*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    width: 100%;
    height: 100%;
}
body{
    
    background-color: rgb(144, 186, 181);
}
#main{
    padding-top: 60px;
}
#first{
    width: 100%;
    height: 100vh;
}

#head{
    width: 15vw;
    height: 7vh;
    margin-left: 2vw;
    margin-top: 2vh;
    color: #83522F;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
}
#vid{
    width: 35vw;
    height: 52vh;
    margin: 2vw;
    border-radius: 7%;
    display: flex;
    align-items: center;
    justify-content: center;
}
#vid iframe{
    width: 30vw;
    border-radius: 10%;
    height: 35vh;
}
#cont{
    display: flex;
      align-items: center;
      justify-content: center;
      gap: 40px;
      padding: 80px 10%;
      flex-wrap: wrap;
    
}
#vid{
       flex: 1;
       height: 36vh;
      max-width: 500px;
      background: white;
      border-radius: 20px;
      box-shadow: 0px 8px 20px rgba(0,0,0,0.15);
      overflow: hidden;
      transition: transform 0.3s ease;
}
 #vid:hover {
      transform: scale(1.03);
    }
#vid iframe {
        width: 100%;
        height: 280px;
        border: none;
    }
#content{ 
     flex: 1;
      max-width: 500px;
      background: white;
      border-radius: 20px;
      padding: 40px;
      box-shadow: 0px 8px 20px rgba(0,0,0,0.15);
}
#content h2{
    font-size: 28px;
      margin-bottom: 20px;
    color: rgb(49, 163, 212);
}
#content ul{
    list-style: none;
      padding: 0;
}
#content ul li{
    margin: 12px 0;
      padding-left: 24px;
      position: relative;
      font-size: 16px;
}
#content ul li::before {
      content: "✔";
      position: absolute;
      left: 0;
      color: #4b2e83;
      font-weight: bold;
    }
#second{
    width: 100%;
    height: 100vh;
}
#sechead{
    width: 100%;
    color: #2a35b4;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
}
#boxes{
    margin-top: 5vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20vw;
    padding-top: 5vh;
    
}
#box{
    width: 35vw;
    height: 47vh;
    background-color: #ffffff;
    border-radius: 5%;
}
#box ul{
    margin-left: 2.5vw;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
#box h2{
    font-size: x-large;
    color: rgb(63, 120, 212);
    margin-left: 5vw;
    margin-top: 2vh;
}
#box1{
    width: 35vw;
    height: 47vh;
    background-color: #ffffff;
    border-radius: 5%;
    
}

#box1 ul{
    margin-left: 2.5vw;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
#box1 h2{
    font-size: x-large;
    color: rgb(63, 120, 212);
    margin-top: 2vh;
}

#box3{
    width: 35vw;
    height: 47vh;
    background-color: #ffffff;
    border-radius: 5%;
    margin-top: 5vh;
    margin-left: 30vw;
}

#box3 ul{
    margin-left: 2.5vw;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
#box3 h2{
    font-size: x-large;
    color: rgb(63, 120, 212);
    margin-left: 5vw;
    margin-top: 2vh;
}
#third{
    width: 100%;
    height: 90vh;
    margin-top: 20px;
    
}
#rev{
    margin-top: 13vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10vw;
    padding-top: 5vh;
}
#revise{
    width: 35vw;
    height: 58vh;
    background-color: #ffffff;
    border-radius: 5%;
    margin-top: 5vh;
    margin-left: 5vw;
    padding: 20px;
}
#revise ul{
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
#revise h2{
    font-size: x-large;
    color: rgb(63, 120, 212);
    display: flex;
    flex-direction: column;
    align-items: center;
}
#revise h3{
    font-size: large;
    color: rgb(63, 120, 212);
}

#revise1{
    width: 35vw;
    height: 58vh;
    background-color: #ffffff;
    border-radius: 5%;
    margin-top: 5vh;
    margin-left: 5vw;
    padding: 20px;
}
#revise1 ul{
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
#revise1 h2{
    font-size: x-large;
    color: rgb(63, 120, 212);
    
