body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
}

.hidden {
    display: none;
}

#timer {
    font-size: 2em;
    margin-bottom: 20px;
}

.question {
    margin-bottom: 20px;
}

.options button {
    display: block;
    width: 100%;
    margin: 5px 0;
    padding: 10px;
    font-size: 1em;
}

.correct {
    background-color: green;
    color: white;
}

.incorrect {
    background-color: red;
    color: white;
}
video{
    border-radius: 100%;
    height:200px;
    width:200px;
}