body {
    font-family: Arial, sans-serif;
   background:url(../images/4.jpg) no-repeat 0px 0px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#quiz-container {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 300px;
}

#question-counter {
    font-size: 1.2em;
    margin-bottom: 10px;
    color: #555;
}

#question-container {
    margin-bottom: 20px;
}

button {
    margin-top: 10px;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#next-btn {
    background-color: #4CAF50;
    color: white;
}

#quit-btn {
    background-color: #f44336;
    color: white;
}

#score {
    margin-top: 20px;
    font-weight: bold;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: #fff;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 300px;
    border-radius: 8px;
    text-align: center;
}

.close-btn {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-btn:hover,
.close-btn:focus {
    color: #000;
}

#modal-ok-btn {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
}