style.css

*{
    margin:0;
    padding: 0;
}

body{
    width: 100%;
    height: 100vh;
    background-color: #ECECEC;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header{
    width: 100%;
    height: 20%;
    font-size: 2rem;
    display: flex;
    justify-content: space-around;
    /*background-color: grey;*/
}

.title,.result{
    margin: 120px 0 0 10px;
}

.container{
    width: 70%;
    /*background-color: green;*/
    display: flex;
    align-items: center;
    flex-direction: column;
    margin:20px 0;
    border-radius: 10px;
    box-shadow: 4px 4px 62px rgba(0, 0,0, 0.1);
}

.question{
    margin:20px;
    font-size: 1.5rem;
}

.options{
    display: flex;
    flex-wrap: wrap;
}

.option{
    min-width: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

button{
    cursor: pointer;
    height: 40px;
    font-size: 1rem;
    margin: 10px;
    padding: 0 20px;
    border-radius: 50px;
    border: none;
    box-shadow: 4px 4px 20px rgba(0, 0,0, 0.1);
    opacity: 0.6;
    transition: 0.5s ease;
}

button:hover{
    box-shadow: 0px 0px 20px rgba(0, 0,0, 0.1);
    opacity: 1;
}

.correct{
    background-color: rgb(7, 212, 7);
}

.wrong{
    background-color: rgb(255, 46, 46);
}