, h4 {
    margin: 10px 0;
  }
  
  /* Cursor Tracker */
  #cursor-tracker {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: #4f46e5;
    position: fixed;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9999;
  }
  
  /* Header */
  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fff;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
  }
  .header-right span {
    margin-left: 10px;
    padding: 5px 10px;
    border-radius: 8px;
    background: #e0e7ff;
    color: #4f46e5;
  }
  
  /* Buttons */
  button {
    padding: 10px 20px;
    background: #4f46e5;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
  }
  button:hover {
    background: #4338ca;
  }
  
  /* Modals */
  .modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
  }
  .modal-content {
    background: #fff;
    padding: 20px;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    text-align: center;
  }
  
  /* Hidden */
  .hidden { display: none; }
  
  /* Inputs */
  input, textarea {
    width: 90%;
    margin: 5px 0;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 16px;
    text-align: center;
  }
  
  /* Courses */
  .course-card {
    background: #fff;
    border-radius: 10px;
    padding: 15px;
    margin: 10px 0;
    cursor: pointer;
    transition: 0.3s;
    border: 1px solid #ddd;
  }
  .course-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  }
  
  /* Error */
  .error-msg {
    color: red;
    margin: 5px 0;
  }
  
  /* Lesson & Quiz Modal */
  .lesson-modal, .quiz-modal {
    max-width: 700px;
  }
  .lesson-controls button, .quiz-controls button {
    margin: 10px;
  }