body {
    font-family: Arial, sans-serif;
    background: #eef2f7;
}

.quiz-container {
    width: 420px;
    background: #fff;
    margin: 50px auto;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px #ccc;
}

h1 {
    text-align: center;
    color: #2c3e50;
}
h3 {
    text-align: center;
    color: #0831b8;
}
.timer {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 15px;
    color: green;
}

.timer.red {
    color: red;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    margin: 10px 0;
}

label {
    margin-left: 8px;
    cursor: pointer;
}

button {
    width: 100%;
    padding: 10px;
    border-radius: 25px;
    margin-top: 15px;
    background: #3498db;
    color: #fff;
    border: none;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #2980b9;
}

.hide {
    display: none;
}