body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #2c2c2c, #6e6e6e);
    margin: 0;
    height: 100vh;
}

/* Quiz Box */
.quiz-container {
    width: 40%;
    margin: auto;
    margin-top: 80px;
    padding: 25px;
    border-radius: 15px;

    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);

    color: #ffffff;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    text-align: center;
}
/* Progress Bar */
.progress {
    width: 100%;
    height: 8px;
    background: rgba(255,255,255,0.2);
    border-radius: 5px;
    margin-bottom: 15px;
}

#progressBar {
    height: 100%;
    width: 0%;
    background: #00c9a7;
    border-radius: 5px;
}

/* Timer */
#timer {
    margin-bottom: 15px;
}

/* Options */
#options button {
    display: block;
    width: 100%;
    margin: 10px 0;
    padding: 12px;
    border-radius: 8px;
    border: none;
    cursor: pointer;

    background: rgba(255,255,255,0.15);
    color: white;
    transition: 0.3s;
}

#options button:hover {
    transform: scale(1.05);
    background: rgba(255,255,255,0.4);
}

/* Selected */
.selected {
    background: #00c9a7 !important;
    transform: scale(1.05);
}

/* Button */
#nextBtn {
    margin-top: 20px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    background: #00c9a7;
    color: white;
    cursor: pointer;
}

#nextBtn:hover {
    background: #00a889;
}

/* Result */
#result {
    text-align: center;
    color: white;
    margin-top: 100px;
}

/* Animation */
.fade {
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

.hidden {
    display: none;
}

.correct {
    background-color: #28a745 !important;
    color: white;
}

.wrong {
    background-color: #dc3545 !important;
    color: white;
}

.disabled {
    pointer-events: none;
}

#nextBtn {
    display: none;
}