* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    font-family: monospace;
}

body {
    background: #00003f;
}

.app {
    background-color: #fff;
    width: 90%;
    max-width: 465px;
    margin: 80px auto 0;
    border-radius: 10px;
    padding: 30px;
}

.app h1 {
    color: #00003f;
    font-weight: 600;
    border-bottom: 1px solid #333;
    box-shadow: 0px 0px 16px 3px #00003f;
    padding: 10px;

}

.quiz {
    padding: 20px 0;

}

.quiz h2 {
    color: #00003f;
    font-weight: 600;
}

.btn {
    background-color: #fff;
    color: #140054;
    font-weight: 900;
    width: 90%;
    border: 1px solid #222;
    padding: 14px;
    margin: 15px 0;
    text-align: left;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1.3rem;
}

.btn:hover:not([disabled]) {
    background-color: #222;
    color: #fff;
}
.btn:disabled{
    cursor: no-drop;
}
#next-btn {
    background-color: #00003f;
    color: #fff;
    font-weight: 500;
    width: 150px;
    border: 0;
    padding: 10px;
    margin: 20px auto 0;
    border-radius: 4px;
    cursor: pointer;
    display: none;
}
.correct{
    background-color: #9aeabc;
}
.incorrect{
    background-color: #ff9393;
}