* {
    margin: 0px;
    padding: 0px;
  }
    body {
    font-family: Arial, Helvetica, sans-serif;
  }

  main {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .simulation-container {
    background-color: rgba(220, 229, 236, 255);
    width: 800px;
    height: 600px;
    /* padding: 5px; */
  }
  
  .title {
    margin: 0px;
    padding: 5px;
    letter-spacing: 0.1em;
    background-color: rgb(20, 117, 228);
    color: white;
    display: flex;
    justify-content: center;
  }
  
  /* Container Text  */
  
  .instruction-main {
    position: absolute;
    display: inline-block;
    top: 30px;
  }
  
  .instruction {
    position: absolute;
    display: inline-block;
    top: 30px;
  }
  
  .content-container {
    position: absolute;
    padding: 10px;
  }
  
  .content-main {
    position: absolute;
    display: inline-block;
    text-align: justify;
    top: 30px;
    left: 100px;
    width: 690px;
    font-size: 20px;
  }
  
  .instruments {
    position: absolute;
    display: inline-block;
    text-align: justify;
    top: 100px;
    left: 165px;
    width: 690px;
    font-size: 20px;
  }
  
  .content {
    position: absolute;
    display: inline-block;
    top: 30px;
    left: 70px;
    font-size: 20px;
    width: 1000px;
  }
  
  .container-of-list {
    position: absolute;
    text-decoration: none;
    position: absolute;
    top: 100px;
    left: 50px;
    width: 700px;
    font-size: 20px;
  }
  
  /* Next Button  */
  
  .next {
    position: absolute;
    left: 730px;
    top: 520px;
    padding: 10px 15px;
    color: white;
    background-color: rgb(20, 117, 228);
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
  #next-to-setup1 {
    visibility: visible;
  }
  
  #next-to-setup2 {
    visibility: hidden;
  }
  
  /* IMAGES  */
  
  .transbox {
    position: absolute;
    /* border: 1px solid red; */
    left: 460px;
    top: 215px;
    width: 120px;
    height: 85px;
  }
  
  .mainPageImg-step1 {
    position: absolute;
    left: 180px;
    top: 200px;
  }
  
  .instruments-img {
    position: absolute;
    width: 600px;
    left: 0px;
    top: 200px;
  }
  * {
    margin: 0;
    padding: 0;
  }
  
  nav {
    height: 75px;
    /* border: 2px solid black; */
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10px;
  }
  
  .redline {
    /* border: 2px solid black; */
    height: 7px;
    width: full;
    background-color: #fd7e14;
  }
  
  .vlabs {
    font-size: 35px;
    font-weight: 400;
    color: #2c99ce;
    font-family: sans-serif;
  }
  
  nav .logo1 {
    height: 60px;
  }
  
  nav .logo2 {
    height: 70px;
  }
  /* .line {
      width: 100%;
      height: 1.6rem;
      background-color: #dce5ec;
  } */
  
  .hero {
    height: 100vh;
    display: flex;
    justify-content: center;
  }
  
  #container {
    height: 600px;
    width: 800px;
    background-color: #dce5ec;
    position: relative;
  }
  
  .projection {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 2.5rem;
    letter-spacing: 0.1em;
    font-size: 1.6rem;
    background-color: rgb(20, 117, 228);
    color: rgb(255, 255, 255);
  }
  
  .texts {
    font-size: 14px;
  }
  
  .step1 {
    padding: 30px;
  }
  
  .content {
    display: flex;
    justify-content: space-around;
    position: absolute;
    top: 200px;
  }
  
  .images {
    position: absolute;
    top: 46px;
    left: 4px;
  }
  
  #arrowatindex {
    position: absolute;
    top: 304px;
    left: 560px;
    z-index: 1;
  }
  
  #btn1 {
    font-size: 16px;
    font-family: inherit;
    height: 40px;
    width: 100px;
    background-color: rgb(20, 117, 228);
    color: white;
    position: absolute;
    top: 344px;
    left: 613px;
    border-radius: 4px;
    border: none;
  }
  
  #btn1:hover {
    cursor: pointer;
  }
  
  #btn2 {
    font-size: 16px;
    font-family: inherit;
    height: 40px;
    width: 100px;
    background-color: rgb(20, 117, 228);
    color: white;
    position: absolute;
    top: 344px;
    left: 680px;
    border-radius: 4px;
    border: none;
  }
  
  #btn2:hover {
    cursor: pointer;
  }
  
  /* our css code of container1 ends here thank you */
  
  .hide {
    display: none;
  }
  
  #container2 {
    height: 600px;
    width: 800px;
    background-color: #dce5ec;
    position: relative;
    /* padding-left: 70px; */
  }
  
  .projection2 {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 2.5rem;
    letter-spacing: 0.1em;
    font-size: 1.6rem;
    background-color: rgb(20, 117, 228);
    color: white;
  }
  
  ul {
    position: absolute;
    top: 80px;
    left: 70px;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  
  #container2 li a {
    text-decoration: none;
    font-size: 20px;
    color: blue;
  }
  
  #btn2 {
    position: absolute;
    top: 544px;
    left: 20px;
    font-size: 16px;
    font-family: inherit;
    height: 40px;
    width: 100px;
    background-color: rgb(20, 117, 228);
    color: white;
    border-radius: 4px;
    border: none;
  }