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

header {
  background-color: #f2f2f2;
  padding: 20px;
  text-align: center;
}

#sidebar {
  height: 100%;
  width: 250px;
  position: fixed;
  top: 0;
  left: -250px;
  background-color: #333;
  transition: all 0.3s;
}

#sidebar.active {
  left: 0;
}

.toggle-btn {
  position: absolute;
  left: 250px;
  top: 20px;
  cursor: pointer;
  font-size: 24px;
  color: #fff;
}

ul {
  padding: 0;
  list-style: none;
  margin-top: 50px;
}

ul li {
  padding: 15px;
  border-bottom: 1px solid #555;
}

ul li a {
  color: #fff;
  text-decoration: none;
}

.content {
  margin-left: 250px;
  padding: 20px;
  transition: all 0.3s;
}


        .section-button {
            background-color: #EEEEEE;
            padding: 8px 20px;
            text-decoration: none;
            font-weight: bold;
            border-radius: 5px;
            cursor: pointer;
            margin: 5px;
        }
        #english-content, #maths-content, #science-content {
            display: none;
        }


#tasklist {
  font-family: Arial, Helvetica, sans-serif;
  border-collapse: collapse;
  width: 100%;
}

#tasklist td, #tasklist th {
  border: 1px solid #ddd;
  padding: 8px;
}

#tasklist tr:nth-child(even){background-color: #f2f2f2;}

#tasklist tr:hover {background-color: #ddd;}

#tasklist th {
  padding-top: 12px;
  padding-bottom: 12px;
  text-align: left;
  background-color: #04AA6D;
  color: white;
}