body {
    font-family: Arial;
    background: linear-gradient(to right, #4facfe, #00f2fe);
    text-align: center;
    margin: 0;
    padding: 0;
}

.quiz-box {
    width: 90%;
    max-width: 500px;
    background: white;
    margin: 80px auto;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
}

h2 {
    font-size: 20px;
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: none;
    background: #eee;
    cursor: pointer;
    border-radius: 8px;
    transition: 0.3s;
}

.btn:hover {
    background: #ddd;
}

.correct {
    background: green !important;
    color: white;
}

.wrong {
    background: red !important;
    color: white;
}

#next-btn {
    display: none;
    padding: 12px;
    margin-top: 15px;
    background: #007bff;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 8px;
}.btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: none;
    background: #f0f0f0;
    cursor: pointer;
    border-radius: 8px;
    transition: 0.3s;
    font-size: 16px;
}

/* HOVER OFF after click */
.btn:disabled {
    cursor: not-allowed;
}

/* CORRECT ANSWER */
.correct {
    background-color: #28a745 !important;
    color: white !important;
}

/* WRONG ANSWER */
.wrong {
    background-color: #dc3545 !important;
    color: white !important;
}