*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins',sans-serif;
    box-sizing: border-box;
}
body{
    background-color: #001e4d;
}
.app{
    background: #fff;
    width: 90%;
    max-width: 550px;
    margin: 100px auto 0;
    border-radius: 10px;
    padding: 30px;
}
.header h2{
    color: #001e4d;
    margin-bottom: 1vh;
}
.option{
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.optionbtn{
    text-align: left;
    padding: 10px;
    outline: 0;
    font-weight:600;
    border: 1px solid black;
    border-radius: 5px;
}
.next{
    margin-top:2vw;
    text-align: center;
    display: none;
}
.next button{
    padding:1.5vh 6vh 1.5vh 6vh;
    border-radius: 10px;
    border:0;
    outline:0;  
    background: #001e4d;
    color: white;
    cursor: pointer;
}
.nextBtn{
    font-weight: 700;
    font-size: 2vh;
}
.optionbtn:hover{
    background-color:#222 ;
    color: #fff;
    transition: all 0.3s;
}
.nextBtn:active{
    transform: perspective(10px) translateZ(-1px);
}
.question{
    margin: 1vw 0;
    font-weight: 600;
}
.incorrect{
    background-color: rgb(233, 172, 172);
}
.correct{
    background-color: rgb(103, 121, 75);
}