* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif, sans-serif;
  }
  html {
    scroll-behavior: smooth;
  }
header {
    background-color:#13572A;
    color: white;
    padding: 1em;
    text-align: center;
}
.div {
  text-align: center; 
}

.div img {
  max-width: 100%;
  height: auto;
  display: inline-block;
}



.intro, .features, .applications {
    padding: 2em;
    background: white;
    margin: 1em auto;
    max-width: 900px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.features ul {
    list-style: disc inside;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1em;
    margin-top: 1em;
}

.card {
    background: #e6f0ff;
    padding: 1.5em;
    border-radius: 8px;
    text-decoration: none;
    color: #13572A;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

footer {
    background-color: #373D39;
    color: #fff;
    padding: 50px 30px;
    font-family: 'Segoe UI', sans-serif;
    margin-top: 3rem;
  }
  
  .rowf,
  .row2f {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 30px;
  }
  
  .colf,
  .colf2 {
    flex: 1 1 200px;
  }
  
  .colf-heading h3,
  .colf h3,
  .colf2-heading h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #fff;
  }
  
  .colf-text ul,
  .colf2-text ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .colf-text ul li,
  .colf2-text ul li {
    margin-bottom: 8px;
  }
  
  .colf-text ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  .colf-text ul li a:hover {
    color: #ccc;
  }
  
  .colf2-text p {
    margin: 0;
    line-height: 1.6;
  }
  
  .colf2-text ul li {
    font-size: 14px;
  }
  
  hr {
    border: 0;
    height: 1px;
    background-color: #fff;
    opacity: 0.2;
    margin: 30px 0;
  }
  
  /* Responsive */
  @media (max-width: 768px) {
    .rowf,
    .row2f {
      flex-direction: column;
      gap: 40px;
    }
  
    footer {
      text-align: center;
    }
  }