* {
    margin: 0;
    padding: 0;
    font-family: Poppins, sans-serif;
    box-sizing: border-box;
}

body{
    background-color: #7b00c2;
}
.progress-container {
    width: 100%;
    height: 10px;
    background-color: #ddd;
    border-radius: 10px;
    margin-bottom: 20px;
    overflow: hidden;
}

#progress-bar {
    height: 100%;
    width: 0%;
    background-color: #3b004b;
    transition: width 0.4s ease;
}


.app{
    background-color: #ffffff;
    width: 90%;
    max-width: 600px;
    margin: 100px auto 0;
    padding: 30px;
    box-shadow: #333 0px 0px 10px 2px;
}
.app h1{
    font-weight: 25px;
    color: black;
    font-weight: 600;
    border-bottom: 1px solid #333;
    padding-bottom: 30px;
}

.quiz{
    padding: 20px 0;
}

.quiz h2{
    font-size: 18px;
    color: #7b00c2;
    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{
    background-color: #7b00c2;
    color: #ffffff;
    border: 1px solid hsl(0, 0%, 0%);
}

.btn:disabled{
    cursor: no-drop;
}

#next-btn{
    background: #7b00c2;
    color: #ffffff;
    font-weight: 500;
    width: 150px;
    border: 0;
    padding: 10px;
    margin: 20px auto 0;
    border-radius: 4px;
    cursor: pointer;
    display: none;
}
.correct {
    background-color: #4CAF50;
    color: white;
}

.incorrect {
    background-color: #f44336;
    color: white;
}