}
#revise1 h3{
    font-size: large;
    color: rgb(63, 120, 212);
}
#buttons{
    width: 100%;
    height: 10vh;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7vw;
    margin-top: 7vh;
}
#buttons button{
     width: 200px;
    height: 70px;
    border: 1px solid rgb(205, 177, 186);
    border-radius: 10px;
    background-color:  rgb(68, 150, 186);
    margin-top: 5vh;
    color: white;       
    font-size: large;
    color: white;
    text-decoration: none;
    cursor: pointer;
}
#buttons a{
    color: white;
    text-decoration: none;
}
#buttons button:hover{
    background-color:  rgb(22, 93, 124) ;
}
#buttons button:active{
     transform: scale(1.05);
    transform: transition 0.3s ease;
}
@media (max-width: 768px) {
    #main {
        padding-top: 60px;
        width: 100vw;
    }
    #nav1{
        width: 100%;
        height: 1vh;
        
    }
    #logo a{
        font-size: 4vw;
    }
    #logo h3{
        font-size: 3.5vw;
    }
    #nav1 {
        display: flex;
        align-items: center;
        justify-content: space-between; 
        width: 100vw;
        height: 13vh;
        padding: 10px;
        

    }
    #nav1 h2  {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 11px;
        margin-top: 5px;
        align-items: flex-start;
        gap: 8px;
    }
    #acad{
        width:30vw;
        height: fit-content;
        font-size: 3.5vw;
    }
    #nav1 h2 a {
        width: 100%;
        font-size: 11px;
        gap: 8px;
    }
    #first {
        width: 100vw;
        height: auto;
        padding: 10px 0;
    }
    #head {
        width: 90vw;
        height: auto;
        margin: 10px auto;
        font-size: 6vw;
        text-align: center;
        padding: 10px 0;
    }
    #cont {
        flex-direction: column;
        gap: 20px;
        padding: 20px 5vw;
    }
    #vid, #content {
        width: 95vw;
        max-width: 100%;
        height: auto;
        margin: 10px auto;
        padding: 10px;
    }
    
    #vid iframe {
        width: 100%;
        height: 40vw;
        min-height: 180px;
        max-width: 100%;
    }
    #vid{
        opacity: 1;
    }
    #content {
        padding: 20px 10px;
    }
    #content h2 {
        font-size: 5vw;
    }
    #content ul li {
        font-size: 4vw;
        padding-left: 20px;
    }
    #second {
        width: 100vw;
        height: auto;
        padding-bottom: 20px;
       
    }
    #sechead {
        font-size: 6vw;
        padding: 10px 0;
        text-align: center;
    }
    #boxes {
        flex-direction: column;
        gap: 20px;
        align-items: center;
        padding-top: 0;
       
    }
    #rev{
        flex-direction: column;
        gap: 20px;
        align-items: center;
        padding-top: 0;
        padding: 15px;
        
    }
    #box, #box1, #box3, #revise, #revise1 {
        width: 90vw;
        height: auto;
        margin: 10px auto;
        padding: 20px;
        border-radius: 5vw;
    }
    #revise, #revise1 {
        height: 70vh;
        padding:30px;
    }
    #box h2, #box1 h2, #box3 h2, #revise h2, #revise1 h2 {
        font-size: 5vw;
        
        text-align: center;
    }
    #box ul, #box1 ul, #box3 ul, #revise ul, #revise1 ul {
        
        font-size: 4vw;
        padding: 0;
    }
    #third {
        width: 100vw;
        height: 190vh;
        margin-top: 10px;
        
    }
    #revise, #revise1 {
       
        margin-top: 10px;
        padding: 15px 10px;
    }
    #revise li, #revise1 li{
         list-style: none;
    }
    #revise h3, #revise1 h3 {
        font-size: 4vw;
        text-align: center;
        display: flex;
        justify-content: center;
        align-items: center;
        
    }
    #buttons{
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 25vh;
       
    }
    #buttons button{
        width: 40vw;
       height: 20vh;
       background-color:  rgb(25, 91, 120);
       
    }
}