body {
    margin: 0;
    font-family: "Noto Sans Devanagari", Arial, sans-serif;
  }
  
  .header {
    background: #220101;
    padding: 15px;
    display: flex;
    gap: 8px;
  }
  
  .subject-btn {
    background: rgb(8, 226, 19);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
  }
  .subject-btn:hover {
    background: rgb(8, 11, 236);
  }
  
  .container {
    display: flex;
    height: calc(100vh - 60px);
  }
  
  .sidebar {
    width: 250px;
    background: #fafafa;
    border-right: 1px solid #2eeb15;
    overflow-y: auto;
  }
  
  .sidebar button {
    width: 100%;
    text-align: left;
    padding: 10px;
    border: none;
    background: none;
    cursor: pointer;
  }
  .sidebar button:hover {
    background: #14bd05;
  }
  
  .content {
    flex: 1;
    padding: 20px;
  }

  .kosidbar {
    cursor: pointer;
  }

  .kosidbar:hover {
    color: blue;
  }

  .kosidbar:active {
    color: green;
  }