* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body {
    background-image: url("/img/bacground.png");
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    margin: 50px;
}
.quiz-container {
    max-width: 500px;
    margin: auto;
    padding: 20px;
    border: solid 2px black;
    border-radius: 20px;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
    background-color: white;
}
.question {
    font-size: 20px;
    margin-bottom: 20px;
}
.option label {
    display: block;
    padding: 10px;
    border: solid 2px black;
    border-radius: 5px;
    margin-bottom: 10px;
    cursor: pointer;
    background-color: white;
}
.option input {
    display: none;
}
.next-button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background: blue;
    color: white;
    border-radius: 5px;
    display: none;
}
.envelope {
    height: 20vh;
}