*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    /* font-family: Arial, sans-serif; */
    background: #f7f7f7;
    line-height: 1.6em;
 
  }
  
  .container {
    max-width: 900px;
    margin: auto;
  
  }
  
  h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
  }
  h3{
    margin-top: 15px;
  }
   ol{
    padding-left: 50px;
  }
  ul{
    padding-left: 50px;
  }
  table{
    width: 60%;
    margin-top: 10px;
    margin-bottom: 10px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .card {
    background: #ffffff;
    padding: 1rem;
    margin-bottom: 1.2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding-left: 50px;
  }
  
  .card h2 {
    color: #2980b9;
    margin-bottom: 0.5rem;
  }
  
  .card p, .card ul {
    font-size: 1rem;
    color: #333;
  }
  table, th, td {
    border:1px solid black;
    border-collapse: collapse;
  }
  
  canvas {
    display: block;
    margin: 1rem auto;
    border: 1px solid #ccc;
    background: #fff;
  }
  
  #nextPlotBtn {
    display: block;
    margin: 0.5rem auto;
    background-color: #27ae60;
    color: #fff;
    padding: 10px 20px;
    border: none;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
  }
  
  #nextPlotBtn:hover {
    background-color: #1e8449;
  }
  
  @media (max-width: 600px) {
    canvas {
      width: 100% !important;
      height: auto !important;
    }
  }
  