/* General styles */
body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background: #001f3f; /* Deep sea background color */
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    text-align: center;
  }

  .container-lower {
    max-width: 100%;
    margin: 0 auto;
    text-align: center;
  }
  
  h1, h2, h3 {
    text-align: center;
    color: #00c0ff; /* Bright aqua for headings */
  }
  
  p {
    color: #d9faff;
  }
  
  /* Header section */
  .hero {
    background: linear-gradient(135deg, #004080, #0077be);
    padding: 2rem 0;
    text-align: center;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.2rem;
  }
  
  /* Section styles */
  section {
    padding: 2rem 0;
  }
  
  section:nth-child(even) {
    background: #002d4f; /* Alternating background colors */
  }
  
  .data-table table {
    width: 100%;
    border-collapse: collapse;
  }
  
  .data-table th, .data-table td {
    border: 1px solid #00c0ff;
    padding: 0.5rem;
    text-align: center;
  }
  
  /* Model diagram and graphs */
  img {
    max-width: 100%;
    display: block;
    margin: 1rem auto;
  }
  
  /* Footer */
  footer {
    background: #001f3f;
    text-align: center;
    padding: 1rem;
    border-top: 2px solid #00c0ff;
  }
  
  footer p {
    margin: 0;
    color: #d9faff;
  }

  .separator {
    width: 100%;
    height: 2px;
    background-color: #5e3bb8;
    margin: 20px 0;
}