* { 
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}
body {
    background-color: #9b59b6;
}
.app {
    background-color: #ffffff40;
    color: #fff;
    width: 90%;
    max-width: 600px;
    border-radius: 10px;
    margin: 100px auto 0;
    padding: 30px;
}
.app h1 {
    padding-bottom: 20px;
    border-bottom: solid 1px #9b59b6;
}
.quiz {
    padding: 20px 0;
}
#answers {
    margin-top: 20px;
    margin-bottom: 0;
}
.btn {
    width: 100%;
    margin-bottom: 15px;
    text-align: left;
    font-size: 16px;
    padding: 15px;
    border-radius: 6px;
    border: solid 1px #9b59b6;
    outline: none;
    background-color: #fff;
    color: #444;
    cursor: pointer;
    transition: 0.3s;
}
.btn:hover:not([disabled]) {
    background-color: #9b59b6;
    color: white;
}
.btn:disabled {
    cursor: no-drop;
}
#next {
    width: 150px;
    padding: 10px;
    margin: 15px auto 0;
    font-weight: 500;
    outline: none;
    border: none;
    border-radius: 4px;
    background-color: #7e4398;
    color: white;
    display: none;
    cursor: pointer;
    position: relative;
}
.correct {
    background-color: #27ae60;
}
.incorrect {
    background-color: #e74c3c;
}
.correct , .incorrect {
    border: none;
    color: white;
}