body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
}

.quiz-container, .result-container, .start-quiz, .review-container {
    background: rgb(16, 112, 144);
    width: 50%;
    margin: 50px auto;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.2);
    color: #f4f4f4;
}

.question {
    font-size: 1.5em;
    margin-bottom: 10px;
}

.timer {
    display:block;
    font-size: 1.2em;
    font-weight: bold;
    color: red;
    
}

.answer-buttons .btn {
    display: block;
    width: 100%;
    padding: 10px;
    margin: 5px 0;
    font-size: 1.2em;
    cursor: pointer;
    border: none;
    background: lightblue;
    border-radius: 5px;
}

.answer-buttons .btn:hover {
    background: blue;
    color: white;
}

.stars {
    margin: 10px 0;
    font-size: 1.5em;
}

.message {
    font-size: 1.2em;
    margin-bottom: 10px;
}

.btn {
    background: green;
    color: white;
    padding: 10px 20px;
    border: none;
    font-size: 1.2em;
    cursor: pointer;
}

.btn:hover {
    background: rgb(34, 29, 177);
}