* {box-sizing: border-box;}
html {scroll-behavior: smooth;}
body{margin: 0; font-family: "ROBOTO", sans-serif; background-color: #000000;}
/* -------------------------------------------------------sec-top-box ----- */
.sec-top-box{
  display: flex;
  flex-wrap: wrap;
  height: 300px;
  background-image: url(images/cadtopimg.jpg);
  background-color: #000000b4;
  background-blend-mode: overlay;
  justify-content: center;
  align-items: center;
  text-align: center;
  background-attachment: fixed; 
  border-radius: 0px 0px 25px 25px;
}

.sec-top-box h1{
  flex: 100%;
  font-size: 6vw;
  text-shadow: 1.5px 2px 0 #0a0a0ada;
  letter-spacing: 0.3rem;
  color:rgb(242, 242, 247);
  transition: all 0.3s ease;
  z-index: 2;
}
/* -------------------------------------------------------sec-one-box ----- */
.sec-one-box{
    padding: 60px 50px 60px 50px;
    font-size: larger;
  }
  .sec-one-box-flex{
    display: flex;
    flex-wrap: wrap; 
  }
  .sec-one-box-image{
  flex: 25%;
  background-color: #4267b2;
  text-align: center;
  max-height: 400px;
  }
  .sec-one-box-paragraph{
    color: #ffffff;
  }
  .slideshow-container {
    position: relative;
    margin: auto;
    padding-top: 25px;
  }
  .slideshow-container img{
    width: 250px;
    height: 250px;
  }
  .numbertext {
    color: #f2f2f2;
    font-size: 12px;
    padding: 8px 5px;
    position: absolute;
    top: 0;
  }
  .dot {
    height: 10px;
    width: 10px;
    margin: 0 2px;
    background-color: white;
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.6s ease;
  }
  .active {
    background-color: #717171;
  }
  .fade {
    -webkit-animation-name: fade;
    -webkit-animation-duration: 1.5s;
    animation-name: fade;
    animation-duration: 1.5s;
  }
  
  @-webkit-keyframes fade {
    from {opacity: .4} 
    to {opacity: 1}
  }
  
  @keyframes fade {
    from {opacity: .4} 
    to {opacity: 1}
  }
  .sec-one-box-paragraph{
    flex: 65%;
    margin-left: 15px;
    }
  /* -------------------------------------------------------sec-two-box ----- */
  .sec-two-box{
    font-size: larger;
    padding: 0px 50px 60px 50px;
  }
  .sec-two-box-plan{
    display: flex;
    flex-wrap: wrap;
    padding-top: 30px;
    gap: 2%;
  }
  .sec-two-box-child-one{
    flex: 30%;
    background-image: url(images/cadpOne.jpg);
    background-size: cover;
    color: white;
    border: 2px solid #ffffff;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    border-radius: 25px;
  }
  
  .sec-two-box-child-two{
    flex: 30%;
    background-image: url(images/cadpTwo.jpg);
    background-size: cover;
    color: white;
    border: 2px solid #ffffff;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    border-radius: 25px;
  }
  .sec-two-box-color{
    background-color: #4267b2a8;
      box-shadow: rgba(50, 50, 93, 0.25) 0px 13px 27px -5px, rgba(0, 0, 0, 0.3) 0px 8px 16px -8px;
      border-radius: 25px 25px 400px 25px;
      padding: 1px;
      height: 100%;
      transition: .5s ease;
    }
    .sec-two-box-color:hover {
      height: 100%;
      border-radius: 25px;
      background-color:#4267b2; 
    }
     /* ------------------------------------------------sec-three-box ------- */
  .sec-three-box{
    font-size: larger;
    padding: 10px 40px 60px 40px;
    text-align: center;
      }
      .sec-three-box-child{
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        padding-top: 50px;
      }
      .cad-card{
        flex: 20%;
        border: 2px solid #4267b2;
        margin: 5px;
      }
      .cad-card img{
        width: 20vw;
        height: 20vw;
      }
      .cad-card-text{
        padding: 5px;
        background-color:#4267b2 ;
        color: #ffffff;
        font-size: small;
      }
      .cad-card:hover{
        scale: 102%;
      }
      .hidden-img{
        display: none;
      }
      .sec-three-box span{
        background-color: #4267b2 ;
         padding:10px;
         border-radius: 5px;
         transition: .5s ease;
         color: #ffffff;
      }
      .sec-three-box span:hover{
        background-color: #4d4d4d;
        cursor: pointer;
      }
     
   /* ------------------------------------------------------- screen 750px -- */
  @media screen and (max-width: 750px) {
    .sec-one-box{
      padding: 60px 50px 10px 50px;
    }
    .sec-one-box-hide-text{
      display: none;
    }
    .sec-one-box-show-text{
      display: block;
    }
    .sec-two-box{
      padding: 0px 50px 30px 50px;
    }
    .sec-two-box-child-one{
      flex: 100%;
      margin-bottom: 15px;
    }
    .sec-two-box-child-two{
      flex: 100%;
    }
  }

  /* ------------------------------------------------------- screen 550px -- */
  @media screen and (max-width: 550px){
  .sec-top-box h1{
      font-size: 9vw;
  }
    .sec-one-box{
        padding-left: 10px;
        padding-right: 10px;
      }
      .sec-one-box-paragraph{
        margin-left: unset;
        }
      .sec-two-box{
          padding-left: 10px;
          padding-right: 10px;
      }
      .sec-three-box{
        padding-right: 10px;
        padding-left: 10px;
          }
  }