*{
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}
.container2{
width: 100%;
min-height: 100vh;
background: linear-gradient(135deg, #4203a9,#90bafc);
color: #fff;
padding: 10px;
}
.calc{
width: 100%;
max-width: 600px;
margin-left: 10%;
margin-top: 10%;
}
.calc h1{
font-size: 60px;
}
.input-box{
margin: 40px 0;
padding: 35px;
border-radius: 10px;
background: #90bafc;
display: flex;
align-items: center;
}
.input-box input{
flex: 1;
margin-right: 20px;
padding: 14px 20px;
border: 0;
outline: 0;
font-size: 18px;
border-radius: 5px;
position: relative;
}
.input-box button{
background: #ffff76;
border: 0;
outline: 0;
padding: 15px 30px;
border-radius: 5px;
font-weight: 500;
color: #333;
cursor: pointer;
}

.container3{
    width: 100%;
    height: 100vh;
    background: #e3f9ff;
    display: flex;
    align-items: center;
    justify-content: center;
}
.calc1{
    background: #3a4452;
    padding: 20px;
    border-radius: 10px;
}
.calc1 form input{
    border: 0;
    outline: 0;
    width: 60px;
    height: 60px;
    border-radius: 10px;
    box-shadow: -8px -8px 15px rgb(255, 255, 255, 0.1), 5px 5px 15px rgb(0, 0, 0, 0.2);
    background: transparent;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
    margin: 10px;
}
form .display{
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
}
form .display input{
    width: 100px;
    text-align: right;
    flex: 1;
    font-size: 45px;
    box-shadow: none;
}
form input.equal{
    width: 145px;
}

.l1{
    background: skyblue;
}
.container1{
    
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    left: 400px;
    background: azure;
    width: 450px;
    border-radius: 20px;
}
h1{
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: sans-serif;
    text-transform: uppercase;
    font-size: 40px;
}
#captchaTxtArea{
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    left: 60px;
    color: blueviolet;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    outline: none;
    border:3px solid black;
    margin-top: 15px;
    width: 154px;
    font-size: 27px;
}
#captchaEnter{
    margin-top: 15px;
    margin-bottom: 15px;
    width: 303px;
    height: 40px;
    border: 3px solid black;
}
#captchaEnter::placeholder{
    color: black;
    font-size: 24px;
    text-align: center;
}
#refreshbtn{
    background: #3399ff;
    width: 150px;
    height: 35px;
    border: 2px solid black;
    font-weight: bold;

}
#checkbtn{
    background: #66ff99;
    width: 150px;
    height: 35px;
    border: 2px solid black;
    font-weight: bold;
}



       .l2{
        background-color: burlywood;
       }
       .container4{
        display: flex;
        align-items: center;
        justify-content: center;
        box-sizing: border-box;
        font-family: "Poppins",sans-serif;
        background-color: #1a1820;
        width: 500px;
        height: 300px;
        position: relative;
        transform: translate(-50%, -50%);
        top: 300px;
        left: 630px;
        padding: 3em;
        border-radius: 0.5em;
       }
       h3{
        font-size: 23px;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        left:130px;
        bottom:80px;
        color: bisque;

       }
       button{
        background-color: blue;
        position: relative;
        right: 10px;
        margin: 2em auto;
        padding: 1em;
        color: #ffffff;
        border: none;
        outline: none;
        border-radius: 0.3em;
       }
       #otpDisplay{
        font-size: 1em;
        background-color: #2a292e;
        color: #ffffff;
        letter-spacing: 1em;
        text-align: center;
        padding: 1em 0;
        position: relative;
        top: 90px;
        right: 130px;
       }

.l3{
    background: #001e4d;
}
.app{
    background: #fff;
    width: 90%;
    max-width: 600px;
    margin: 100px auto 0;
    border-radius: 10px;
    padding: 30px;
}
.app h1{
    font-size: 25px;
    color: #001e4d;
    font-weight: 600;
    border-bottom: 30px;
}
.quiz{
    padding: 20px 0;
}
.quiz h2{
    font-size: 18px;
    color: #001e4d;
    font-weight: 600;
}
.btn{
    background: #fff;
    color: #222;
    font-weight: 500;
    width: 100%;
    border: 1px solid #222;
    padding: 10px;
    margin: 10px 0;
    text-align: left;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}
.btn:hover:not([disabled]){
    background-color: #222;
    color: #fff;
}
.btn:disabled{
    cursor: no-drop;
}
#next-btn{
    background: #001e4d;
    color: #fff;
    font-weight: 500;
    width: 150px;
    border: 0;
    padding: 10px;
    margin: 20px auto 0;
    border-radius: 4px;
    cursor: pointer;
    display: none;
}
.correct{
    background: #9aeabc;
}
.incorrect{
    background: #ff9393;
}